SURFACE MINING |
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Mobile Equipment in the Quarries for Limestone Cleaning from Clay Inclusions Practice development limestone quarries showed that productive thicker deposits are often found karsts and zaglinizirovannye zone of intense fracturing. P. 3—11 |
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STATIONARY INSTALLATIONS |
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Prospects of Application of Fans Low Pressure in the Mining Industry The article discusses energy savings through the introduction of local ventilation system of underground mining production of low pressure fans. P. 12—15 |
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CRUSHING AND MILLING EQUIPMENT |
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High-Frequency Machines for Rock Breaking — One of Energy Saving Directions in Ore Processing Review existing technological scheme ore preparation mining enterprises. Significant differences in power inputs for crushing and grinding. Analyzed the existing structures of cone crushers, detected ways of increasing the degree of fragmentation. Designs of high-crushers, grinding carrying material "in the layer". Experiments were performed on laboratory samples of high-frequency vibration machines with external located vibrators. The results, which can be seen to reduce the of energy consumption operations disintegration ore-preparation process stages using high-crushing machines. P. 16—19 |
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ELECROMECHANICS. AUTOMATION |
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Control Systems of Electric Drive Air Blower and Power Pump for Maintaining the Thermal Regime in Shafts The articles deals with presents the measures that improve energy efficiency and resource conservation in the implementation of air handling in the cold season in underground mining operations. Saving natural resources is achieved by reducing the water flow at a controlled feed it to the heat exchangers. The use of controlled electric blowers will reduce energy consumption expended on air treatment and provide the required mode "miscibility" flows. Proposed in the article management system of electric network pump and blowers can improve the operational safety of mine shafts at low outside temperatures. P. 20—24 |
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RESEARCH AND DEVELOPMENT |
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Conditions Similar to the Process of Destruction of Rocks when Crushing and Grinding The paper discusses the necessary and sufficient conditions that allow reasonably into correspondence research results on physical models to full-scale objects such complex processes as crushing and grinding of rocks and ores. The analysis of the functional dependence of the parameters characterizing the processes of destruction of materials in general. The results of the research allowed to specify the functional dependence of the process of destruction of rocks with the free kick. Establish additional facts showing that a free kick in crushing failure of the specimens occurs under the action of tensile stresses. In contact with the object of destroying the executive body of the car in the contact zone rocks pereizmelchaetsya first material and compacted. Upon reaching a critical size, the compacted core acts on the unruptured portion as a wedge piece, and there is a general destruction piece when exceeding the tensile strength of the material. This suggests that the destruction of the rocks hit a parameter called the rock tensile strength is more informative than the elastic modulus. In the analysis of the divisibility of rocks and ores with a free kick as the indicator should be used strength of crushed material strength. P. 25—28 |
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Rational Geometrical Parameters of the Working Surfaces of the Rail and Wheel Tread Career Locomotive Operating in the Mode of Traction In the theoretical studies of the interaction of wheel tyres career locomotive rails in terms of conformal single point of contact (when driving on the straight parts) and ridge point-to-point contact (when driving on curved sections) career track; using the mathematical dependence of the radius of curvature of the working profile of the rail head and wheel tread in their area of contact, and provides guidelines for determining the radii of the contacting surfaces to ensure conformal contact, increasing traction system capacity "wheel — rail". P. 28—33 |
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Hydroautomatic System Quenching of the Dynamic Vibrations Was developed hitch of the ripper and hydroautomatic system dynamic quenching oscillations that occur in working unit to prevent the transmission of vibrations to the base of the machine. Made the mathematical model for determining the time delay operation of the hydroautomatic system of dynamic quenching of oscillations, whose value can create hydroautomatic system damping time reacting to dynamic external disturbances. Was made a calculation of the period of cleavage the soil when ripper work and the time delay operation quencher dynamic oscillations from which it is possible to establish the ability of the hydroautomatic system of dynamic quenching oscillations in time operate. P. 34—38 |
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Development and Study Ways to Eliminate Flutter Drilling Toolset Support Assembly of Rotary Drilling Rig When operating drilling rigs constantly arise extreme dynamic loads. Their devastating effects on the equipment and staff appear suddenly, unpredictably due to flutter for drillers drilling tools. Flutter drilling tools leads to an increase in electricity consumption, increased wear of drilling tools and large vibration in the workplace driver drilling rig. A new way to eliminate flutter drilling tool, which allows you to reduce the dynamic loads on the drilling rig components, as well as vibration in the workplace driver to sanitary standards and to increase the speed of drilling. P. 39—42 |
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REVIEWS |
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Raising Effetctivness in the Use of Drilling Machinery in Northern Open Pits by the Introduction of Innovative Technical Works Technical solutions are suggested to cool a purged airflow with the goal of preventing the disruption of drillholes temperature regimes and the plugging of drillholes with drill cuttings. P. 42—48 |
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UNDERGROUND MINING |
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On Perspective Use and the Adaptive Feeders Modification for the Ore Output A rational way of the efficiency increase and safe deposits working-out during the underground extraction of the solid mineral deposits on the great depth is suggested. Also the development systems with the ore caving and output under the covering rocks using the modern technical equipment adapted to the mining conditions resulted in the assembly labour-consuming and the details and knots transportation reduction are considered. P. 3—6 |
