CN111828060A - Crossheading isolation coal pillar recovery system and recovery method for fully mechanized coal mining face - Google Patents

Crossheading isolation coal pillar recovery system and recovery method for fully mechanized coal mining face Download PDF

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Publication number
CN111828060A
CN111828060A CN202010694279.3A CN202010694279A CN111828060A CN 111828060 A CN111828060 A CN 111828060A CN 202010694279 A CN202010694279 A CN 202010694279A CN 111828060 A CN111828060 A CN 111828060A
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China
Prior art keywords
coal
mining
fully mechanized
continuous
crossheading
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CN202010694279.3A
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Chinese (zh)
Inventor
张立辉
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Shenhua Shendong Coal Group Co Ltd
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Shenhua Shendong Coal Group Co Ltd
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Priority to CN202010694279.3A priority Critical patent/CN111828060A/en
Publication of CN111828060A publication Critical patent/CN111828060A/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/60Devices for withdrawing props or chocks
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C41/00Methods of underground or surface mining; Layouts therefor
    • E21C41/16Methods of underground mining; Layouts therefor
    • E21C41/18Methods of underground mining; Layouts therefor for brown or hard coal
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F13/00Transport specially adapted to underground conditions
    • E21F13/06Transport of mined material at or adjacent to the working face
    • E21F13/066Scraper chain conveyors
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F17/00Methods or devices for use in mines or tunnels, not covered elsewhere

Abstract

The invention discloses a crossheading isolating coal pillar recovery system of a fully mechanized coal mining face, and belongs to the field of mining engineering design and manufacture. This recovery system is located fully mechanized coal face's subsidiary fortune tunnel, includes: the device comprises a continuous mining machine, a continuous transport vehicle, an auxiliary scraper conveyor and a plurality of protective supports; the continuous mining machine is used for mining the crossheading isolation coal pillar; the continuous mining machine is used for mining coal blocks, and the continuous mining machine is used for mining the coal blocks; the protective supports are used for supporting the side wall parts and the top plate of the goaf. The invention also discloses a recovery method of the crossheading isolation coal pillar of the fully mechanized coal mining face, and solves the problem of low recovery rate caused by non-recovery of the crossheading isolation coal pillar of the existing fully mechanized coal mining face.

