CN114263494B - End filling maintenance lower roadway roof stabilizing structure and filling method thereof - Google Patents

End filling maintenance lower roadway roof stabilizing structure and filling method thereof Download PDF

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Publication number
CN114263494B
CN114263494B CN202111327002.8A CN202111327002A CN114263494B CN 114263494 B CN114263494 B CN 114263494B CN 202111327002 A CN202111327002 A CN 202111327002A CN 114263494 B CN114263494 B CN 114263494B
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filling
roadway
working face
slurry
roof
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CN114263494A (en
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张俊文
邓雪杰
王斐
刘旭正
汪振超
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China University of Mining and Technology Beijing CUMTB
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China University of Mining and Technology Beijing CUMTB
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Abstract

The invention discloses a stable structure of an end filling maintenance lower roadway top plate and a filling method thereof. The invention changes the top plate of the working face air inlet roadway which is originally a crushing zone into a stable top plate with certain strength in the arrangement of the staggered roadway, can realize anchoring support, overcomes the defects of high cost, low efficiency and poor effect caused by original shed support, and provides good top plate conditions for the lower roadway.

Description

End filling maintenance lower roadway roof stable structure and filling method thereof
Technical Field
The invention relates to a stable structure of an end filling maintenance lower roadway top plate and a filling method thereof, belonging to the field of scientific research of mine filling mining.
Background
Mining activities are moving towards the deep as shallow coal resources are gradually depleted. In the mining of large buried depth and thick coal seam, the arrangement mode of the staggered roadway can effectively realize the effects of yielding and pressure relief when dealing with the high ground stress generated in deep mining, and plays an important role in preventing rock burst, so the staggered roadway is widely applied to the mining of the deep coal seam. The arrangement mode of the staggered floor roadway is that a stoping roadway of the upper working face is arranged at the slope raising section, when the working face is mined, the air inlet roadway of the working face is arranged under the bottom plate of the return air roadway of the slope raising section of the upper working face to form a lower roadway, one side of the lower roadway is triangular coal formed after the slope raising of the upper working face, the other side of the lower roadway is solid coal to be mined, and an end goaf of the upper working face is arranged above the top plate of the roadway.
Because the end of the working face is overlapped by various bearing stresses, the top plate is more easily bent, even broken and collapsed after coal is mined, the caving rock blocks are covered above a lower roadway in a broken belt mode to serve as the top plate of the lower roadway, at the moment, the management of the top plate can be implemented only in a net laying or shed erecting mode, the supporting effect is poor due to the large crushing degree of the top plate, and the efficient implementation of the working face mining operation is further influenced. If the working face roadway is used as a lower roadway, if only starting from the roof management, the conventional means of paving an artificial false roof or erecting a shed and the like are adopted, the implementation difficulty is high, the effect is poor, and meanwhile, the influence of continuous movement of the rock mass of the roof of the upper working face is easily received, so that in the face of the defects, the end of the upper working face after the slope rise is filled by adopting a local filling mode, a stable roof condition is provided for the lower roadway by adopting an end filling mode, and the safe implementation of the mining operation of the working face is ensured.
Disclosure of Invention
The invention aims to provide a stable structure for maintaining a lower roadway roof by filling an end head and a filling method thereof, aiming at the problem of insufficient stability of the lower roadway roof in staggered-level roadway arrangement in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides an end fills maintains lower tunnel roof stable structure, includes the end obturator that fills at last working face return air tunnel end, and the basic top is above the end obturator, and the below is this working face air inlet tunnel to form basic top-end obturator-this working face air inlet tunnel's stable structure.
Furthermore, the width of the end filling body is equal to the length L of the filling section, L is determined by the horizontal internal offset distance d of an upper roadway and a lower roadway of the staggered roadway and the width L of the upper working face return air roadway, and the specific relation meets the requirement that L is d + 3L.
Furthermore, the end filling body is formed by cementing filling slurry and broken gangue in a filling section, and the strength after consolidation needs to meet the requirement of roof anchoring support.
A filling method for maintaining a stable structure of a lower roadway roof through end filling comprises the following steps:
constructing an end filling system and an end filling space of an upper working face return air roadway, wherein the end filling system comprises a filling pipe laid along the upper working face return air roadway side, and a slurry outlet of the filling pipe is positioned in a filling area; the filling space is surrounded by a bracket rear slurry baffle plate, a lateral slurry baffle plate, a solidified filling body in the last circulating filling operation and an upper working face return air roadway side wall which are positioned behind the hydraulic bracket at the end of the working face;
after the processes of coal cutting, frame moving and pushing the conveyor in the end head operation are finished, the pulling and moving device at the rear end of the bracket base pulls the slurry baffle to slowly move to be close to the hydraulic bracket;
thirdly, after the movement of the slurry baffle behind the support is finished, the lateral slurry baffle is installed at the joint of the filling section and the non-filling section under the shielding of the hydraulic support, so that the lateral slurry baffle, the slurry baffle behind the support, the upper working face air return roadway side and a solidified filling body behind the filling section are enclosed into a closed area;
step four, conveying the prepared slurry to a filling section through a filling pipe by using a slurry conveying pump, and stopping filling when the height of the filled slurry is close to the height of an upper working face air return roadway;
after slurry in the filling section is cemented with gangue to form a stable filling body, removing the lateral slurry baffles, withdrawing the slurry baffles behind the support along with the moving support of the hydraulic support, and simultaneously moving a slurry outlet port of the filling pipe to the next filling section;
and step six, repeating the step two to the step five until a stable structure of a basic top-end filling body-the working face return air roadway is formed along the propelling direction of the whole working face.
Furthermore, the filling pipe is formed by connecting a plurality of short pipes and is fixed on the top plate of the return airway on the upper working face through a fixing device.
