CN104653182B - A kind of coal-mining method that the bastard coal of coal seam containing thick dirt band point is adopted - Google Patents

Abstract

The invention discloses a coal mining method for separate mining of coal and gangue in a thick gangue-containing coal seam. It is characterized in that the upper, middle and lower troughs are respectively arranged on the upper, middle and lower parts of the longwall coal mining face, and the coal mining face is divided into upper and lower sections, and the upper part of the working face is equipped with a conventional working face self-moving hydraulic support, The roof is managed by the caving method, and a normal scraper conveyor is supplemented. The motor is placed on the upper end of the working face and transported downward. The mined coal and gangue are transported downward to the gangue in the Zhongshun trough by the scraper conveyor. Separation platform; the length of the lower section of the working face is just enough to fill the gangue extracted from the working face and the lower section in the goaf, and a self-moving hydraulic filling support with a goaf retaining board is installed, and the filling method is adopted Management of the roof, supplemented by a high-power short-distance scraper conveyor, the motor is placed at the lower end of the working face, and transported upwards, the mined coal and gangue are transported upwards to the Zhongshun trough for coal and gangue separation by a high-power short-distance scraper conveyor tower.

Description

A Coal Mining Method for Separate Mining of Coal and Gangue in Thick Gangue Coal Seam

technical field

The invention relates to the technical problem of a mining method in the field of mining engineering, in particular to a coal mining method for separate mining of coal and gangue in thick gangue-containing coal seams.

Background technique

The mining of composite structure coal seams with large gangue thickness is a difficult problem in the field of coal mining:

One of the difficulties is that the current shearer has insufficient power for crushing gangue and consumes a lot of picks:

The second difficulty is that gangue is mixed with coal flow, which affects coal quality, increases transportation costs, and pollutes the environment.

For this reason, for the thicker gangue coal seam, many mines have given up mining, and even if they are reluctantly mined, they are also produced under low efficiency and low output state.

Contents of the invention

In order to solve the above-mentioned technical problems, the present invention provides a coal mining method for separate mining of coal and gangue in a thick gangue-containing coal seam. Compared with the existing technology, it has the advantages of less consumption and high mining efficiency for the mining of thicker gangue coal seams.

In order to achieve the above-mentioned technical purpose, the present invention adopts the following technical means:

A coal mining method for separate mining of coal and gangue in thick gangue-containing coal seams,

A. On the upper, middle and lower parts of the longwall coal mining face, the upper trough, the middle trough and the lower trough are respectively arranged, and the upper trough, the middle trough and the lower trough divide the coal mining face into the upper part of the working face , the lower part of the working face;

B. On the upper part of the working face: close to the bottom plate of the coal wall, a normal scraper conveyor is installed along the direction of the coal wall, and the motor of the normal scraper conveyor is placed on the upper end of the working face for downward transportation;

In the lower section of the working face: close to the bottom plate of the coal wall, a high-power short-distance scraper conveyor is supplemented along the direction of the coal wall, and the motor of the high-power short-distance scraper conveyor is placed at the lower end of the working face for upward transportation;

A coal and gangue separation platform is arranged at the overlapping part of the Zhongshun trough and the stope of the working face, and a coal transport transfer machine and a gangue transport transfer machine are arranged side by side on the platform;

The above-mentioned normal scraper conveyor is transported downwards, and the mined coal and gangue are transported downwards to the coal and gangue separation platform in the middle along the trough by the normal scraper conveyor;

The high-power short-distance scraper conveyor is transported upwards, and the mined coal and mixed gangue are transported upwards to the middle trough coal and gangue separation table by the high-power short-distance scraper conveyor;

The coal transport transfer machine transports the coal flow into the belt conveyor in the middle trough for outward transport;

The gangue transfer machine transports the gangue to the gangue filling field in the adjacent goaf.

Further, a raking winch is installed in the gangue filling field, and the motor drives the bucket of the raking winch to fill the gangue field from the gangue field into the goaf in the lower section of the working face to support the goaf roof.

Further, in the mined-out section of the lower section of the working face along the trough, the gangue-retaining single hydraulic prop is supported, and when the gangue is filling the goaf in the lower section of the working face, the return air chute used in the working face of the lower section is maintained .

