CN110748343A - Coal mining system and method for extremely-close coal seam - Google Patents
Coal mining system and method for extremely-close coal seam Download PDFInfo
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- CN110748343A CN110748343A CN201910883496.4A CN201910883496A CN110748343A CN 110748343 A CN110748343 A CN 110748343A CN 201910883496 A CN201910883496 A CN 201910883496A CN 110748343 A CN110748343 A CN 110748343A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/0004—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/03—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor having protective means, e.g. shields, for preventing or impeding entry of loose material into the working space or support
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F13/00—Transport specially adapted to underground conditions
- E21F13/06—Transport of mined material at or adjacent to the working face
Abstract
The invention discloses a coal mining system and a method for a very close coal seam, which comprises a common transportation lane arranged on one side of a top coal working face and a bottom coal working face and a common return air lane arranged on the other side of the top coal working face and the bottom coal working face, wherein the top coal working face is ahead of the bottom coal working face by a preset distance for mining, and the pushing speeds of the top coal working face and the bottom coal working face are the same; the top coal working face is provided with a first scraper conveyor, the bottom coal working face is provided with a second scraper conveyor, shared transportation equipment is arranged in the shared transportation lane, and the shared transportation equipment transports out coal mined by the first scraper conveyor and the second scraper conveyor. The invention realizes the simultaneous mining of two fully mechanized mining working faces of the slowly inclined extremely close coal seam by utilizing one set of roadway arrangement and one set of transportation and ventilation system, thereby simplifying the mining system, reducing the mining cost and realizing the safe and efficient mining of the slowly inclined extremely close coal seam in an intensive manner.
Description
Technical Field
The invention relates to the field of coal mining, in particular to a coal mining system and a coal mining method for a very close coal seam.
Background
At present, extremely close coal seams are quite common in China. The coal seam with extremely close distance means that two or more layers of coal seams are very close in distribution distance, the thickness of a top plate of the coal in the lower layer is only a few meters generally, so that after the coal seam in the upper part is mined, the coal seam in the lower layer has special top plate conditions, so that mining is difficult, and if the existing single coal seam mining method is adopted, the roadway layout of a working face is difficult, and the mining requirement cannot be met.
Disclosure of Invention
The invention aims to provide a coal mining system and a coal mining method for a coal seam in a very short distance, and aims to solve the problems that for coal mining of the coal seam in the very short distance, if the existing single coal seam mining method is adopted, the roadway layout of a working face is difficult, and the mining requirements cannot be met.
According to a first aspect, according to an embodiment of the present invention, a coal mining system for a very close coal seam is provided, including a common transportation lane arranged on one side of a top coal working face and a bottom coal working face, and a common return air lane arranged on the other side of the top coal working face and the bottom coal working face, wherein the top coal working face is advanced by a preset distance from the bottom coal working face for mining, and the simultaneous mining and advancing speeds of the top coal working face and the bottom coal working face are the same;
a first top coal face supporting assembly used for supporting the top coal face and a first bottom coal face supporting assembly used for supporting the bottom coal face are arranged in the common transportation roadway, and a second top coal face supporting assembly used for supporting the top coal face and a second bottom coal face supporting assembly used for supporting the bottom coal face are arranged in the common return air roadway;
the coal mining device is characterized in that a first scraper conveyor is arranged on the top coal working face, a second scraper conveyor is arranged on the bottom coal working face, shared transportation equipment is arranged in the shared transportation lane, and the shared transportation equipment conveys out coal mined by the first scraper conveyor and the second scraper conveyor.
Specifically, the preset distance is 10m to 20 m.
