CN102135005A - Method for supporting roof of roadway under coal pillar and gob transition section - Google Patents
Method for supporting roof of roadway under coal pillar and gob transition section Download PDFInfo
- Publication number
- CN102135005A CN102135005A CN 201110057953 CN201110057953A CN102135005A CN 102135005 A CN102135005 A CN 102135005A CN 201110057953 CN201110057953 CN 201110057953 CN 201110057953 A CN201110057953 A CN 201110057953A CN 102135005 A CN102135005 A CN 102135005A
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- roadway
- roof
- expansion anchor
- hydraulic expansion
- boring
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- 239000003245 coal Substances 0.000 title claims abstract description 31
- 230000008093 supporting effect Effects 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000007704 transition Effects 0.000 title abstract 3
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 38
- 239000010959 steel Substances 0.000 claims abstract description 38
- 238000005553 drilling Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 238000010276 construction Methods 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 5
- 230000000295 complement effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 abstract 1
- 238000004080 punching Methods 0.000 abstract 1
- 238000004873 anchoring Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000003325 tomography Methods 0.000 description 2
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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Abstract
The invention relates to a method for supporting a roof of a roadway under a coal pillar and gob transition section. The method comprises the steps of: firstly, drilling holes at the bottom of a roof of a forward roadway parallel to the axis of the roadway, inserting round steel tubes into drill holes and tightly wedging the round steel tubes to form an advance temporary support; heading one footage forwards to pave a metal mesh and steel strips which are close to the roof, and punching the roof of the roadway via the apertures of the steel strips, installing hydraulic expansion anchor rods into the drill holes in sequence, and then injecting high-pressure water into the hydraulic expansion anchor rods one by one; after the roadway is headed at a certain distance, drilling holes at the bottom of the roof of the forward roadway parallel to the axis of the roadway, continuously inserting the round steel tubes, and repeating the steps until the support for the roof of the roadway under the coal pillar and gob transition section is completed. The method is especially suitable for supporting the roof of the roadway when a coal heading face at ultrathin layer intervals passes through the junction of upper coal pillars and a gob and supporting the roof of the roadway when the heading face passes through faults and carbonless piles. The method is simple and easy to operate, and excellent in supporting effect.
Description
Technical field
The present invention relates to a kind of coal column and goaf changeover portion below back supporting method, especially be suitable for the next coal bed drift face of thin layer spacing by on back supporting when covering coal column and goaf intersection, also can be applicable to the back supporting of driving face when crossing the carbon-free post of tomography, mistake.
Background technology
Along with the propelling of stope, directly top, basic top collapse to fall in succession.At stope middle part, the compacting gluing again after after a while of the spoil that falls collapses; But at the work plane two ends, owing to influenced by the support of section coal pillar or circle, ore deposit coal column, the spoil burden pressure that falls of collapsing is less, compacting gluing again, and the space is bigger.Less than 1.5m point blank coal seam group mining the time, because it is broken that the back of coal column and goaf changeover portion below is influenced by dynamic pressure, its joint fissure and on cover the goaf and link up, and adopt and often have ponding in the sky, the next heading top board is soaked by ponding, intensity reduces greatly, and top board is with digging with emitting the roadway support difficulty.In addition, stride at the goaf of this changeover portion inside ceiling panel and to fall behind glued unreally, the space is bigger, and the conventional resins anchoring rod and does not have origin of force because the anchoring agent is fallen easily partially in big goaf, space, can not effective support.Therefore, the roof timbering of the next heading is very crucial.Usually taked shed shoring for this situation in the past, but shed shoring belongs to passive protecting, less to the active force of top board, only after crushing, could carry.And below coal column and goaf intersection, influenced by trickle, the top also often appears leaking in shed shoring.
Summary of the invention
Technical problem: the objective of the invention is to overcome the weak point in the prior art, the back support technology that is used for coal column and goaf changeover portion below that a kind of method is simple, easy to operate, supporting effect is good is provided.
Technical scheme: coal column of the present invention and goaf changeover portion below back supporting method comprise the steps:
A. at first being parallel to axis direction interval, tunnel construction depth bottom the back below coal column and goaf changeover portion is the boring of 3000mm, and the spacing of boring is 150～200mm;
B. use the round steel pipe that is complementary with the bore diameter and the degree of depth to insert in the good boring of construction, and by voussoir with the round steel pipe wedging, form leading temporary lining;
C. under leading temporary lining effect, in the tunnel, tunnel a drilling depth forward;
D. the back that tunnels out is laid wire lath, with the form of array pitch, be furnished with the aperture with an interval earlier and the steel band that matches with the hydraulic expansion bolt diameter is held wire lath, and steel band withstood by hydraulic prop;
E. hole to the back perforating from the aperture of steel band successively, the hole depth of boring and hydraulic expansion rock-bolt length are complementary;
F. successively the hydraulic expansion anchor pole is packed in the boring, and make steel band be adjacent to top board by the pallet of hydraulic expansion anchor pole;
G. utilize the fluid injection connector one by one in the hydraulic expansion anchor pole injection pressure be 20～22MPa water, the fluid injection time is no less than 2min;
H. carry out the driving of next drilling depth, repeat above-mentioned steps d, e, f, g, carry out the installation of the hydraulic expansion anchor pole (2) of next array pitch;
J. after 2.0～2.1m is whenever tunneled forward in the tunnel, be parallel to the boring of tunnel axis direction construction continued access round steel pipe (1) in the back bottom, continued access round steel pipe (1) is installed, and with its wedging;
K. go round and begin again, until finishing the back supporting of coal column and goaf changeover portion below;
Array pitch between described steel band and the steel band is 500～700mm.
