CN1737334A - Method for preventing top plate from large area collapsing - Google Patents

Method for preventing top plate from large area collapsing Download PDF

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Publication number
CN1737334A
CN1737334A CN 200410058492 CN200410058492A CN1737334A CN 1737334 A CN1737334 A CN 1737334A CN 200410058492 CN200410058492 CN 200410058492 CN 200410058492 A CN200410058492 A CN 200410058492A CN 1737334 A CN1737334 A CN 1737334A
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China
Prior art keywords
coal
coal column
lane
preserving
coal pillar
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN 200410058492
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Chinese (zh)
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CN100535388C (en
Inventor
任满翊
张日晨
周爱平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenhua Group Corp Ltd
Shenhua Group Shenfu Dongsheng Coal Co Ltd
Original Assignee
Shenhua Group Corp Ltd
Shenhua Group Shenfu Dongsheng Coal Co Ltd
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Application filed by Shenhua Group Corp Ltd, Shenhua Group Shenfu Dongsheng Coal Co Ltd filed Critical Shenhua Group Corp Ltd
Priority to CNB2004100584926A priority Critical patent/CN100535388C/en
Publication of CN1737334A publication Critical patent/CN1737334A/en
Application granted granted Critical
Publication of CN100535388C publication Critical patent/CN100535388C/en
Active legal-status Critical Current
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Abstract

This invention relates to a method for preventing the roof falling off in large area in coal getting area, which comprises the following steps: a) preserving protective coal pillar 35-45m in big lane, masonry sealing according to bearing wall standard after recovering the face; b) preserving pure coal pillar 15-20cm and radial semi-coal pillar 18-23m between working faces; c) preserving guard slot coal pillar, decreasing recovery ratio according to the pressure condition; d) preserving little coal pillar 500-900mm between adit; setting area separating coal pillar at the space of 450-550m in the branch lane, wherein its width is not less than 15m; e) sealing the branch lane port in time, increasing wood pillar in the large span place; besides, it uses mud and coal gangue to fill the goaf.

Description

Prevent the method for roof falling over great extent
Technical field
The present invention relates to the method that prevents roof falling over great extent in a kind of coal mining district.
Background technology
The coal resources of China are very abundant.When efficiently mine in large-scale colliery, along with the increasing goaf that occurs of exploitation.When the outstanding top of goaf large tracts of land, when pressure surpassed its enabling capabilities, if safeguard procedures are improper, goaf top plate constituted very big the threat with large area caving to adopting face.The main cause that roof falling over great extent takes place has:
At first, the coal top board belongs to the compound roof structure of being made up of mud stone, siltstone, multilayer seam, and bedding, joint, crack and sliding surface are grown in the top board, and top board is weak moisture in addition, and the rock hydrolysis is serious, and intensity is reduced.Rock collapses along structural plane and seam place absciss layer, and to fall be the main mode of roof destruction.
Secondly, span length is too big usually, will accelerate the sinking of top board, and roof caving takes place.Empty top area is excessive, also is to cause roof delamination one of the reason that falls that collapses.
Roof falling over great extent will produce negative consequence even have a strong impact on.Therefore, the method that prevents roof falling over great extent that needs a kind of optimization.
Summary of the invention
To preventing roof falling over great extent, the present invention proposes a kind of anti-method that falls that collapses of optimization for better.May further comprise the steps:
(1) stay in the big lane of mine and establish protection coal column 35-45m, the face of adopting reclaims the back that finishes and builds by laying bricks or stones airtight by the carrying wall standard;
(2) adopt to stay between the face and establish pure coal column 15-20m and radial half coal column 18-23m;
(3) the crossheading coal column is protected in reservation, looks pressure condition during recovery and reduces the rate of recovery;
(4) stay and establish fender 500-900mm between cave;
(5) offset is established the zone isolation coal column every 450-550m, and the width of zone isolation coal column is not less than 15m;
(6) timely airtight entrance to a lane, the span larger part increases pin.
Preferably, under the offset in goaf, the position is distal to the 10m place even arrives entrance to a lane in entrance to a lane with the mud in the tunnelling process, bastard coal whole fill.
The inventive method can prevent roof falling over great extent, thereby can avoid the serious consequence that causes because of roof falling over great extent, has guaranteed the mining conditions of the face of adopting and carrying out smoothly of production.
The specific embodiment
The embodiment of the invention is the method that prevents roof falling over great extent that is used for the bank.
Because immediate roof is the compound roof structure, roof caving normally directly the top collapse, and the position that falls of collapsing is usually located at offset connection entrance to a lane inward, locate outward, collapses the layer position that fall from lower to upper.But when the outstanding top of old dead zone large tracts of land, when pressure surpassed its enabling capabilities, old dead zone top plate produced very big adverse effect with large area caving.For overcoming existing problem, the method that prevents roof falling over great extent of the specific embodiment of the invention is taked following steps:
Stay in the big lane of mine and to establish the protection coal column and be not less than 35m, the face of adopting reclaims the back that finishes and builds by laying bricks or stones airtight by the carrying wall standard.
Establish pure coal column and be not less than 15m and radial half coal column 20m adopting to stay between the face, adopt the independence of face to guarantee each, thereby prevent the large area caving of top board.
The crossheading coal column is protected in reservation, reclaims in the lump when this coal column is treated back production, and the situation of exerting pressure during recovery suitably reduces the rate of recovery, with guarantee the left and right stope not simultaneously integral body stride and collapse.
Stay and establish fender 700m between cave, make full use of the effect of carrying certainly of light section balkstone, guarantee not inbreak of top board when back production, back production can be carried out smoothly.In addition, this fender can also assist coal-winning machine to coaling, and reduces the goaf float coal and piles up.
Offset is established the zone isolation coal column every 500m, and the width of zone isolation coal column is not less than 15m, thereby more effectively prevents roof falling over great extent.
In time airtight to entrance to a lane, increase pin at the span larger part.
Under the offset in goaf, the position is leaned on offset 10m place or a farther entrance to a lane of arriving inward as much as possible, it can be tried one's best connect the top as early as possible with the mud in the tunnelling process, bastard coal whole fill, and filling is tangible.
More advantageously, often carry out the observation of roof pressure observation and old top absciss layer, and note the various top boards sign that collapses at any time, when the large area caving sign, carry out preventive works in advance.
This method has been controlled top board effectively after implement the bank, prevented roof falling over great extent, guarantees carrying out smoothly of production.