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DRILLING OPERATIONS |
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Development of an Autonomous System of Electric Drive Vibration Isolation — Vibration Dynamic Damper of Support Assembly of Rotary Drilling Rig A new system of autonomous damping of oscillations of electric drive longitudinally to rotary drilling rig ÑÁØ-250 is developed. This system also serves as a dynamic damper of support assembly oscillations of drilling rod of rotary drilling rig. Also additional damping of support assembly vibration is carried out due to the impact of multi-directional force field applied by pressure ropes and lifting of drilling rod. Lifting ropes are attached not as usual for most rigs with cable and tackle feeder and lifting of drilling rod, to the electric drive, which is separated from the reference node by bus-gear clutch. In the developed system, lifting ropes with head ropes are directly related to the support assembly without additional elastic ties. These ropes are defined pretension of such magnitude that, in the process of drilling a hole, as well as when you remove it from the drilling rod provides maximum reduction of the dynamics of oscillations of the support node. Computer parametric modeling of the effectiveness of the developed system is carried out. P. 7—13 |
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Application of Downhole Hammers in Underground Mine Development The article describes the findings of the theoretical and experimental researches on the downhole pneumatic impact machine and the rock-breaking tool to it. The researches resulted in the creation of the new downhole hammer which is characterized by the improved operational cycle and high energy of a unit impact. P. 13—17 |
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MINING TRANSPORT |
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Methodological Approaches to Determination of Specification and Quantity of Road-Building Machinery for Open Cast Mining The manuscript provides methodologies of approach to determination of specification and quantity of road-building machinery for open cast mining. P. 18—24 |
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The Universal Device for Monitoring at Operation of Process of Pro-Slipping of Wheels of the Career Locomotive and Performance of Actions for its Decrease Based on the compensation method of measurement developed a device that allows for a virtually unlimited time to control the operation of the wheel sets of the locomotive in real operating conditions regardless of the type of locomotive traction. This creates opportunities for the development of appropriate automated systems to eliminate or reduce slippage of the wheel pairs, which, in turn, will reduce wear and energy costs in the operation of locomotives and will contribute to the improvement of their technical and economic indicators. P. 24—28 |
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DEVELOPMENT OF PEAT DEPOSIT |
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Justification of Rational Structure of the Fuel and Energy Autonomous Complex Peat Raw Materials The excavator way of production of peat raw materials as lowering negative anthropogenous impact on an ecological situation and economically expedient the structure modular mountain processing a complex with mini-thermal power plant Is offered is considered. The mathematical expressions connecting geometrical parameters of a disk separator among themselves are given formulas of calculation of geometrical parameters of working elements of a disk separator Are presented. Need of carrying out pilot studies is shown according to efficiency of a disk separator for peat raw materials of natural humidity. P. 29—35 |
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RESEARCH AND DEVELOPMENT |
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Efficiency Indices of Mining Heading Equipment Covers the actual task of evaluating the effectiveness of mining and technology in the creation of new or modernization of existing equipment. The necessity of the development of the methodology for assessing the effectiveness and choice of criterion of efficiency as a multivariate problem. The technical and economic parameters, to be used as performance criteria for different target units or components of the system of technical and economic constraints. Basic principles of qualimetry for quantitative quality evaluation. Proposed efficiency ratio, integrating basic technical criteria — performance technical systems, the complexity and power consumption of the processes relative to the reference (base) variant, taking into account the probability of achieving the desired result. The efficiency ratio represents a single dimensionless parameter, which reflects the change of the output capacity of the system compared with the base case in comparison with the same indicators of the complexity and intensity. Provides requirements for the selection of the base case, as well as possible areas of application of the efficiency ratio. P. 36—42 |
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Model of Electrohydrodrive of Executive Branch of Frontal Aggregate of Continuous Action The model of drive of executive branch of frontal aggregate is presented, that is the means of mechanization of coulisse of minerals. P. 43—48 |
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UNDERGROUND MINING |
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Complex for Salvage Action on Mine in Blockages The variants of structures for the conducting save excavations. P. 3—8 |
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The Classification of the Cutting Heads of the Drag-Hook Plough Systems Basic advantages of the drag-hook plough systems in comparison with the slide plough systems are small width of corps of the cutting head and location of haulage chain at the conveyer from the side of a support. The requirements are indicated to the construction of the cutting heads. The different variants of the cutting heads of the drag-hook plough systems are described in detail, namely: symmetric and asymmetric cutting heads that can be executed as monoblock or component construction, working with wringing out of conveyer line and without wringing out of conveyer line. The construction of the component cutting heads may provide a force taking of non-working picks and can be performed without a force taking of non-working picks. There is a description of construction of the cutting heads with the different variants of regulation on a height: step, combined and hydraulic, and also on the construction of plate under a conveyer: three elements and more than three elements. The large variety of constructions of the cutting heads of the drag-hook plough systems necessitated the creation of their classification, which is given in the article. P. 9—14 |