Specifically, the first top coal face support assembly comprises a first hydraulic advance support arranged in the common transportation lane and located below the top coal face, and a first end hydraulic support arranged in the common transportation lane and located at an end of the top coal face; a first hydraulic side protection plate is arranged on one side, close to the working surface, of the first forepoling hydraulic support, and a second hydraulic side protection plate is arranged on one side, close to the working surface, of the first end hydraulic support;
the first bottom coal working face supporting assembly comprises a second advanced hydraulic support which is arranged in the common transportation lane and is positioned below the bottom coal working face, and a second end hydraulic support which is arranged in the common transportation lane and is positioned at the end of the bottom coal working face;
the second top coal working face supporting assembly comprises a third advanced hydraulic support arranged in the common air return tunnel and positioned below the top coal working face, and a third end hydraulic support arranged in the common air return tunnel and positioned at the end of the top coal working face;
the second bottom coal working face supporting assembly comprises a fourth advanced hydraulic support which is arranged in the common air return roadway and is positioned below the bottom coal working face, and a fourth end hydraulic support which is arranged in the common air return roadway and is positioned at the end of the bottom coal working face;
be close to on first leading hydraulic support and the third leading hydraulic support first hydraulic pressure side guard plate is installed to one side of top layer working face be close to on first end hydraulic support and the third end hydraulic support second hydraulic pressure side guard plate is installed to one side of top layer working face be close to on second leading hydraulic support and the fourth leading hydraulic support third hydraulic pressure side guard plate is installed to one side of bottom coal working face be close to on second end hydraulic support and the fourth end hydraulic support fourth hydraulic pressure side guard plate is installed to one side of bottom coal working face.
Specifically, an isolation air barrier is arranged in the common air return lane.
Specifically, the common transportation equipment comprises a common reversed loader and a common rubber belt conveyor, the tail end of the second scraper conveyor is overlapped with the head end of the common reversed loader, and the tail end of the common reversed loader is overlapped with the head end of the common rubber belt conveyor; and the tail end of the first scraper conveyor is provided with a coal unloading chute, and the coal unloading chute is used for unloading the coal mined by the first scraper conveyor into a shared reversed loader.
In a second aspect, according to an embodiment of the present invention, there is provided a method for mining coal in a very short distance coal seam, which is applied to the above-mentioned system for mining coal in a very short distance coal seam, and includes:
the top coal working face is advanced by a preset distance from the bottom coal working face for extraction, and the simultaneous extraction and propulsion speeds of the top coal working face and the bottom coal working face are the same;
the coal falling from the top coal working face is loaded by using a first scraper conveyor, and the coal falling from the bottom coal working face is loaded by using a second scraper conveyor;
transporting the coal in the first scraper conveyor and the second scraper conveyor to a common transport device in a common transport lane;
and carrying out the coal by using the common transportation equipment in the common transportation lane.
Specifically, the preset distance is 10m to 20 m.
The embodiment of the invention provides a coal mining system and a method for a super-close coal seam, which enable a top coal working face and a bottom coal working face to share a ventilation roadway and a transportation roadway, and realize simultaneous mining of two fully-mechanized mining working faces away from a slowly-inclined super-close coal seam by utilizing a set of roadway arrangement and a set of transportation and ventilation system, thereby simplifying a mining system, reducing mining cost and realizing safe and efficient mining of the slowly-inclined super-close coal seam in an intensive manner.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a floor plan of a very close range coal seam mining system provided by an embodiment of the present invention;
FIG. 2 is a transverse cross-sectional view A-A of FIG. 1 of the present invention;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1 in accordance with the present invention;
fig. 4 is a longitudinal cross-sectional view through C-C of fig. 1 of the present invention.
Wherein, 1, a top coal working face; 1-1, a first advanced hydraulic support; 1-2, a first end hydraulic support; 1-3, a third advanced hydraulic support; 1-4, a third end hydraulic support; 1-5, a coal unloading chute; 1-6, isolating a wind barrier; 1-7, a first scraper conveyor; 1-8, top coal working face goaf; 2. a bottom coal face; 2-1, a second advanced hydraulic support; 2-1-1, a third hydraulic side guard plate; 2-2, a second end hydraulic support; 2-2-1, a fourth hydraulic side guard plate; 2-3, a fourth advanced hydraulic support; 2-3-1, a third hydraulic side guard plate; 2-4, a fourth end hydraulic support; 2-4-1, a fourth hydraulic side guard plate; 2-5, a second scraper conveyor; 2-6, a bottom coal working face goaf; 3. sharing a transportation lane; 4. sharing a return airway; 5. a common rubber belt conveyor; 6. sharing a reversed loader.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In a first aspect, according to an embodiment of the present invention, a coal mining system for a very close coal seam is provided, including a common transportation lane 3 disposed on one side of a top coal face 1 and a bottom coal face 2, and a common return air lane 4 disposed on the other side of the top coal face 1 and the bottom coal face 2, wherein the top coal face 1 is mined at a preset distance ahead of the bottom coal face 2, and the mining speeds of the top coal face 1 and the bottom coal face 2 are the same; a first top coal face supporting component for supporting the top coal face 1 and a first bottom coal face supporting component for supporting the bottom coal face 2 are arranged in the common transportation lane 3, a second top coal face supporting component for supporting the top coal face 1 and a second bottom coal face supporting component for supporting the bottom coal face 2 are arranged in the common return air lane 4; the top coal working face 1 is provided with first scraper conveyors 1-7, the bottom coal working face 2 is provided with second scraper conveyors 2-5, the shared conveying lane 3 is internally provided with shared conveying equipment, and the shared conveying equipment conveys out coal mined by the first scraper conveyors 1-7 and the second scraper conveyors 2-5.