Further, the length of the upper section of the working face is equal to the length of the normal working face, and the self-moving hydraulic support of the conventional working face is installed, and the roof is managed by the caving method.

Further, the length of the lower section of the working face satisfies: its length is just enough to fill the gangue extracted from the working face and the lower section in the gob; Brackets to manage the roof using the filling method.

Further, two pairs of staggered and forward-moving coal and gangue separation platform supports are arranged at the coal and gangue separation platform to support the roof there.

Further, the upper scraper conveyor on the working face is equipped with a coal and gangue separator at the coal and gangue separation platform, which are respectively overlapped with the coal transfer machine and the gangue scraper conveyor; A gangue diversion controller is set at the separation platform, which is respectively connected to the coal transfer loader and the gangue scraper conveyor.

Further, the lower section of the working surface is arranged ahead of the upper section of the working surface.

Further, the coal and gangue separation platform is equipped with two pairs of staggered forward self-moving advanced hydraulic supports to support the roof there.

The main innovations of the present invention are:

The upper, middle, and lower parts of the longwall coal mining face are respectively arranged with upper, middle, and lower slots to divide the coal mining face into upper and lower sections.

After dividing the working face into upper and lower sections, two scraper conveyors can be set up in this way: a normal scraper conveyor located on the upper section of the working surface and a high-power short-distance scraper conveyor located on the lower section of the working surface. In this way, it is convenient to transport the mixed flow of coal and gangue in the upper and lower sections of the working face to the Zhongshun trough of the working face, and a coal and gangue separation platform is arranged between the two scraper conveyors in the Zhongshun trough to carry out the coal and gangue separation operation and divide the flow transportation.

The length of the upper section of the working face is equal to the length of the normal working face. The self-moving hydraulic support of the conventional working face is installed, the roof is managed by the caving method, and the normal scraper conveyor is supplemented. The motor is placed on the upper end of the working face and transported downwards. The mined coal and gangue are conveyed downwards to the coal and gangue separation platform in the middle-shun trough by the scraper conveyor; , The gangue mined in the lower section is filled in the goaf, and a self-moving hydraulic filling support with a goaf block board is installed, and the filling method is used to manage the roof, and a high-power short-distance scraper conveyor is supplemented. At the lower end of the working face, it is transported upwards, and the mined coal and gangue are transported upwards to the coal and gangue separation platform in the Zhongshun trough by a high-power short-distance scraper conveyor.

The slot along the working surface is used for the return air of the upper and lower sections of the working surface, and at the same time solves the problem of the arrangement of the scraper conveyor tail and the motor on the upper working surface, so that the shearer on the upper working surface can directly cut to the coal wall at the end.

The trough in the working face is used for the layout of the coal transportation and coal gangue separation platforms on the working face and the lower sections. At the same time, the problem that the lower end of the upper section of the working face and the upper end of the lower section of the working surface can be directly cut by the shearer to the coal wall of the middle channel is solved.

The slot at the bottom of the working face is used for air intake at the upper and lower sections of the working face, and at the same time solves the problem of the arrangement of the scraper conveyor tail and the motor at the lower section of the working face, so that the shearer at the lower section of the working face can directly cut to the end of the coal wall.

The lower part of the working face is arranged ahead of the upper part of the working face by a certain distance and advanced in parallel. The distance is conducive to the arrangement of the coal and gangue separation platform.

The scraper conveyors on the working surface and the lower section are dual-purpose conveyors for coal transportation and gangue transportation. During normal production, coal mining and gangue cleaning are divided into two processes and are carried out alternately in the upper and lower sections of the working surface. , The lower part of the working face is cleared. After the process is completed, the processes on the working face and the lower part are exchanged, and the recovery work is carried out in such an alternate cycle.

A coal and gangue separation platform is arranged at the intersection and overlapping part of the trough and the stope of the working face in the working face, and a coal transporting reloader and a gangue transporting scraper conveyor are arranged side by side on the platform. The coal transportation reloading machine transports the coal flow into the belt conveyor along the trough; the gangue scraper conveyor transports the gangue into the gangue filling field adjacent to the goaf.