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SURFACE MINING |
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Dredges with the Working Bodies of Dual-Purpose The design of work equipment shovel with two separately operating working bodies: scoop bucket and ripper tooth or a hammer. The substantiation of the use of such work equipment in open cast mining and construction. P. 15—19 |
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STATIONARY INSTALLATIONS |
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Need for Slowdown of Lifting Vessels in an Emergency Braking on Mine Hoist Installations The paper analyzes the main shortcomings of the safety brake of mine hoist installations only by applying braking force on the drive drum. In this case, deceleration of vessel is carried out at the expense of the weakening of rope tension, which will inevitably lead to significant overloads of traction organ after stopping the lifting machine. Many researchers have expressed the idea of selective braking mode, depending on the position of the vessel in depending on the position of the vessel and causes an alarm is triggered on the implementation of the emergency braking. However, an effective method of reducing the dynamic loads on the rope in the event of sudden braking of the laden vessel at this stage is not offered. For example, the emergency braking of vessel if it hangs of empty skip and speeding at the approach to the reception platform complicated by the fact that the braking distance is limited. In these cases, the known methods of reducing dynamic loads on the rope not apply. In this paper it is proposed the implementation of a safety braking under slowdown of lifting vessel. In this case the overall slowdown of mine hoisting installation is increase and reduced the weakening of the rope relative to the equilibrium state, and therefore reducing the value of the dynamic loads after stopping the hoist machine. This method will be useful for emergency braking for lifting equipment with multi-rope traction friction. This method will reduce the probability slipping on the ropes lining the drum at the safety stop. P. 20—25 |
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RESEARCH AND DEVELOPMENT |
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Non-Pulse Control of the Operating Mode of Hydroracks of Sections Hydraulic Powered Support the Clearing Mechanized Complex The article discusses the possibility of adapting the linear sections of mechanized roof supports to the variable geological conditions when developing sloping seams of medium thickness long complex-mechanized coal face. Adaptation is provided by the management of mountain pressure on the rate of change of pressure in the piston cavities legs with static work loads on the lining. Regulation of mining pressure is in the range from the bottom, accept higher pressure than the initial thrust to the top, taken below the pressure of the relief valve of the hydraulic jacks. P. 26—30 |
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The Efficiency of the Reinforced Abrasive Circles The article presents a study to identify the parameters that affect the cost-effectiveness of community-reinforced when the cutting and stripping operations. P. 31—34 |
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INFORMATION |
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International Scientific and Practical Conference "Mining Electromechanics—2014: Problems of Increasing the Efficiency and Safety of Operation of Mining Equipment" Information about the International scientific and practical conference "Mining Electromechanics—2014: problems of increasing the efficiency and safety of operation of mining equipment", held on 27—30 October 2014 in State National Research Politechnical University of Perm. P. 35—38 |
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55 Years of Design Service BelAZ: Time to Sum Up, Reason to Look to the Future P. 38—42 |
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Department of "Automation and Control in Technical Systems" NITU "MISiS" — 55 Years: History, Prominent Figures, Scientific Directions P. 42—45 |
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UNDERGROUND MINING |
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Improving the Efficiency of Combines Potash Mines in the Analysis of Records We propose a method for controlling parameters and proved the concept of on-board software system mining machines "Ural". The results of experimental studies of loads drives executive bodies combines "Ural-20R". The technique of analysis of records, providing more efficient operation of the equipment mechanized mining complexes by quantifying the quantities characterizing the technical and technological level of the organization of the process of extraction of potash ore. Criteria of evaluation of the effectiveness of engineering and support services of the mining enterprise. Describes a continuous automated control outburst potash array. P. 3—10 |
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Analysis of the Technical Feasibility of the Plow Recess To date, hydromechanical method for breaking coal and rock well-proven. However, the use of plows complicated and even impossible in the presence of coal seam hard rock inclusions. In this connection, to extend the scope of plows expedient to use in the process them hydromechanical fracture development providing hard coal and rock strength. Possible schemes hydromechanical fracture allowed to establish the most preferred scheme in which high pressure water is fed through a channel formed in the cutter body, directly to the zone of contact with the tool array degradable. Currently, this scheme is known as a scheme "to flow through the tool". After analyzing the options proposed layout of machinery, it can be concluded that the preferred option using pumping equipment. A scheme of arrangement of pumping equipment complete plow, and taking into account the rather large dimensions of the pump unit, it is advisable to implement a scheme to pump unit made in drift. This solution will reduce the weight of the plow, will reduce the energy consumption of the process of moving the plow along the face and keep your workspace. P. 10—13 |
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DRILLING OPERATIONS |
