Method of mineral deposits mine development which are dangerous according to gas dynamic and geodynamic phenomena
SUBSTANCE: in the face the gas flows are separated from the explosive dust, the isolated production is prepared, isolating it from the worked out area of the face with an abutment with a manhole and a bulging shockproof damper. The nozzle of the suction gas pipe is fixed to the roof at the mine face, and the nozzle of the dust duct is installed in the lower part of the worked out space on its soil. Fans of local ventilation are turned on for the suction from the face, for the suction to the isolated working, where, together with mixing gas flows with mine dust, gas-saturated dust and coal briquettes are produced, mixing the mineral deposits detrital products and surrounding rocks, compacting them with pressure. The strength of the resulting briquettes is increased by the addition of binders, for example petroleum bitumen, and the resulting mixture is extruded through the calibration holes into the briquette container. The briquettes are then dried and sealed.
EFFECT: prevention of explosions of gas and mine dust generated during mining operations and excavating by modern high-performance complexes, the use of these gases and dust for the energy-intensive briquettes manufacture and the elimination of emissions of harmful substances into the atmosphere.
FIELD: mining operations.
SUBSTANCE: invention relates to the coal industry and can be used in the preparation of coalmine methane for recovery by different consumers. A unit for the preparation of coalmine methane for recovery is proposed, containing a moist separator, a filter of wet cleaning the gas, the control devices of methane content in the gas mixture and pressure, a mixer, a devices of protection against emergency regimes, the pipelines of supplying the gas mixture and the captured gas and the control system of methane concentration with the gas analyser and the gas concentration controller, the primary damping container mounted in the supply line of the captured gas in front of the mixer, and the secondary damping container mounted downstream of the mixer in the supply line to the consumer of the gas mixture, the inlet pipeline with an air inlet, a gas analyser connected to the gas concentration controller, an odorator connected to the mixer and the gas concentration controller by the regulating valve, a pressure regulator-stabiliser, and the additional control valves, and a shut-off valve mounted on the inlet pipeline between the air inlet and the mixer. In addition, the unit is provided with a cassette with the separation membranes mounted between the injection and the discharge pipelines, and has the ventilation device connected to the gas pipeline for methane-air mixture intake from the shaft, at that the moist separator, the filter of wet cleaning the gas are mounted in front of the cassette with the separating membranes.
EFFECT: increasing the efficiency of operating unit of the preparation of coalmine methane for recovery, by providing the ability of preliminary separation of recyclable captured methane-air mixtures, and improvement of safety of the unit operation.
SUBSTANCE: invention relates to mining industry and can be used for mining. The method of methane capture during mining of coal layers by a power mining complex comprises the mining of a coal layer using the sections of a powered roof support with box-shaped top covers of a face conveyor and combine. Simultaneously with coal extraction, transportation through a face and preparatory developments, through the holes in the box-shaped top covers and telescopic branch pipes methane is pumped out. From a production face all box-shaped top covers of sections are joined among themselves with corrugated branch pipes of a certain length equal to an advance increment of the powered roof support.
EFFECT: invention allows to implement the comprehensive and rational coal use in subsoil due to efficient by-product extraction of methane, reduce net cost of coal, provide safe mineral development.
SUBSTANCE: method of determining the gas recovery of the mined seam in the stopping face is proposed, which consists in measuring the volumes of coal extracted by the miner and the intensity of methane release in the face area of the stopping face, determining the connection between the measured values and determining the value of gas recovery of the seam in the stopping face of the stopping face. At that the volume of coal excavated, and the intensity of methane release are measured at the site of the seam outside the area of its natural degassing with the mounting chamber and up to the first placing the main roof. The data of volume of coal excavated, which excess their average values during the observation period are used. The value of gas recovery of the seam in the stopping face is determined by the value of the coefficient of the amount of coal excavated in identified relationship between the values measured in the process of combine operation on coal drawing.
