RU2735072C2 - Process diagram of extraction section of underground safe development of high-gas-bearing formation - Google Patents

Abstract

FIELD: underground mining of coal beds.

SUBSTANCE: invention relates to a method for underground safe development of high-gas-bearing coal beds. Method of underground safe development of high-gas-bearing coal beds with transportation of coal along the haulage entry on wheel platforms. In compliance with this method, directional ventilation pattern of production section is provided, which provides neutralization of methane in worked-out space, with movement of fresh ventilation jet along haulage gangway and in ascending order along lava, and outgoing air jet from lava through worked space along installed in it round large-diameter metal pipe, which is protected against rock pressure and destruction by small rubbing stripes erected on its both sides.

EFFECT: technical result is higher efficiency of neutralizing methane release.

3 cl, 3 tbl, 5 dwg

Description

The invention relates to mining in the field of technology for underground development of coal deposits, occurring in flat seams. The aim of the invention is to create a technological scheme of a mining area, in which there is no formation of dangerous concentrations of methane in its atmosphere, leading to an explosion or explosion of methane.

When coal is mined from a coal seam, methane is released from this coal and from the freshly exposed surfaces of the seam being mined. In addition, methane from the worked-out area is sucked into the upper part of the lava with reverse flow ventilation schemes. In the mined-out area, methane appears from many sources: from undermined satellites of the developed seam, from coal in the mined-out area, remaining from incomplete extraction of coal from the developed seam, from adjacent rocks, etc. Thus, when developing coal seams, there are three main sources of methane emission on excavation area: coal chipped from the seam, exposed face of the working face and mined-out space. With the existing technological schemes for the development of highly gas-bearing coal seams, it is not possible to localize any of these sources of gas release.

There are many guidance documents on coal seam development technology. According to [1], for shallow strata of thin and medium thickness, the main system is a pillar development system with long pillars along strike or dip. According to [2], for the mines of the Kuznetsk coal basin, purposeless technological schemes of pillar systems for the development of shallow seams with reuse of excavation workings are provided. When mining coal seams hazardous in terms of methane emissions, according to [1], the seams are degassed and the ventilation jet is refreshed. However, an effective method of degassing the developed seams has not yet been developed, and for the application of the ventilation jet freshening up, direct-flow ventilation of the excavation areas is necessary, which cannot be created.

The closest invention, which is taken as a prototype, is a patent for invention No. 2459078 C1 registered in the State Register of Inventions of the Russian Federation on August 20, 2012 "Professor Kariman's method of underground mining in large blocks." The method includes extracting coal in large blocks by cutting longitudinal and transverse slots with a plow unit, cutting and water-cutting machines, loading the cut blocks onto wheeled platforms and transporting them along a haulage drift [3]. Coal mining in longwalls in large blocks can greatly reduce gas release from the broken coal and from the face in the longwall. However, over the past six years after the registration of the invention on August 20, 2012, the author failed to organize its application in mines. Private coal companies do not want to take on the burden of manufacturing new experimental equipment and mine testing and offer the author of new technologies to independently manufacture and test all new developments and turn to coal companies only with well-proven developments.

The purpose of the invention is to create a technology for conducting the entire complex of treatment works at the excavation site, which does not allow the formation of high concentrations of methane in the atmosphere of the excavation area by neutralizing all three sources of methane production: chipped coal, from the face of the working face and from the mined-out space. As in the prototype, to prevent methane emissions from the chipped coal transported along the haulage drift into the drift atmosphere, the invention envisages transporting the chipped coal as an option on platforms. But in order to prevent methane from the broken coal into the atmosphere of the drift, not only when coal is mined in large blocks, but also when it is mined by shearers or plows as alluvial, it is proposed to transport the broken coal by railway platforms moving along a 1520 mm wide rail track using the conveyor belt method. haulage [4]. In this case, it is possible to completely isolate the transported chipped coal and prevent methane release from it into the haulage drift atmosphere.

