CN110529115B - Coal mining method for coping with roof crushing and support inclination - Google Patents

Coal mining method for coping with roof crushing and support inclination Download PDF

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CN110529115B
CN110529115B CN201910866421.5A CN201910866421A CN110529115B CN 110529115 B CN110529115 B CN 110529115B CN 201910866421 A CN201910866421 A CN 201910866421A CN 110529115 B CN110529115 B CN 110529115B
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support
coal
bracket
supports
roof
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CN110529115A (en
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苏正友
李畅
李建功
关昕宇
段宏飞
魏川博
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Jinneng Holding Coal Group Co Ltd
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK 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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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
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Abstract

The invention belongs to the field of coal mining of coal mines, in particular to a coal mining method for coping with roof breakage and support inclination, which solves the problem of difficult working face propulsion caused by roof breakage and support inclination of a mine in the background technology. The method solves the problem that the mine is difficult to advance on the working face due to the phenomena of roof breakage and support inclination, successfully shortens the construction time, has simple materials and lower cost, accelerates the feed speed, and successfully increases the advance speed from one advance every day to four to five advances every day.

Description

Coal mining method for coping with roof crushing and support inclination
Technical Field
The invention belongs to the field of coal mining of coal mines, and particularly relates to a coal mining method for coping with roof breakage and support inclination.
Background
The phenomena of roof breakage and support inclination frequently occur on the underground working face of the coal mine, so that the working face is difficult to propel, particularly, the coal mining machine is difficult to propel under the dual influence of roof breakage and support inclination, the coal mine yield is seriously influenced, the economic benefit is reduced, and the personal safety of workers is threatened.
Disclosure of Invention
The invention aims to solve the problem that the mine is difficult to advance on a working face due to the phenomena of roof breakage and support inclination in the background art, and provides a coal mining method for coping with roof breakage and support inclination.
The technical scheme for solving the technical problem is as follows: a coal mining method to cope with roof fragmentation and support leaning, comprising the steps of:
Figure DEST_PATH_IMAGE001
firstly, judging the inclination angle of the bracket, if the inclination angle of the bracket is more than or equal to 30 degrees, adjusting the inclined bracket to be in a vertical state firstly, and the steps are as follows:
Figure DEST_PATH_IMAGE002
before moving the frame, cleaning float coal and crushed waste rock in front of and in the frame, and simultaneously checking and maintaining damaged pipelines, rubber pipes, joints and connecting pins of all parts;
Figure DEST_PATH_IMAGE003
firstly moving the non-inclined supports under pressure, ensuring that the supports are moved one by one, enabling the supports to be vertical to the top plate and the bottom plate, enabling each support to reach the initial supporting force, withdrawing the side guard plate after the previous support is moved, moving the next support, and so on until the inclined supports vacate a moving space;
Figure DEST_PATH_IMAGE004
when the inclined support is processed, firstly, the inclined support is lowered by 200mm, a single hydraulic prop is respectively supported at the front and the back below a top beam on the inclined side of the support, the single hydraulic prop is supported between a bottom plate and a top plate of a fully mechanized mining face, and the support is properly lowered after the top beam of the support is leveled by supporting the single hydraulic prop;
Figure DEST_PATH_IMAGE005
then use the jack to adjust the inclined bracket, connect jack one end in the support hoisting hole of adjacent vertical state, the other end of jack is connected in the back timber hoisting hole of inclined bracket through the chain, then just pull the inclined bracket through operating the jack, fill up garrulous waste rock or railway timber below the base of support slope one side, many times the adjustment is in vertical state up to the support of originally inclining, then rise and tightly tightenA support;
Figure DEST_PATH_IMAGE006
when the inclined bracket is pulled to be in a vertical state or the inclination angle of the bracket is less than 30 degrees, the bracket is directly moved to pass through a broken coal roof for coal mining, and the steps are as follows:
Figure DEST_PATH_IMAGE007
drilling holes at intervals of four supports in a top plate crushing area before coal cutting, wherein the distance between the positions of the holes and the lower part of a top beam of the support is 0.5m, the vertical coal wall is upward to form an elevation angle of 5 degrees, the hole depth is 10-12 m, and a coal body curing agent is injected into the holes in advance;
Figure DEST_PATH_IMAGE008
threading steel wires at the top of the coal wall of the working face to form an artificial false roof;
Figure DEST_PATH_IMAGE009
cutting coal by adopting a one-way coal cutting process;
Figure DEST_PATH_IMAGE010