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Analysis of Efficiency of the Driving of Wells in Frozen Soil by the Boring and Crane Cars Equipped with the Tool with Various Cutting Elements The description of designs of serial bladed and spiral drills and various cutting elements for their equipment is provided. Designs of flat and spiral boring heads to screws for which equipment various designs of cutters from coal and ore mining industry are used are briefly described. The purpose of pilot studies of drills with various cutting elements in frozen soil is formulated and the short description of designs of these drills is given. Results of pilot studies are stated, their analysis on the speed of drilling of frozen soil is given. By results of these researches the optimum width of the cutting edge of a cutter is chosen and rational designs of the unified cutting elements for equipment bladed, spiral and the short- screw of drills of an easy series are created. P. 14—20 |
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MINING TRANSPORT |
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Promising Technologies of Backfill Mixture Haulage in Mines of Kazakhstan The article addresses the development of rational flow charts and methods of backfill mixture haulage in Kazakhstan mines. The authors have analyzed actual backfill mixture haulage flow charts. The design parameters of pipelines for a number of mines have been given. The rheological properties of mixtures, related to the quantity of plastifier, have been defined as well as the structure and chemical composition of backfill mass test cubes made of the mixture used currently in mines of Kazakhstan. The new flow charts of backfill mixture preparation and haulage have been proposed. These flow charts imply preparation of backfill in surface mixers, its haulage into a mine by vertical pipelines and self-propelled mixers, and the supply of the backfill into mined-out voids by pipelines using pumps. The novelty of the investigations consists in defining rheological properties of backfill mixtures with their binder and plastifier content. The results presented in the article can be used for designing and exploitation of backfill preparation plants in mines. P. 21—28 |
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Evaluation of Waste Oils Reuse in ALROSA (OJSC) and Selection of Waste Treatment Methods in the Current Economic Conditions The article presents an overview of waste oil and process fluids treatment methods in the current economic conditions in ALROSA. Based on the economic efficiency assessment of combinations of technologies for waste disposal, recommended practices on recycling and regeneration of waste oils and process fluids are offered taking into account the capabilities of modern equipment. P. 29—36 |
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UNDERWATER MINING OF MINERALS |
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The Calculation of Buffer Vessel Immersion Depth in the Systems of Rock Mass Hydraulic Hoisting from the Seabed Nowadays there are no reliable and energy-efficient systems for the ferromanganese nodules development and transportation from the deep seas and oceans on the surface of the water. The most important aspects of the production module designing and developing is the definition of the buffer vessel lowest depth, which influences in the establishing and operating costs of the equipment since an increase in the depth increases the length of the pipeline, rigidly fixed to the mining vessel, increases the water pressure, which affects the design features and reliability of the equipment, and also influences in the costs of maintenance staff safety. P. 37—40 |
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RESEARCH AND DEVELOPMENT |
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Systematization of Parameter of Rocks Erosion Destruction with Abrasive Waterjet Parameters of rocks erosion destruction with abrasive waterjet are shown and systematized on the basis of complex indices. At this considering of erosion is as of deformations of various nature occurring simultaneously. P. 41—44 |
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SOME HISTORY |
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Alternating Current Drive Idea for Mining Mashinery with Invariant Control, According to Tulin V. S. P. 45—48 |
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UNDERGROUND MINING |
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Selection of Technological Schemes and Equipment for the Working of Coal Layers in the Mines JSC "SUEK-Kuzbass" Presents the standard modules of technological schemes of the driving of the tunnel combines selective and continuous action. Recommendations on the choice of equipment and the main technical and economic parameters of operation of the standard modules of the tunnel systems in the mines of JSC "SUEK-Kuzbass" P. 3—10 |
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The Cutting Heads of the Drag-Hook Plough Systems for the Working of Seam with Total Thickness The creation of the cutting heads of the drag-hook systems for the working of the coal seam with total thickness will allow substantially to bring down the non-productive expense of time on breaking of coal hunches and on caving of overhead part of coal in the longwalls with non-self-caving overhead part of coal and also will allow to apply of the powered supports in such longwalls. The cutting heads with spring and hydraulic regulation of height for the working of seam with total thickness were created in the Shakhty research and design institute of coal mining (ShakhtNIUI). P. 10—15 |
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ELECTROMECHANICS. AUTOMATION |
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Mechatronic Device for Automatic Control of the Feed Shaft Loading Machine The aim of this work is the creation of a management system feeder shaft loading machine with a pair of sweeper legs, ensuring maximum performance while protecting the mechanism from the power and thermal overloads. Outlined the need to create, a brief history of the research and development of such devices, structure, principle of operation and design. The system contains mechatronic device capable of receiving, analyzing stochastic information about the state of the drive sweeper paws and transmission loading machine and automatic generation of control actions on the feed mechanism of the machine on the stack. During operation of mechatronic module and the sensors of the main parameters control the maximum and equivalent load of the engine, the switch frequency of the slip clutch with hydraulic drive and output capacity of the loading body. The control algorithm provides for discrete change of setting levels setting device according to combinations of values of controllable factors. Visualization of information about the condition of the machine, the possibility of switching to manual control in emergency mode and when performing shunting operations. At that maximum productivity can be achieved with full use of the power and energy resources of the machine. P. 16—24 |
