CN1693670A - Three-anchor coupling supporting method for high stress tunnel break wall rock - Google Patents

Three-anchor coupling supporting method for high stress tunnel break wall rock Download PDF

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Publication number
CN1693670A
CN1693670A CN 200510040159 CN200510040159A CN1693670A CN 1693670 A CN1693670 A CN 1693670A CN 200510040159 CN200510040159 CN 200510040159 CN 200510040159 A CN200510040159 A CN 200510040159A CN 1693670 A CN1693670 A CN 1693670A
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CN
China
Prior art keywords
anchor
rock
bolting
tunnel
wire mesh
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Application number
CN 200510040159
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Chinese (zh)
Inventor
靖洪文
陈坤福
韩立军
许国安
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中国矿业大学
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Application filed by 中国矿业大学 filed Critical 中国矿业大学
Priority to CN 200510040159 priority Critical patent/CN1693670A/en
Publication of CN1693670A publication Critical patent/CN1693670A/en

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Abstract

This invention is a three-anchor-coupling supporting method for high stress tunnel break wall rock. Small section digging is used, roof deformation is controlled by reinforce the support of roof plate to lighten the stress concentration of two sides coal bodies. Pressure relief holes that allow wall rock to deform and damage are drilled on both sides to release the high stress in wall rack, then construction of big brush and consolidation is done. Roof and bottom angles are reinforced support in stress releasing course to effectively control deformation and damage of tunnel roof for stabilizing wall rock. bolt-spray supports anchor cable consolidation and anchor inject support in coal road and soft rock supporting is combined as one piece. Its coupled relation is fully exerted and the support problem of conforming complicated area and deep buried high stress cracking wall rack or soft tunnel. Its stability is strong, operability is strong, it is safe and reliable can meet the stability needs of roadway in complicated conditions.

Description

The high stress tunnel break wall rock three-anchor coupling supporting method

Technical field

The present invention relates to the high stress tunnel break wall rock three-anchor coupling supporting method, be particularly useful for the supporting of mine complex region and buried heavily stressed breaking surrounding rock or soft-rock tunnel.

Background technology

Complex structure zone and buried heavily stressed wall rock laneway support have become an outstanding difficult problem that faces in the production at present.Such tunnel adopts the supporting of traditional U shaped steel, anchor rete cord or bolt-grouting support can't satisfy stable requirement, has had a strong impact on the safety in production of mine and the raising of economic benefit.

Summary of the invention

The high stress tunnel break wall rock three-anchor coupling supporting method that the purpose of this invention is to provide a kind of bolt-spary supports, anchor cable reinforcing and bolt-grouting support.

The step of high stress tunnel break wall rock three-anchor coupling supporting method of the present invention is as follows:

(1) light section tunnelling construction is carried out in segmentation, adopts the back spacing distance of anchor pole and reinforcing bar ladder and the timely light section construction section of wire lath to carry out first bolting with wire mesh;

(2) allow country rock to produce the pressure relief vent of deformation and failure along helping spacing distance to drill through the light section tunnel two behind the first bolting with wire mesh of top board;

(3) treat two help country rock to produce the distortion release after, the brushing section carries out full section secondary bolting with wire mesh with anchor pole and reinforcing bar ladder and wire lath on the cross sections of bolting with wire mesh for the first time, enforcement two is helped, the bolting with wire mesh at drift angle and base angle;

(4) on each cross section, roof rock mass is carried out prestressed anchor reinforcement with anchor cable;

(5) finish the full face bolting with wire mesh in tunnel after, grouted anchor bar in the top board in the cross section between bolting with wire mesh, two is helped to install with base angle spacing distance perforating, and carry out grouting and reinforcing, make along digging laneway at interval cross sections and cross sections between form the coupling supporting that bolting with wire mesh and bolt-grouting support replace.For the violent part tunnel of distortion, local increasing arranged interior grouted anchor bar, carries out multiple notes behind the sealing of hole again.

High stress tunnel break wall rock three-anchor coupling supporting method of the present invention, big at buried depth, complex structure, country rock roof cracking characteristics, adopt " control top release " to discharge method heavily stressed and that " three anchors " coupling supporting is reinforced country rock and reinforced support in key position, utilization " control top release " mode, in the tunnelling process, adopt first light section driving and supporting, and help to be drilled with the pressure relief vent that allows country rock to produce deformation and failure two, heavily stressed obtaining in the country rock discharged, brush construction technology big and reinforcing then, in stress-relief process at the top, the base angle adds strong supporting, effectively the deformation and failure of control back reaches the purpose of stablizing country rock.Bolt-spary supports in coal road and the soft rock supporting, anchor cable reinforcing and bolt-grouting support are organically combined, give full play to its relation of intercoupling, solved the supporting problem of complex structure zone and buried heavily stressed breaking surrounding rock or soft-rock tunnel.Its stability is strong, workable, safe and reliable, has practicality widely.

