Method for dust and gas removal from stope ore
SUBSTANCE: method consists in clean air supply into the bottom hole and removal of contaminated air from the bottomhole zone. In this respect, the configurations of circulating air swirling motion are built up. For this purpose, the worn chambers are broken into the airway. In this respect, the additional draft source, mounted in the worn chamber, is aligned for work in direction to the airway, and the mix of fresh air with the airflow contaminated with dust and gas is removed through the worn chamber and airway. In this respect, fresh air is directed to workable stope ore through the haulage roadway or by means of additionally installed ventilation draft source with air feeder, which end is placed in the working chamber, or by means of the adjusting airway stoppings, one of which is mounted on the haulage roadway on the way of air current motion between the working and worn chambers, and the other one is mounted at the mouth of worn chamber, placed in axial alignment with developed stope ore, which is gone away from it through the haulage roadway.
EFFECT: gain in air supply performance.
6 cl, 2 dwg
The invention relates to the mining industry and can be used for ventilation treatment, mostly stub, workings.
There is a method of natural ventilation stub mining large extent due to the circulation of the vortex motion (Krasnostein AU, feinburg GS Diffusion-network methods for calculating the ventilation of mines. / Ekaterinburg, 1992, ch.7, §7.1, p.148-164, RIS).
The disadvantage of this method is the lack of stimulation of ventilation along the entire length of the stub generation.
Closest to the proposed invention is a method of removing dust and gas from production while cleaning chamber-and-pillar system of mining, including the flow of clean air into the bottom zone of the source of thrust, creating a vortex circulation loop, one side of which is supplied with clean air, and on the other side - the removal of contaminated air from the bottom zone and critical zone place the source of thrust, which creates the first circuit circulation of the vortex motion and generates a directed flow of air contaminated by dust and gas along the walls of the excavation, opposite the jobs of miners, while at the connection point of the first circulation vortex loop with the following whirl the second circuit held the linkage, connecting clean production with waste chamber where installing an additional source of thrust, oriented to work in the direction of the ventilation passage, and which may be provided with a duct (patent No. 2392440 of the Russian Federation, publ. 20.06.2010, bull. No. 17).
The disadvantage of this method of dust removal and gas cleaning production is low efficiency control the air flow in the case where the used camera off the ventilation drifts block (BSC) or panel (PBS) with appropriate training system.
The technical result of the invention is to improve the effectiveness of ventilation by removing dust and gas from the cleaning formulation, in which people work, and the elimination of air leaks through the exhaust chamber, when the linkage with ventilation workings.
This technical result is achieved in that in the method of removing dust and gas from the cleaning formulation, including the flow of clean air into the bottom zone of the source of thrust, creating a vortex circulation loop, one side of which is supplied with clean air, and on the other side - the removal of contaminated air from the bottom zone, in which is placed a source of thrust that makes the first loop circulation vikhreva what about the movement, and form a directed flow of air contaminated by dust and gas along the walls of the excavation, opposite the jobs of miners, while at the connection point of the first circulation of a vortex loop with the following vortex contour are linkage connecting the clean production with waste chamber where installing an additional source of thrust with duct exhaust chamber off the ventilation drift, while an additional source of thrust, installed in the waste chamber, oriented to work in the direction of the ventilation passage, and a mixture of fresh air with a stream of air contaminated with dust and gas, are removed through the empty chamber and the vent passage, this fresh air is directed into the working clean production transport roadway or through an additional set of source ventilation traction with the duct, the end of which is located in the working chamber, or by means of regulating the ventilation of jumpers, one of which is installed on the transport passage along the path of movement of the air flow between the working and tested cameras, and another set at the mouth of the waste chamber located coaxially working on cleaning formulation, separated from her through the transport passage.
A ventilation passage formed by the ore of podvigina treatment works diagonal linkage of the cleaning formulation through an elaborate camera to the design contour of the ventilation drift, ensuring cross ventilation with subsequent formation ventilation drift until the next cleaning formulation. Form a directed flow of air with dust and gases include additional source of ventilation thrust, located in the waste chamber. Form a directed flow of the mixture of fresh air with the air flow, contaminated dust and gas, the inclusion of an additional source of ventilation thrust, located in the linkage between sewage generation and waste chamber and oriented to work in the direction of the ventilation drift. Additional sources of traction supply duct. The linkage between the exhaust chambers, and in the waste chamber, adjacent to longwall development, in the area between her mates with the transport passage and the linkage between the treatment formulation install ventilation jumper.