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The Means and Methods of Power Saving and Efficiency Increasing in Mining Enterprises The necessity of applying of complex energy saving and efficiency increasing measures in power supply systems of mining enterprises is proved. The reasonability of energy examination for detecting the most effective energy saving and efficiency increasing measures is shown. The base measures for energy saving and efficiency increasing are detected. The base technical means and measures for energy saving and efficiency increasing in conditions of mining enterprises are presented. Among presented technical means and measures the most important are: means and measures for automated sectioning of distribution power networks, power quality rising, guaranteed power supply from alternative and renewable energy sources, high-speed automatic load transfer. The necessity of continuous monitoring of energy saving and efficiency increasing means and measures applying is shown. P. 25—30 |
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CRUSHUNG AND MILLING EQUIPMENT |
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Features Working Process Jaw Crushers with Simple and Complex Swing Movable Jaw Choice of rational design and operational parameters of jaw crushers, makes full use of the technical capabilities of the equipment within the specified operating conditions, is one of the main objectives in the design of equipment. In this paper, based on the analysis of the mechanisms of jaw crushers with simple and complex swing movable jaw identified kinematic and technological features of the workflow crushers. It is shown that in a grinder with a complex swing cheek duration of withdrawal of various parts of the movable cheek by cheek exceeds the duration of the fixed approach. In this case, the rate of passage of crushed material to the crushing chamber increases. An analysis mechanism configured power grinder with a complex oscillation cheeks showed that the duty cycle comprises two phases crushing — at the beginning and end of the cycle. The dependence to determine the maximum possible value for the crusher crushing force with a complex swing movable jaw. The results of analysis of the mechanisms of jaw crushers allow a synthesis of design schemes with rational regime parameters. P. 31—34 |
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MECHANICAL ENGINIRING |
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Assessing the Possibility of Using the Solid-Phase Sintering Method to Produce a Bimetallic Structure Body Rock Destruction Cutter Service life rock cutting tools can be essentially increased their body shell manufacture of high-hardness wear resistant low alloy ferritic steel and the core to provide resistance to shock loading structure — austenitic steel of high viscosity. To make the body of the bimetallic structure is proposed a method based on a joint high-temperature plastic deformation of the materials of his shell and core due to the difference in thermal expansion coefficients of the steel used. P. 35—38 |
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REPAIR. RELIABILITY. DURABILITY |
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The Ways to Organize an Effective System of Mining Equipment Maintenance By identifying the factors that influence the repair service effectiveness of the mining enterprise, the study of the following problems became possible: the structure of the calendar time-fund, balance sheet analysis time for planning, preparation and repair of mining equipment, the definition of functional chief mechanic. Function given basic block system maintenance and repair of mining equipment, allowing to determine the level of energy efficiency and mechanical services company. P. 39—43 |
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SCIENTIFIC RESEARCH AND DEVELOPMENT |
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Elementary Method for Calculation of Hard Rocks Erosion Caused by Abrasive Waterjets The method of the theoretical description of the process of the brittle materials (to which most of rocks are belonged) destruction is proposed. The method is meant to determinate such a parameters of the rock destruction process as are a cutting depth, an erosion velocity and a velocity of the side surface cracks increment. The dependences are accurate for every brittle material that interacts with any medium bringing abrasive particles if it’s possible to neglect medium’s erosion action. The method contains a significant number of assumptions and simplifications. However authors thought that the main task for the theory of such a complex problem is to give an understanding of the process’s mechanism and to estimate its basic patterns. The simple model that can reproduce essentials of the process is fit for this purpose. So the paper might be considered as a conception. P. 44—48 |
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UNDERGROUND MINING |
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Adaptive Removoble Feeders of Passive Action A rational way of the expensive and safety in crease for the solid minerals working out during the underground output on the depths was suggested including the system processing variations use with ore caving and output under the suspended rocks using principally new technical appliances adapted to the mining-geological conditions simultaneously reducing the assembly, knots transportation and a new construction details labor capacity. P. 3—6 |
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ELECTROMECHANICS. AUTOMATION |
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The Algorithm of Automated Management of the Mine Dewaterintg Installation The issues about basic requirements for the mine drainage systems of automation were reviewed, on the basis of which, the algorithm of this drainage in the automated mode was determined. And the included subprogram's was determined too. P. 7—16 |
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Multistage Automatic Transfer Switch System in Power Supply Systems of Mining Enterprises Objects on the Basis of Uninterruptible Power Supplies The problems of reliability improving of power supply mining enterprises electrical systems are considered. Structural schemes of power supply are analyzed to develop a framework and to provide uninterrupted power supply of responsible consumers by multistage automatic transfer switch system. The necessity of the uninterruptible power supply using to minimize the power supply interruption of responsible consumers is justified. The structure of the power supply system, which minimizes the power supply interruption of responsible consumers, based on uninterruptible power supplies, thyristor switches and controls, provides the phase synchronization with the input switching and redundant power supplies is proposed. P. 17—20 |
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STATIONARY INSTALLATIONS |