Description of drawings

Fig. 1 is first bolting with wire mesh in light section of the present invention tunnel and pressure relief vent schematic diagram.

Fig. 2 is the full section secondary of a present invention bolting with wire mesh schematic diagram.

Fig. 3 is the full section bolt-grouting support of a present invention schematic diagram.

The specific embodiment

Below in conjunction with accompanying drawing one embodiment of the present of invention are further described:

High stress tunnel break wall rock three-anchor coupling supporting method of the present invention, according to on-site actual situations, at first, analyze the deformation failure characteristics and the failure mechanism of roadway surrounding rock by investigation and actual measurement to complex structure zone and buried heavily stressed breaking surrounding rock roadway destruction situation; Utilization wall rock loosening ring support theory utilizes actual measurement wall rock loosening ring value, determines at digging laneway cross section technical data a, b, c, α, β, L 1, L 2, L 3, L 4And grouting parameter; Adopt first light section driving in the work progress and carry out roof timbering, the anchor pole spacing of light section roof timbering is a, selects a=70cm for use; Beat an amount of pressure relief vent at the two anchor pole gap locations of helping, behind the release portion pressure, brush big two and help to set section width and apply bolt-spary supports, the hysteresis certain distance is beaten grouted anchor bar and is carried out slip casting every row; Press the monitoring feedback information to optimize supporting parameter by the ore deposit at last, guarantee the stable of tunnel.Concrete steps are as follows:

(1) the first bolting with wire mesh of light section tunnelling and top board.At first adopt drilling and blasting method to carry out tunneling construction, behind place cleaning, the twisted steel anchor rod 1 of perforating in time and installation top board resin anchoring re-lays wire lath and reinforcing bar ladder 7, and compresses with anchor pole pallet and nut, applies certain prestressing force then; Can select the length L of anchor pole 1 for use 1Be 220cm; After finishing whole supportings and discharge refuse, carry out the driving and the supporting of next circulation again.

(2) release.Suitable pressure relief vent 2 is helped to beat in light section tunnel two behind first bolting with wire mesh.

(3) brushing section and full section secondary bolting with wire mesh.Hysteresis light section driving face 10~15m, after coal body generation explosion, after being release, the brush that carries out drift section again is big, brushing big width b determines according to on-site actual situations, be about 30~60cm, brushing big section mainly constructs with artificial or cooperation pneumatic pick, purpose is to alleviate the destruction of helping coal body to two as far as possible, in time implement drift angle anchor pole 4 then, two help the supporting of anchor pole 5 and base angle anchor pole 6, the vertical angle α that acts on the drift angle anchor pole 4 on the top board is 30 ° with the horizontal sextant angle α that acts on the two drift angle anchor poles 4 of helping, and the horizontal sextant angle of base angle anchor pole 6 is 15 °; Base angle anchor pole 6L 4Can select length for use is 240cm.

(4) roof rock mass prestressed anchor reinforcement.The construction of general prestress anchorage cable can be after finishing full section bolting with wire mesh, and accumulative total in time installs after reaching the array pitch of anchor cable, also can carry out once concentrating augmenting behind the bolting with wire mesh of finishing about 10~15m.During construction, at first hole with jumbolter along the vertical direction of roof strata at the middle part of back, after reaching the design hole depth, unload drilling rod, the order resin explosive roll of packing into, with steel strand resin is delivered to the hole at the bottom of, and steel strand are linked to each other with jumbolter, and then start the rig agitating resin, and steel strand are delivered to the eyeground, realize the anchoring of anchor cable 3.After waiting for about 30min, carry out the stretch-draw of anchor cable 3 again and fix anchor cable 3L 2Can select length for use is 550cm.

(5) anchor pouring reinforcement.After finishing the full face bolting with wire mesh in tunnel; grouted anchor bar 8 in the perforating installation is helped in two of tunnel; the array pitch of grouted anchor bar 8 is the same with resin anchor 5 spacings; and put every arranging; adopt a volume rapid setting cement end anchor, after then the aperture of anchor pole 8 being protected, the sealing of whitewashing; and then utilizing the aperture of the interior grouted anchor bar 8 that exposes to carry out grouting and reinforcing again, the horizontal sextant angle β of drift angle and base angle grouted anchor bar 8 is 15 °.

Adopt during mortar depositing construction from bottom to top, the mode of left and right sides sequential analysis; Anchor pole also adopts from bottom to top in each section, and first base angle two is helped again, is drift angle at last.Spacing distance between cross sections and the cross sections is 0.6~1 meter.For the violent part tunnel of distortion, behind the vertically first anchor pouring reinforcement 15~20m in tunnel, plug hole is arranged grouted anchor bar 8 in multiple the notes again, carries out multiple notes behind the sealing of hole again.

