CN102635377A - Tensile reinforcement concrete spray body supporting method for deep soft roadway - Google Patents

Tensile reinforcement concrete spray body supporting method for deep soft roadway Download PDF

Info

Publication number
CN102635377A
CN102635377A CN2012100727002A CN201210072700A CN102635377A CN 102635377 A CN102635377 A CN 102635377A CN 2012100727002 A CN2012100727002 A CN 2012100727002A CN 201210072700 A CN201210072700 A CN 201210072700A CN 102635377 A CN102635377 A CN 102635377A
Authority
CN
China
Prior art keywords
supporting
concrete
roadway
steel mesh
anchor pole
Prior art date
Application number
CN2012100727002A
Other languages
Chinese (zh)
Inventor
张京泉
Original Assignee
新汶矿业集团有限责任公司协庄煤矿
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 新汶矿业集团有限责任公司协庄煤矿 filed Critical 新汶矿业集团有限责任公司协庄煤矿
Priority to CN2012100727002A priority Critical patent/CN102635377A/en
Publication of CN102635377A publication Critical patent/CN102635377A/en

Links

Abstract

The invention discloses a tensile reinforcement concrete spray body supporting method for a deep soft roadway. The method includes preliminarily spraying a first layer of concrete on a surrounding rock of the roadway after blasting and punching a hole to mount a primary supporting anchor rod; hanging two layers of reinforcement screens on a head of the reserved primary supporting anchor rod; secondarily spraying concrete on the roadway after the screens are hung on the roadway, punching a hole to mount a secondary supporting anchor rod after secondary concrete spraying, and leading the secondary supporting anchor rod and the primary supporting anchor rod to be in quincunx staggered arrangement; and finally spraying concrete for the third time to cover an exposed portion of the secondary supporting anchor rod. On the basis of sufficiently researching and analyzing breakage forms and mechanisms of the roadway with the broken surrounding rock, tensile reinforcement concrete spray body supporting technology is provided. Repeated practices in fields prove that the technology effectively increases supporting strength of the roadway, and the difficulty about supporting of the deep soft roadway is resolved.

