Method for dust and gas removal from dead stope ore
SUBSTANCE: method consists in the fresh air supply with ventilator into bottomhole zone and removal of air mixture contaminated with dust and gas from dead stope ore through the wells, which are drilled at regular times in interchamber pillar between the dead and worn stope ores. An interval between the wells doesn't exceed the distance of efficient offscouring of dust-gas mixture with draft source, mounted in the bottomhole space of the dead stope ore. Contaminated air is removed through the worn stope ore, broken into the haulage roadway, and then through haulage roadway. In this respect, the wells from worn stope ore neighbouring to the dead stope ore are preliminary drilled until the configuration of the dead stope ore. Well mouth in the dead stope ore is equipped with effuser, and the well mouth in the worn stope ore is equipped with a coupler connected to the ventilator aligned for the work in direction to haulage roadway. Ventilator is carried over to the well newly uncapped with combined machine.
EFFECT: lowering of air dustiness and reduction of combustive and poisonous gases in the dead stope ore.
4 cl, 2 dwg
The invention relates to the mining industry and can be used in underground mining to remove dust and hazardous gases from a dead-end workings, mostly in the chamber testing.
A known method of ventilation stub mining, including drilling of the previously completed production moving on it the fresh air in the ventilated dead-end production, installation in the previously completed through the development of local ventilation fan, connection with local ventilation fan rod flexible ventilation pipes, the construction of this rod through the hole in ventilated dead-end production and feed it fresh air, while the well after drilling to expand the cross-sectional area not less than the sum of the cross-sectional area of the pipes of the ventilation rate and the minimum cross-sectional area of the ventilation openings (Patent No. 2162946 of the Russian Federation from 22.03.1999, publ. 10.02.2001, bull. No. 4 (II)).
The disadvantage of this method is airing stub generation due to the injection of fresh air, i.e. dilution of polluted air. However, high concentrations of harmful gases in the atmosphere dead-end workings of their dilution to acceptable concentrations often technical the key is unreachable since in this case the amount of feed in the production of fresh air limit to the speed of its movement. For example, in the Verkhnekamskoe potash-magnesium salts (sub-surface) in the production of mining released hydrogen sulfide. The maximum allowable concentration of hydrogen sulfide in the atmosphere produce should not exceed 0,00071 volume percent (PB 03-553-03). When the maximum allowable air speed is also limited to four m/S. Therefore, to ensure proper dilution of this gas to MAC is often technically impossible.
Closest to the proposed invention is a method of removing dust and gas cleaning produce, including fresh air in the bottomhole zone of the source of thrust, creating a vortex circulation loop, one side of which is supplied with fresh air, while on the other side - the removal of contaminated air from the bottom zone, where the post 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 of a vortex loop with the following vortex contour are linkage, connecting mountain development, the subject treatment works, with waste chamber where installing an additional source of thrust, provided with a duct (patent No. 2392440 of the Russian Federation dated 27.04.2009, publ. 20.06.2010, bull. No. 17).
The disadvantage of this method is the necessity of sinking mezhdurebernyh of sboc through Mezhdunarodnye pillars. In this case, along with a decrease in the bearing capacity mezhdurebernyh pillars slaughter at a certain time will be far enough away from breakthrough (until you have the opportunity to go new works, i.e. the efficiency of ventilation is reduced.
The technical result of the invention is to reduce the dust content and the concentration of combustible and toxic gases in a cul-cleaning formulation, which is blasting and transportation smitten rock mass, and, accordingly, improvement of sanitary and hygienic working conditions of miners.
This technical result is achieved in that in the method of removing dust and gas from a dead-end cleaning produce, including fresh air in the bottomhole zone of the fan with fresh air in the bottom zone on one side of the treatment stub generation, and directly in the bottomhole formation zone, place the source of thrust, which forms a directed flow of air contaminated with dust and gas along the wall of the treatment stub generation, across the lagoon to the false jobs of miners, when this treatment stub generation connect with neighboring wastewater treatment development, which establish an additional source of thrust, the mixture contaminated with dust and gas of the air removed from the stub cleaning production through wells that are drilling periodically in mezhdunarodnom the pillar between the stub and wastewater treatment workings, the distance between the wells does not exceed the effective range of garbage dust-gas mixture source of thrust, installed in the wellbore space stub cleaning formulation, and the contaminated air is removed through the waste treatment production, brought down from the ventilation passage, and further on the ventilation drift.
Wells are drilled from pre wastewater treatment develop adjacent to the stub of the treatment development, to the design of the circuit stub cleaning formulation, with the wellhead in a cul-cleaning formulation equip confuser, and the wellhead in the waste treatment development will be equipped with an adapter, which connects with the fan oriented to work in the direction of the ventilation passage, and a fan transferred to the newly opened combine well.