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The Experimental Research of Mining Hoist Plant Operation Mode Influence on Dynamic Loads in the Wire Rope The experimental research results of a hoist plant operation mode are described in the paper. The obtained data were analyzed, conclusions about dynamic loads impact on the wire rope at different stages of skip lifting are determined. The dynamic loads reasons are described. The dynamic loads influence on wire rope durability is estimated. P. 21—25 |
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REPAIR. RELIABILITY. DURABILITY |
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Technology and Economy of Service as Part of the Cost of Ownership of Mining Equipment A new technology of power shovels and walking draglines service by using modern methods of technical diagnostics and the portable machine tools, proving an advantage over the classical method of preventative maintenance. P. 26—30 |
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Reduce the Frequency of Repairs and Maintenance Costs Application of Plasma Quenching and Carbonitriding The results of laboratory tests of steels with different types of reinforcement. It is shown that plasma hardening and carbonitriding more effective in reducing wear than through hardened and tempered alloy steel (better). This greatly extends the life of the components, reduces the frequency of repairs and maintenance costs, increase working time fund equipment, while reducing the purchase of alloy steels for parts. P. 30—33 |
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SCIENTIFIC RESEARCH AND DEVELOPMENT |
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Choice of the Rational Parameters of Cutting Part Drilling Tools with Using the Finite Element Method The paper presents the calculation method of rational design parameters cutting part of the drill cutters providing high efficiency blast hole drilling and its required strength. At the same time, finite element method, implemented software package ANSYS are used. Due to the rocks classification on the contact strength, proposed by prof. L. I. Baron, the systematization of their physical and mechanical parameters were performed. The minimal taper angle dependence on the contact strength of rocks have been established. P. 34—39 |
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Determination of Resistance to Cutting of Frozen Rocks Deeply Blocked (Slot) The analytical dependence (mathematical model) to calculate the cutting forces permafrost rocks on the basis of the analysis scheme of the forces and stresses on the element chip to the limit state when deeply blocked the way are proposed. P. 39—44 |
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Effect Thermal Stresses on the Value of Allowable Radius Waviness of Mine Hoisting Rope Existing methods of calculation of the permissible radius undulation rope double strand with a metal core does not take into account thermal stresses resulting from temperature differences screw elements arranged in different layers of the ropes. Due to sharp falling of the rope under the influence of high temperature, uneven heating of the layers of the spiral elements leading to change of stress-strain state and, accordingly, the loss of carrying capacity of the rope. Was considered the heating unit of the ridge rope consisting of three layers of screw elements having a corresponding cross-sectional area and temperature. Expressions have been obtained temperature movements of the rope as a whole and its screw elements with uneven heating. The strength of the most loaded wire rope having a waviness with regard to the reduction of the tensile strength of the wire material. It is shown that at high temperature the influence of temperature above 400 °C steel ropes must not be operated rope even in the absence of the defect waviness. P. 44—47 |
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REPRESENT AN ORGANIZATION |
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Diploma of Kuzbass State Technical University — a Sign of Quality Specialist A brief historical information on the events related to the base of the Kemerovo Mining Institute. The characteristic of the current state of the Kuzbass State Technical University. P. 3—7 |
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Department of Mining Machines and Complexes of the Kuzbass State Technical University after T. F. Gorbachev P. 7—8 |
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UNDERGROUND MINING |
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The Main Stages of Development and Modeling Parameters of the Disk Tool Roadheaders and Shearers The essence of the main stages of the development of designs and simulation results the parameters of the stress state of a replaceable modular attachment points of the set of disk tools for the destruction of coal and rock face massifs of effectors roadheaders and shearers. Grounded perspectives of the use of disk and cutting tools double action on the multifaceted prisms reverse the working bodies of the mining machines. P. 9—16 |
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MINING TRANSPORT |
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Influence of the Length of the Scraper Conveyor to Dynamic Loads in a Traction Calculation In order to improve the life of trouble-free scraper conveyor method of determining the margin of safety circuits not only for static loads in traction body, but also in terms of total static and dynamic loads acting in them is proposed. It is possible to significantly reduce the dynamic loads to increase the margin of safety and increase the service life of the traction body by changing the length of the conveyor. P. 17—22 |
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Fire Safety Belt Conveyors: Problems and Solutions The analysis of technical solutions to ensure fire safety belt conveyors. P. 22—27 |
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REPAIR. RELIABILITY. DURABILITY |
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Assessment of Technical Conditions Auger Machines Vibration Parameters The approach to determine the actual state of technical co-auger equipment, which is manufactured according to customer requirements. The proposed approach is based on the analysis of mechanical vibrations that occur at nodes auger equipment during operation. Regular monitoring of the equipment will allow to predict the repairs and reduce the likelihood of an emergency stop equipment. P. 28—32 |
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RESEARCH AND DEVELOPMENT |
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Information Security Assessment Method Manual Mine Complex Systems Describes a method for assessing the information security of a complex system, in which basis — the dependence of the security of the system by its richness of information. We consider the use of information in relation to the method of explosion-proof magnetic starter, control systems and power shafts. Ways of improving the reliability and safety of operation of the systems considered. P. 33—37 |