The first top coal working face supporting assembly comprises a first advance hydraulic support 1-1 arranged in the common transportation lane 3 and located below the top coal working face 1, and a first end hydraulic support 1-2 arranged in the common transportation lane 3 and located at the end of the top coal working face 1.
The first bottom coal working face supporting assembly comprises a second advanced hydraulic support 2-1 arranged in the shared transportation lane 3 and located below the bottom coal working face 2, and a second end hydraulic support 2-2 arranged in the shared transportation lane 3 and located at the end of the bottom coal working face 2.
The second top coal working face supporting assembly comprises third advanced hydraulic supports 1-3 which are arranged in the common air return tunnel 4 and are positioned below the top coal working face 1, and third end hydraulic supports 1-4 which are arranged in the common air return tunnel 4 and are positioned at the end of the top coal working face 1.
The second bottom coal working face supporting assembly comprises a fourth advanced hydraulic support 2-3 arranged in the shared return airway 4 and located below the bottom coal working face 2, and a fourth end hydraulic support 2-4-1 arranged in the shared return airway 4 and located at the end of the bottom coal working face 2.
A first hydraulic side guard plate is arranged on one side, close to the top layer working face, of the first leading hydraulic support 1-1 and the third leading hydraulic support 1-3, a second hydraulic side guard plate is arranged on one side, close to the top layer working face, of the first end hydraulic support 1-2 and the third end hydraulic support 1-4, a third hydraulic side guard plate 2-3-1 and a third hydraulic side guard plate 2-1-1 are arranged on one side, close to the bottom layer coal working face, of the second leading hydraulic support 2-1 and the fourth end hydraulic support 2-3, and a fourth hydraulic side guard plate 2-4-1 and a fourth hydraulic side guard plate 2-2-1 are arranged on one side, close to the bottom layer coal working face 2, of the second end hydraulic support 2-2 and the fourth end hydraulic support 2-4-1.
The first hydraulic side guard plate and the second hydraulic side guard plate can effectively seal the goaf 1-8 of the top coal working face, and waste rocks of the goaf 1-8 of the top coal working face cannot escape into the common return airway 4 and the common transport airway 3. The third hydraulic side guard plates 2-3-1, 2-1-1 and the fourth hydraulic side guard plates 2-4-1, 2-2-1 can effectively seal the bottom coal working face goaf 2-6, and waste rocks in the bottom coal working face goaf 2-6 can not be led into the common return airway 4 and the common transport airway 3.
In the embodiment, the distance between the top coal working surface 1 and the bottom coal working surface 2 is not more than 3m, and a gangue layer is arranged between the two working surfaces. The top coal working face 1 is ahead of the bottom coal working face 2 by a preset distance for extraction, the preset distance is determined by the longitudinal sizes of a second ahead hydraulic support 2-1 and a second end hydraulic support 2-2 of the bottom coal working face 2, and the preset distance is usually 10-20 m; meanwhile, the advancing speeds of the top coal working face 1 and the bottom coal working face 2 are the same, namely, the offset distance between the two working faces is always kept in the advancing process of the two working faces. If the advancing speed of the top coal working face 1 is higher than that of the bottom coal working face 2, the distance between the top coal working face and the bottom coal working face is increased, the exposed length of a goaf 1-8 of the top coal working face exceeds the effective support width of a third hydraulic side guard plate 2-3-1, 2-1-1 and a fourth hydraulic side guard plate 2-4-1, 2-2-1 of the bottom coal working face 2 in the common transport lane 3 and the common return airway 4 of the two coal working faces, and gangue in the goaf is inevitably led to enter the common transport lane 3 and the common return airway 4 of the two working faces; if the advancing speed of the top coal working face 1 is lower than that of the bottom coal working face 2, the distance between the two working faces is reduced, and the first advanced hydraulic support 1-1 and the first end hydraulic support 1-2 of the bottom coal working face 2 are inevitably caused to block the safety outlet of the working face, so that the normal production of the working face is influenced.