When coal was transported in trolleys or in platforms with high sides, methane from the underlying coal layers could not break through the overlying coal layers. Therefore, methane enters the haulage drift atmosphere only from the uppermost coal layers exposed in the drift space. That is why earlier, when transporting coal in trolleys, the haulage drifts were not gassed.

During the conveyor haulage to the storey haul road, freight railway platforms with a body side height of 74 cm are fed to the longwall loading station for loading.Then the methane in the coal in the platform body deeper than 20-30 cm will not be able to break into the mine atmosphere and will remain in the coal ... This will lead to a manifold decrease in gas emissions from the coal transported on the platforms. In addition, the coal transported in the platforms is easily insulated by pulling the moving platform with an awning on top, which ensures complete isolation of the transported coal and the impossibility of methane from coal entering the atmosphere of the transport mine.

Another option for transporting broken coal from a longwall along an adjacent transport tunnel and a panel inclined mine with complete insulation of the transported coal is the use of lamellar conveyors [5]. Such apron conveyors have high sides of 0.7 m. Due to this, a high level of coal filling is created, like in mine cars. Therefore, from the bulk of coal transported on such a conveyor located below the upper layer, methane is not emitted during transportation. The roof of the linear sections and the upper half-boards of the conveyor isolate the small amount of methane released from the upper coal layer into the limited space inside the plates.

To prevent methane inflows into the longwall from the worked-out space, according to the invention, it is planned to use a direct-flow ventilation scheme. To ventilate the cleaning works, fresh air is supplied through the transport drift, washes the working face and, together with the refreshing stream flowing through the ventilation drift, leaves through a round metal pipe of large section through the mined-out space into the inclined working of the general mine outgoing jet. The movement of fresh air masses from the transport drift into the longwall creates a reliable air support of pressure on the atmosphere of the mined-out space and does not allow the movement of methane-air jets from it into the outgoing lava jet. The use of a direct-flow ventilation scheme with an ascending direction of movement of a fresh air jet along the length of the longwall completely excludes the possibility of methane inflow from the worked-out space.

To protect the integrity of the metal pipe in the worked-out space from rock pressure and collapsing rocks, rubble strips of the required width and height are laid out on both sides of the lava. A solid round metal pipe with a large cross-section is laid in the worked-out space at the place of the extinguished ventilation drift by constantly building it up following the movement of lava from the delivered pipe sections up to 6 m long. The pipe diameter is 1.8-2 m, the metal thickness is 5 mm. Delivery of pipe sections is carried out on a railway platform along an inclined shaft and a ventilation drift directly to the place of joining with the stacked stack of the ventilation pipe. Railway length platform is 13.29 m, the width of the platform body is 2.76 m. The weight of one meter of a pipe with a diameter of 2 m is 3.14 × 2 m × 1 m × 0.005 m × 7800 kg / m3. m = 245 kg. The weight of one piece of pipe 6 m long is 245 kg / m × 6 m = 1470 kg. The descent of the delivered pipe section onto the soil of the ventilation drift is carried out by engaging the section with the stack of the pipe being built up and mechanized movement of the railway. platforms in the opposite direction.

Due to the redemption of the venttrack following the longwall, the traction conveyor is dismantled at the redemption section, with the help of which the railway is moved. platforms. Therefore, instead of the stationary drive head located in the underground chamber under the rail track, in connection with its dismantling during the drift-off, a mobile drive head is used.

When using plate conveyors of the type [5] or trolleys with a rail track 900 mm wide for transporting coal, platforms of the TDM type are used to deliver large-diameter pipe sections to the place of their installation [6].

After delivery to the installation site, a piece of metal pipe is stitched with a previously installed part of the pipe using a wire that is threaded through holes pre-drilled on the surface at both ends of the pipe. After connecting the pipes, the connecting seam is sealed with a rubberized sheet to ensure the aerodynamic continuity of the pipe.