Description

Deep Soft Rock Tunnel tensile reinforcement concrete sprinkler body supporting method
Technical field
The present invention relates to the colliery tunnel support technology, especially the support technology of deep tunnel more than 800 meters.
Background technology
Coal is as one of main energy sources; In China always in occupation of crucial position; Especially along with China's modernization construction and rapid economic development, the demand of resource also constantly increases, along with the continuous expansion of exploitation scale; The coal resources that superficial part is prone to adopt are exhausted day by day, and development is the inexorable trend of underground mine to the deep in exploitation.
Because the main body of deep mining country rock is a coal measure strata; Extensively folder is grown depositional fabric face, weak intercalated layer and argillization interlayer in coal measure strata; The deep rock mass many places are in " three height " complex environment of (the gentle high rock of heavily stressed, height holds hydraulic pressure) in addition; The part tunnel also receives strong digging disturbing influence, makes deep tunnel supporting problem complicated more.According to statistics, the pit mining degree of depth of the whole nation 60% or more reached more than 800 meters, and for example the Xie Zhuan colliery is as the old ore deposit of a century deepening-1100 meters levels extremely at present; The tunnel buried depth reaches 1150 meters; Roadway surrounding rock significantly demonstrates the high ground stress soft rock stress characteristic under the effect of deep high-ground stress, deep tunnel supporting difficulty; Destroy seriously, engendered destruction forms such as anchor pole inefficacy, sprinkler body come off, crush.
For solving the mining problem of Deep Mine; Experts and scholars have successively carried out a large amount of research and useful exploration to the deep tunnel support technology both at home and abroad; Work out multiple canopy, encrypted technology such as anchor pole, grouting and reinforcing; But at the support technology that has mostly followed the shallow workings aspect the supporting of deep tunnel, the research of bolting and shotcrete roadway support technology and the aspect researchs such as control of roadway surrounding rock stability also still are weak, much still are in space state.
Summary of the invention
For solving the problem of deep tunnel supporting difficulty more than 800 meters; The present invention is on the basis of fully researching and analysing breaking surrounding rock roadway destruction form and mechanism; Tensile reinforcement concrete sprinkler body support technology has been proposed; Through the on-the-spot proof of repeatedly practising, this technology effectively raises the supporting intensity in tunnel, has solved the supporting difficult problem of Deep Soft Rock Tunnel.
For achieving the above object, construction sequence of the present invention is:
The first step: on roadway surrounding rock, just spray the thick first floor concrete of 50mm after blowing out; According to array pitch 800 * 800mm perforating the once supporting anchor pole is installed; The long 2400mm of once supporting bolt diameter , and outside the hole, reserve the anchor pole head of hanging steel mesh reinforcement;
Second step: on the once supporting anchor pole head of reserving, hang and fasten the first floor steel mesh reinforcement; On steel mesh reinforcement according to the dowel of array pitch 400 * 400mm binding ; Hang second layer steel mesh reinforcement then, second layer steel mesh reinforcement and first floor steel mesh reinforcement are joined together with reinforcing bar hook;
The 3rd step: the secondary whitewashing is carried out in the tunnel to hanging after netting, and sprays the second layer concrete of thick 100mm, and whitewashing is served as reasons the end in proper order to the top;
The 4th step: after the secondary whitewashing, according to array pitch perforating between 800 * 800mm the secondary supporting anchor pole being installed again, staggers and is quincuncial arrangement in secondary supporting anchor pole and once supporting anchor pole position;
The 5th step: the covering, twice support anchor rod exposed parts of whitewashing for the third time, spray thick the 3rd layer concrete greater than 50mm.
Tensile reinforcement concrete sprinkler body supporting and protection structure of the present invention has been compared following major advantage with support forms such as anchor net spray secondary supporting in the past and multiple canopies:
1, supporting and protection structure of the present invention adopts the double steel bar net to cooperate the concrete support tunnel; Frictional force and bond between steel mesh reinforcement and the concrete have been increased; Tension, the shear strength of support material have been increased; Make tensile strength of reinforcement and concrete compressive strength all obtain fully playing, increased supporting intensity, avoided being out of shape accidents such as the laitance coating that causes ftractures, crushes because the tunnel later stage destroys;
2, supporting and protection structure of the present invention is pressed measures such as adopting the connection of equal strength dowel between net, concrete cover net, the Double-level Reticulated through adopting anchor pole; Whole support materials in tunnel are integrated effectively; Promoted the mechanical property of support material; Make it bear surrouding rock deformation jointly, increased the supporting intensity in tunnel;
3, supporting and protection structure of the present invention has reduced roadway deformation and reinstatement works amount than anchor net spray secondary supporting technology, has avoided because the potential safety hazard that laitance coating ftractures, comes off and cause; The canopy support process has been avoided passive protecting again, has saved support material, has accelerated speed of application, has higher popularization and application values.
Description of drawings
Fig. 1 is the sketch map of the embodiment of the invention;
Fig. 2 is an A portion enlarged drawing among Fig. 1.
Among the figure: 1-once supporting anchor pole, 2-first floor concrete, 3-first floor steel mesh reinforcement, 4-second layer steel mesh reinforcement, 5-secondary supporting anchor pole, 6-second layer concrete, 7-the 3rd layer concrete.
The specific embodiment
Further specify technical scheme of the present invention below in conjunction with specific embodiment and accompanying drawing.
-850 levels of the applicant colliery construction such as transport at deep tunnel; Because buried depth is big, country rock appears significantly softening and the reduction phenomenon, and because geological structure and degrade edge effect; The many places, tunnel disclose red beds; Cause that country rock is soft, intensity reduces, and adopts conventional anchor net spray secondary supporting technology can't satisfy the roadway support requirement, so we fell and transport the tensile reinforcement concrete sprinkler body support technology of the tunnel adoption of innovation such as having failed in-850 levels three; Effectively control the distortion of Deep Soft Rock Tunnel, guaranteed supporting effect (like Fig. 1 and Fig. 2).Concrete construction sequence is following:
The first step: on roadway surrounding rock, just spray the thick first floor concrete 2 of 50mm after blowing out; According to array pitch 800 * 800mm perforating once supporting anchor pole 1 is installed; The long 2400mm of once supporting anchor pole 1 diameter , and outside the hole, reserve the anchor pole head of hanging first floor steel mesh reinforcement 3;
Second step: on 1 of the once supporting anchor pole of reserving, hang and fasten first floor steel mesh reinforcement 3; On first floor steel mesh reinforcement 3 according to the dowel of array pitch 400 * 400mm binding ; Hang second layer steel mesh reinforcement 4 then, second layer steel mesh reinforcement 4 and first floor steel mesh reinforcement 3 usefulness reinforcing bar hook are joined together;
The 3rd step: the secondary whitewashing is carried out in the tunnel to hanging after netting, and sprays the second layer concrete 6 of thick 100mm, and whitewashing is served as reasons the end in proper order to the top;
The 4th step: after the secondary whitewashing, according to array pitch perforating between 800 * 800mm secondary supporting anchor pole 5 is installed again, and is staggered with once supporting anchor pole 1 position and to be quincuncial arrangement;
The 5th step: covering, twice support anchor rod 5 exposed parts of whitewashing for the third time, spray thick the 3rd layer concrete 7 greater than 50mm.