The essence of the invention is illustrated by drawings, where figure 1 - scheme of ventilation cleaning formulation (bottom zone stub generation), figure 2 - ventilation scheme longwall production at the breakthrough treatment workings between the formation of the ventilation drift.
In the figures denote: 1 - transport and drift; 2 - fresh air; 3 - mixture flows fresh and polluted air; 4 - jobs miners; 5 - linkage; 6 - directional flow of air with dust and gas (the first circuit); 7 - samochody the second carriage; 8 is a conveyor hopper; 9 - harvester; 10 - source of thrust; 11 - treatment development (stub generation); 12 - proven camera (through output); 13 - an additional source of thrust; 14 - duct; 15 - vent drift; 16 - source ventilation rod with duct; 17 - regulating ventilation jumpers, 18 - ventilation jumper.
The method is as follows.
From the mouth of the longwall 11 to generate breakthrough 5 fresh air reaches 2 as either due to mine the depression created by the fan of the main airing, and by regulating the ventilation jumpers 17, or by an additional source of thrust supplied by the duct 16, either through joint combinations regulating ventilation jumpers 17, an additional source of thrust supplied by the duct 16, and mine depression created a main fan installation.
Eliminating possible leakage of fresh air 2 transport passage 1 can be achieved either by setting the source vent rod with duct 16, such as local ventilation fan (VMP) with the duct, or by regulating the ventilation jumpers 17 that overlap the cross-section of the transport passage 1, and the waste chamber, the opposite of the treatment formulation. This one is of the jumper installed on the transport passage 1 through the path of movement of the air flow between the working 11 cleaning and waste cameras and may have a passage for people and traffic (for example, the door)and the other at the mouth of the waste chamber located coaxially working on cleaning formulation, separated from her through the transport passage. Thus the flow of fresh air 2 fully directed to the treatment formulation 11, bypassing where it leaks.
It is possible to avoid air leaks blend of the joint application of regulatory crosspieces 17 and local ventilation fan (VMP) with the duct 16.
In the area of the breakthrough 5 of the fresh air goes through the jobs of miners 4 to the bottom where the spring thrust 10 issued a directed flow of air with dust and gas 6 and generates a first circulation of the vortex path. The other part of the fresh air 2 together with the directional flow of air contaminated with dust and gas 6, enters the linkage between 5 longwall production 11 and the waste chamber 12. In the linkage 5 is a mixture of fresh air 2 with polluted stream 6 and dilution up to sanitary standards with hazardous components below the established norms in the total mixture 3.
To enhance the management of air exchange in the linkage between 5 longwall production 11 and the waste chamber 12 allows the use of an auxiliary source rod 13.
In the case when the sewage generation 11 straight off the ventilation passage 15 (Fig 1), additional East is CNIC rod 13, which may be provided with a duct 14, is installed in the waste chamber 12, is oriented to work in the direction to the vent develop and intensify the destruction through the linkage of the 5 mixture of air streams contaminated with dust and gas 6, and fresh air 2, the waste chamber 12 or through the duct 14 and further on the workings ventilation ventilation shaft.
If the ventilation passage 15 is formed due to the beating treatment openings 11, as podvigina treatment works diagonal linkage at the end of the cleaning formulation through an elaborate camera to the design contour of the ventilation drift (figure 2), the additional source rod 13 may be placed in the waste chamber 12 when the focus or direction of the ventilation drift (it can be equipped with a duct), and the area of the breakthrough between the exhaust chambers 5 are installed ventilation jumpers 18, which prevents the recirculation of the air flow in the exhaust chambers 12, or an additional source rod 13 (which can also be supplied the duct is installed in the linkage 5 and oriented to work in the direction from the cleaning formulation 11 in the side adjacent the waste chamber 12, in this case the jumpers 18 not need any additional source rod 13 without Vostokova is and placed in the linkage between 5 longwall production 11 and the waste chamber 12 and oriented to work in the direction from longwall production 11 used cameras 12 and establish regulatory ventilation jumper 17. Thus, if the fan 13 provided with a duct 14, the vent jumper 18 in the linkage between the exhaust chambers 12 and into the waste chamber 12 is not needed, and if the duct 14 is no, you need adjustable ventilation jumper 17 (figure 2).
The mixture of air flow 3 should workings ventilation ventilation shaft.
After sinking diagonal sboc and provide cross ventilation to form the vent passage to the design contour regular cleaning of production.