Protection of the integrity of the metal pipe along the entire length of the mined-out space from rock pressure and collapsing rocks is provided by rubble strips erected on both sides of the pipe. The rubble strip, which protects the pipe from the side of the previously worked out extraction pillar, is laid out at an early stage, when the overlying excavation pillar was worked out and this ventilation drift served as a transport tunnel. The quarry strip was also laid out after the longwall in order to protect the transport tunnel from the rock pressure from the mined-out space for its reuse as a ventilation mine during the development of the underlying extraction pillar.

Thus, in order to ensure the safety of the metal pipe through which the air jet emanating from the working face is issued, it is necessary to lay out the rubble strip following the movement of the lava only from the side of the excavation column being worked out.

Neutralization of the third source of methane emissions from the face of the working face is achieved by diluting the methane in the outgoing stream from the face to a safe concentration by directing a sufficient amount of fresh air along the haulage drift into the longwall and along the ventilation drift to the longwall window on the ventilation drift.

During the operation of high-performance production faces, when there is especially a lot of excess methane production, due to the high rate of lava advance, the bottom-hole coal massif does not have time to degas strongly due to the natural outflow of methane from the exposed bosom of the face. Therefore, the main amount of methane contained in the coal and capable of being released leaves together with the chipped coal and therefore does not significantly affect the complication of the gas situation in the longwall itself, since it enters the railway. platforms or apron conveyor, where it is completely isolated and does not return. Therefore, the main volume of methane that forms the outgoing ventilation stream of lava is only methane release from the exposed breast of the production face.

The value of methane concentration in the air stream at the exit from the longwall window on the ventilation drift determines the general level of aerological safety of the atmosphere along the entire length of the longwall. Therefore, ensuring the safety of longwall cleaning operations in terms of the gas factor should be achieved by preventing the methane concentration in the outgoing lava jet from exceeding the permissible value.

When mining coal in a longwall, methane emissions from the face of a clean-up face consist of two components. The first is a constant methane background in time, the value of which is directly proportional to the length of the longwall and does not depend on whether the miner is working or not, and methane release from the freshly exposed breast of the face, the value of which is determined by the duration of the continuous operation of the miner at the current moment. At the moment of fresh bosom exposure by the operation of a combine harvester, the rate of gas recovery from 1 linear meter of the face of the working face increases tenfold compared to the rate of gas recovery of old-exposed sections along the length of the face. Therefore, with long periods of continuous operation of the shearer, the total methane release from the bottom of the face increases sharply. At high feed rates, which are possessed by modern coal-mining combines produced in Western countries and purchased by Russian coal companies, the concentration of methane in the outgoing lava jet can be extremely high, which is completely unacceptable, because there is a great danger of a severe explosion or methane flash. The preferable is the feed speed of the shearer not exceeding 5 m / min, and the need to increase productivity should be solved by switching to plow mining technology.

The total amount of fresh air that should be directed to the longwall along the transport road and to the longwall window along the ventilation drift to dilute the methane-air jet from the working face should be taken from the condition of continuous operation in the longwall of the mining machine.

The invention is illustrated by means of drawings, which show the following:

Figure 1. Technological scheme of the extraction area of the underground safe development of a shallow high-gas bearing formation; 1 - production face; 2 - transport drift; 3 - ventilation drift; 4 - ventilation round metal pipe of large section; 5 - rubble strip, erected to protect the ventilation pipe from the side of the lava; 6 - rubble strip from the side of the spent extraction column; 7 - rubble strip, erected to preserve and reuse as a ventilation operating transport drift; 8 - empty haulage inclined shaft; 9 - cargo haulage inclined shaft; 10 - rotary mine working for empty trains driving from the empty shaft to the haulage drift; 11 - rotary mine working for the arrival of loaded trains from the haulage drift to the cargo haulage inclined shaft; 12 - rotary mine workings for a loaded railway. platforms with a section of a metal pipe of a large cross-section to the ventilation drift and to drive the empty platform back to the empty shaft; 13 - ventilation inclined shaft.