Furthermore, the rear of the support is of a flexible split structure, the adjacent single plates are overlapped by small sections, and the length of the pulp blocking plate is smaller than the length L of the filling section and is connected by a pulling and moving device arranged at the rear part of the hydraulic support base. The pulling and moving devices are multiple, and the partition frame is installed on the hydraulic support.
Has the advantages that: the invention provides a stable structure and a filling method for maintaining a lower roadway top plate through end filling, wherein an end filling body constructed in a cementing filling mode in staggered-level roadway arrangement provides stable top plate conditions for a lower roadway, so that anchoring support can be realized, the defects of high cost, low efficiency, poor effect and the like when the original lower roadway top plate is used as a broken belt shed for management are overcome, and the lower roadway top plate is easier to support and manage.
Drawings
FIG. 1 is a schematic diagram of the arrangement of staggered level roadways according to the present invention;
FIG. 2 is a schematic view of a 'basic top-end filling body-roadway' stable structure constructed by the invention;
FIG. 3 is a schematic view of the tip filling system arrangement of the present invention;
FIG. 4 shows the connection of the rear fender to the bracket according to the present invention.
In the figure: 1. an upper working face air inlet roadway; 2. an upper working face return air roadway; 3. an upper working face gob area; 4. the working face is provided with an air inlet roadway; 5. stoping a roadway at the slope starting section of the working face; 6. the working surface; 7. an end filling body; 8. directly ejecting; 9. a filling section; 10. a non-filled section; 11. a laneway upper is arranged on the upper working surface; 12. an end filling pipe; 13. a hydraulic support; 14. a support pulling and moving device; 15. a baffle plate behind the bracket; 16. a lateral baffle plate; 17. a filling slurry transfer pump.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1a to 2, the stable structure of the top plate of the end filling maintenance lower roadway comprises an end filling body 7 filled at the end of an upper working surface air return roadway, a basic roof 8 is arranged above the end filling body 7, and a working surface air inlet roadway 4 is arranged below the end filling body 7, so that the stable structure of the basic roof 8-the end filling body 7-the working surface air inlet roadway 4 is formed.
The width of the end filling body 7 is equal to the length L of the filling section 9, the L is jointly determined by the horizontal internal offset distance d of an upper roadway and a lower roadway of an offset roadway and the width L of the upper working face return air roadway 2, and the specific relation meets the condition that L is d + 3L.
The end filling body 7 is formed by cementing filling slurry and broken gangue in the filling section 9, and the strength after consolidation needs to meet the requirement of roof anchoring support.
As shown in fig. 3, the filling method for maintaining the stable structure of the lower roadway roof by end filling comprises the following steps:
step one, constructing an end filling system and an end filling space of an upper working face air return roadway, wherein the end filling system comprises a filling pipe 12 laid along a side 11 of the upper working face air return roadway, a slurry outlet of the filling pipe 12 is positioned in a filling area 9, and the filling pipe 12 is formed by connecting a plurality of short pipes and is fixed on a top plate of the upper working face air return roadway 2 through a fixing device; the filling space is enclosed by a bracket rear slurry baffle 15 and a lateral slurry baffle 16 which are positioned behind a hydraulic bracket 13 at the end of the working face, a solidified filling body in the last circulating filling operation and an upper working face air return roadway side 11;
after the processes of coal cutting, frame moving and pushing the conveyor in the end head operation are finished, a pulling and moving device 14 at the rear end of the support base 13 pulls the slurry baffle 15 to slowly move to be close to the hydraulic support 13;
step three, after the movement of the bracket rear baffle plate 15 is finished, the lateral baffle plate 16 is installed at the joint of the filling section 9 and the non-filling section 10 under the shielding of the hydraulic bracket 13, so that the lateral baffle plate 16, the bracket rear baffle plate 15, the upper working face air return roadway side 11 and the solidified filling body 7 behind the filling section 9 are enclosed into a closed area;
step four, conveying the prepared slurry to a filling section 9 through a filling pipe 12 by using a slurry conveying pump 17, and stopping filling when the height of the filled slurry is close to the height of an upper working face air return roadway;
step five, after the slurry in the filling section 9 is cemented with the gangue to form a stable filling body, the lateral slurry baffle 16 is firstly removed, the slurry baffle 15 behind the bracket is removed along with the moving bracket of the hydraulic bracket 13, and simultaneously, the slurry outlet port of the filling pipe 12 is moved towards the next filling section;
and step six, repeating the step two to the step five until a stable structure of a basic top 8, an end filling body 7 and the working face return air roadway 4 is formed along the propelling direction of the whole working face.
The rear fender 15 of the support is used for preventing filling slurry from flowing into a coal face, the rear fender 15 of the support is of a flexible split structure, small sections of adjacent unit plates are overlapped, the length of the fender is smaller than the length L of the filling section 9, the rear fender 15 of the support is connected by a pulling and moving device 14 installed at the rear part of a base of a hydraulic support 13, the pulling and moving devices 14 are multiple, and the separation frame is installed on the hydraulic support 13. The movement of the pulp baffle along with the hydraulic bracket 13 is realized by a pulling and moving device.
The side baffle 16 is pushed toward the side where the filled section 9 and the non-filled section 10 meet under the shield of the bracket 13, and the filling slurry is prevented from flowing into the non-filled area in a large amount. And an approximately closed end filling space is defined by the bracket rear slurry baffle 15, the lateral slurry baffle 16, the stoping roadway side 11 and the end filling body 7 which is solidified in the last circulating filling operation.
In the arrangement of staggered floor position laneway, the working face air intake laneway is taken as a lower laneway, the top plate of the laneway originally belongs to a broken zone, and the conventional shed support is not only high in cost, but also poor in support effect. According to the invention, the end filling body is constructed by a cementing filling method through carrying out local filling on the end of the upper working face air intake roadway, so that conditions are provided for anchoring and supporting of the working face air intake roadway top plate, the supporting effect of the roadway top plate can be effectively improved, the supporting cost is reduced, and the defect that the working face air intake roadway top plate in staggered-position roadway arrangement is difficult to support and manage as a broken belt is overcome.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (7)