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Simulation of Large Volume Elements at Once or Violations Coal Disc Cutters Based on laboratory tests conducted at a caf. "Mining machines and systems" were obtained regularities of the influence of the coal strata corners of the array elements in the volume of large masses cleaved by the action of the disc cutter. Data on energy consumption allow to characterize the performance of the fracture process tool and evaluate its technical level. P. 37—41 |
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A Comparison of Wear of Geokhods Out of Cross Section Cutting Heads The paper deals with the evaluation and comparison of geohods' out of cross section cutting heads for the external propulsor and stabilization elements wear. The dependence which reflective of ratio of ways of cutting of crown-type to disc-type cutting head with the same working condition is deduced. It was found that by the wear parameter the rational type of cutting head determined by the ratio of the cross-sectional dimensions of the groove. The results can be used for the development of the design of geohods' out of cross section cutting heads. P. 41—45 |
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Determination of the Entry Point Geokhod Cutting Drum Pick in Contact with Rock In this paper we solve the problem of determining the entry points of picks, installed on geokhods cutting drum, in contact with the rock for different lines of cutting. We obtained an equation for determining angles of cutting drums rotation at which the picks are engaging a rock. It is necessary to assess torque resistance variation on the geokhods executive body. P. 45—48 |
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REPRESENT AN TECHNOLOGY MINING ENGINEERING, OOO |
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Experience a New and Modernization of Existing Mining Equipment Consider a practical experience of the engineering company. It found a way to increase efficiency through the creation of intellectual property and its capitalization. Reducing the depth of refining and updating the product line — effective measures to improve the business enterprise. P. 3—6 |
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Cost of Production of Small Engineering Companies as an Example of "TGM" We consider the cost of a small engineering company in comparison with major competitors in the uzlah-analogues. The advantages of small business to large: the market — lower the price of products related to performance — a big margin. P. 6—10 |
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REPAIR. RELIABILITY. DURABILITY |
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Automatic Lubrication System of "BEKA" for Mining Equipment Company BEKA manufactures and supplies all the necessary components to build an effective automatic centralized lubrication system —from themselves hydraulic system components — pumps for lubrication, valves, hoses and piping elements to the electronic control units and control systems and sensors. The use of such lubrication systems to ensure timely supply of fresh lubricant in the friction units, significantly increases component life, save for reducing machine downtime for maintenance and the cost of the lubricants themselves. Among the best known consumer products BEKA — Volkswagen, Liebherr, Komatsu and a number of European railways. It is essential to support its supply service offerings, such as services for installation and commissioning. P. 11—14 |
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Production of Spare Parts and Mining Equipment Asbestovsky Repair and Engineering Plant Asbestovsky repair and engineering plant produces spare parts, OOO, for mining equipment, is composed of casting, mechanical assembly shop, fabrication shop, Forging site repair electromechanical plant, central laboratory. The quality management system is certified according to the standards of ISO9000 and ISO14001. P. 14—17 |
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Rubber Products for Mining and Drilling Equipment The article presents data on rubber goods, manufactured in the company "Valencia & Co." such as rubber linings of mills, cuffs, rubber pipes, cyclones linings, Rubber modular screens, etc. P. 17—23 |
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MINING TRANSPORT |
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By Evaluating Mining Conditions Pit Dump Evaluations vnutrikarernyh highways based on the horizontal equivalent of vertical movement of the rock mass. Based on the results of experimental and analytical studies of the method of calculation of horizontal equivalents using the energy criterion and time of movement of dump trucks on the highway. Shown testing techniques for improved planning and regulation of diesel consumption and performance pit dump trucks. P. 24—29 |
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CRUSHING AND MILLING EQUIPMENT |
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Research of the Grinder with the Rotor of Counter Blow on Particle Size Distribution of the Product Influence of a form of channels of a grinder with a rotor of counter blow on particle size distribution of a product on the example of model of a grinder of laborotorno-experimental ILE-200-50 is considered. Dynamics of particle size distribution of a product on each stage of crushing of material by a rotor with radial and not radial channels of the second is presented. P. 30—34 |
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Strength Calculations of the Strength of the Frame and the Shaft of Crushing Cone Crusher The article describes the calculation of the strength of the frame and the shaft of crushing cone crusher for fine crushing with the hydraulic system of unloading from tramp bodies. The analysis of stress-strained state of carrier elements cone crusher. The method of finite elements. Presents three-dimensional model with the identified areas of maximum stress. It uses specialized software package APM WinMachine. P. 34—40 |
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RESEARCH AND DEVELOPMENT |
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The Technology of the Experiment to Study the Effect of Forced Oscillations on the Performance of Auger Drilling Unit The article describes the technical and technological part of an experiment to study the influence of forced oscillations on the performance auger drilling unit. The basic ways of measuring the axial force, the speed of rotation of the tool and forced vibration frequency. Described registering module and the data collected for analysis. The article presents the summary preliminary results of data analysis. P. 41—44 |
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Increasing Use Steps of Mechanisms Excavator In open cast mining trend of production of technological units of large unit capacity is becoming more tangible which leads to an increase in energy consumption for their operation. Reducing energy consumption can be achieved using sophisticated schemes of mechanisms, including walking mechanisms, providing the technological power of the movement of such units as draglines moving to clay soils with low bearing capacity. P. 44—47 |