Claims (1)

1. Deep Soft Rock Tunnel tensile reinforcement concrete sprinkler body supporting method is characterized in that construction sequence is following:
The first step: on roadway surrounding rock, just spray the thick first floor concrete of 50mm after blowing out; According to array pitch 800 * 800mm perforating the once supporting anchor pole is installed; The long 2400mm of once supporting bolt diameter , and outside the hole, reserve the anchor pole head of hanging steel mesh reinforcement;
Second step: on the once supporting anchor pole head of reserving, hang and fasten the first floor steel mesh reinforcement; On steel mesh reinforcement according to the dowel of array pitch 400 * 400mm binding ; Hang second layer steel mesh reinforcement then, second layer steel mesh reinforcement and first floor steel mesh reinforcement are joined together with reinforcing bar hook;
The 3rd step: the secondary whitewashing is carried out in the tunnel to hanging after netting, and sprays the second layer concrete of thick 100mm, and whitewashing is served as reasons the end in proper order to the top;
The 4th step: after the secondary whitewashing, according to array pitch perforating between 800 * 800mm the secondary supporting anchor pole being installed again, staggers and is quincuncial arrangement in secondary supporting anchor pole and once supporting anchor pole position;
The 5th step: the covering, twice support anchor rod exposed parts of whitewashing for the third time, spray thick the 3rd layer concrete greater than 50mm.
CN2012100727002A 2012-03-19 2012-03-19 Tensile reinforcement concrete spray body supporting method for deep soft roadway CN102635377A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012100727002A CN102635377A (en) 2012-03-19 2012-03-19 Tensile reinforcement concrete spray body supporting method for deep soft roadway

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012100727002A CN102635377A (en) 2012-03-19 2012-03-19 Tensile reinforcement concrete spray body supporting method for deep soft roadway

Publications (1)

Publication Number Publication Date
CN102635377A true CN102635377A (en) 2012-08-15

Family

ID=46619938

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012100727002A CN102635377A (en) 2012-03-19 2012-03-19 Tensile reinforcement concrete spray body supporting method for deep soft roadway

Country Status (1)

Country Link
CN (1) CN102635377A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103061779A (en) * 2012-12-25 2013-04-24 中鼎国际工程有限责任公司 Novel mine tunnel supporting structure and construction method thereof
CN103452569A (en) * 2013-09-27 2013-12-18 南京云泰化工总厂 Large-section chamber supporting method
CN103603676A (en) * 2013-11-21 2014-02-26 长沙矿山研究院有限责任公司 Scraper roadway supporting 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
CN105041353A (en) * 2015-08-17 2015-11-11 河南理工大学 Roadway anchor net re-jetting double-folded-shed surrounding rock control technology
CN106522991A (en) * 2016-11-10 2017-03-22 河南理工大学 Roadway anchoring and shotcreting support flexible integrated concrete spraying layer and construction method thereof
CN106761790A (en) * 2017-01-12 2017-05-31 中铁隧道集团有限公司 A kind of open type TBM crosses tunneling boring carbonaceous slate driving and method for protecting support
CN109184747A (en) * 2018-10-24 2019-01-11 中南大学 A kind of method for protecting support of Deep Soft Rock Tunnel

