CN102425428A - Method for controlling extreme broken roof in roadway head - Google Patents
Method for controlling extreme broken roof in roadway head Download PDFInfo
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- CN102425428A CN102425428A CN2011102829044A CN201110282904A CN102425428A CN 102425428 A CN102425428 A CN 102425428A CN 2011102829044 A CN2011102829044 A CN 2011102829044A CN 201110282904 A CN201110282904 A CN 201110282904A CN 102425428 A CN102425428 A CN 102425428A
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Abstract
The invention discloses a method for controlling breaking roof in roadway head. The method comprise the steps of: firstly, distributing anchor bolt support drill holes on a roadway tunneling head; then, arranging a common self-drilling anchor rod in the outermost row of vertical drill holes so as to match a steel bar belt for temporary roof protection; and finally, arranging a self-drilling grouting anchor rod in the rest rows of inclined drill holes and grouting towards the broken roof ahead. The method disclosed by the invention has the positive effects that by arranging the vertical self-drilling anchor rod by means of the tunneling head and matching with the steel bar belts with a maintenance function, an active maintenance role is played for the roof, the completeness of the head is effectively protected, and the safety of staff is ensured; and by means of inclined grouting, the undisturbed broken roof at the deep part of the head is reinforced, the roof strata strength is increased, broken and cracked rock masses deep in a roadway are reinforced into a complete rock strata, and safety guarantee is provided for the forward tunneling of the roadway.
Description
Technical field
The invention belongs to the mining technical field.
Background technology
At present in the mining; Increase the increasing (greater than 15-20 square) of (greater than 800 meters), drift section along with mining depth; In the driving face progradation, stope equipment is installed and progradation in and in the road maintenance process, often run into the heavily stressed visualization area that geological structure causes, the very big broken phenomenon of top board appears; Cause part or large tracts of land roof fall accident, potential safety hazard occurs.Measures such as artificial filling, temporary lining are mainly taked in the control of such accident at present.When the unusual region of high stress and complicated structure are met head on to exist in the tunnel, adopt present method to be difficult to achieve effective control, cause support material waste and manpower consumption.In the applying of big mining height mining machinesization; These conventional measures are owing to operating difficulties, danger are difficult to defectives such as control; Often treatment of roof collapse is untimely, often brings out secondary disaster, causes the vicious circle of Roof Control; And large-scale roof accident takes place easily, cause great loss.
Therefore need invention a kind of to breaking roof in time, maintaining method fast and effectively.
Summary of the invention
The objective of the invention is control problem to the very big breaking roof of high stress areas of present deep tunnel, proposes a kind of in time, effective control method apace.
Technical scheme of the present invention is:
The first step: meet head on to arrange bolt support boring in tunnelling
In the tunnelling process; When finding that top board cranny development, breaking small range of scale, prop unusual, damage envelope occurs and meet head on the deep when extending to the tunnel, arrange 3-4 gang drill hole, spacing of wells 0.8m at the tunnelling top board of meeting head on; Boring array pitch 0.8-1.0m, drilling depth is 3.0-5.0m; Outermost one gang drill hole direction is perpendicular to scar, all the other gang drill holes with 60-75 degree angle to oblique upper to creeping into;
Second step: install from boring common bolt cooperation reinforcing bar band and protect the top temporarily
In outermost one row vertical drilling, self drilling anchor is installed, is adopted Roofbolt drilling rig vertically to creep into, reach rock-bolt length after, the reinforcing bar band is routed on the top board tray in the anchor pole end, and fastening nut; Described solid for what use always from boring common bolt from boring common bolt;
The 3rd step: install from boring grouted anchor bar
In all the other row's inclined drills, install, adopt Roofbolt drilling rig to cooperate and carry out inclined drilling from boring grouted anchor bar from boring grouted anchor bar, reach rock-bolt length after, stop to creep into, then the reinforcing bar band is routed on the top board tray in the anchor pole end, and fastening nut; Boring grouted anchor bar outer end connection grouting device certainly, forwards carry out slip casting in the breaking roof again;
The described slurry outlet that bores grouted anchor bar certainly is located at the middle epimere of hollow rod body, forms the form of structure that the deep can be annotated, superficial part is not annotated.
Good effect of the present invention is: 1. through vertical self drilling anchor is installed at boring head, and cooperate the reinforcing bar band of maintenance function, top board is played the active maintenance effect, what effectively prevent to meet head on is complete, has guaranteed staff's safety.2. through inclination slip casting, reinforced the intact breaking roof in the deep of meeting head on, improved roof strata intensity, to the fragmentation in deep, tunnel, crack rock people for being solidified into complete rock stratum, for the driving forward in next step tunnel provides safety guarantee.