EFFECT: improvement of accuracy of determining the gas recovery of the mined seam.
SUBSTANCE: method of extraction of methane during abandonment of methane saturated mine comprising the termination of coal mining in a working face, isolation of local sections, execution and sealing of wellheads, connection of wells to a vent pipeline and methane extraction is offered. The wells are made from mining near break-down chamber over coal block into free space of the broken-down rocks of the main roof of the stopped working face, wells connect to the main vent pipeline and methane extract before isolation of local developments and after isolation of mine.
EFFECT: increase of time of operation of vent wells and increase of volumes of extracted methane suitable for utilisation.
SUBSTANCE: method of stimulation of coal bed through the wells drilled from excavations, comprising the hydraulic fracturing and the subsequent development of the formed cracks by air purge is offered. The hydraulic fracturing is performed by isolation with packers of the well site with the subsequent portion water pumping into the isolated site at a speed and under pressure, sufficient for layer hydraulic fracturing. The pumping of water portions is repeated until occurrence of initial cracks of hydraulic fracturing. Then the water is pumped out from a well and air at the volume sufficient for development of pattern of cracks of hydraulic fracturing is pumped. The creation of pattern of cracks of hydraulic fracturing is repeated on well sites along the whole its length with the intervals pre-determined by geological conditions and pre-set degassing level.
EFFECT: improvement of efficiency of coal bed degassing.
SUBSTANCE: method of determining the length of bearing pressure zone from breakage face is proposed, comprising preparatory workings, mining of coalbed with breakage face, drilling the degasification well, sealing its mouth from the mine atmosphere, measuring the intensity of gas release from the well when it transition from the zone of natural permeability of the bed in the bearing pressure zone from the breakage face. At that, the well in the unrelieved mass of the bed is drilled to the border of the bearing pressure from the opposite working, and the well mouth is sealed to the depth of the bearing pressure zone from the working, from which it is drilled. And the length of the bearing pressure zone from the breakage face is determined according to the distance between the zones of start of loading the bed and start of its discharge from the rock pressure.
EFFECT: improvement of accuracy of determining the length of the bearing pressure zone from the breakage face.
SUBSTANCE: invention proposes a forecasting method of gas balance of a working face, which involves measurement of volumes of extracted coal and intensity of gas release, establishment of a relationship between measured values and determination of a parameter of gas recovery of the bed being developed. The above measurements are made during each coal extraction shift, and the gas recovery parameter of the bed is determined as per intensity of maximum gas release during breaking cycles of the measured coal. A share of gas balance of the developed bed to the bottom-hole region is set by the ratio of intensity of maximum gas release from the bed and intensity of gas release of the working face.
EFFECT: method allows improving reliability of forecast of gas release from gas release sources to the bottom-hole region of the working face and recommending reasonable degassing methods and parameters of the developed bed and the worked-out space, thus providing standard parameters of mine air in a long working face and in an extraction area.
SUBSTANCE: invention relates to mining industry, namely to underground coal extraction. The invention proposes a complex method of preliminary degassing of a working coal bed, a worked-out area and accompanying beds and controlled caving of heavy roof, which involves performance of field development workings - strike entries and cross-entries; then, out of degassing-torpedo in-bed workings there drilled are groups of wells into soil and roof of the bed, and out of the leading in-bed working there drilled are long wells that are directed towards the worked-out area; after that, the leading shooting is performed to create fractures, and smooth roof caving is performed. A set of activities includes location of groups of wells that are common both for degassing and for shooting, and when field development strike entries are being developed, safety stiff and flexible pillars are formed. The wells drilled in the bed roof are of a degassing-torpedo type and they are located in such an order at which formation of fractures is provided by means of the leading shooting for longitudinal caving along the line passing parallel to a longwall. In addition to the leading shooting, lagging shooting is performed, by means of which transverse caving of slabs is performed along the line perpendicular to the longwall. And degassing of the worked-out area before caving in its upper part is performed through half-retained longwalls of the well.