In the above embodiment, the isolation windbreaks 1-6 are arranged in the common return airway 4 to ensure that the top coal working face 1 has enough wind volume.
In the above embodiment, the common transport apparatus includes the common reversed loader 6 and the common belt conveyor 5, the tail end of the second scraper conveyors 2 to 5 overlaps the head end of the common reversed loader 6, and the tail end of the common reversed loader 6 overlaps the head end of the common belt conveyor 5; the tail end of the first scraper conveyor 1-7 is provided with a coal unloading chute 1-5, and the coal unloading chute 1-5 is used for unloading the coal collected by the first scraper conveyor 1-7 into a common reversed loader 6. The coal of the top coal working face 1 is loaded into a first scraper conveyor 1-7 of the top coal working face 1, and is unloaded into a reversed loader 6 shared by the two working faces through a coal unloading chute 1-5 of the top coal working face 1, and then is carried out by a rubber belt conveyor 5 shared by the two working faces; the coal falling from the bottom coal working face 2 is directly loaded into the reversed loader 6 shared by the two working faces through the second scraper conveyor 2-5 of the working face, and then is carried out by the rubber belt conveyor 2-5 shared by the two working faces. The transportation capacity is determined by the capacity of the two working faces, the type of the equipment is selected according to the conventional method of the fully mechanized mining working faces; three-machine matching and equipment type selection of the two working surfaces are also carried out according to a conventional method.
The embodiment of the invention provides a coal mining system for a very close coal seam, which enables a top coal working face 1 and a bottom coal working face 2 to share a ventilation roadway and a transportation roadway, and realizes the simultaneous mining of two fully-mechanized mining working faces of a slowly inclined very close coal seam by utilizing a set of roadway arrangement and a set of transportation and ventilation system, thereby simplifying the mining system, reducing the mining cost and realizing the safe and efficient mining of the slowly inclined very close coal seam in an intensive manner.
In a second aspect, according to an embodiment of the present invention, there is provided a method for mining coal in a very short distance coal seam, which is applied to the above-mentioned system for mining coal in a very short distance coal seam, and includes:
step 41: the top coal working face 1 is ahead of the bottom coal working face 2 by a preset distance for extraction, and the advancing speeds of the top coal working face 1 and the bottom coal working face 2 are the same.
The top coal working face 1 is ahead of the bottom coal working face 2 by a preset distance for extraction, the preset distance is determined by the longitudinal sizes of a second ahead hydraulic support 2-1 and a second end hydraulic support 2-2 of the bottom coal working face 2, and the preset distance is usually 10-20 m; meanwhile, the advancing speeds of the top coal working face 1 and the bottom coal working face 2 are the same, namely, the stagger distance between the two working faces is always kept in the advancing process of the two working faces. If the pushing speed of the top coal working face 1 is higher than that of the bottom coal working face 2, the distance between the top coal working face and the bottom coal working face is increased, the exposed length of the goaf of the top coal working face 1 exceeds the effective support width of the third hydraulic side guard plate 2-3-1, 2-1-1 and the fourth hydraulic side guard plate 2-4-12-2-1 of the bottom coal working face 2 in the common transport lane 3 and the common return airway 4 of the two coal working faces, and gangue in the goaf is inevitably led to flow into the common transport lane 3 and the common return airway 4 of the two working faces; if the advancing speed of the top coal working face 1 is lower than that of the bottom coal working face 2, the distance between the two working faces is reduced, and the first advanced hydraulic support 1-1 and the first end hydraulic support 1-2 of the bottom coal working face 2 are inevitably caused to block the safety outlet of the working face, so that the normal production of the working face is influenced.
Step 42: the coal falling from the top coal working face 1 is loaded by the first scraper conveyor 1-7, and the coal falling from the bottom coal working face 2 is loaded by the second scraper conveyor 2-5.
Step 43: the coal in the first scraper conveyor 1-7 and the second scraper conveyor 2-5 is transferred to the common transportation equipment in the common transportation lane 3.
Step 44: the coal is carried out by using the common transportation equipment in the common transportation lane 3.