1. The utility model provides an end fills maintains next tunnel roof stable structure which characterized in that: the device comprises an end filling body (7) filled at the end of an upper working surface air return roadway, wherein a basic roof (8) is arranged above the end filling body (7), and the lower part of the end filling body is an air inlet roadway (4) of the working surface, so that a stable structure of the basic roof (8) -the end filling body (7) -the air inlet roadway (4) of the working surface is formed.
2. The end filling maintenance underpass roof stabilizing structure as claimed in claim 1, wherein: the width of the end filling body (7) is equal to the length L of the filling section (9), and the L is the horizontal internal offset distance between an upper roadway and a lower roadway of the staggered layer roadwaydAnd the width of the upper working face air return roadway (2)lJointly determine that the specific relationship satisfies L =d+3l
3. The end-filling maintenance lower roadway roof stabilizing structure according to claim 1, wherein: the end filling body (7) is formed by cementing filling slurry and broken gangue in the filling section (9), and the strength after consolidation needs to meet the requirements of roof anchoring and supporting.
4. A method of filling a stable structure of a head filling maintenance underpit roadway roof as claimed in any one of claims 1 to 3, wherein: the method comprises the following steps:
step one, constructing an end filling system and an end filling space of an upper working face air return roadway, wherein the end filling system comprises a filling pipe (12) laid along the upper working face air return roadway side (11), and a grout outlet of the filling pipe (12) is positioned in a filling section (9); the filling space is enclosed by a bracket rear slurry baffle (15) positioned behind a hydraulic bracket (13) at the end of the working face, a lateral slurry baffle (16), a solidified filling body in the last circulating filling operation and an upper working face air return roadway side (11);
after the processes of coal cutting, frame moving and pushing the conveyor in the end head operation are finished, a pulling and moving device (14) at the rear end of a support base (13) pulls a slurry baffle (15) to slowly move close to the hydraulic support (13);
thirdly, after the movement of the rear fender (15) of the bracket is finished, installing a lateral fender (16) at the joint of the filling section (9) and the non-filling section (10) under the shielding of a hydraulic bracket (13), and enabling the lateral fender (16), the rear fender (15) of the bracket, an upper working face return air roadway side (11) and a consolidated filling body (7) behind the filling section (9) to enclose a closed area;
step four, the prepared slurry is conveyed to a filling section (9) through a filling pipe (12) by a slurry conveying pump (17), and the filling is stopped when the height of the filled slurry is close to the height of an upper working face return air roadway;
fifthly, after the slurry in the filling section (9) is cemented with the gangue to form a stable filling body, the lateral slurry baffle (16) is firstly removed, the slurry baffle (15) behind the bracket is removed along with the moving bracket of the hydraulic bracket (13), and simultaneously, the slurry outlet port of the filling pipe (12) is moved towards the next filling section;
and step six, repeating the step two to the step five until a stable structure of a basic top (8) -an end filling body (7) -the working face air return roadway (4) is formed along the propelling direction of the whole working face.
5. The method for filling and maintaining the stable structure of the lower roadway roof by end filling according to claim 4, wherein: the filling pipe (12) is formed by connecting a plurality of short pipes and is fixed on a top plate of the return airway (2) of the upper working face through a fixing device.
6. The method for filling and maintaining the stable structure of the lower roadway roof by end filling according to claim 4, wherein: the rear grout blocking plate (15) of the bracket is of a flexible split structure, and small sections are overlapped between every two adjacent unit plates to ensure the grout blocking effect; the length of the baffle plate (15) is less than the length L of the filling section (9) and is connected by a pulling and moving device (14) arranged at the rear part of the base of the hydraulic bracket (13).
7. The method for filling and maintaining the stable structure of the lower roadway roof by end filling according to claim 6, wherein: the plurality of pulling and moving devices (14) are arranged on the hydraulic support (13).
CN202111327002.8A 2021-11-10 2021-11-10 End filling maintenance lower roadway roof stabilizing structure and filling method thereof Active CN114263494B (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2069758C1 (en) * 1994-04-19 1996-11-27 Донская угольная научно-исследовательская лаборатория Method for support of extraction drifts
CN101761338A (en) * 2010-03-13 2010-06-30 中国矿业大学 Gob-side entry retaining method of a solid filling coal mining half-section one-leg shed
CN103470261A (en) * 2013-09-30 2013-12-25 山东科技大学 Method for roadway driving along goaf under original roadway top plate of fully mechanized top coal caving goaf
CN203756173U (en) * 2014-02-25 2014-08-06 中国矿业大学(北京) Delay filling original roadway coal-pillar-free gob-side entrydriving system
CN104806289A (en) * 2015-04-08 2015-07-29 兖州煤业股份有限公司 Filling device and method of sectionalized tip of coal face
CN107387084A (en) * 2017-09-15 2017-11-24 中国矿业大学 A kind of gob side entry retaining reduces the construction method for cutting top depth
CN108843354A (en) * 2018-06-22 2018-11-20 太原理工大学 A kind of inclined super high seam lane top asymmetric anchor stalk method for protecting support of gob side entry driving
CN109763822A (en) * 2019-01-21 2019-05-17 西安科技大学 Face in steep thick coal seam Multi sectional is without coal column placement method between coal column staggered floor Hu Xiang and section