and the frame moving process lags two supports of the front roller of the coal mining machine and rubs the top to bring the frame to be pressed, and the telescopic beam and the side protection plate are timely stretched out after the frame moving process to carry out timely top protection on the machine way.
The invention has the beneficial effects that: the method solves the problem that the mine is difficult to advance on the working face due to the phenomena of roof breakage and support inclination, successfully shortens the construction time, has simple materials and lower cost, accelerates the feed speed, and successfully advances from one cutter every day to four to five cutters every day.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The coal mining method of the present invention that deals with roof chipping and support leaning will now be described.
A coal mining method to cope with roof fragmentation and support leaning, comprising the steps of:
Figure 683300DEST_PATH_IMAGE001
firstly, judging the inclination angle of the bracket, if the inclination angle of the bracket is more than or equal to 30 degrees, adjusting the inclined bracket to be in a vertical state firstly, and the steps are as follows:
Figure 912025DEST_PATH_IMAGE002
before moving the frame, cleaning float coal and crushed waste rock in front of and in the frame, and simultaneously checking and maintaining damaged pipelines, rubber pipes, joints and connecting pins of all parts;
Figure 19658DEST_PATH_IMAGE003
firstly moving the non-inclined supports under pressure, ensuring that the supports are moved one by one, enabling the supports to be vertical to the top plate and the bottom plate, enabling each support to reach the initial supporting force, withdrawing the side guard plate after the previous support is moved, moving the next support, and so on until the inclined supports vacate a moving space;
Figure 227917DEST_PATH_IMAGE004
when the inclined support is processed, firstly, the inclined support is lowered by 200mm, a single hydraulic prop is respectively supported at the front and the back below a top beam on the inclined side of the support, the single hydraulic prop is supported between a bottom plate and a top plate of a fully mechanized mining face, and the support is properly lowered after the top beam of the support is leveled by supporting the single hydraulic prop;
Figure 123847DEST_PATH_IMAGE005
then, adjusting the inclined bracket by using a jack, connecting one end of the jack into a bracket lifting hole in an adjacent vertical state, connecting the other end of the jack into a top beam lifting hole of the inclined bracket through a chain, righting the inclined bracket by operating the jack, filling crushed gangue or road wood below a base on the inclined side of the bracket, adjusting for multiple times until the originally inclined bracket is in a vertical state, and then lifting the bracket tightly;
Figure 352835DEST_PATH_IMAGE006
when the inclined bracket is pulled to be in a vertical state or the inclination angle of the bracket is less than 30 degrees, the bracket is directly moved to pass through a broken coal roof for coal mining, and the steps are as follows:
Figure 947764DEST_PATH_IMAGE007
drilling holes at intervals of four supports in a top plate crushing area before coal cutting, wherein the distance between the positions of the holes and the lower part of a top beam of the support is 0.5m, the vertical coal wall is upward to form an elevation angle of 5 degrees, the hole depth is 10-12 m, and a coal body curing agent is injected into the holes in advance;
Figure 458249DEST_PATH_IMAGE008
threading steel wires at the top of the coal wall of the working face to form an artificial false roof;
Figure 736914DEST_PATH_IMAGE009
cutting coal by adopting a one-way coal cutting process;
Figure 841530DEST_PATH_IMAGE010
and the frame moving process lags two supports of the front roller of the coal mining machine and rubs the top to bring the frame to be pressed, and the telescopic beam and the side protection plate are timely stretched out after the frame moving process to carry out timely top protection on the machine way.
Further, as a specific embodiment of the coal mining method for coping with roof breakage and support inclination, the positions of the single hydraulic props, which are in contact with the supports, are padded with wood boards or belts for soft contact and surface contact. The prop is prevented from slipping to hurt people, and when the hydraulic prop is operated, the single hydraulic prop is tied with a rope to prevent the prop from slipping and can play a role in buffering.
Further, as a specific embodiment of the coal mining method for coping with roof breakage and support inclination, the single hydraulic prop supplies liquid through a remote liquid supply gun, firstly, the liquid is slowly supplied to the single hydraulic prop until the single hydraulic prop is clamped firmly and is vertical to a coal wall, and then, after personnel are evacuated to a safe distance, the single hydraulic prop is supplied with liquid to adjust the top beam.
Further, as a specific embodiment of the coal mining method for coping with roof breakage and support inclination, when an inclined support is processed, the support is checked after the support is tried to be pulled by liquid supply and the jack and the chain are slightly forced and straightened, and after the support is ensured to be correct, the support is pulled formally. The trial-pull link ensures that different structures are abutted and fastened, and the slipping is prevented to cause safety accidents.
Further, as a specific implementation mode of the coal mining method for coping with roof breakage and support inclination, the steel needles are twist drill rods or round steel, and two steel needles are drilled at each support.
While the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (5)