Figure 2. Conveyor haulage of trains through underground mine workings, frontal view; 14 - freight railway platforms; 15 - rails; 16 - traction chains; 17 - gear wheels of driving heads; 18 - underground chambers of the drive heads.

Figure 3. Diagram of the transfer of tractive effort from the conveyor pushers to the sliding buffers of the railway. platforms, cross-section in the plane of the platform pull-out buffer; 15 - rails; 16 - traction chains; 19 - conveyor pusher; 20 - pull-out rail buffer platforms; 21 - rollers; 22 - platform body frame; 23 - wheels; 24 - sleepers; 25 - channel guides of the upper branch.

Figure 4. Loading coal in the railway. platforms or trolleys at the longwall loading station on the storey haulage drift, cross-section of the drift in the plane of the longwall delivery conveyor; 14 - railway platform; 26 - longwall delivery conveyor; 27 - awning covering from above the body of the platform loaded with coal.

Figure 5. Linear section of the apron conveyor, frontal view; 28 - plate; 29 - rear lug of the plate; 30 - rollers; 31 - strip eyelet; 32 - front lug of the plate; 33 - cargo axle; 34 - transverse plate; 35 - channel guides; 36 - side support posts; 37 - sides of the plate; 38 - transverse lounger; 39 - strip; 40 - section roof; 41 - section half-board.

FIG. 1 shows a technological scheme of an excavation area for a safe underground development of a high-gas-bearing flat coal seam. An extraction pillar, prepared according to a pillar development system, is located along the strike of the formation. The working face 1 moves along the extraction pillar, working it out in reverse. The extraction of coal in the longwall can be done by a shearer or a plow or by large sides according to [3]. Delivery of coal in the longwall to the haulage drift 2 is carried out by a scraper or plate conveyor. The ventilation of the excavation area is carried out according to the direct-flow ventilation scheme. A fresh air stream for ventilation of the lava moves along the transport road 2, washes the working face 1 and goes through the ventilation round metal pipe of large section 4 to the ventilation shaft 13. To dilute the methane in the outgoing methane-air jet of the lava, an air stream of backlighting is supplied along the ventilation road 3, which dilutes concentration of methane in the outgoing lava jet to a safe value and goes through the ventilation pipe 4 to the ventilation inclined shaft 13.

Protection of a ventilation metal pipe of a large section from rock pressure and collapsing rocks of the roof in the mined-out space is carried out by rubble strips located on both sides. The rubble strips on both sides of the pipe take on all the supporting pressure of the roof, preserving the integrity of the ventilation pipe, the roof itself in the pipe section, which ensures effective ventilation of the entire excavation area. The rubble strip 5 is erected following the movement of the lava from the rocks obtained from the drilling of breakthrough workings by the blast-hole method in the worked-out space near the place where the rubble strip was laid. The quarry strip 6 is erected earlier during the development of the overlying extraction pillar, when the ventilation drift 3 of the operating longwall was transport. To preserve the existing transport roadway 2 in order to reuse it as a ventilation one and to protect the ventilation pipe 4, a rubble strip 7 is erected in the wake of the longwall.

On the haulage empty inclined shaft 8 from the surface into the mine by the conveyor haulage method [4], empty trains of railway platforms are lowered and along the rotary mine working 10 are sent to the haulage drift 2 to the longwall loading station. After loading with coal, loaded railroad trains platforms, moving along the haulage drift 2, through the rotary mine working 11 go to the cargo haulage inclined shaft 9 and through it by the conveyor haulage method [4] they are released to the surface. Rotary mine working 12 is necessary for the arrival of loaded railways along it. platforms with materials for supporting ventilation drift 3 and for delivering pieces of a round metal pipe for the construction of ventilation pipe 4.