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2069758C1 (en) * 1994-04-19 1996-11-27 Донская угольная научно-исследовательская лаборатория Method for support of extraction drifts
CN101761338A (en) * 2010-03-13 2010-06-30 中国矿业大学 Gob-side entry retaining method of a solid filling coal mining half-section one-leg shed
CN103470261A (en) * 2013-09-30 2013-12-25 山东科技大学 Method for roadway driving along goaf under original roadway top plate of fully mechanized top coal caving goaf
CN203756173U (en) * 2014-02-25 2014-08-06 中国矿业大学(北京) Delay filling original roadway coal-pillar-free gob-side entrydriving system
CN104806289A (en) * 2015-04-08 2015-07-29 兖州煤业股份有限公司 Filling device and method of sectionalized tip of coal face
CN107387084A (en) * 2017-09-15 2017-11-24 中国矿业大学 A kind of gob side entry retaining reduces the construction method for cutting top depth
CN108843354A (en) * 2018-06-22 2018-11-20 太原理工大学 A kind of inclined super high seam lane top asymmetric anchor stalk method for protecting support of gob side entry driving
CN109763822A (en) * 2019-01-21 2019-05-17 西安科技大学 Face in steep thick coal seam Multi sectional is without coal column placement method between coal column staggered floor Hu Xiang and section

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