CN202360116U - U-shaped shed roadway junction support device - Google Patents

U-shaped shed roadway junction support device Download PDF

Info

Publication number
CN202360116U
CN202360116U CN2011205118355U CN201120511835U CN202360116U CN 202360116 U CN202360116 U CN 202360116U CN 2011205118355 U CN2011205118355 U CN 2011205118355U CN 201120511835 U CN201120511835 U CN 201120511835U CN 202360116 U CN202360116 U CN 202360116U
Authority
CN
China
Prior art keywords
support
canopy
roadway
construction
supporting
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.)
Expired - Fee Related
Application number
CN2011205118355U
Other languages
Chinese (zh)
Inventor
王合涛
陈广斋
周青帮
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.)
Eighth Coal Mine Of Hebi Coal & Electricity Co Ltd
Original Assignee
Eighth Coal Mine Of Hebi Coal & Electricity Co Ltd
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 Eighth Coal Mine Of Hebi Coal & Electricity Co Ltd filed Critical Eighth Coal Mine Of Hebi Coal & Electricity Co Ltd
Priority to CN2011205118355U priority Critical patent/CN202360116U/en
Application granted granted Critical
Publication of CN202360116U publication Critical patent/CN202360116U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model discloses a U-shaped shed roadway junction support device which comprises a basic U-shaped shed and a specifically-made U-shaped shed; one support leg at one side of the specifically-made U-shaped shed is bound and connected with support legs of the basic U-shaped shed; the other end of the specifically-made U-shaped shed is opened and provided with a temporarily red pine support leg; the upper end of the red pine support leg is a spherical-surface groove, the depth of which is not less than 20cm; and the lower end of the red pine support leg is provided with a hard support bottom. By adopting the U-shaped shed roadway junction support device, after carrying out reserved construction and secondary opening, the support requirements and the construction operation requirements can be fully met. According to the U-shaped shed roadway junction support device, the support strength of junctions is effectively improved, the support effect is improved, the work efficiency is improved, the construction safety of the junctions is guaranteed and the economical benefit and the social benefit are remarkable.