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004150117A (en) * 2002-10-30 2004-05-27 Sumikura Kozai Kk Work execution method for anchor reinforcement for holding concrete reinforcing bar
CN101571049A (en) * 2009-04-19 2009-11-04 张京泉 Anchor net spray secondary supporting method under the condition of coal mine roadway construction
CN102140924A (en) * 2011-02-09 2011-08-03 中国矿业大学 Double-shell coupling supporting method of deep soft rock tunnel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004150117A (en) * 2002-10-30 2004-05-27 Sumikura Kozai Kk Work execution method for anchor reinforcement for holding concrete reinforcing bar
CN101571049A (en) * 2009-04-19 2009-11-04 张京泉 Anchor net spray secondary supporting method under the condition of coal mine roadway construction
CN102140924A (en) * 2011-02-09 2011-08-03 中国矿业大学 Double-shell coupling supporting method of deep soft rock tunnel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
许正东: "新兴煤矿较软围岩中大断面硐室施工技术", 《煤炭科学技术》, no. 07, 25 July 2007 (2007-07-25) *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103061779A (en) * 2012-12-25 2013-04-24 中鼎国际工程有限责任公司 Novel mine tunnel supporting structure and construction method thereof
CN103061779B (en) * 2012-12-25 2014-11-05 中鼎国际工程有限责任公司 Novel mine tunnel supporting structure and construction method thereof
CN103452569A (en) * 2013-09-27 2013-12-18 南京云泰化工总厂 Large-section chamber supporting method
CN103452569B (en) * 2013-09-27 2015-09-23 南京云泰化工总厂 A kind of large-section underground supporting method
CN103603676A (en) * 2013-11-21 2014-02-26 长沙矿山研究院有限责任公司 Scraper roadway supporting method
CN103603676B (en) * 2013-11-21 2015-12-30 长沙矿山研究院有限责任公司 A kind of scraper laneway support 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
CN105041353A (en) * 2015-08-17 2015-11-11 河南理工大学 Roadway anchor net re-jetting double-folded-shed surrounding rock control technology
CN105041353B (en) * 2015-08-17 2017-04-12 河南理工大学 Roadway anchor net re-jetting double-folded-shed surrounding rock control technology
CN106522991A (en) * 2016-11-10 2017-03-22 河南理工大学 Roadway anchoring and shotcreting support flexible integrated concrete spraying layer and construction method thereof
CN106761790A (en) * 2017-01-12 2017-05-31 中铁隧道集团有限公司 A kind of open type TBM crosses tunneling boring carbonaceous slate driving and method for protecting support
CN106761790B (en) * 2017-01-12 2019-04-26 中铁隧道局集团有限公司 A kind of open type TBM crosses tunneling boring carbonaceous slate driving and method for protecting support
CN109184747A (en) * 2018-10-24 2019-01-11 中南大学 A kind of method for protecting support of Deep Soft Rock Tunnel

Similar Documents

Publication Publication Date Title
CN106894833B (en) Gob side entry driving unbalanced support structure and construction method under the unstable overlying strata in deep
Zhang et al. Case histories of four extremely intense rockbursts in deep tunnels
Kang Support technologies for deep and complex roadways in underground coal mines: a review
CN105178981B (en) The closed depth coupling of broken soft rock roadway full-fracture-surfacanchoring-rod, which allows, presses bolt-grouting support method
Fangtian et al. Whole section anchor–grouting reinforcement technology and its application in underground roadways with loose and fractured surrounding rock
CN101967984B (en) Deep well tunnel cable anchor rigid-flexible coupling support and surrounding rock overall reinforced support method
Li Field observations of rock bolts in high stress rock masses
CN102220866B (en) Pressure relief and consolidation synergizing prevention and control method for rock burst in deep coal drift
CN102536239B (en) Long-wall working face coal pillar-free mining method
CN102226403B (en) Construction method of large-span subway station main body by using arched cover method and station main body structure
CN101852083B (en) Quick supporting method for large-deformation roadway easy to fall, break and loosen and apparatus thereof
CN104763432B (en) A kind of method that high stress tunnel country rock release controls large deformation
EP2801697A1 (en) Longwall working face, non-pillared mining method
CN103850688A (en) Method for dynamically superimposing coupling support on large-section roadway in complicated fault fracture zone
Yang et al. Failure mechanism and control technology of water-immersed roadway in high-stress and soft rock in a deep mine
CN103775084B (en) High inclination-angle, mining height workface equipment cross geological structure crushed zone construction technology
CN103643977A (en) Full-anchor partition pressure transferring grouting anchor rod and application method thereof
CN202431302U (en) Filling retaining wall device for high large-scale mining stope in roadway
CN102536282B (en) Method for preventing and controlling bottom heaving disaster of mine stoping tunnel
CN108643907B (en) Non-pillar mining method for broken direct roof caving roadway
CN103696803B (en) A kind of for mine down-hole tailing cemented filling barricade device
CN105971606B (en) A kind of thick sandstone coal wall recovery method
CN102937030B (en) Bolting-grouting integrated support method for zonal disintegration of deep roadway surrounding rock
Singh et al. Upshot of strata movement during underground mining of a thick coal seam below hilly terrain
WO2011103620A1 (en) A method of reducing subsidence or windblast impacts from longwall mining

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C12 Rejection of a patent application after its publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20120815