Aerodynamic parameters of the sources of thrust (VMP) 10, 13 and 16 with duct expect depending on mining conditions, the gas-bearing strata and used mining equipment. The auxiliary power supply rod 13 is placed in the waste chamber 12 or in the linkage of the 5 in a technologically convenient location, and it may be provided with a duct through which removes the contaminated air flow in the ventilation passage 15.
The expediency of application of regulatory jumper 17, its aerodynamic permeability, and the use of local ventilation fan (VMP) with the duct 16 and the depth of the plant's air duct to the treatment formulation 11 is determined by the gas-bearing layers and parameters of the equipment used.
The need to use and the lengths of the duct 14 is also determined by the calculation based on the gas-bearing layers and parameters used mining equipment.
Calculation methods sources of thrust 10, 13 and 16, and the length of the ducts and the depth of their plant production (cameras) are know-how of the invention.
On the potash mine conducted a successful test of the proposed method of ventilation.
The proposed method allows to intensify the ventilation in the mine workings at the junction of the circulation of the vortex paths in which there is a mixture of dust and gas clouds, as well as to eliminate leakage of fresh air in the transport drift. In addition, the proposed method of ventilation can improve sanitary and hygienic conditions of work miners.
1. Method of removing dust and gas from the cleaning formulation, including the flow of clean air into the bottom zone of the source of thrust, creating a vortex circulation loop, one side of which is supplied with clean air, and on the other side - the removal of contaminated air from the bottom zone, in which is placed a source of thrust that makes the first loop of the circulation of the vortex motion and forming a directed stream of air contaminated by dust and gas along the walls of the excavation, opposite the jobs of miners, while at the connection point of the first qi is colalongo vortex loop with the following vortex contour are linkage, connecting clean production with waste chamber where installing an additional source of thrust with the duct, wherein the exhaust chamber off the ventilation drift, while an additional source of thrust, installed in the waste chamber, oriented to work in the direction of the ventilation passage, and a mixture of fresh air with a stream of air contaminated with dust and gas, are removed through the empty chamber and the ventilation drift, while fresh air is directed into the working clean production transport roadway or through an additional set of source ventilation traction with the duct, the end of which is located in the working chamber, or by means of regulating ventilation jumpers, one of which is installed on the transport passage along the path of movement of the air flow between the working and tested cameras, and another set at the mouth of the waste chamber located coaxially working on cleaning formulation, separated from her through the transport passage.
2. The method according to claim 1, characterized in that additional sources of traction supply duct.
3. The method according to claim 1, wherein the ventilation passage is formed as podvigina treatment works diagonal linkage of the cleaning formulation through an elaborate camera to PR the flash circuit of the ventilation drift, ensuring cross ventilation with the subsequent formation of the ventilation drift until the next cleaning output.
4. The method according to claim 1 or 2, characterized in that forming a directed stream of air with dust and gases include additional source of ventilation thrust, located in the waste chamber.
5. The method according to any one of claims 1, 3, characterized in that forming a directed stream of a mixture of fresh air with an air stream contaminated with dust and gases include additional source of ventilation thrust, located in the linkage between sewage generation and waste chamber and oriented to work in the direction of the ventilation drift.
6. The method according to claim 1 or 3, characterized in that the linkage between the exhaust chambers, and in the waste chamber, adjacent to longwall development, in the area between her mates with the transport passage and the linkage between the treatment formulation install ventilation jumpers.
SUBSTANCE: development is performed during winter period. First, vertical through wells with diameter of 0.5-0.6 m are drilled from surface above developed mine field, through which ice-water mixture is supplied; ratio of solid phase to liquid phase is 1:3 by volume. Filling mass is erected layer by layer; at that, each layer is frozen with forced blowing using cold atmospheric air from blowdown fan. Thickness of a single layer |Nlayer| is determined from the following ratio: Nlayer=1.5|tamb.|-20, cm, where: 1.5 and 20 - constant coefficients; |tamb| - absolute monthly average ambient air temperature of months during winter period, °C.
EFFECT: invention allows reducing the time required for stowing operations and improving the stowing quality.
SUBSTANCE: method involves fresh air supply through shafts into tunnel and contaminated air removal through other shafts from tunnel using forced ventilation. Cross section of each shaft is separated into two parts having independent connection to the tunnel in which a gate is installed between such connections. Tunnel is closed by means of the above gate when there are no trains moving in it. Air flow via tunnel is arranged at the interval between train movement in directions allowing to reduce the time required for removal of contaminated air from the tunnel. At that, selection of air flow direction is determined considering the length of sections filled with fresh air supplied to the tunnel as a result of suction effect action. Amount of fresh air supplied to each section filled with contaminated air is determined by the formula.