Beneficial effect: the invention provides a kind of brand-new back support technology that is used for coal column and goaf changeover portion below.Less than 1.5m point blank coal seam group mining the time, because it is broken that the back of coal column and goaf changeover portion below is influenced by dynamic pressure, and adopt and often have ponding in the sky, top board is with digging with emitting, the roadway support difficulty, the present invention utilizes slotting round steel pipe method to solve this difficult problem.Cover the goaf inside ceiling panel in addition and stride and fall behind glued unreally on this changeover portion, the space is bigger, and the conventional resins anchoring rod and does not have origin of force because the anchoring agent is fallen easily partially in big goaf, space, can not effective support.The present invention utilizes the hydraulic expansion anchor pole to solve this technical barrier.The present invention not only be suitable for the next coal bed drift face of thin layer spacing by on back supporting when covering coal column and goaf intersection, also be applicable to the back supporting when driving face is crossed the carbon-free post of tomography, mistake.Its method is simple, easy to operate, supporting effect is good, has practicality widely.
Description of drawings
Fig. 1 is the roof timbering schematic diagram axial along the tunnel of the present invention.
Fig. 2 is a back supporting floor map of the present invention.
Fig. 3 is the A-A generalized section of Fig. 1.
Among the figure: 1-round steel pipe, 2-hydraulic expansion anchor pole, 3-roadway floor, 4-steel band.
The specific embodiment
Below in conjunction with accompanying drawing one embodiment of the present of invention are further described:
Shown in Figure 1, round steel pipe 1 is inserted in the top board perforating boring of the present invention above roadway floor 3, lay wire lath then, set up steel band 4, in the jay rock mass, add 2 supportings of hydraulic expansion anchor pole on this basis, finish the back supporting of coal column and goaf changeover portion below.Concrete steps are as follows:
A. be that the drill bit of 32mm cooperates the wind coal borer to be parallel to the boring of tunnel axis direction construction one row 3000mm length to coal column and back bottom, goaf changeover portion below with diameter at first, the spacing of boring is 150～200mm;
B. the round steel pipe 1 of diameter 1 inch, long 3000mm is inserted in the boring, and, formed leading temporary lining its wedging;
C. under leading temporary lining effect, in the tunnel, tunnel a drilling depth 600mm forward;
D. the back that excavates being laid the two-tier rhombic wire lath, is that 40mm * 60mm, pitch of holes are that the W steel band of 750mm is held wire lath with an aperture, by hydraulic prop the W steel band is withstood again, makes it be adjacent to top board;
E. be that the drill bit of 40mm cooperates rig to hole to the back perforating from the aperture of this row W steel band successively with diameter, hole depth is 2500mm;
F. successively the hydraulic expansion anchor pole 2 of the long 2500mm of diameter 30mm is packed in each boring, and make the W steel band be adjacent to top board with the pallet of hydraulic jack by hydraulic expansion anchor pole 2;
G. by the fluid injection connector one by one in hydraulic expansion anchor pole 2 injection pressure be the water under high pressure of 20～22MPa, the fluid injection time of each hydraulic expansion anchor pole is no less than 2min;
H. finish after a draining power expansion anchor rod 2 installations, carry out the driving of next drilling depth;
I. repeat above-mentioned steps d, e, f, g, carry out the installation of next draining power expansion anchor rod 2, the array pitch between steel band 4 and the steel band 4 is 500～700mm;
J. after 2.0 ~ 2.1m is tunneled forward in the tunnel, the back bottom is parallel to tunnel axis direction construction drill meeting head on, the continuous round steel pipe of inserting, and with its wedging, carry out the driving of next drilling depth then, the installation of next draining power expansion anchor rod goes round and begins again, until the back supporting of finishing coal column and goaf changeover portion below.
