Method for panel ventilation in panel-block preparation system
SUBSTANCE: method includes air supply from main mines along panel transport mines to block transport mines to areas of mining works and removal of spent air from bottom hole through split chambers in block ventilation mines to panel ventilation mines further to main ventilation mines, at the same time part of spent air from panel ventilation mines through blocks, where treatment works are not carried out, recirculates to block ventilation and split mines, and also through block transport mines, to panel transport mines with the help of additional recirculating ventilation plants located on panel and block mines, where mining works are not carried out.
EFFECT: lower risk of contaminated air accumulation in mined-out space, provision of stable microclimate in areas of mining works and reduced costs for ventilation.
The invention relates to the mining industry and can be used for ventilation of the panel when the panel-block preparation system.
There is a method of ventilation of the mine, including air flow in the ventilation network of the mine's ventilation unit, at which air is sent for reuse in the ventilation network of the mine, which used a ventilation unit located inside the mine (U.S. Pat. 2119060 RF, MPK8E21F 1/00, publ. 20 09.1998).
The disadvantage of this method is the close location of the main fan installations and recirculation sboc, through which the partial direction of exhaust air for reuse. As a result, after these breakthrough there are leaks, and to the borders of a mine field, where the mining operation is underway, not receiving enough fresh air.
To eliminate this disadvantage will allow placement in these zboyco additional recirculation installations. As a result of their work will be eliminated leaks. However, due to the proximity of sbec with the main fan extra recirculation setting will work with low economic efficiency. This is because the recirculation fan system will work in protionamide with the main ve is tiscornia installation.
The known method of panel block preparation of a layer with blocks, working from the border of the panel to the main transport and ventilation drifts. In this scheme of ventilation includes panel ventilation drifts along the Central axis of the panel near the panel transportation roadway, block excavation-transport and ventilation drifts. The ventilation panel is to supply fresh air from the main travel roads on panel block transport workings to wastewater treatment stub and split cells, in a dead-end chamber air is supplied through local ventilation fans (VMP). From a dead-end block excavations exhaust air is removed through the cutting chamber at block ventilation workings panel ventilation elaborate further on the main vent production and ventilation shafts (Methodological guide to mining in the mines of the Verkhnekamskoe potash Deposit. / UV VNIIG. - M., Nedra, 1992. - P.56-57).
The disadvantage of this method is low efficiency and high cost of ventilation due to the accumulation of polluted air due to laminar motion of an air jet in the ways of leaks.
The technical result of the invention is to reduce the risk of accumulation zagryaznennogo the air (gas) in the exhaust space due to the turbulence of the air flow and, accordingly, to provide a stable comfortable microclimate in the areas of mining, as well as reducing costs for ventilation.
This technical result is achieved in that in the method of ventilation of the panel when the panel-block preparation system, including the air supply from the main travel roads for transport panel workings on the transport block generation to the mining and removal of used air from the bottom through the split camera on the block ventilation workings panel ventilation generation and next to the main vent production, with exhaust air from the panel ventilation openings through the blocks that are not being cleaned up, recycle on the block ventilation and split production, as well as through the transport block generation on the transport panel production with additional recirculation fan installations placed on the panel and block excavations, in which no mining operation is underway.
The essence of the technical solution is illustrated in the drawing, which is shown in the scheme of movement of air.
In the drawing: 1 - the main transport production (TLG); 2 - the main haulage tunnel (GOV); 3 - main ventilation generation (GW); 4 - panel transport production (PTV); 5 - panel haulage generation (PHS), 6 - panel ventilation you is abode (UIP); 7 - transport block generation (BTV), 8 - block haulage generation (BOV); 9 - block ventilation generation (BVV); 10 - split production (PB); 11 - treatment formulation (S); 12 - fan local ventilation (VMP); 13 - direction of mining; 14 - the direction of movement of fresh air; 15 - the direction of exhaust air; 16 - ventilation jumper, 17 - additional recirculation fan.
The method is as follows.
For ventilation of mine workings in the prepared blocks fresh air 14 from the main ventilation unit on 2 main haulage and transport 1 workings enters the transport block 7 production and next to mining in sewage generation 11 using local ventilation fan 12.
After airing sewage treatment works in mine workings, waste (contaminated) air is removed from the bottom through the cutting chamber 10. He further goes on block 9 and panel 6 vent production to the main ventilation workings 3 using the main ventilation unit (figure 1). Space mining and education waste (contaminated) air gradually, with the front of the treatment works, move the unit and the panel. Local ventilation fans move the together with the movement of the front of the sewage treatment works.