EFFECT: increase of operating safety in a working face in beds that are dangerous as to a gas factor.
SUBSTANCE: proposed method comprises creation of fractures in coal seam by cyclic increase and decrease in fluid pressure in well and affecting the seam by low-frequency high-amplitude pressure pulses at fluid pressure increase in the well. Note here that connection of wellhead via fast-response valve with pressurized water source and with drain valve. Said fast-response valve is opened for time interval sufficient for water wave to reach the most remote section of the well and to develop hydraulic shock so that forming fractures of coal seam are developed. Then, said valve is closed to decrease water pressure to initial value. Note here that duration of valve opening and frequency of hydraulic shock repetition are selected to allow sufficient fracture formation, coal formation destruction and filling of the most remote well section with fragments of destructed coal seam. Hydraulic shocks are repeated unless well is filled with said fragments to its wellhead.
EFFECT: development of uniform system of fractures, accelerated destruction of coal seams at minimum application of equipment.
SUBSTANCE: proposed method comprises drilling of degassing well on the seam, making of permeability channels around said well, water removal and methane extraction. At seam degassing, well mouth is periodically closed and opened. Note here that closure is performed for 1-3 days while opening duration is limited by time required for attainment of maximum methane yield in previous period. Besides, air is forced in degassing wells at zero yield before first closure at absolute pressure over 6 bar to develop starting channels of permeability.
EFFECT: ten-fifteen times increase in methane yield, intensified degassing and reduced gas content.
2 cl, 3 dwg
SUBSTANCE: invention relates to device for dust suppression during earth excavation. The device includes chassis, jib pivotally connected to chassis rear end, cutting component fixed on the jib, casing at least partially covering the cutting component, vacuum source having fluid connection with casing inside and serving for suction of dusty air from this space, air cleaner for removing dust from air sucked by vacuum source from casing inside, dust barrier which protrudes down from the casing. In this system, the said dust barrier goes along at least portion of casing perimeter and has structure being permeable for chips created by cutting component. This structure provides gradual limiting of air flow entering inside through dust barrier as the dust barrier goes down from the casing.
EFFECT: device provides maintaining constant air flow through gap between casing and ground, and lets chips to pass through dust suppressing device without damaging it.
21 cl, 10 dwg
SUBSTANCE: self-contained system for damping of dust in hot dust-gas emission zone includes an in-series connected high-pressure pump, a start-up gate valve, a manifold located on a mobile transport base and self-deployed under action of water high pressure of a folding pipe line. The manifold has the possibility of connecting at least one water flow control to it. The folding pipe line includes a section made of pipe lengths with spring-loaded hinge articulations and the second section of pipe lengths with telescopic articulations, which rests on a wheel mount. The pipe line end is equipped with a Segner wheel with ejector water sprayers. Besides, the wheel mount is connected via two ropes passed through eyes of pipe lines, with right and left drums of a mechanical winch that is actuated from the transport base engine.
EFFECT: improving dust suppression efficiency of hot dust-gas emission zone; improving safety and environmental protection.
SUBSTANCE: device includes dust collection unit at least with one suction pipeline. At that, device is equipped with a hopper interconnected with dust collection unit that is made at least in the form of one cyclone-type vacuum cleaner, each of which is connected to the corresponding suction pipeline, and device for movement of the hopper and the above unit on the monorail along the mine working. Besides, device for movement of hopper and unit can include diesel locomotive, trolleys with hydraulic actuator, which are intended to arrange the hopper and each vacuum cleaner respectively, and suction pipeline of vacuum cleaner has the possibility of cleaning the mine working walls.
EFFECT: providing qualitative carry-over of the collected dust, as well as excluding the necessity of using the additional equipment for dust carry-over from mine working without stopping its cleaning process.
4 cl, 1 dwg
FIELD: machine building.