Claims (2)

1. high stress tunnel break wall rock three-anchor coupling supporting method is characterized in that:
(1) light section tunnelling construction is carried out in segmentation, adopts anchor pole (1) and reinforcing bar ladder and wire lath (7) in time the back spacing distance of light section construction section to be carried out first bolting with wire mesh;
(2) allow country rock to produce the pressure relief vent (2) of deformation and failure along helping spacing distance to drill through the light section tunnel two behind the first bolting with wire mesh of top board;
(3) treat two help country rock to produce the distortion release after, the brushing section carries out full section secondary bolting with wire mesh with anchor pole (1) and reinforcing bar ladder and wire lath (7) on the cross sections of bolting with wire mesh for the first time, enforcement two is helped, the bolting with wire mesh at drift angle and base angle;
(4) on each cross section, roof rock mass is carried out prestressed anchor reinforcement with anchor cable (3);
(5) finish the full face bolting with wire mesh in tunnel after, grouted anchor bar (8) in the top board in the cross section between bolting with wire mesh, two is helped to install with base angle spacing distance perforating, and carry out grouting and reinforcing, make along digging laneway at interval cross sections and cross sections between form the coupling supporting that bolting with wire mesh and bolt-grouting support replace.
2. high stress tunnel break wall rock three-anchor coupling supporting method according to claim 1 is characterized in that: for the violent part tunnel of distortion, local increasing arranged interior grouted anchor bar (8), carries out multiple notes behind the sealing of hole again.
CN 200510040159 2005-05-19 2005-05-19 Three-anchor coupling supporting method for high stress tunnel break wall rock CN1693670A (en)

Priority Applications (1)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200510040159 CN1693670A (en) 2005-05-19 2005-05-19 Three-anchor coupling supporting method for high stress tunnel break wall rock

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CN1693670A true CN1693670A (en) 2005-11-09

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Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101122235B (en) * 2007-10-31 2010-05-19 中国矿业大学 Method for controlling wall rock of fully mechanized coal face goaf side coalbed laneway
CN101338679B (en) * 2008-06-26 2011-01-12 王光平 Deep well great section loose wall rock laneway support method
CN102425428A (en) * 2011-09-12 2012-04-25 山东科技大学 Method for controlling extreme broken roof in roadway head
CN102661144A (en) * 2012-04-28 2012-09-12 山东科技大学 Method for determining anchoring depth of anchor cable along deep lane wall of empty crossheading entity coal side
CN102678142A (en) * 2011-12-28 2012-09-19 张千管 Multi-directional inclined combination type anchoring system for horizontal lamellar surrounding rock of tunnel and mounting method thereof
CN102787856A (en) * 2012-08-13 2012-11-21 内蒙古鲁新能源开发有限责任公司 Permanent supporting method of weak cementation soft rock roadway
CN101806223B (en) * 2009-02-17 2013-04-03 中国神华能源股份有限公司 Method for reinforcing return channel
CN103216244A (en) * 2013-03-19 2013-07-24 中国矿业大学 Roadway soft and weak top plate anchoring beam-arch combined structure support system and support method
CN103277124A (en) * 2013-06-06 2013-09-04 武汉科技大学 Anchor-rod-combined supporting method for high-sulfur crush rock mine
CN103628894A (en) * 2013-10-24 2014-03-12 重庆大学 Water-rich fault fracture zone collapsed roadway repairing method based on angle-variable umbrella-shaped advancing grouting
CN103670470A (en) * 2013-12-31 2014-03-26 大同煤矿集团有限责任公司 Full coal roadway safe and speedy drivage supporting method
CN103899329A (en) * 2014-03-24 2014-07-02 中国矿业大学 Large-deformation broken surrounding rock roadway management method
CN104500091A (en) * 2014-12-07 2015-04-08 金川集团股份有限公司 Method for mine underground deep engineering support
CN104695991A (en) * 2015-03-20 2015-06-10 北京昊华能源股份有限公司 Coal mine multiple seam bolting-grouting process
CN104895583A (en) * 2015-04-28 2015-09-09 河南理工大学 Tunnel surrounding rock control technology combining pressure relief and slip-casting reinforcement
CN105626095A (en) * 2015-12-29 2016-06-01 大同煤矿集团有限责任公司 Small coal pillar protection roadway surrounding rock support method under condition of coal seam group mining hard roof
CN105736022A (en) * 2016-03-10 2016-07-06 安徽理工大学 Layered supporting method based on deep rectangular coal roadway with tender composite roof
CN105781597A (en) * 2014-12-16 2016-07-20 淮南矿业(集团)有限责任公司 Method for performing anchoring and grouting reinforcement inside deep well soft rock gob-side entry retaining
CN106401645A (en) * 2016-11-03 2017-02-15 河南理工大学 Pressure-relief support coordination control method for deep high-stress tunnel based on borehole pressure relief
CN109026024A (en) * 2018-08-30 2018-12-18 河南理工大学 A kind of great horizontal stress effect back deformation control method
CN109268027A (en) * 2018-08-20 2019-01-25 河南理工大学 A kind of tunnel apex angle curved surface country rock intensive control method