FIG. 2 shows a method of transporting railway platforms using a conveyor haulage method. The railway platform 14 rolls on rails 15, forming a track 1520 mm wide, using traction chains 16, driven by gear wheels 17 of the drive heads. The drive heads are installed in underground chambers directly below the track.

FIG. 3 shows a diagram of the transmission of tractive effort from the conveyor pusher 19 to the retractable bunker 20 of the railway. platforms. During conveyor haulage, the platforms are moved from above over the traction conveyor. The movement of the platforms is created by the interaction of the conveyor pushers 19 with the retractable buffers 20 of the platforms in their extended position. Retractable buffers 20 engage with the conveyor pushers 19 of the upper branch of the traction chains 16. The resulting forces from their engagement with the conveyor pushers are transmitted to the platform body frames 22, and from them to the entire body mass and the load in them. Under the influence of these efforts, the platforms acquire movement. Conveyor pushers 19 move on rollers 21 under the tension of two traction chains 16. Under the action of the acquired energy of the railway movement. the platform moves on wheels 23 on rails 15.

FIG. 4 shows the technological scheme of loading placer coal in the railway. platforms or trolleys at the lava loading station. The longwall delivery conveyor 26 is discharged directly into the bed of a platform, trolley or apron conveyor.

When transporting coal to the railway. platforms, so that methane from coal emitted in small quantities does not enter the atmosphere of the roadway, the platform body after loading it from above is tightly tightened with an awning 27. When loading or unloading the platform, the awning 27 is pulled along the guides in the opposite direction, allowing free access to the body.

FIG. 5 is a frontal view of a linear section of an apron conveyor. The plates 28 are attached to the load axles 33 of the rollers 30 with the rear eyes 29, and the strip eyes 31 and the front 32 plate eyes are also attached to them. The load axles 33 themselves rest on the rollers 30. The rollers 30 move when the plates 28 move along the transverse plates 34. The transverse plates 34 rest on the longitudinal channel guides 35, which in turn rest on the side support posts 36. The plates 28 with their sides 37 form a transport chute that moves coal. The side support legs 36 are installed on the transverse loungers 38. There are strips 39 vertically above the rollers, which are attached to the load axles 33 by means of the strips 31 lugs. The linear sections have a roof 40 on top and on both sides of it there are half-boards 41, due to which accumulating under them in small amounts, methane does not enter the atmosphere of the transport mine.

MAIN ADVANTAGES OF THE PROPOSED TECHNOLOGICAL SCHEME OF THE CUT AREA

Shown in FIG. 1, the technological scheme for conducting mining operations at the excavation site creates all the possibilities for safe mining in terms of the gas factor.

1. This method of providing direct-flow ventilation of the excavation area with the movement of the outgoing jet from the working face and the jet of freshening, coming through the ventilation drift into a large-diameter metal pipe laid through the goaf, reliably protects the operating longwall from gas ingress from the goaf. The pressure of moving fresh air masses along the working face does not make it possible to penetrate into the working face of methane accumulating in the mined-out space.

The presence of rubble strips on both sides of the mined-out space reliably ensures its isolation from fresh air flows into it and spontaneous combustion of coal in it. The presence of rubble strips on both sides of the metal pipe laid through the mined-out space reliably protects its integrity and this ensures high-quality ventilation of the excavation area. Rubble strips of rock, laid out on both sides of the metal pipe to a height sufficient after shrinkage, take on the entire load from the settling roof rocks and thereby protect the ventilation pipe from deformations due to the manifestation of rock pressure

The round profile of the metal pipe with a metal thickness of 5 mm also provides the ventilation pipe with high strength. In general, both factors reliably guarantee maintenance-free maintenance of the ventilation pipe in the goaf. Due to the large diameter of the ventilation pipe and its safety along its entire length during the absence of cleaning work (during the repair shift or non-working days), it is possible to conduct regular inspections of the condition of the pipe from the inside by passing the ventilation supervision persons along its entire length. If dangerous displacements of the pipe, divergence of seams, deformation of the pipe surface are detected, it is technically possible to carry out routine repairs from the inside of the pipe when any kind of floor appears and achieve the aerodynamic integrity of the ventilation pipe.