EFFECT: reduction of forced ventilation volumes at fixed time interval between trains, reduction of time required for tunnel cleaning from contaminants after every train passes through tunnel, and increase in tunnel capacity.
SUBSTANCE: in a computerised control unit all transportation routes are registered available in an underground network of mine tunnels, including their status data affecting efficiency of transportation, and also transport means and transport reservoirs moving along transportation routes with related efficiency date and appropriate underground and aboveground locations, and also with their appropriate schedules, and at the same time the control unit for transportation processes to be performed with account of weight and dimensions subject to cargo transportation automatically generates a travel route and a schedule for the selected vehicle related with the appropriate working situation identified from the registered data, and sets up running schedules for automated unmanned vehicles or sends to service personnel of a communication facility of the selected vehicle.
EFFECT: optimisation of underground and aboveground transportation processes and higher reliability of supporting underground usage and consumption areas.
SUBSTANCE: method includes supplying pulp under excessive pressure via a safety device. The safety device is arranged as a tee, one end of which is connected to a bottomhole pulp line, the second one - to a sealer, and a safety membrane is installed on the third one. At the same time the output of wells in the backfilled chamber is arranged near its roof.
EFFECT: higher extent of chambers filling with a backfilling material with reduction of labour costs.
2 cl, 7 dwg
SUBSTANCE: method includes layer filling of a mine with a backfilling material. The backfilling layer in the form of a cylindrical concrete block is previously made on the surface in an autoclave chamber. Concrete blocks are made with a cylindrical groove, at the same time the upper and lower surfaces are arranged as truncated. Installation of cylindrical concrete blocks in the shaft is carried out onto a hydraulic insulation putty. A gap between mine walls and blocks is solidified with a shrinkage-free water-resistant hardening concrete mix.
EFFECT: development of a water-resistant and shrinkage-free backfilling massif in a vertical mine to the moment of its backfilling completion.
2 cl, 3 dwg
SUBSTANCE: ejector comprises a diffuser, two serially installed receiving heads with receivers connected by a hollow cylinder, with two outlet slots and gaskets each having holes. At the same time the main outlet head is equipped with a confusor receiving nozzle. The last flange of the second receiving head may be an anti-deformation flange.
EFFECT: provision of ejector operation for high aerodynamic resistance.
2 cl, 1 dwg
SUBSTANCE: method to increase stability of a ceiling in downward slicing development of a deposit with backfilling includes serial tunnelling and backfilling of parallel mines - stope entries, leaving ore pillars with width equal to one, two or three spans of mines, backfilling of mines with a concrete mix, and after backfilling hardens, ore pillars left between concrete strips are mined. At the same time the vault of stope entries is arranged as deep, besides, ore pillars are left in the roof between concrete backfilling of adjacent stope entries.
EFFECT: higher stability of a mine ceiling.
SUBSTANCE: method involves collection of underground water to manifold (17) around development zone (26) of ore (8) deposit (7) so that cone of depression (27) is formed owing to operation of rings (14) of upward discharge wells (15) drilled out of drain annular mine working (6). Inflow is supplied from manifold (17) of mine working (6) by gravity via pipeline (18) of development mine working (4) to sump (19) of well shaft (1) for cleaning and accumulation. Then, some part (28) of accumulated inflow is supplied by means of pump (22) of well water drainage via pipeline (21) to surface (9) into closed pipeline (20), and from it to water bearing horizon (3) through pumping wells (10) pre-drilled from surface (9) within cone of depression (27), thus providing such pumping mode that pumping flow rate Q3 is less than pumping-out flow rate Q0, and heads H3 of underground water in the propagation area of pumped water are less than heads H0 out of this area, i.e. they provide the compliance with conditions Q3<Q0 and H3<H0.
EFFECT: providing environmentally safe utilisation of technogenic drainage water.