The scraper conveyor in the upper section of the working face is equipped with a coal and gangue separator at the coal and gangue separation platform, which overlaps with the coal transfer machine and the gangue scraper conveyor respectively; the scraper conveyor in the lower section of the working face is located at the coal and gangue separation platform The gangue diversion controller is set up to overlap with the coal transport reloader and the gangue scraper conveyor respectively.

When the coal is transported by the scraper conveyor on the working face, the coal lumps are usually small. The coal gangue sorter and the gangue diversion controller respectively control the coal flow into the coal transfer machine, and the coal transfer machine forwards it into Zhongshun Slotted belt conveyor, and shipped out.

When the gangue is transported by the scraper conveyor on the working face, the gangue pieces are usually relatively large. The gangue sorter and the gangue diversion controller respectively control the flow of gangue into the gangue scraper conveyor. Pick up the mixed large lumps of coal, and put them into the coal transfer machine, and transport the sorted gangue rocks to the gangue filling site by the gangue scraper conveyor.

A raking winch is installed in the gangue filling field, and the raking winch drives the raking bucket through the steel wire rope of the raking machine to fill the gangue field into the goaf in the lower section of the working face to support the roof of the goaf.

In the mined-out section of the lower section of the working face along the trough, there are single hydraulic props for retaining gangue as support, and when the gangue is filling the goaf in the lower section of the working face, the return air chute used in the lower section of the working face is maintained.

Two pairs of staggered and forward-moving coal and gangue separation platform supports are arranged at the coal and gangue separation platform to support the roof there.

The technical invention separates the coal mining from the gangue cleaning process. The coal seam is firstly mined and then the gangue is dropped, which increases the free surface of the broken gangue and reduces the difficulty and power consumption of the gangue dumping work. At the same time, the coal flow and the gangue flow are designed separately. The transportation system will fill the cleared gangue into the goaf of the working face nearby, and maintain the roadway for subsequent use along the goaf, which improves the recovery rate of coal, improves the output, efficiency and production benefits, and reduces the impact of gangue on the mine environment. Pollution, reducing the harm of mine pressure to the production system, is a very promising production technology.

Description of drawings

Fig. 1 is the structural representation of the present invention;

1—tail wheel of rake loader; 2—steel wire rope of rake loader; 3—retaining gangue plate of filling bracket; 4—bucket of rake loader; 5—self-moving hydraulic filling support of filling face; Self-moving hydraulic support on the working face; 8—goaf in the upper section of the working face; 9—head and motor part of the upper scraper conveyor on the working face; 10—scraper conveyor on the upper working face; 11—coal and gangue separation platform Bracket; 12—coal and gangue sorter; 13—coal transport reloader; 14—coal and gangue diversion controller; 15—scraper conveyor for gangue transportation; 16—short-distance high-power scraper conveyor; 17—working face 18—coal body in the upper section of the working face; 19—belt conveyor; 20—middle chute of the working face; 21—coal body in the lower section of the working face; 22—downward chute of the working face; 23—working face in the lower section body of coal.

Detailed ways

Related technical contents not mentioned below can adopt or learn from the prior art.

In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

As shown in Figure 1, a coal mining method for separate mining of coal and gangue in a thick gangue-containing coal seam,

On the upper, middle and lower parts of the longwall coal mining face, respectively arrange (mined out) the working face trough 17, the middle trough 20 and the lower trough 22, the upper trough 17, the middle trough 20 and the lower trough 22 The coal mining face is divided into the upper section of the working face and the lower section of the working face, and the coal is divided into - coal mass 18 in the upper section of the working face, - coal mass 21 in the lower section of the working face; coal mass 23 in the lower section of the working face;

The slot 17 on the working surface is used for the return air of the upper and lower sections of the working surface, and at the same time solves the problem of the arrangement of the tail and the motor of the upper scraper conveyor 10 on the working surface, so that the shearer on the upper working surface can directly cut to the end coal wall.

The straight groove 20 in the working face is used for the layout of the coal transportation and coal gangue separation platform sites of the lower two sections on the working face. At the same time, the problem that the lower end of the upper section of the working face and the upper end of the lower section of the working surface can be directly cut by the shearer to the coal wall of the middle channel is solved.

The slot 22 at the bottom of the working face is used for the air intake at the upper and lower sections of the working face, and at the same time solves the problem of the arrangement of the tail of the scraper conveyor and the motor at the lower section of the working face, so that the shearer at the lower section of the working face can directly cut to the end coal wall.