To improve ventilation longwall mining panel and block excavations, in which no mining operation is underway, additional post-recirculating ventilation unit 17 who work in cocurrent flow with the main fan installation. They are either in the area of the coupling block the ventilation generation 9 panel with ventilation generation 6 or in the region of the mating panel transport framing and panel cleaning elaboration 5. If it is one part of the exhaust air 15 going on panel ventilation elaboration 6 at the main vent production 3. The other part of air (recirculating air) due to the depression created additional recirculation fan installation 17, will go through the blocks in which no mining operation is underway, block the ventilation generation 9, split development 10, block transport development 7 on the transport panel production 4, where the recirculated air is mixed with fresh air stream. Recirculated air carries out the described movement due to the depression created recirculation fan installation 17.
To determine the location and type of fan recirculation fan installation determine the qualitative composition of the air coming out of istih workings, and concentration of pollutants in it. Based on these data, determine the amount of air that must be sent for recycling. By a special technique, which is the know-how of the present invention, expect air volume and location of fans to ensure adequate ventilation treatment workings.
Regulation of the quantity of recirculation air is carried out using a main fan installation (changing its performance), regulatory jumpers, recirculation fan installation (changing its performance) or a combination of these means.
It should be noted that the movement of air through the panel haulage formulation 5 can be either from the start panel to its borders and further panel ventilation workings, and from the borders of the panel to its beginning. In either case, to create directional airflow, you must use regulatory jumper 16.
Successful tests of this method were in the potash mine Verkhnekamsk potassium-magnesium salts.
The use of the invention reduces the risk of accumulation of polluted air (gas) in the exhaust space due to the turbulence of the air flow, respectively, provides a stable microclimate in place the mining operations and reduces the cost of airing due to the co operation of the fan units and reduce the complexity of work to erect and dismantle regulatory jumpers and reduce air leakage.
Method of ventilation of the panel when the panel-block preparation system, including the air supply from the main travel roads for transport panel workings on the transport block generation to the mining and removal of used air from the bottom through the split camera on the block ventilation workings panel ventilation generation and next to the main vent of development by means of the main ventilation unit, characterized in that the part of the air panel-ventilation openings through the block ventilation and split production, as well as through the transport block generation, which is not being cleaned up, recycle panel on transport development by means of the additional recirculation fan units installed in blocks in which no mining operation is underway.
SUBSTANCE: long blind drift ventilation method involves drilling of the main and additional wells in a pillar between adjacent and blind drifts; development of the cavity connecting the main and additional wells; air supply via the main well from fan or other draft source from adjacent drift to blind one; air ejection via additional wells from adjacent drift to blind drift. For more qualitative mixture of active (inducing) and passive (induced) jets the created cavity has bigger length and is made in the form of cone - diffuser.
EFFECT: increasing the jet head, flow continuity and its hydrodynamic stability, increasing system ejection coefficient.
SUBSTANCE: rock lining method involves erection of n-coal liner in filling mass from equal n-elements along helical spiral, installation of hollow guide template on bearing set prior to erection of filling mass, which repeats contours and clear sizes of development and the height of which is more than filling increment. At that, lining elements are laid on outer surface of template; after that filling mass is erected around liner; then template is lifted through one filling increment; sequence of operations is repeated till the liner erection is completed.
EFFECT: maintaining straightness of development liner during erection.
SUBSTANCE: method for ventilation of development entries by way of slanting horizontal wells bored from the surface involves delivery of fresh air into the well due to general shaft depression and discharge of the outgoing air stream along main entries and the well. The shaft of the slanting horizontal well bored from the surface is positioned within a protective pillar between coupled development entries being arranged; discharge of the outgoing air stream from the development faces is performed through the breakthrough closest to the faces that intercepts the well shaft and with the help of a vacuum pump installed on the surface at the well mouth.
EFFECT: provision for independent ventilation of coupled development entries and extraction faces and reduced scope of full-faced entries being arranged.
SUBSTANCE: invention refers to mining and can be implemented at development of mineral deposits with stowing mined space. Composition of stowage mixture containing milled granulated blast furnace slag, inert filler and water consists of the said acidic slag of fractions smaller, than 0.071 mm not less 90 wt %, as inert filler - wastes of concentration of wet magnet separation of ferrous quartzite containing fractions smaller, than 0.071 mm not less 90 wt %, additionally - super fluidising agent SP-1 at the following ratio of components, wt % said slag 22, said wastes 54.5, super fluidising agent SP-1 0.4 of slag contents, water - the rest.
EFFECT: raised strength, increased volumes of utilised anthropogenic wastes for considerable improvement of ecological medium.
1 ex, 2 tbl
SUBSTANCE: invention refers to mining and can be implemented at underground development of mineral deposits with stowing mined space. Stowage mixture contains, wt %: Portland cement or its milled clinker 1.4 - 13.68, milled zeolite rock 0.21-10.4, brine of 20÷105 g/l mineralisation, mainly of sodium chloride at temperature facilitating temperature of stowage mixture not below +15°C 14.9 - 26.96, fluidizing agent 0.01 - 0.3, filler - the rest. The invention is developed in dependant claims of the invention formula.