Description of drawings
Further specify embodiments of the invention below in conjunction with accompanying drawing.
Fig. 1 is driving face and self drilling anchor orientation sketch map;
Fig. 2 is the self drilling anchor structure chart;
Fig. 3 is a reinforcing bar band sketch map.
The specific embodiment
Shown in Fig. 1-3, the meet head on concrete steps of damaged top boad control method of tunnel of the present invention are:
The first step: meet head on to arrange bolt support boring in tunnelling
In the tunnelling process; When finding that top board cranny development, breaking small range of scale, prop unusual, damage envelope occurs and meet head on the deep when extending (as shown in Figure 1) to the tunnel; Arrange 3-4 gang drill hole at the tunnelling top board of meeting head on; Spacing of wells 0.8m, boring array pitch 0.8-1.0m, drilling depth is 3.0-5.0m; Outermost one gang drill hole direction is perpendicular to scar, all the other gang drill holes with 60-75 degree angle to oblique upper to creeping into;
Second step: install from boring common bolt cooperation reinforcing bar band and protect the top temporarily
In outermost one row vertical drilling, self drilling anchor is installed, is adopted Roofbolt drilling rig vertically to creep into, reach rock-bolt length after, the reinforcing bar band is routed on the top board tray in the anchor pole end, and fastening nut.Described from boring the certainly brill common bolt of common bolt for using always.Solid in boring common bolt by forming from drill bit, linkage, the solid body of rod, pallet, nut, bore the combined structural member that common bolt adopts length to cooperate certainly, choose pattern length flexibly according to the roof cracking degree of depth.
The reinforcing bar band plays the maintenance effect to breaking roof, and the effect of anti-leak-stopping cash is arranged, and working space is played effective protection.The reinforcing bar band is processed the reinforcing bar band with ￠ 8mm round steel, long 1400mm, and wide 300mm, Fig. 3 is seen in the two ends embowment.
The 3rd step: install from boring grouted anchor bar
In all the other row's inclined drills, install, adopt Roofbolt drilling rig to cooperate and carry out inclined drilling from boring grouted anchor bar from boring grouted anchor bar, reach rock-bolt length after; Stop to creep into; Then the reinforcing bar band is routed on the top board, stop grouting plug, pallet and fastening nut are installed in the anchor pole end; Boring grouted anchor bar outer end connection grouting device certainly, forwards carry out slip casting in the breaking roof again;
By forming, and on the hollow rod body of middle epimere, be provided with slurry outlet, the form of structure of formation deep slip casting, not slip casting of superficial part from the structure of boring grouted anchor bar from drill bit, linkage, hollow rod body, stop grouting plug, pallet, nut.
Claims (1)
1. tunnel damaged top boad control method of meeting head on is characterized in that step is following:
The first step: meet head on to arrange bolt support boring in tunnelling
In the tunnelling process; When finding that top board cranny development, breaking small range of scale, prop unusual, damage envelope occurs and meet head on the deep when extending to the tunnel, arrange 3-4 gang drill hole, spacing of wells 0.8m at the tunnelling top board of meeting head on; Boring array pitch 0.8-1.0m, drilling depth is 3.0-5.0m; Outermost one gang drill hole direction is perpendicular to scar, all the other gang drill holes with 60-75 degree angle to oblique upper to creeping into;
Second step: install from boring common bolt cooperation reinforcing bar band and protect the top temporarily
In outermost one row vertical drilling, self drilling anchor is installed, is adopted Roofbolt drilling rig vertically to creep into, reach rock-bolt length after, the reinforcing bar band is routed on the top board tray in the anchor pole end, and fastening nut; Described solid for what use always from boring common bolt from boring common bolt;
The 3rd step: install from boring grouted anchor bar
In all the other row's inclined drills, install, adopt Roofbolt drilling rig to cooperate and carry out inclined drilling from boring grouted anchor bar from boring grouted anchor bar, reach rock-bolt length after, stop to creep into, then the reinforcing bar band is routed on the top board tray in the anchor pole end, and fastening nut; Boring grouted anchor bar outer end connection grouting device certainly, forwards carry out slip casting in the breaking roof again;
The described middle epimere that is located at hollow rod body from the slurry outlet that bores grouted anchor bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102829044A CN102425428A (en) | 2011-09-12 | 2011-09-12 | Method for controlling extreme broken roof in roadway head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102829044A CN102425428A (en) | 2011-09-12 | 2011-09-12 | Method for controlling extreme broken roof in roadway head |