SUBSTANCE: proposed separator comprises box-like housing, nozzle, sludge extractor accommodating zigzag-like plates bent to form dihedral angles and sludge remover. Mesh sprayer representing a truncated right pyramid is arranged inside said housing between the nozzle and sludge extractor at some 25-30 cm, mesh width making 8-10 mm. Zigzag plates are bent at four points to form dihedral angles of 120° and arranged at 7-14 cm from each other so that dihedral angle apices are located in one plane. Said plates are furnished with eyebrows arranged on the angles outer sides all over their height and sharpened, their width making 0.05-0.10 of the distance between the plates. Sludge remover represents a truncated pyramid with face inclination of at least 60° and is attached to sludge extractor.
EFFECT: higher quality of air and gas flows purification.
FIELD: mining engineering.
SUBSTANCE: task of invention is ability of usage dust extractor in gas stream with temperature higher 60°C, and also simplification of its technological service. For decision of assigned task driving motor is taken away from gas pipeline, in structure it is used lamellar dust moisturiser, meshy gas scrubber, washer-cyclone direct-flow, which is communicated to mouth with bin for withdrawal of sludge. For simplification of technological service dust extractor consists of separate sections, waterproof joined to each other by flanges.
EFFECT: reliability growth of dust extractor operation.
FIELD: ventilation technique for preventing of air within working space from contamination, may be used for removing of dust from movable bulk material handling equipment such as retractable conveyors.
SUBSTANCE: apparatus has conveyor, throw-off drum with shelter, trough, and dust catcher with draft activator. Baffles are provided at discharge opening of trough, which is equipped with local suction device formed as chamber arranged around discharge opening of trough. Said chamber is connected through air duct with shelter air duct of throw-off drum. Dust catcher is made in the form of woven cellular filter provided with pulsed blower and opening for throwing-off caught product onto conveyor.
EFFECT: increased efficiency by localizing released dust in handling of bulk material, treatment of removed air according to maximum contamination level norms, and reduced capital and operational costs.
2 cl, 3 dwg
FIELD: mining industry, particularly to provide dust control in different processes by ejecting dust-laden air and entraining dust particles with liquid spray cone inside device and by separating the formed sludge.
SUBSTANCE: device has body with inlet and outlet orifices, injector nozzle, sludge trap and sludge removal pipe. Spray nozzles communicated with sludge trap through orifices of the body are arranged along inlet orifice perimeter. Sludge trap has floating valve arranged in bottom sludge trap part and installed in sludge removal pipe. Device also has dust catching sheets arranged between inlet and outlet orifices and defining working space for spray cone generated by injector nozzle shaped as expanding diffuser, which provides free spray cone penetration into sludge trap and air suction into inlet orifice. Dust catching sheets located near inlet orifice are inclined from body periphery towards spray cone axis and dust catching sheets arranged near outlet orifice are inclined from spray cone axis to body periphery.
EFFECT: increased capacity and efficiency, possibility of rational wetting liquid utilization.
SUBSTANCE: invention relates to the construction of jumpers in the mining industry, and more particularly to a device of jumpers in the supply workings of waste scouring faces and in the workings at fire sites in gassy mines. The jumper in the working is set without kerving, mobile and with opening window, closed at the back side with the shield sheet, with reinforced frame on the shield and the openings in the frame to access the radial rods connecting the frame itself, and a tube part with openings on the tube, which enters the middle of the shield sheet and through which a metal rod passes, engaged with the transverse rope, fixed by the anchors in the side walls of the working. At that at the explosion the shock wave moves the no-cut jumper and the shield shutter in the window, that directs a part of the wave on the boards and roof of the working, and the main shock wave is received by the rear fence consisting of bags of flame retardant inert dust, a second barrier shield on the metal rod, separating the bulk materials, and a set of the thrust racks at the output.
EFFECT: increasing the stability of the jumper.