Claims (2)

1. a method that prevents roof falling over great extent is characterized in that, may further comprise the steps:
(1) stay at Da Xiang and establish protection coal column 35-45m, the face of adopting reclaims the back that finishes and builds by laying bricks or stones airtight by the carrying wall standard;
(2) adopt to stay between the face and establish pure coal column 15-20m and radial half coal column 18-23m;
(3) the crossheading coal column is protected in reservation, looks pressure condition during recovery and suitably reduces the rate of recovery;
(4) stay and establish fender 500-900mm between cave;
(5) offset is established the zone isolation coal column every 450-550m, and the width of zone isolation coal column is not less than 15m;
(6) timely airtight entrance to a lane, the span larger part increases pin.
2. the method that prevents roof falling over great extent according to claim 1 is characterized in that: under the offset in goaf, the position is distal to the 10m place even arrives entrance to a lane in entrance to a lane with the mud in the tunnelling process, bastard coal whole fill.
CNB2004100584926A 2004-08-19 2004-08-19 Method for preventing top plate from large area collapsing Active CN100535388C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2004100584926A CN100535388C (en) 2004-08-19 2004-08-19 Method for preventing top plate from large area collapsing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2004100584926A CN100535388C (en) 2004-08-19 2004-08-19 Method for preventing top plate from large area collapsing

Publications (2)

Publication Number Publication Date
CN1737334A true CN1737334A (en) 2006-02-22
CN100535388C CN100535388C (en) 2009-09-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
CNB2004100584926A Active CN100535388C (en) 2004-08-19 2004-08-19 Method for preventing top plate from large area collapsing

Country Status (1)

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CN (1) CN100535388C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106150545A (en) * 2016-08-05 2016-11-23 太原理工大学 A kind of method carrying out goaf part filling according to roof caving feature
CN106150546A (en) * 2016-08-05 2016-11-23 太原理工大学 A kind of method carrying out goaf part filling according to earth's surface subsidence

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106150545A (en) * 2016-08-05 2016-11-23 太原理工大学 A kind of method carrying out goaf part filling according to roof caving feature
CN106150546A (en) * 2016-08-05 2016-11-23 太原理工大学 A kind of method carrying out goaf part filling according to earth's surface subsidence
CN106150546B (en) * 2016-08-05 2018-05-04 太原理工大学 A kind of method that the filling of goaf part is carried out according to earth's surface subsidence

Also Published As

Publication number Publication date
CN100535388C (en) 2009-09-02

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