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Comparative Assessment of Effective Remedies Quarry Vibrotransportiruyuschih Car from Shock The analysis of the means of protection against shock vibrotransportiruyuschih mining machines. It is shown that the protection means provide reducing shock to the disturbance limits, but there are deviations from the nominal operating conditions result in inefficient operation. A device for protection against shocks, which is a rigid structure in the form of a grate. By separating operations vibrotransportation and protection against shocks achieved higher productivity and reliability vibrotransportiruyuschey machine. P. 47—50 |
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Analysis of the Power Circuits of Mining Machines Basis for the development of mining industry are high-performance systems for mining machines and equipment of the new generation, providing a significant reduction in production costs. At the design stage of a new generation of mining machines put the task of choosing a rational perception of the power circuit and closing the main characters in the design loads. In this paper, the analysis of the power circuits of mining machines for underground and open pit mining. It was found that the form of the power circuit of the machine depends on the method of breaking rock and structure of the executive body, as well as the layout of the working bodies and units of the machine. It is shown that the decrease of metal machinery and energy efficiency of the process is achieved by closing the existing pressures on the least short stretch. P. 50—55 |
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SURFASE MINING |
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Complex Assessment of the Factors Defining an Operating Time of Excavators EKG a New Product Line of "IZ-KARTEX" Theoretical ground over of a complex of the factors influencing the size of an operating time of quarry single-bucket power-shovels is given. The structure of model of complex estimation of size of operating time of quarry power-shovels offers. Complex indicators of effectiveness retention ratio of single-bucket power-shovels are proved and offered. P. 3—9 |
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Ensuring the Sustainability of the Rotary Platforms Shovels Presents summary of the reasons tilt of shovel in the process and assess their impact on the stability of the rotary platform. Given a technical solution to reduce the impact of human factors to ensure the sustainability of the rotary platforms. P. 10—14 |
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MINE VENTILATION |
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Variable Ventilation Mode of the Working Area: Feasibility Analysis The algorithm of determination of variable mode functioning parameters of the drifting face ventilation system in the conditions of mine on the Nezhdaninskoye deposit is considered in the article. The organization of the mentioned airing way in a deadlock driving face is directed on increase of energy efficiency and energy saving when functioning means of local ventilation. P. 15—19 |
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MINING TRANSPORT |
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Resistance to the Motion of Conveyer Belt Arising when Passing Rollers Dependences of force of resistance to the motion of the conveyer belt for three-roller idler set from loading, a tension and the speed of belt are received as a result of computer modeling of system "bulk — the conveyer belt — rollers". Dependences of force of resistance to the motion of the conveyer belt arising when passing rollers from loading and tension, speed of belt and tension are rather precisely described by the polynomials of the second order, approximating the experimental dependences received as a result of computer modeling of the stress-strain state of elements of system "bulk — the conveyer belt — rollers". The obtained dependences can be used to create differential methodology of calculation of belt conveyors and then to substantiation the ways of regulation of speed and/or tension of the conveyor belt. P. 20—25 |
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DIAGNOSTICS |
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Justification of Rational Method of Control Parameters and Technical Condition of the Downhole Sucker Rod Pumping Units Analyzed statistics on the most frequent crash balancing pumping units and their causes. Proved promising way of instrument control parameters and diagnostics of pumping units on the basis of the analysis of the magnitude and nature of changes in load drive motors, determined by recording the instantaneous values of power consumption. The design and operation of the software and the registering complex "AKD-SK" scientific production enterprise "ROS" (Perm). Methodical bases of the analysis vattmetrogramm drive motors pumping units, describes the nature of the main manifestations of defects submersible pumps and balancing pumping units. P. 26—31 |
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ELECTROMECHANICS. AUTOMATION |
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Rationale for a New Way Overcurrent Protection on the Ground for Miner Electric Networks of 6...10 kV A new method of fault protection of ore in the ground-border networks of 6...10 kV. We present a theoretical justification of selective protection by controlling the negative sequence current and used as an input parameter to the operation of the protection increments controlled current distribution network of protected lines. The possibility of creating a high-performance protection for improved security and reliability of power supply of mining enterprises. P. 32—36 |
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RESEARCH AND DEVELOPMENT |
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Inclined Rope Hoist Balancing by Rail Guides with Concave Profile Inclined rope hoists balancing ways by rail guides with concave profile are considered. Additional balancing efficiency is ensured by reducing the maximum static load on the ropes and processes intensification of acceleration and deceleration hoist system. P. 37—39 |
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INFORMATION |
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Modern Hoisting Mining Equipment Trends According to the International Conference Hoist & Haul 2015 The presentations and papers review of key topics covered on the International Conference Hoist & Haul 2015 is described. The review shows the mining hoisting current state and it determines modern research main trends. P. 40—45 |
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