A normal scraper conveyor is auxiliary installed on the working surface, and the head and motor part 9 of the scraper conveyor on the working surface are placed on the upper end of the working surface and transported downward;

The specific layout is as follows: the length of the upper section of the working face is equal to the length of the normal working face, the self-moving hydraulic support 7 is installed and the non-filling working face is used, the roof is managed by the caving method, the normal scraper conveyor is supplemented, and the motor is placed on the working face. The upper end is transported downwards, and the mined coal and gangue are transported downwards to the coal and gangue separation table in the Zhongshun trough by a scraper conveyor;

A short-distance high-power scraper conveyor 16 is supplemented in the lower section of the working face, and the motor of the high-power short-distance scraper conveyor is placed at the lower end of the working face for upward transportation;

The length of the lower section of the working face is determined according to the proportion of the gangue thickness to the mining height, and its length is just enough to fill the goaf with the gangue mined from the working face and the lower section 8—the gob of the upper section of the working face; , install the self-moving hydraulic filling support 5 of the filling working face with the goaf block, adopt the filling method to manage the roof, and set up a high-power short-distance scraper conveyor. The motor is placed at the lower end of the working face and transported upwards. The extracted coal and gangue are transported up to the coal and gangue separation platform 11 in the Zhongshun groove with a high-power short-distance scraper conveyor.

A coal and gangue separation platform 11 is arranged at the cross-overlapping part of the Zhongshun trough and the stope of the working face, and a coal transporting reloader 13 and a gangue transporting scraper conveyor 15 are arranged side by side on the platform:

The gangue separation platform is provided with a coal and gangue sorter, which is respectively connected with the coal transporting transfer machine 13 and the gangue scraper conveyor 15; the coal transporting transfer machine transports the coal flow into the belt conveyor in the middle trough for outward transportation; The gangue transfer machine transports the gangue to the gangue filling field in the adjacent goaf. The scraper conveyor at the lower section of the working face is provided with a coal and gangue diversion controller 14 at the coal and gangue separation platform, which is respectively overlapped with the coal transfer loader and the gangue scraper conveyor.

A raking winch is installed in the gangue filling field, including the tail wheel of the raking machine 1, the steel wire rope of the raking machine 2, and the bucket 4 of the raking machine; the motor drives the bucket of the raking winch to fill the gangue from the gangue field into the goaf in the lower section of the working face Support the goaf roof.

In the mined-out section of the lower section of the working face along the trough, there are single hydraulic props for retaining gangue as support, and when the gangue is filling the goaf in the lower section of the working face, the return air chute used in the lower section of the working face is maintained.

The lower part of the working face is arranged ahead of the upper part of the working face by a certain distance and advanced in parallel. The distance is conducive to the arrangement of the coal and gangue separation platform.

The coal and gangue separation platform is equipped with two pairs of staggered forward self-moving advanced hydraulic supports to support the roof there.

A coal and gangue separation platform is arranged at the intersection and overlapping part of the trough and the stope of the working face in the working face, and a coal transporting reloader and a gangue transporting scraper conveyor are arranged side by side on the platform. The coal transportation reloading machine transports the coal flow into the belt conveyor along the trough; the gangue scraper conveyor transports the gangue into the gangue filling field adjacent to the goaf.

The upper scraper conveyor 10 and the lower scraper conveyor on the working face are dual-purpose conveyors for coal transportation and gangue transportation. During normal production, coal mining and gangue cleaning are divided into two processes, which are carried out alternately in the upper and lower sections of the working surface, that is, the working When coal is mined on the upper section, the lower section of the working face is cleared. After the process is completed, the processes on the working surface and the lower section are exchanged, and the mining work is carried out alternately in this way.

When the coal is transported by the scraper conveyor on the working face, the coal lumps are usually small. The coal gangue sorter and the gangue diversion controller respectively control the coal flow into the coal transfer machine, and the coal transfer machine forwards it into Zhongshun Groove belt conveyor 19, and outbound.