EFFECT: raised mobility and flowability of stowage mixtures, reduced shrinking at maintaining specified hardness, and reduced costs for nature conserving measures from negative effect of harmful salt saturated wastes of diamond extraction.
4 cl, 3 ex, 2 tbl
SUBSTANCE: shaft pneumatic bridging comprises pneumatic shell, suspension unit, protective jacket, manometric and air-supply hoses, device for filling, control of excessive air pressure and its ejection, mount cord. At the same time pneumatic shell is arranged in the form of soft axisymmetric toroidal shell of rectangular section, inside of which there is sleeve arranged, and along its axis there is pipe mounted in with diametre that is less compared to sleeve. Besides pneumatic shell is separated into two equal parts by means of perforated web, upper end and its side surfaces are coated by loose-fitting meshy web with lap towards working zone of rise heading, upper end is made of synthetic high-module fibre of high strength.
EFFECT: improved operational reliability of shaft pneumatic bridging.
SUBSTANCE: half-open course is arranged along chamber perimetre at the level of drilling crossdrift in interchamber pillars, and wooden lining is arranged in it as protruding with its dead part into stripped area of chamber. In discharge courses there are drain partitions installed, and hydraulic stowage finely dispersed material without binder is supplied through course into stripped chamber to the level of ventilation crossdrift. After drainage of water and setting of stowage massif from preserved half-open course along processed pillars there is a row of vertical and inclined wells drilled for the whole capacity of stowage massif, casing pipes are lowered from the surface of which into wells together with reinforcement rods, which protrude over the level of stowage massif. Afterwards the hardening solution is used to fill the following: at first, through wells - preserved half-open courses, then - the wells themselves, and lastly, upper part of chamber till its ceiling, which forms capping.
EFFECT: reduced consumption of binder.
SUBSTANCE: fresh air is supplied into mining face due to general shaft depression along two courses that delineate extraction pillar. It is discharged along course maintained behind mining face. In zones of active gas release of approximate beds, air impermeable throughput brattices are erected to form gas draining chamber. Part of stripped area adjacent to the latter is zone of methane trapping. Flow of air-methane mixture is formed. One part of flow is drained along gas-draining course into outward line of extraction site. The other one is discharged from stripped area outside the limits of extraction site. Between mining face and zone of maximum gas release of developed bed an additional throughput brattice is installed. The other part of air-methane mix flow is pushed aside in the area of impact of throughput brattices of gas draining chamber in direction of developed bed unloading zone arrangement. Flow of air-methane mix pushed aside is captured in wells for degassing. They are drilled in advance to form gas-draining chamber from maintained course into zone of developed bed unloading. Mouths are arranged behind project area, where gas draining chamber throughput brattice is erected. Bottoms are arranged in zone of maximum gas release of developed bed. Additional throughput brattice is initially installed in course maintained behind mining face in area, where its vertical plane matches vertical plane passing through point, which is projection of bottom in the well nearest to mining face for degassing onto ground of stripped area, and line being perpendicular drawn from specified point to the limit between maintained course and stripped area. As mining face advances, it is displaced in direction of extraction pillar development.
EFFECT: increased efficiency of methane removal, provides for the possibility to create reserve for increased load at bottom.
4 cl, 7 dwg
SUBSTANCE: facility consists of chute and auxiliary belt arranged under load bearing belt; said auxiliary belt has side edges projecting beyond borders of load bearing belt. Side edges of the auxiliary belt rest on horizontal damping rollers-supports at a section of load flow receipt; they rest on tilted re-loading rollers-supports at the section of re-loading. The facility is equipped with a frame with a vibrator; re-loading rollers-supports are rigidly fixed on the frame. By means of flexible elements the frame is installed on poles and can be vertically reinstalled.
EFFECT: reduced length and increased reliability.
2 cl, 4 dwg
SUBSTANCE: method of goaf stowing during underground development of steeply dipping thick ore bodies involves bottom-upward excavation of inclined ore streaks 5 in horizontal layers up to 8 m wide with the inclination angle equal to angle of dip of ore body starting from the hanging side towards the lying side, ore breaking to the mine goaf of the bed, loading of the broken ore from the mine goaf, installation of insulating bulkheads on the bed flanks and filling of the mine goaf with hydraulic stowing mixture 2. Before the mine goaf is filled with hydraulic stowing mixture 2, there built near exposed surface of the adjacent inclined ore streak 6 is concrete retaining wall 1 with the thickness taken depending on the bed width and the specified strength of wall 1. After the rest part of the mine goaf is filled with hydraulic stowing mixture 2 and water is filtered, injection of hardening - cement-and-sand solution is performed to its upper part to the depth of 100…300 mm for movement of self-propelled machines along the filling surface 4.
EFFECT: invention will allow decreasing the flow rate of hardening stowing mixture owing to the construction of concrete retaining wall and reducing the prime cost of the mine production.
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.