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| Publication Number | Publication Date |
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| CN102425428A true CN102425428A (en) | 2012-04-25 |
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| CN2011102829044A Pending CN102425428A (en) | 2011-09-12 | 2011-09-12 | Method for controlling extreme broken roof in roadway head |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102877857A (en) * | 2012-09-24 | 2013-01-16 | 山西晋城无烟煤矿业集团有限责任公司 | Deep hole pre-grouting top plate reinforcement method for large-mining height working face under special geological conditions |
| CN103628897A (en) * | 2013-12-06 | 2014-03-12 | 中国矿业大学 | Method for passing through top-coal caving region of roadway |
| CN109798131A (en) * | 2019-01-22 | 2019-05-24 | 淮南矿业(集团)有限责任公司 | Help grouting strengthening method in a kind of three-soft seam large-mining-height working surface top |
| CN110513129A (en) * | 2019-09-26 | 2019-11-29 | 黄祖军 | A kind of loose thick coal layer roadway workface fore-support supporting construction and method for protecting support |
| CN114294018A (en) * | 2021-12-30 | 2022-04-08 | 中国矿业大学 | Method for rapid passing of advanced dense top protection layer grouting in loose slip region |
Citations (7)
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| US4193715A (en) * | 1978-05-12 | 1980-03-18 | The Eastern Company | Mine roof support method and apparatus |
| CN1400378A (en) * | 2002-08-28 | 2003-03-05 | 李庆才 | Mine roadway steel reinforcement support anchoring method |
| CN1693670A (en) * | 2005-05-19 | 2005-11-09 | 中国矿业大学 | Three-anchor coupling supporting method for high stress tunnel break wall rock |
| CN1878930A (en) * | 2003-11-13 | 2006-12-13 | 阿特拉斯科普科凿岩机股份公司 | Method and device for installing a self-drilling expandable rock bolt and a self-drilling rock bolt |
| CN201170106Y (en) * | 2008-03-28 | 2008-12-24 | 尚海峰 | Laneway anchor rod support system |
| CN101871353A (en) * | 2010-06-22 | 2010-10-27 | 宋彦波 | Method for soft rock roadway grouting and full-length prestress baseboard anchor cable comprehensive support |
| CN102155247A (en) * | 2011-03-15 | 2011-08-17 | 李刚 | Pipe shed support device |
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2011
- 2011-09-12 CN CN2011102829044A patent/CN102425428A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4193715A (en) * | 1978-05-12 | 1980-03-18 | The Eastern Company | Mine roof support method and apparatus |
| CN1400378A (en) * | 2002-08-28 | 2003-03-05 | 李庆才 | Mine roadway steel reinforcement support anchoring method |
| CN1878930A (en) * | 2003-11-13 | 2006-12-13 | 阿特拉斯科普科凿岩机股份公司 | Method and device for installing a self-drilling expandable rock bolt and a self-drilling rock bolt |
| CN1693670A (en) * | 2005-05-19 | 2005-11-09 | 中国矿业大学 | Three-anchor coupling supporting method for high stress tunnel break wall rock |
| CN201170106Y (en) * | 2008-03-28 | 2008-12-24 | 尚海峰 | Laneway anchor rod support system |
| CN101871353A (en) * | 2010-06-22 | 2010-10-27 | 宋彦波 | Method for soft rock roadway grouting and full-length prestress baseboard anchor cable comprehensive support |
| CN102155247A (en) * | 2011-03-15 | 2011-08-17 | 李刚 | Pipe shed support device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102877857A (en) * | 2012-09-24 | 2013-01-16 | 山西晋城无烟煤矿业集团有限责任公司 | Deep hole pre-grouting top plate reinforcement method for large-mining height working face under special geological conditions |
| CN103628897A (en) * | 2013-12-06 | 2014-03-12 | 中国矿业大学 | Method for passing through top-coal caving region of roadway |
| CN109798131A (en) * | 2019-01-22 | 2019-05-24 | 淮南矿业(集团)有限责任公司 | Help grouting strengthening method in a kind of three-soft seam large-mining-height working surface top |
| CN109798131B (en) * | 2019-01-22 | 2020-09-08 | 淮南矿业(集团)有限责任公司 | Top slope grouting reinforcement method for large mining height working face of three-soft coal seam |
| CN110513129A (en) * | 2019-09-26 | 2019-11-29 | 黄祖军 | A kind of loose thick coal layer roadway workface fore-support supporting construction and method for protecting support |
| CN110513129B (en) * | 2019-09-26 | 2024-04-02 | 黄祖军 | Advanced roof-protecting supporting structure and method for roadway of soft and thick coal seam working face |
| CN114294018A (en) * | 2021-12-30 | 2022-04-08 | 中国矿业大学 | Method for rapid passing of advanced dense top protection layer grouting in loose slip region |
| CN114294018B (en) * | 2021-12-30 | 2024-01-26 | 中国矿业大学 | Quick grouting passing method for advanced dense top protection layer in loose sliding area |
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Application publication date: 20120425 |