2. Due to the fact that when carrying out cleaning work in the longwall in the ventilation pipe laid through the mined-out space, movement or presence of people and equipment, including electrical equipment, is not allowed, there are no PB restrictions on the permissible percentage of methane concentration in the ventilation stream, passing through the pipe and the permissible speed of the air flow.

3. Technically, as shown earlier, the delivery of large-diameter metal pipe sections for laying a ventilation pipe in the mined-out space is not difficult, and economic calculations indicate the high economic feasibility of this. Laying a ventilation pipe through the mined-out space allows the use of a direct-flow ventilation scheme for ventilation of cleaning works in the excavation area, which gives a great economic effect, because the possibility of a significant increase in daily production is created. For laying the ventilation pipe in the worked-out space, "stale" metal pipes can be used. Any metal pipe (including a new one) that has been lying outdoors for more than a year is considered stale. According to online advertisements in 2018, the price of an old metal pipe is 50% of the cost of a new pipe. So the Mytishchi Pipe Plant sells stale pipes of any diameter at a price of 25.8 thousand rubles per 1 ton of weight. The weight of 1 m of a metal pipe with a diameter of 2 m was calculated by us earlier and is equal to 245 kg. Then the length of a pipe with a diameter of 2 m and a weight of 1 ton is 1000 kg: 245 kg / m = 4 m. Therefore, the price of 1 m of a stale pipe is 25.8 thousand rubles, t: 4 m / t = 6.5 thousand. RUB / m With the length of the excavation column being worked out, typical for the mines of Kuzbass, 2 km, the purchase price of 2000 m of stale pipe is 6.5 thousand rubles / m × 2000 m = 13 million rubles.

The costs of laying a rubble strip 2.5 m high and 5 m wide following the movement of the face without the use of mechanization can be carried out by 6 workers with a monthly salary of 90 thousand rubles. everyone has it. Since in the wake of the longwall it is necessary to lay out two rubble strips in the worked-out space (from the side of the transport tunnel and from the side of the installed ventilation pipe), then in economic calculations it is necessary to take into account the work of 12 workers. Then the annual costs of the mine for laying out two rubble strips will be

90 thousand rubles / month × 12 months × 12 people = 13 million rubles.

The total costs will amount to RUB 13 million. + 13 million rubles = 2 6 million rubles.

The use of the direct-flow ventilation method with the movement of an air jet emanating from the cleaning work will prevent forced long stoppages of the working face for degassing the workings, which will lead to a significant increase in the productivity of the working face. So expertly, it is possible to confidently assert the technical feasibility of increasing the productivity of working faces at many high-grade mines and mines of the 3rd category for hazardous gas emissions in Kuzbass and Vorkuta, developing gentle coal seams with a thickness of 3-4 m, by 5 thousand tons per day in the absence of restrictions on gas factor. This already gives a very large economic effect. So, with a price of $ 100 per ton of thermal coal and an average share of the mine's profit of 10%, the total annual profit of the mine from an increase in annual production will be

100 USD / t × 60 RUB / USD × 0.1 × 5000 tons / day × 300 days / year = 900 million rubles / year, which is 40 times higher than the entire cost of 26 million rubles for laying a ventilation pipe through the mined-out space and its protection rubble stripes. 4. As follows from the table. 1 technical characteristics of conveyor haulage [4] by freight railways. platforms, the technical capacity is 4850 t / h, and the cost of its construction for the whole mine does not exceed 100 million rubles. This is the most productive and economical mode of transport. Such indicators are provided by the railway. platforms of model 13-402 when they move on rails with a track width of 1520 mm at a speed of 1.4 m / s along a haul road with a length of 1800 m.The movement of platforms, including 18 in the train, is ensured by the operation of 4 successively installed traction conveyors, each 500 m in length ... Each conveyor has two drive heads equipped with 110 kW electric drives. The total installed electric power at the roadway is 8 × 110 kW.