1 ex, 6 dwg, 1 tbl
SUBSTANCE: control method of delivery of broken-rock pile extracted with getting machines operating at underground mine working at different points of a network of underground gains of the well, by means of transportation devices and bunker units, which are located in the network of underground gains of the well; at that, on the basis of actual data being recorded continuously, there determined is minimum allowable capacity of transportation devices and buffer capacity of bunker units and compared in the computer-aided control unit to current actual production rate and/or to the specified production rate expected for the specified time period and/or to the specified production rate of the associated getting machine, which is extrapolated as per the previous actual data; and at that, at the specified deviations the control unit implements automatic levelling of carrying capacity with transportation devices and bunker units and/or controls the production rate of the getting machine considering the capacity of in-series connected transportation devices and bunker units.
EFFECT: providing maximum and, when possible, constant product available at the transportation point of the mine.
SUBSTANCE: chute includes two sides, longitudinal stiffness flange and a bottom. One of the sides is located below the other one as to height. Opposite side has the height which is larger than lifting level of the transported hydraulic mixture. Longitudinal stiffness flange of the shortened side is made in the form of inclined chute.
EFFECT: possibility of controlling the overflow when the chute is overfilled.
FIELD: mining industry.
SUBSTANCE: pipeline has sections made in form of hermetically interconnected outer and inner covers, mounted with space relatively to each other, and main ventilator. On different ends of pipeline flow meter and additional ventilator are mounted, the latter having adjustable characteristics and being connected to inter-pipe space by branch pipe. In inner cover apertures are made placed along radius and along length of cover. Air comes from apertures to air channel and forms additional air flow near walls of inner cover, which lowers or heightens aerodynamic resistance of ventilation pipeline.
EFFECT: higher efficiency, higher safety, lesser costs.
FIELD: oil and gas extractive industry.
SUBSTANCE: method includes use of device providing for manufacturability of assemblage of casing and drilling columns and concurrent drilling by two columns, provided with independent drives, and drilling, by casing column, of non-stable rock solids performed with frequency no greater than one calculated from formula
where Vmec - mechanical drilling speed, m/min, Fr - friction forces against rotation, Ften - friction forces against linear displacement, R - casing column radius, m, α - angle between vectors of directions of linear and rotating movements.
EFFECT: higher effectiveness, higher productiveness, higher reliability.
2 cl, 5 dwg, 1 ex
FIELD: mining industry.
SUBSTANCE: method for extraction and underground use of coal includes cleaning extraction and dumping of coal, fixing and controlling ceiling and transporting coal along face to drift. On the drift, in moveable generator, coal is pulverized for intensive burning with use of jets in water boiler firebox, where high temperature of steam is achieved (about 1400 C°), enough for decomposition of water on oxygen and hydrogen. These are separated, then oxygen is fed back to jets, and hydrogen is outputted along pipes and hoses in drifts and shaft. Variants of underground generator for realization of this method are provided. Also provided is method for extraction of disturbed coal beds by short faces. It includes extraction and dumping of coal on face conveyor, fixing of ceiling behind combine, moving conveyor line and support sections in direction of cleaning face displacement, control of ceiling with destruction and partial filling. Extraction of coal is performed in short curvilinear faces by long stripes along bed, in straight drive without forwarding drifts, with preservation and reuse of ventilation and conveyor drifts, equipped with mounting manipulator robots, with fixing behind combine by automatically operating support deflectors without unloading and displacing sections in area of coal extraction. Extraction and transporting of coal is performed by fast one-drum combine and curvilinear reloading conveyor, supplying coal to drift conveyor or immediately to underground gas or energy generator placed immediately on drift. Also proposed is face scraper conveyor for realization of said method, wherein pans are made with step along front face profile, greater, than along back one, while forming common line curved towards face with constant curvature. Also proposed is a method for controlling complex for unmanned coal extraction.
EFFECT: higher efficiency, effectiveness, broader functional capabilities.
8 cl, 5 dwg
FIELD: gas, oil, oil refining and other industries.
SUBSTANCE: invention relates to building and operation of underground reservoir in stable rocks, for instance, soluble salt deposits. Method includes delivery of water and putting out brine along water feed and brine lifting pipes placed one inside the other, charging and storing of gas in underground reservoir. After brine lifting, reservoir is dried and then is filled up with alternating layers of absorbent and inert porous material, volume ratio 2:1, delivered along clearance between water feed and brine lifting pipes. Brine lifting pipe is perforated in lower part in height of reservoir and it is installed in lower part of reservoir. Difference between angles of repose of absorbent and inert material does not exceed 10 degrees. This done, reservoir is filled with gas delivered along perforated brine lifting pipe.
EFFECT: increased productive volume of reservoir owing to sorption of gas on surface of absorbent, reduced cost of gas storing.