1. A coal mining method for coping with roof breakage and support inclination is characterized by comprising the following steps:
Figure 561898DEST_PATH_IMAGE001
first, the inclination of the stent is judgedThe angle, if support inclination angle more than or equal to 30, then need adjust the support of slope to vertical state earlier, the step is as follows:
Figure 373734DEST_PATH_IMAGE002
before moving the frame, cleaning float coal and crushed waste rock in front of and in the frame, and simultaneously checking and maintaining damaged pipelines, rubber pipes, joints and connecting pins of all parts;
Figure 794351DEST_PATH_IMAGE003
firstly moving the non-inclined supports under pressure, ensuring that the supports are moved one by one, enabling the supports to be vertical to the top plate and the bottom plate, enabling each support to reach the initial supporting force, withdrawing the side guard plate after the previous support is moved, moving the next support, and so on until the inclined supports vacate a moving space;
Figure 204604DEST_PATH_IMAGE004
when the inclined support is processed, firstly, the inclined support is lowered by 200mm, a single hydraulic prop is respectively supported at the front and the back below a top beam on the inclined side of the support, the single hydraulic prop is supported between a bottom plate and a top plate of a fully mechanized mining face, and the support is properly lowered after the top beam of the support is leveled by supporting the single hydraulic prop;
Figure 255737DEST_PATH_IMAGE005
then, adjusting the inclined bracket by using a jack, connecting one end of the jack into a bracket lifting hole in an adjacent vertical state, connecting the other end of the jack into a top beam lifting hole of the inclined bracket through a chain, righting the inclined bracket by operating the jack, filling crushed gangue or road wood below a base on the inclined side of the bracket, adjusting for multiple times until the originally inclined bracket is in a vertical state, and then lifting the bracket tightly;
Figure 617186DEST_PATH_IMAGE006
when the inclined bracket is pulled to be in a vertical state or the inclination angle of the bracket is less than 30 degrees, the bracket is directly moved to pass through a broken coal roof for coal mining, and the steps are as follows:
Figure 779177DEST_PATH_IMAGE008
drilling holes at intervals of four supports in a top plate crushing area before coal cutting, wherein the distance between the positions of the holes and the lower part of a top beam of the support is 0.5m, the vertical coal wall is upward to form an elevation angle of 5 degrees, the hole depth is 10-12 m, and a coal body curing agent is injected into the holes in advance;
Figure 778357DEST_PATH_IMAGE009
penetrating a steel needle at the top of the coal wall of the working face to form an artificial false roof;
Figure 391DEST_PATH_IMAGE010
cutting coal by adopting a one-way coal cutting process;
Figure 854995DEST_PATH_IMAGE011
and the frame moving process lags two supports of the front roller of the coal mining machine and rubs the top to bring the frame to be pressed, and the telescopic beam and the side protection plate are timely stretched out after the frame moving process to carry out timely top protection on the machine way.
2. A coal mining method to cope with roof chipping and support leaning according to claim 1 where the individual hydraulic props are in soft and face contact with cushioned planks or belts in the locations where they are in contact with the supports.
3. The coal mining method for coping with roof breakage and support inclination as claimed in claim 2, wherein the hydraulic prop is supplied with liquid by a remote liquid supply gun, liquid is slowly supplied to the hydraulic prop until the hydraulic prop is clamped with the top beam and is vertical to the coal wall, and then liquid is supplied to the hydraulic prop to adjust the top beam after people are evacuated to a safe distance.
4. A coal mining method for coping with roof breakage and support inclination as claimed in claim 3, wherein, when handling inclined supports, the supports are inspected after trial drawing of liquid, slight force and straightening of jacks and chains, and then formal drawing of the supports after no error is ensured.
5. A coal mining method to cope with roof chipping and support leaning according to claim 4 where the steel needles are twist drill rods or round steel and two steel needles are drilled at each support.
CN201910866421.5A 2019-09-12 2019-09-12 Coal mining method for coping with roof crushing and support inclination Active CN110529115B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2247825A1 (en) * 2008-02-19 2010-11-10 Rag Aktiengesellschaft Method for automatically creating a defined face opening in plow operations in coal mining
CN102213102A (en) * 2011-06-07 2011-10-12 中国矿业大学 Method for righting toppled brackets of large-inclined-angle working surface
CN202788883U (en) * 2012-09-28 2013-03-13 中煤北京煤矿机械有限责任公司 Pi-type steel anti-inverted seat for high inclining-angle support
CN203730021U (en) * 2013-11-18 2014-07-23 山西潞安环保能源开发股份有限公司 Top coal caving hydraulic support group with transverse-pulling and diagonal-pulling tilting prevention device
CN105840236A (en) * 2016-03-31 2016-08-10 济宁矿业集团有限公司 Method using pilot tunnel to process tilting and dumping hydraulic support
CN206554957U (en) * 2017-02-08 2017-10-13 刘贤庆 A kind of steady monomer column attachment means

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2247825A1 (en) * 2008-02-19 2010-11-10 Rag Aktiengesellschaft Method for automatically creating a defined face opening in plow operations in coal mining
CN102213102A (en) * 2011-06-07 2011-10-12 中国矿业大学 Method for righting toppled brackets of large-inclined-angle working surface
CN202788883U (en) * 2012-09-28 2013-03-13 中煤北京煤矿机械有限责任公司 Pi-type steel anti-inverted seat for high inclining-angle support
CN203730021U (en) * 2013-11-18 2014-07-23 山西潞安环保能源开发股份有限公司 Top coal caving hydraulic support group with transverse-pulling and diagonal-pulling tilting prevention device
CN105840236A (en) * 2016-03-31 2016-08-10 济宁矿业集团有限公司 Method using pilot tunnel to process tilting and dumping hydraulic support
CN206554957U (en) * 2017-02-08 2017-10-13 刘贤庆 A kind of steady monomer column attachment means

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
千万吨级煤矿综采工作面倒架事故分析及处理;郑爱午等;《山西煤炭》;20160630;第36卷(第3期);第27-29页 *
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