The essence of the invention is illustrated by drawings, where figure 1 - General scheme of ventilation cleaning deadlock in the processing; figure 2 - node A.
In the drawings denote: 1 - at the same time stub generation; 2 - waste treatment development; 3 - well; 4 - Mezhdunarodny pillar; 5 - confuser; 6 - adapter; 7 - local ventilation fan; 8 - vent drift; 9 - an additional source of ventilation draught; 10 - vent pipe; 11 - local ventilation fan for filing in the production of fresh air; 12 - slaughter; 13 - polluted air; 14 - fresh air, 15 - harvester.
The method is as follows.
Treatment stub generation 1 and waste treatment production 2 connect the 3 wells drilled through Mezhdunarodny pillar 4 (figure 1).
Well 3 Buryats of the pre-waste treatment production 2 adjacent to the treatment stub generation 1, to the design of the contour of the treatment stub generation, and then open as podvigina slaughter. Wells are drilled through a certain distance periodically, mezhdunarodnom the pillar between the stub and wastewater treatment workings. The distance between the wells does not exceed the effective range of garbage dust-gas mixture source of thrust, installed in the wellbore space stub cleaning formulation. Wells can be drilled at a convenient height mezhdunarodnogo pillar.
The distance between the wells take depending the spine from power an additional source of draught 9, it corresponds to the range of garbage from his dust-gas mixture. The calculation method is the know-how of the invention.
At the mouth of the bore 3 in the treatment stub generation 1 set the confuser 5, and in the wellhead to the treatment of waste generation 2 adapter 6, coupled with local ventilation fan 7 is installed in the treatment of waste generation 2, whisked with ventilation passage 8 (Figure 2).
In the bottom space of the treatment stub generation 1 establish an additional source of ventilation draught 9, the guide-contaminated dust and gas of the air flow in the direction of the confuser 5. An additional source of ventilation draught 9 can be installed directly on the processor 15, and in the treatment stub generation 1, between running harvester 15 and opened by the well 3, the wall opposite the jobs of miners. In the treatment stub generation 1 establish an additional source of ventilation draught.
Fresh air 14 flows into the bottom space of the treatment stub generation 1 vent pipe 10 from local ventilation fan 11 mounted outside the dead-end of the treatment formulation. Further, fresh air washes the face 12 and thins powder-gas mixture. An additional source of ventilation draught 9, posted in PR is downhole, directs the contaminated air 13 to the confuser 5, installed in the opened well 3, located near the bottom 12. In the waste treatment formulation 2, whisked with ventilation passage 8, the adapter 6 in the well mounted local ventilation fan 7 and Orient it to work in the direction of the ventilation passage 8, and the fan is transferred to the newly opened hole. Next polluted air 13 through the confuser 5 and a pipe secured in the bore 3, is delivered to the local ventilation fan 7.
From waste treatment production 2 polluted air 13 is removed by a ventilation passage 8, and then through mine depression issue on the surface.
The process of removing contaminated air from the bottom using a well drilled at a convenient height wall framing place and which is near the bottom, but the equipment of the well will not interfere with the operation of the harvester. When podviganiya slaughter equipment is well tolerated after slaughter to the next well.
The proposed method will improve sanitary and hygienic conditions of work miners due to the intensification of removal of dust-gas mixture from the bottom stub of the treatment formulation.
1. Method of removing dust and gas from a dead-end cleaning produce, including fresh without the ha in the bottomhole zone of the fan, with fresh air in the bottom zone on one side of the treatment stub generation, and directly in the bottomhole formation zone, place the source of thrust, which forms a directed flow of air contaminated with dust and gas along the wall of the treatment stub generation, opposite the jobs of miners, with clean-stub generation connect with neighboring wastewater treatment development, which establish an additional source of thrust, characterized in that the mixture of contaminated dust and gas of the air removed from the stub cleaning production through wells that are drilling periodically in mezhdunarodnom the pillar between the stub and wastewater treatment workings, the distance between wells does not exceed the effective range of garbage dust-gas mixture source of thrust, installed in the wellbore space stub cleaning formulation, and the contaminated air is removed through the waste treatment production, brought down from the ventilation passage, and further on the ventilation drift.
2. The method according to claim 1, wherein the pre-drilling of wells from wastewater treatment develop adjacent to the stub of the treatment development, to the design of the circuit stub cleaning output.
3. The method according to claim 1, wherein the wellhead in a cul-cleaning exp is the development of tools confuser.
4. The method according to claim 1, wherein the wellhead in the waste treatment development will be equipped with an adapter, which connects with the fan oriented to work in the direction of the ventilation passage, and a fan transferred to the newly opened combine well.
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
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.
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.