FIELD: mining industry.
SUBSTANCE: invention can be used for transportation of rock in underground mines for reloading of rock from one conveyor to the other installed at one level. For this purpose device is used containing pair of flight conveyors, forced-draught and suction fans, air chamber with air inlet hole provided with cyclone installed over flight conveyor to be loaded. Air chamber is arranged between conveyors and is furnished with air collector made in form of screen with cells, housing and brushes from side of conveyors. Additional hole is made in bottom of air chamber to deliver air jet at angle to direction of material movement.
EFFECT: device of simple design providing effective and safe reloading of rock from one conveyor to the other installed at one level.
FIELD: mining industry.
SUBSTANCE: method includes use of screw-drilling machine for driving of several first ventilation shafts in ore body and driving several second shafts, while second and each second shaft crosses, at least, one matching first shaft, forming first support walls, supporting ceiling. First supporting ceilings consist of ore body zones between neighboring second shafts, each first support wall has portion of at least one first shaft, passing horizontally through it. Horizontal channels are formed, each of which is placed transversely to matching second shaft between appropriate portions of first shaft, formed in adjacent support walls, for forming of group of continuous ventilation shafts. Second shafts are filled for forming second supporting walls, supporting well ceiling, and first supporting walls are extracted. First ventilation shafts can be made parallel to each other. Second shafts may be directed perpendicularly relatively to first ventilation shafts. In ore body air-outlet and air-inlet ventilation mines can be formed, placed at distance from each other along horizontal line, while first or each first ventilation shaft passes through portion of ore body between air-inlet and air-outlet ventilation mines. Driving of second or each second shaft can be performed by cutting machine, or by drilling or explosive mining.
EFFECT: higher efficiency.
7 cl, 11 dwg
FIELD: mining industry.
SUBSTANCE: method includes partial filling of extracted space of side and central mains by filling stripes from lava extracting shafts. At center of semi-lava on the side of massive, wherein next extractive column will be cut, filling shaft is additionally driven, wherefrom full filling of space between central fill stripe and fill stripe on the side of massive is performed. Preparation of next extraction column is performed under protection of erected fill stripes.
EFFECT: higher safety, higher efficiency.
FIELD: mining industry.
SUBSTANCE: method includes erection of rows of main platforms along bed length in staggered order with length equal or divisible by step value for support displacement, and placing filling material thereon. Along length of main platforms between ceiling and bed soil post support is mounted, upon which filling material is fed. After that between main platforms additional platforms are erected with wedge supporting, and main platforms are rotated counter-clockwise towards pneumatic support and it is displaced for one drive step. During that filling material, while lowering, unwedges wedge support between ceiling and bed soil and forms artificial supports. After that additional platforms are rotated counter-clockwise towards pneumatic support. After movement of cleaning face for two drive steps operations for constructing artificial supports are repeated. Distance between main platforms along bed fall line are selected from mathematical expression.
EFFECT: higher efficiency.
FIELD: mining industry.
SUBSTANCE: invention relates to vibrating facilities and it can be used for letting out ore or other materials and their separation. Proposed vibrating feeder has resilient supports, working member consisting of charging and discharge parts and vibrating drive consisting of two shafts with unbalance weight and motors, one per each unbalance weight. Place of arrangement of vibrating drive is determined basing on the fact that line of connection of axles of unbalance weights is located in area limited by two straight lines square to direction of vibration, one of which passed through center of mass, and the other is located at a distance from center of mass of 1/10L to side of charging part of working member. Axle of unbalance weights are located at different sides from line of direction of vibration passing through center of mass at distance equal to not less than 1/8 where L is distance between resilient supports in horizontal direction.
EFFECT: improved stability of operation of vibrating feeder at unstable supply and impact loads on working member at discharging.
FIELD: mining industry.
SUBSTANCE: method includes preparation and well extraction of resources of chambers with partial backfill of extraction space. Blocks of upper level relatively to blocks of lower level are placed in staggered order, while blocks are made in form of a stretched upwards hexahedron. Resources of block within one hexahedron are separated on two chambers, one of which, placed along periphery of hexahedron, after extraction and removal of ore from it is filled by hardening backfill. Second order chamber is made of hexahedron-like shape, extracted and removed under protection from artificial block on all six sides of this chamber. Removal of ore from first order chambers is performed through one removal mine - end of level ort and cross-cut in lower portion of block and intermediate sub-level cross-cuts.
EFFECT: higher efficiency.