When the gangue is transported by the scraper conveyor on the working face, the gangue block is usually relatively large, and the gangue sorter 12 and the gangue diversion controller 14 respectively control the flow of gangue into the gangue scraper conveyor, and the gangue scraper conveyor is manually transported on the gangue scraper conveyor. The machine further picks up the mixed large lumps of coal, and puts them into the coal transfer machine, and the sorted gangue rocks are transported back to the gangue filling site by the gangue scraper conveyor.

The above descriptions are only preferred embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the application. Therefore, the present application will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (7)

1. a coal mining method containing thick gangue coal seam coal gangue separate mining, is characterized in that, A. On the upper, middle and lower parts of the longwall coal mining face, the upper trough, the middle trough and the lower trough are respectively arranged, and the upper trough, the middle trough and the lower trough divide the coal mining face into the upper part of the working face , the lower part of the working face; B. On the upper part of the working face: close to the bottom plate of the coal wall, a normal scraper conveyor is installed along the direction of the coal wall, and the motor of the normal scraper conveyor is placed on the upper end of the working face for downward transportation; In the lower section of the working face: close to the bottom plate of the coal wall, a high-power short-distance scraper conveyor is supplemented along the direction of the coal wall, and the motor of the high-power short-distance scraper conveyor is placed at the lower end of the working face for upward transportation; A coal and gangue separation platform is arranged at the overlapping part of the Zhongshun trough and the stope of the working face, and a coal transport transfer machine and a gangue transport transfer machine are arranged side by side on the platform; The above-mentioned normal scraper conveyor is transported downwards, and the mined coal and gangue are transported downwards to the coal and gangue separation platform in the middle along the trough by the normal scraper conveyor; The high-power short-distance scraper conveyor is transported upwards, and the mined coal and mixed gangue are transported upwards to the middle trough coal and gangue separation table by the high-power short-distance scraper conveyor; The coal transport transfer machine transports the coal flow into the belt conveyor in the middle trough for outward transport; The gangue transfer machine transports the gangue to the gangue filling field in the adjacent goaf; In the mined-out section of the lower section of the working face along the trough, there is a gangue-retaining single hydraulic prop for support, and when the gangue is filling the goaf in the lower section of the working face, the return air chute used in the lower section of the working face is maintained; The length of the lower section of the working face is sufficient: the length is just enough to fill the gangue mined from the working face and the lower section in the goaf; the lower section of the working face is equipped with a self-moving hydraulic filling support with a goaf retaining board. Filling method to manage the roof; The scraper conveyor in the upper section of the working face is equipped with a coal and gangue separator at the coal and gangue separation platform, which overlaps with the coal transfer machine and the gangue scraper conveyor respectively; the scraper conveyor in the lower section of the working face is located at the coal and gangue separation platform The gangue diversion controller is set up to overlap with the coal transport reloader and the gangue scraper conveyor respectively. 2. The coal mining method of separate mining of coal and gangue in the thick gangue-containing coal seam according to claim 1 is characterized in that a raking winch is installed at the gangue filling field, and the motor drives the rake bucket of the raking winch to remove the gangue in the gangue field. Fill in the goaf in the lower section of the working face to support the roof of the goaf. 3. according to claim 1, the coal mining method of separate mining of coal and gangue in the thick gangue-containing coal seam is characterized in that the length of the upper section of the working face is equal to the length of the normal working face, and the self-moving hydraulic support of the conventional working face is installed. The slump method manages the roof. 4. The coal mining method for separate mining of coal and gangue in thick gangue-containing coal seams according to claim 1, characterized in that two pairs of staggered and forward-moving coal and gangue separation platform supports are arranged at the coal and gangue separation platform to support the place. roof. 5. The coal mining method for separate mining of coal and gangue in thick gangue-containing coal seams according to claim 1, characterized in that two pairs of staggered and forward-moving coal and gangue separation platform supports are arranged at the coal and gangue separation platform to support this place roof. 6. The coal mining method for separate mining of coal and gangue in thick gangue-containing coal seams according to claim 1, characterized in that the lower section of the working face is arranged ahead of the upper section of the working face. 7. The coal mining method for separate mining of coal and gangue in thick gangue-containing coal seams according to claim 1, characterized in that two pairs of staggered forward self-moving advanced hydraulic supports are arranged at the coal and gangue separation platform to support the place of the top plate.