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101122235B (en) * 2007-10-31 2010-05-19 中国矿业大学 Method for controlling wall rock of fully mechanized coal face goaf side coalbed laneway
CN101338679B (en) * 2008-06-26 2011-01-12 王光平 Deep well great section loose wall rock laneway support method
CN101806223B (en) * 2009-02-17 2013-04-03 中国神华能源股份有限公司 Method for reinforcing return channel
CN102425428A (en) * 2011-09-12 2012-04-25 山东科技大学 Method for controlling extreme broken roof in roadway head
CN102678142A (en) * 2011-12-28 2012-09-19 张千管 Multi-directional inclined combination type anchoring system for horizontal lamellar surrounding rock of tunnel and mounting method thereof
CN102678142B (en) * 2011-12-28 2014-11-19 张千管 Multi-directional inclined combination type anchoring system for horizontal lamellar surrounding rock of tunnel and mounting method thereof
CN102661144A (en) * 2012-04-28 2012-09-12 山东科技大学 Method for determining anchoring depth of anchor cable along deep lane wall of empty crossheading entity coal side
CN102661144B (en) * 2012-04-28 2014-12-10 山东科技大学 Method for determining anchoring depth of anchor cable along deep lane wall of empty crossheading entity coal side
CN102787856A (en) * 2012-08-13 2012-11-21 内蒙古鲁新能源开发有限责任公司 Permanent supporting method of weak cementation soft rock roadway
CN103216244A (en) * 2013-03-19 2013-07-24 中国矿业大学 Roadway soft and weak top plate anchoring beam-arch combined structure support system and support method
CN103277124B (en) * 2013-06-06 2015-03-25 武汉科技大学 Anchor-rod-combined supporting method for high-sulfur crush rock mine
CN103277124A (en) * 2013-06-06 2013-09-04 武汉科技大学 Anchor-rod-combined supporting method for high-sulfur crush rock mine
CN103628894A (en) * 2013-10-24 2014-03-12 重庆大学 Water-rich fault fracture zone collapsed roadway repairing method based on angle-variable umbrella-shaped advancing grouting
CN103670470A (en) * 2013-12-31 2014-03-26 大同煤矿集团有限责任公司 Full coal roadway safe and speedy drivage supporting method
CN103899329A (en) * 2014-03-24 2014-07-02 中国矿业大学 Large-deformation broken surrounding rock roadway management method
CN103899329B (en) * 2014-03-24 2016-03-30 中国矿业大学 A kind of administering method of large deformation breaking surrounding rock tunnel
CN104500091A (en) * 2014-12-07 2015-04-08 金川集团股份有限公司 Method for mine underground deep engineering support
CN105781597A (en) * 2014-12-16 2016-07-20 淮南矿业(集团)有限责任公司 Method for performing anchoring and grouting reinforcement inside deep well soft rock gob-side entry retaining
CN104695991A (en) * 2015-03-20 2015-06-10 北京昊华能源股份有限公司 Coal mine multiple seam bolting-grouting process
CN104895583A (en) * 2015-04-28 2015-09-09 河南理工大学 Tunnel surrounding rock control technology combining pressure relief and slip-casting reinforcement
CN105626095A (en) * 2015-12-29 2016-06-01 大同煤矿集团有限责任公司 Small coal pillar protection roadway surrounding rock support method under condition of coal seam group mining hard roof
CN105736022A (en) * 2016-03-10 2016-07-06 安徽理工大学 Layered supporting method based on deep rectangular coal roadway with tender composite roof
CN106401645A (en) * 2016-11-03 2017-02-15 河南理工大学 Pressure-relief support coordination control method for deep high-stress tunnel based on borehole pressure relief
CN106401645B (en) * 2016-11-03 2018-03-13 河南理工大学 A kind of deep high stress tunnel pressure relief support control method for coordinating based on drilling release
CN109268027A (en) * 2018-08-20 2019-01-25 河南理工大学 A kind of tunnel apex angle curved surface country rock intensive control method
CN109026024A (en) * 2018-08-30 2018-12-18 河南理工大学 A kind of great horizontal stress effect back deformation control method

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