Description

Crossheading isolation coal pillar recovery system and recovery method for fully mechanized coal mining face
Technical Field
The invention relates to the technical field of coal mining, in particular to a recovery system and a recovery method for a gate way isolation coal pillar in a gob on the side of a belt conveyor tunnel of a fully mechanized mining face.
Background
Coal, as the most important primary energy in China, occupies a dominant position in primary energy production and consumption, and as the main energy, the dominant position in national economy cannot be replaced and is unchanged for a long time. However, in the process of coal mining, a prominent problem exists that the coal mining rate is not high, according to the national legal regulations, the mining rate of a coal mining area is only equal to or greater than 75% of a thick coal seam, equal to or greater than 80% of a medium-thick coal seam and equal to or greater than 85% of a thin coal seam, a great waste phenomenon exists, a large amount of coal resources are left in the mining area, the hidden danger of spontaneous combustion and ignition exists, and huge economic loss is caused by spontaneous combustion of the mining area every year in China. Therefore, how to improve the recovery rate of the mining area becomes a technical problem to be solved urgently in the field.
FIG. 1 is a schematic diagram of a basic coal mining area, which includes a main transport roadway, an auxiliary transport roadway, a return air roadway, a mining area main transport roadway, a mining area auxiliary transport roadway, a mining area return air roadway, a fully mechanized mining face belt conveyor roadway, and a fully mechanized mining face auxiliary transport roadway. The coal recovered from the fully mechanized coal mining face is conveyed to the ground through a fully mechanized coal mining face belt conveyor lane, a mining area main conveying main lane and a main conveying main lane. And the coal pillar between the belt conveyor lane of the fully mechanized mining face and the auxiliary transportation lane close to the working face is the crossheading isolation coal pillar, and in the prior art, the crossheading isolation coal pillar is not generally recovered in the goaf. The problems that the recovery rate of a mining area is low, the mining pressure of the lower coal group is influenced, and the hidden danger of spontaneous combustion ignition exists exist.
Disclosure of Invention
The invention provides a crossheading isolation coal pillar recovery system for a fully mechanized mining face, which is used for recovering crossheading isolation coal pillars.
In order to solve the technical problems, the invention provides the following technical scheme:
fully combine crossheading of adopting working face and keep apart coal pillar recovery system, it is located fully to adopt the auxiliary of working face and transports the tunnel, includes: the device comprises a continuous mining machine, a continuous transport vehicle, an auxiliary scraper conveyor and a plurality of protective supports; the continuous mining machine is used for mining the crossheading isolation coal pillar; the continuous mining machine is used for mining coal blocks, and the continuous mining machine is used for mining the coal blocks; the protective supports are used for supporting the side wall parts and the top plate of the goaf.
In some embodiments of the invention, the advancing direction of the continuous miner and the main advancing direction of the fully mechanized mining face form an included angle of 90-165 degrees.
In some embodiments of the invention, the transfer direction of the continuous hauler is opposite to the propulsion direction of the continuous miner.
In some embodiments of the invention, the conveying direction of the auxiliary scraper conveyor is perpendicular to the conveying direction of the main scraper conveyor.
In some embodiments of the invention, the protective bracket comprises at least one first protective bracket, and the first protective bracket is positioned on the side of the continuous miner opposite to the main advancing direction of the fully mechanized mining face.
In some embodiments of the invention, the protective bracket comprises at least one second protective bracket, and the second protective bracket is positioned on one side of the continuous transport vehicle away from the crossheading isolation coal pillar.
In some embodiments of the present invention, the protection brackets include two third protection brackets, and the two third protection brackets are respectively located on two sides of the auxiliary scraper conveyor perpendicular to the conveying direction of the auxiliary scraper conveyor.
The invention also discloses a recovery method of the crossheading isolation coal pillar of the fully mechanized coal mining face, which adopts the recovery system of the crossheading isolation coal pillar of the fully mechanized coal mining face and comprises the following steps:
a. the continuous mining machine cuts and excavates the crossheading isolation coal pillar to form an underground chamber;
b. the continuous mining machine is used for mining coal blocks, and the continuous mining machine is used for mining the coal blocks;
c. the continuous mining machine sequentially cuts and excavates the crossheading isolation coal pillars along the main propelling direction of the fully mechanized mining face to form a plurality of chambers; wherein, adjacent chambers are isolated from each other.
In some embodiments of the invention, the protective support is advanced to roof support the chamber being cut before beginning the next chamber cut.
In some embodiments of the invention, the main scraper conveyor conveys the coal briquettes to the belt conveyor through the reversed loader. Compared with the prior art, the technical scheme of the invention has the following technical effects:
the invention recovers the crossheading isolation coal pillar, avoids the hidden danger of spontaneous combustion and ignition, and greatly improves the recovery rate of the mining area. The invention recovers most of the crossheading isolation coal pillars, can not form the problem of an island working surface in the goaf, and greatly reduces the mine pressure for the extraction of the next group of coal.
Drawings
The objects and advantages of the present invention will be understood by the following detailed description of the preferred embodiments of the invention, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic illustration of a coal mining area in the prior art;
FIG. 2 is a layout of the equipment of the fully mechanized mining face of the present invention;
fig. 3 is a schematic diagram of the crossheading isolated coal pillar recovery system of the fully mechanized coal mining face of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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 the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Fig. 2 is a schematic diagram of the fully mechanized mining face equipment arrangement of the present invention. The fully mechanized coal mining face comprises a coal mining machine 300, a main scraper conveyor 200, a reversed loader 500, a belt conveyor 600, a protective support 400 for providing protective support, and a control device 700 for providing power and electric energy; the direction indicated by the arrow is the main advancing direction of the fully mechanized mining face, and the mining direction of the coal mining machine 300 is perpendicular to the main advancing direction of the fully mechanized mining face. The working process of the fully mechanized coal mining face is as follows: when the coal mining machine 300 performs reciprocating excavation along the excavation direction, the main scraper conveyor 200 located at the lower side of the coal mining machine 300 conveys the coal briquettes into the roadway of the belt conveyor 600, and the transfer conveyor 500 transfers the coal briquettes onto the belt conveyor 600 to transport the coal briquettes to the outside of the coal mine. After the fully mechanized mining face is pushed, a crossheading isolation coal pillar A is formed, and the crossheading isolation coal pillar recovery system 100 is arranged in an auxiliary transportation roadway positioned on the lower side of the crossheading isolation coal pillar A.