Claims (1)
1. coal column and goaf changeover portion below back supporting method is characterized in that comprising the steps:
A. at first being parallel to axis direction interval, tunnel construction depth bottom the back below coal column and goaf changeover portion is the boring of 3000mm, and the spacing of boring is 150～200mm;
B. use the round steel pipe (1) that is complementary with the bore diameter and the degree of depth to insert in the good boring of construction, and by voussoir with round steel pipe (1) wedging, form leading temporary lining;
C. under leading temporary lining effect, in the tunnel, tunnel a drilling depth forward;
D. the back that tunnels out is laid wire lath,, be furnished with the aperture with one earlier and hold wire lath, and steel band (4) is withstood by hydraulic prop with the steel band (4) that hydraulic expansion anchor pole (2) diameter matches with the form of array pitch;
E. hole to the back perforating from the aperture of steel band (4) successively, the hole depth of boring and hydraulic expansion anchor pole (2) length are complementary;
F. successively hydraulic expansion anchor pole (2) is packed in the boring, and make steel band be adjacent to top board by the pallet of hydraulic expansion anchor pole (2);
G. utilize the fluid injection connector one by one in hydraulic expansion anchor pole (2) injection pressure be 20～22MPa water, the fluid injection time is no less than 2min;
H. carry out the driving of next drilling depth, repeat above-mentioned steps d, e, f, g, carry out the installation of the hydraulic expansion anchor pole (2) of next array pitch;
J. after 2.0～2.1m is whenever tunneled forward in the tunnel, be parallel to the boring of tunnel axis direction construction continued access round steel pipe (1) in the back bottom, continued access round steel pipe (1) is installed, and with its wedging;
K. go round and begin again, until finishing the back supporting of coal column and goaf changeover portion below;
Coal column according to claim 1 and goaf changeover portion below back supporting method, it is characterized in that: the array pitch between described steel band and the steel band is 500～700mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100579538A CN102135005B (en) | 2011-03-11 | 2011-03-11 | Method for supporting roof of roadway under coal pillar and gob transition section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100579538A CN102135005B (en) | 2011-03-11 | 2011-03-11 | Method for supporting roof of roadway under coal pillar and gob transition section |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102135005A true CN102135005A (en) | 2011-07-27 |
| CN102135005B CN102135005B (en) | 2012-07-25 |
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| CN2011100579538A Expired - Fee Related CN102135005B (en) | 2011-03-11 | 2011-03-11 | Method for supporting roof of roadway under coal pillar and gob transition section |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900449A (en) * | 2012-10-11 | 2013-01-30 | 北京圆之翰煤炭工程设计有限公司 | Support method for underground goaf roof of coal mine |
| CN103016008A (en) * | 2012-12-20 | 2013-04-03 | 大同煤矿集团有限责任公司 | Mining stopping method for downwards mined underlying seams of coal seam group |
| CN104847354A (en) * | 2015-04-03 | 2015-08-19 | 山东科技大学 | Method for improving performance of strip coal pillar by grouting combined support anchor rod |
| CN106837333A (en) * | 2017-01-17 | 2017-06-13 | 济宁矿业集团有限公司霄云煤矿 | A kind of fully-mechanized mining working pre-tunnel laneway road formula passing fault method |
| CN106884670A (en) * | 2017-03-06 | 2017-06-23 | 西安科技大学 | A kind of support method for underground goaf roof of coal mine |
| CN107023311A (en) * | 2017-06-08 | 2017-08-08 | 刘冲 | Roadway repair method below coal column |
| CN107060758A (en) * | 2017-04-18 | 2017-08-18 | 辽宁工程技术大学 | A kind of section fender, which is stayed, sets construction method |
| CN113153315A (en) * | 2021-04-26 | 2021-07-23 | 中国矿业大学 | Deep large-section hole-cutting roadway-forming mode and method for determining supporting time |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900449A (en) * | 2012-10-11 | 2013-01-30 | 北京圆之翰煤炭工程设计有限公司 | Support method for underground goaf roof of coal mine |
| CN102900449B (en) * | 2012-10-11 | 2014-07-23 | 北京圆之翰煤炭工程设计有限公司 | Support method for underground goaf roof of coal mine |
| CN103016008A (en) * | 2012-12-20 | 2013-04-03 | 大同煤矿集团有限责任公司 | Mining stopping method for downwards mined underlying seams of coal seam group |
| CN104847354A (en) * | 2015-04-03 | 2015-08-19 | 山东科技大学 | Method for improving performance of strip coal pillar by grouting combined support anchor rod |
| CN104847354B (en) * | 2015-04-03 | 2018-02-02 | 山东科技大学 | A kind of method that strip coal pillar performance is lifted using slip casting combined supporting anchor pole |
| CN106837333A (en) * | 2017-01-17 | 2017-06-13 | 济宁矿业集团有限公司霄云煤矿 | A kind of fully-mechanized mining working pre-tunnel laneway road formula passing fault method |
| CN106884670A (en) * | 2017-03-06 | 2017-06-23 | 西安科技大学 | A kind of support method for underground goaf roof of coal mine |
| CN107060758A (en) * | 2017-04-18 | 2017-08-18 | 辽宁工程技术大学 | A kind of section fender, which is stayed, sets construction method |
| CN107023311A (en) * | 2017-06-08 | 2017-08-08 | 刘冲 | Roadway repair method below coal column |
| CN113153315A (en) * | 2021-04-26 | 2021-07-23 | 中国矿业大学 | Deep large-section hole-cutting roadway-forming mode and method for determining supporting time |
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| Publication number | Publication date |
|---|---|
| CN102135005B (en) | 2012-07-25 |
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