As follows from the table. 2 technical characteristics of the conveyor haulage of cargo platforms in an inclined haulage shaft; its technical capacity is 6000 t / h; this is the highest productivity and significantly higher in comparison with all other modes of transport. This productivity is created by the movement of model 13-402 loading platforms at a speed of 1.4 m / s and a number of 11 in a train in an inclined shaft 1000 m long, driven with an inclination angle of 14 degrees to the horizon. The number of traction conveyors in series installed in the shaft is 4. Each conveyor is equipped with 4 electric drives of 500 kW each. In total, 16 electric drives of 500 kW are installed in the inclined shaft.

5. The apron conveyor consists of linear sections, head and end heads, transition sections to them. has a steel rectilinear chute, consisting of plates with high sides, moving on rollers in the upper position with a load on metal plates. FIG. 5, in the lower position empty in the opposite direction on the rollers along the channel guides. The carrying plates of the conveyor are not structurally connected to the traction chains and receive movement from the engagement of their blades with the pushers 19 of the traction chains 16 of the conveyor, as shown in FIG. 3. Due to this, the load-carrying plates can be moved from one conveyor train to another, transporting cargo over long distances without transferring the transported cargo from one train to another.

The apron conveyor is equipped with four electric motors of 110 kW each, has a high productivity of 4000 t / h, a large receiving capacity of 66 cubic meters per minute, a transport distance of 1200 m without additional electric motors and intermediate drives / linear conveyor sections take up a small space in the transport tunnel: width section - 1.33 m, the total height of the section from the ground together with the load-carrying plate - 2 m. The conveyor can work in a curved drift, it has no combustible elements, because all parts are steel. The speed of movement of the plates is 1.4 m. The metal consumption of the conveyor is 368 tons for a length of 1 km.

LITERATURE

1. Progressive technological schemes for the development of seams in coal mines. Part 3. Explanatory note. IGD them. A.A. Skochinsky. M. 1977 313 p.

2. Progressive technological schemes for the development of shallow seams with reuse of excavation workings for the mines of the p / o "Leninskugol" in Kuzniui. Prokopyevsk. 1986.53 s.

3. The method of professor Kariman S.А. underground mining in large blocks. Patent No. 2459078 C1 E21C. Registered in the State Register of Inventions of the Russian Federation on August 20, 2012. Author and patent holder Kariman S.A.

4. Kariman S.A. Conveyor haulage of freight trains along underground mine workings and inclined shafts of mines and transport lines of open-pit mines. Magazine "Coal" No. 11 2017.

5. Kariman S.A. Patent for invention No. 2649116 "Lamellar conveyor". The patentee and applicant S.A. Kariman Application No. 2016120294. Date of state registration in the state register of inventions March 29, 2018

6. Mining transport and mechanization of auxiliary works. Under the general editorship of B.F. Bratchenko. M. Nedra. 1978.423 s.

Claims (3)

1. Method for safe underground mining of high-gas-bearing coal seams with coal transportation along the haul road on wheeled platforms, characterized in that a direct-flow ventilation scheme of the mining area is provided, which neutralizes methane in the mined space, with the movement of a fresh ventilation stream along the haul road and in an ascending order along lava, and an outgoing air stream from lava through the mined-out space through a large-diameter round metal pipe installed in it, which is protected from rock pressure and destruction by small rubble strips erected on both sides of it. 2. A method according to claim 1, characterized in that the neutralization of methane coming from the face of the working face to a safe concentration is created by diluting it with fresh jets of air coming from the haulage drift and along the length of the face, and additional air flow entering the ventilation drift. 3. A method according to claim 1, characterized in that the neutralization of methane in the chipped coal transported by railway platforms is created by self-isolation in platforms with high sides by tightening the top of the platforms with an awning after loading the coal.

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