Fig. 3 shows an embodiment of a gateway isolated coal pillar recovery system 100 for a fully mechanized mining face according to the present invention, which includes: the continuous mining machine 101, the continuous transportation vehicle 102, the auxiliary scraper conveyer 105 and a plurality of protective supports; the continuous mining machine 101 is used for mining the crossheading isolation coal pillar A; the continuous mining machine 102 is used for conveying the coal blocks mined by the continuous mining machine 101 to an auxiliary scraper conveyor 105, and the auxiliary scraper conveyor 105 is used for conveying the coal blocks to a main scraper conveyor 200 of the fully mechanized mining face; the protective supports are used for supporting the side wall parts and the top plate of the goaf.
Specifically, the advancing direction of the continuous miner 101 and the main advancing direction of the fully mechanized mining face form an included angle of 90-165 degrees. Since the width of the auxiliary transportation roadway is about 30m, the auxiliary transportation roadway needs to accommodate the continuous mining machine 101 and the continuous transporting vehicle 102, and the lengths of the auxiliary transportation roadway and the continuous mining machine 101 are close to or greater than 30m, as shown in fig. 3, in the embodiment, in order to increase the mining area of the gateway isolation coal pillar a, the included angle between the propulsion direction of the continuous mining machine 101 and the main propulsion direction of the fully mechanized coal mining face is 135 °.
Specifically, in order to quickly convey the coal briquette onto the main scraper conveyor 200, the conveying direction of the continuous miner 102 is set opposite to the advancing direction of the continuous miner 101. After the continuous miner 101 excavates the crossheading isolation coal pillar a, the continuous transport vehicle 102 linearly moves back and forth between the tail of the continuous miner 101 and the end of the auxiliary scraper conveyor 105, and can quickly transport out the coal blocks excavated by the continuous miner 101 without changing the direction.
Specifically, since the width of the auxiliary transportation roadway is relatively small, the continuous transportation vehicle 102 cannot directly transport the coal blocks onto the main scraper conveyor 200, and therefore, the transportation direction of the auxiliary scraper conveyor 105 is perpendicular to the transportation direction of the main scraper conveyor 200, and the auxiliary scraper conveyor can transport the coal blocks transported by the continuous transportation vehicle 102 to the main scraper conveyor 200 after transporting the coal blocks for a certain distance along the main propulsion direction.
In order to realize supporting of the side wall part and the top plate of the auxiliary roadway to ensure the safety of the top wall; the protective supports comprise at least one first protective support 103-1, and the first protective support 103-1 is located on one side of the continuous mining machine 101, which is opposite to the main advancing direction of the fully mechanized mining face. Specifically, as shown in fig. 3, two first protection supports 103-1 are arranged in the auxiliary transportation roadway in parallel, the first protection supports 103-1 extend along the main advancing direction of the fully mechanized coal mining face, and the width of the two first protection supports 103-1 is close to that of the auxiliary transportation roadway, so that gangue in a goaf cannot enter a working space.
Specifically, the protective supports comprise at least one second protective support 103-2, and the second protective support 103-2 is positioned on one side of the tandem transport vehicle 102 away from the crossheading isolation coal pillar A. The second protective bracket 103-2 supports the roof and supports the goaf side on the lower side of the continuous transport vehicle 102 in fig. 3, so that waste rocks in the goaf cannot enter the working space.
Specifically, the protection brackets include two third protection brackets 103-3, and the two third protection brackets 103-3 are respectively located on two sides of the auxiliary scraper conveyor 105 perpendicular to the conveying direction of the auxiliary scraper conveyor. The third protection support 103-3 extends along the main propelling direction of the fully mechanized coal mining face, so that the support area of the top plate is increased, a larger operation space is formed, and the auxiliary scraper conveyor 105 can be extended by a certain length, so that the recovered coal can be smoothly conveyed to the auxiliary scraper conveyor 105.
Specifically, one end of the second protective bracket 103-2 extends to the end of the first protective bracket 103-1, and the other end extends to the end of the auxiliary scraper conveyor 105, so as to expand the supporting range of the goaf side part and ensure that the gangue in the goaf cannot enter the working space.
Meanwhile, the ventilation of the recovery system adopts a mode that a fan is arranged in a fully mechanized mining working face to supply air to a recovery coal pillar working face, or an air duct is independently arranged in an auxiliary transportation roadway to supply air to the recovery working face.
The crossheading isolation coal pillar recovery system 100 for the fully mechanized coal mining face adopts the following steps for recovery.
a. The continuous mining machine 101 cuts and excavates the crossheading isolation coal pillar A to form an underground chamber; the cutting width is 3.3m, the cutting height is the lower value of the maximum cutting height of the continuous miner 101 and the maximum thickness of the coal bed, and the cutting depth is taken according to the specified values in the aspects of isolating the coal pillar width and ventilating.
b. The continuous transportation vehicle 102 conveys the coal blocks extracted by the continuous mining machine 101 to the auxiliary scraper conveyor 105, the auxiliary scraper conveyor 105 conveys the coal blocks to the main scraper conveyor 200, and the main scraper conveyor 200 conveys the coal blocks to the belt conveyor 600 through the transfer conveyor 500.
c. The protective bracket moves forwards to support a top plate of the cut chamber;
d. along the main propelling direction of the fully mechanized mining face, the continuous mining machine 101 sequentially cuts and excavates the crossheading isolation coal pillar A to form a plurality of chambers; wherein, adjacent chambers are isolated from each other.
The recovery method provided by the invention has the advantages that the crossheading isolation coal pillar A is recovered, the hidden danger of spontaneous combustion ignition is avoided, and the recovery rate of a mining area is greatly improved. According to one mining cave 3.3 × 4.5 × 6 × 1.3 ═ 115.83t, 680 mining caves can be mined according to the length of an auxiliary transportation roadway 3000m and the effective mining length 2750m, and the coal recovery amount is 78764.4 t.
The invention recovers most of the crossheading isolation coal pillar A, and can not form the problem of an island working surface in the goaf, thereby greatly reducing the mine pressure for the extraction of the next group of coal.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (10)