The embodiment of the invention provides a coal mining method for a very close coal seam, which enables a top coal working face 1 and a bottom coal working face 2 to share a ventilation roadway and a transportation roadway, and realizes the simultaneous mining of two fully-mechanized coal mining working faces of a slowly inclined very close coal seam by utilizing a set of roadway arrangement and a set of transportation and ventilation system, thereby simplifying a mining system, reducing the mining cost and realizing the safe and efficient mining of the slowly inclined very close coal seam in an intensive manner.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (7)
1. The coal mining system for the coal seam in the extremely close range is characterized by comprising a common transportation lane arranged on one side of a top coal working face and one side of a bottom coal working face, and a common return airway arranged on the other side of the top coal working face and the other side of the bottom coal working face, wherein the top coal working face is ahead of the bottom coal working face by a preset distance for mining, and the top coal working face and the bottom coal working face are mined simultaneously and have the same propulsion speed;
a first top coal face supporting assembly used for supporting the top coal face and a first bottom coal face supporting assembly used for supporting the bottom coal face are arranged in the common transportation roadway, a second top coal face supporting assembly used for supporting the top coal face and a second bottom coal face supporting assembly used for supporting the bottom coal face are arranged in the common return airway;
the coal mining system is characterized in that a first scraper conveyor is arranged on the top coal working face, a second scraper conveyor is arranged on the bottom coal working face, shared transportation equipment is arranged in the shared transportation lane, and the shared transportation equipment conveys out coal mined by the first scraper conveyor and the second scraper conveyor.
2. The system of claim 1, wherein the predetermined distance is 10m to 20 m.
3. The system of claim 1, wherein the first top coal face support assembly comprises a first forepoling hydraulic support disposed within the common haulage roadway and below the top coal face, and a first end hydraulic support disposed within the common haulage roadway and at an end of the top coal face;
the first bottom coal working face supporting assembly comprises a second advanced hydraulic support which is arranged in the common transportation lane and is positioned below the bottom coal working face, and a second end hydraulic support which is arranged in the common transportation lane and is positioned at the end of the bottom coal working face;
the second top coal working face supporting assembly comprises a third advanced hydraulic support arranged in the common air return tunnel and positioned below the top coal working face, and a third end hydraulic support arranged in the common air return tunnel and positioned at the end of the top coal working face;
the second bottom coal working face supporting assembly comprises a fourth advanced hydraulic support which is arranged in the common air return roadway and is positioned below the bottom coal working face, and a fourth end hydraulic support which is arranged in the common air return roadway and is positioned at the end of the bottom coal working face;
be close to on first leading hydraulic support and the third leading hydraulic support first hydraulic pressure side guard plate is installed to one side of top layer working face be close to on first end hydraulic support and the third end hydraulic support second hydraulic pressure side guard plate is installed to one side of top layer working face be close to on second leading hydraulic support and the fourth leading hydraulic support third hydraulic pressure side guard plate is installed to one side of bottom coal working face be close to on second end hydraulic support and the fourth end hydraulic support fourth hydraulic pressure side guard plate is installed to one side of bottom coal working face.
4. The system of claim 1, wherein an isolation windbreak is disposed within the common return airway.
5. The system of claim 1, wherein the common transport apparatus includes a common transloader and a common tape conveyor, a trailing end of the second flight conveyor overlapping a leading end of the common transloader, a trailing end of the common transloader overlapping a leading end of the common tape conveyor; and the tail end of the first scraper conveyor is provided with a coal unloading chute, and the coal unloading chute is used for unloading the coal mined by the first scraper conveyor into a shared reversed loader.
6. A method for mining coal in an extremely close coal seam, which is applied to the extremely close coal seam mining system according to any one of claims 1 to 5, and is characterized by comprising the following steps:
the top coal working face is advanced by a preset distance from the bottom coal working face for extraction, and the simultaneous extraction and propulsion speeds of the top coal working face and the bottom coal working face are the same;
loading coal falling from the top coal working face by using a first scraper conveyor, and loading coal falling from the bottom coal working face by using a second scraper conveyor;
transporting the coal in the first scraper conveyor and the second scraper conveyor to a common transport device in a common transport lane;
and carrying out the coal by using the common transportation equipment in the common transportation lane.
7. The method of claim 6, wherein the predetermined distance is 10m to 20 m.
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| CN112901170A (en) * | 2021-01-28 | 2021-06-04 | 河南理工大学 | Coal-aluminum combined mining method for shared working face |
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