1. Fully combine crossheading of adopting working face and keep apart coal pillar recovery system, its characterized in that: it is located fully mechanized mining face's subsidiary fortune tunnel, includes:
the device comprises a continuous mining machine, a continuous transport vehicle, an auxiliary scraper conveyor and a plurality of protective supports; wherein the content of the first and second substances,
the continuous miner is used for excavating the crossheading isolation coal pillar; the continuous mining machine is used for mining coal blocks, and the continuous mining machine is used for mining the coal blocks;
the protective supports are used for supporting the side wall parts and the top plate of the goaf.
2. The fully mechanized coal mining face gateway isolation pillar recovery system of claim 1, wherein: and the propelling direction of the continuous mining machine and the main propelling direction of the fully mechanized mining face form an included angle of 90-165 degrees.
3. The fully mechanized coal mining face gateway isolation pillar recovery system of claim 1, wherein: the conveying direction of the continuous transport vehicle is opposite to the propelling direction of the continuous mining machine.
4. The fully mechanized coal mining face gateway isolation pillar recovery system of claim 1, wherein: the conveying direction of the auxiliary scraper conveyor is perpendicular to the conveying direction of the main scraper conveyor.
5. The gateway isolation pillar recovery system of the fully mechanized mining face according to any one of claims 1 to 4, wherein: the protective support comprises at least one first protective support, and the first protective support is positioned on one side, opposite to the main propelling direction of the fully mechanized coal mining face, of the continuous mining machine.
6. The fully mechanized coal mining face gateway isolation pillar recovery system of claim 5, wherein: the protective support comprises at least one second protective support, and the second protective support is positioned on one side, away from the crossheading isolating coal pillar, of the continuous transport vehicle.
7. The fully mechanized coal mining face gateway isolation pillar recovery system of claim 6, wherein: the protection support includes that two third protection supports, two the third protection support is located respectively assist scraper conveyor perpendicular to its direction of delivery's both sides.
8. The recovery method of the crossheading isolation coal pillar of the fully mechanized coal mining face is characterized in that the recovery system of the crossheading isolation coal pillar of the fully mechanized coal mining face according to any one of claims 1 to 7 is adopted, and the recovery method comprises the following steps:
a. the continuous mining machine cuts and excavates the crossheading isolation coal pillar to form an underground chamber;
b. the continuous mining machine is used for mining coal blocks, and the continuous mining machine is used for mining the coal blocks;
c. the continuous mining machine sequentially cuts and excavates the crossheading isolation coal pillars along the main propelling direction of the fully mechanized mining face to form a plurality of chambers; wherein, adjacent chambers are isolated from each other.
9. The method for recovering the crossheading isolation coal pillar of the fully mechanized mining face of claim 8, wherein: and before the next chamber is cut, the protective bracket moves forwards to support the top plate of the cut chamber.
10. The method for recovering the crossheading isolation coal pillar of the fully mechanized mining face of claim 8, wherein: the main scraper conveyor conveys the coal briquettes to the belt conveyor through the reversed loader.
CN202010694279.3A 2020-07-17 2020-07-17 Crossheading isolation coal pillar recovery system and recovery method for fully mechanized coal mining face Pending CN111828060A (en)

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