Description

A kind of U type canopy roadway junction suspension device
Technical field
The utility model belongs to the roadway support device.
Background technology
Roadway junction is meant one section tunnel of tunnel intersection in the mine or turnoff.Because the excavation of roadway junction; Make the stress of place, crosspoint roadway surrounding rock change two into to stress state or uniaxial stressed state by original three-dimensional stress state; And then make rock property and stressing conditions is corresponding changes, and the possibility of roadway junction generation unstable failure is increased severely.
Crosspoint place is because of receiving the influence of two or many roadway intersections, and the outstanding appearance of tunnel span and top board is amassed often very big, adds influencing each other of near two-side supporting pressure area, tunnel of overcrossing point and top board unload zone, makes the stressed complicacy of this place's country rock.Along with the increase of mining depth, various forms of crosspoints all can cause various engineering stability problems inevitably.And underworkings crosspoint form is complicated especially various, also is not quite similar with its structure such as the roadway junction mechanical characteristic.
Deep-well tunnel crosspoint stability problem has been carried out a large amount of research both at home and abroad; Some influential theory and technologies have been formed gradually; These theories have solved a large amount of surrounding rock supporting problems with technology; But because the complexity of deep mining environment, the problem of the difficult supporting of roadway junction is solved as yet at all, causes that blindness is big in practice, specific aim is poor, success rate is low, waste is serious.
Analysis through to a large amount of lists of references can be known; Although numerous experts, scholar are carrying out certain engineering practice aspect roadway junction construction and the supporting; But on theoretic knowledge and supporting method, also there are many problems, mainly show as: the difference between the uncertainty of (1) roadway surrounding rock or supporting and protection structure failure mode and multiplicity and single failure criterion.How to make tunnel structure more stable.It not only depends on supporting intensity, and also closely related with roadway engineering support form, support time, digging mode to a great extent.Moreover any Roadway damage pattern is not single; But from the tunnel or supporting and protection structure certain or several sentence one or more modes and at first destroy (break-through point is theoretical); Then destroy progressively development (on destructiveness) and gradual change (on failure mode), finally cause the tunnel to be destroyed fully.
(2) traditional theory method (such as beam theory, plate theory and masonry beam theory etc.) is because the restriction of its condition of compatibility is difficult to satisfy the requirement of engineering under deep-well, big section situation.
(3) stability in deep tunnel crosspoint receives multiple factor affecting, is mainly reflected in geometrical structure parameter, geologic(al) factor and three aspects of support pattern.According to the analysis and the research of lot of documents, comparatively ripe to the research of geometry, geologic(al) factor and form of construction work both at home and abroad, and the research of the opening aspect of support pattern, roadway junction is less relatively.
After (4) 20 sixties in century, China's coal-mine all makes significant progress in engineering theory, support technology and design theory.But owing to the each side reason, China's coal-mine roadway junction technology in theory, in the design, still have some problems on the support technology.Especially still need deepen adopting supporting and the research of secondary opening aspect that ramus profundus protects in the tunnel greatly.
In sum, prior art has its superiority but also has limitation simultaneously, has only and correctly is familiar with this fact, and to the problem that exists, explore the approach of the problem of finding the solution, and just might make support theory developed.
Stability of the roadway factor, deformation behaviour and scientific and reasonable layout support pattern are the main paties that solves roadway junction stability, and it is significant for Safety of Coal Mine Production therefore further to study the support theory that is suitable for deep tunnel crosspoint problem.
Retrieval finds to have the pertinent literature report, and outline is following: 1. anchor cable suspention U section steel beam technology/Li Baorong (ore deposit, Shanxi coking coal group company land owned by officials) // Shanxi coking coal science and technology .2004. (B08) .-33-34 is used in the supporting of digging laneway crosspoint.
[digest] introduced in digging laneway intersects supporting, through using anchor cable suspention U section steel beam technology, solved the problem that old support pattern exists, and its scope of application is inquired into.
2. application/Wang Jingyi, the Sun Liang (Huainan Mining Group Pan two collieries) // coal engineering .2010 of anchor cable secondary supporting technology in the Da Xiang crosspoint, (9) .-37-39.
[digest] proposed initiatively composite support cooperation Shotcrete Rockbolt Support Technique of the high prestressed girder anchor cable of utilization to crosspoint secondary supporting technical barrier, prevents that effectively country rock intensity from reducing, and keeps the integrality of country rock.Show through field observation; Girders anchorage cable secondary supporting system can use by multiple roadway junction under complex geological condition; Essential change takes place before the roadway support situation is compared effectively control surrouding rock deformation and destruction; Preventing roof delamination, is the compound active support mode of a kind of brand-new brute force that is fit to secondary supporting under the complex conditions such as Da Xiang crosspoint.
3. deep large section roadway crosspoint comprehensive support technology/Yang Xuesheng, Pang Jiaping (Huainan Mining Group thanks to an ore deposit) // journal .2008 of Huainan Vocationl Technical College, 8 (1) .-11-12.
[digest] efficiently solves problems such as large section roadway crosspoint, deep difficulty of construction is big, maintenance cycle is short through large section roadway crosspoint, deep being adopted comprehensive support technology such as take a step " U " type canopy, anchor pole, block arch, spray, slip casting, anchor cable.
4. door construction technology discussion/Wang Jisheng, Liu Chunyao (Huaibei Mining Group company Xu Tuan colliery) // colliery engineering .2009,28 (6) .-173-175 dial in the place, crosspoint.
The construction technology difficult problem that [digest] concentrates return air to join the lane through two sections north wing rock that the 82 times People's Bank of China in Xu Tuan colliery are gone down the hill is studied; In conjunction with on-site actual situations, the reasonable joint supporting scheme has been proposed, permanent support and reinforce support interact; Prove through field practice; This support technology can be controlled the deformation and failure of country rock at area of stress concentration effectively, has guaranteed the safe construction in tunnel and effective utilization in later stage, satisfies the safety in production requirement.
5. the anchor beam rete cord sprays application/Zheng Shihao (Anhui Huaibei Mining Group company Hai Zi colliery) // colliery engineering .2007 of supporting in the construction of big crosspoint, 26 (7) .-105-106.
The successful Application of [digest] anchor beam rete cord spray support technology in the big crosspoint construction of Hai Zi ore deposit, provides good example at the large section roadway of in weak stratum, constructing on support pattern, have certain promotion and use value.
6. application/Yang Lanpo (Funing County coal undertaking administrative office) // hydraulic coal mining and the pipeline transport .2009 of cable bolting in unstable formation roadway crossing point construction, (2) .-59-61.
[digest] proposed roadway junction and used anchor cable to strengthen support process to the actual conditions of rock stratum under the old Liujiang mine, introduced the design of cable bolting parameter, and perfect roadway crossing point support process has been obtained effect preferably in production practices.
7. (Qiwu Shengjian Coal Mine of Shandong Prov.) // Shandong coal science and technology .2004 such as hacking shed tunnel crosspoint safety type support pattern research/Huang Zhijiang, (B06) .-120.
The designed productive capacity 0.9Mt/a of [digest] Qiwu Shengjian Coal Mine of Shandong Prov., owing to receive the influence of down-hole geological conditions and production practice, work plane crossheading support pattern mainly adopts H shaped steel shack to carry out supporting, accounts for 90% of tunnel total amount.In the tunnelling process, owing to need construction safety cave and tunnel to turn round etc., produced a large amount of crosspoint constructions, brought difficulty to roadway support.According to incompletely statistics, the Seventh Five-Year Plan life has been built the colliery since going into operation, the roof accident that in tunneling process, takes place.
8. grade separation roadway junction construction technology improvements/Zhao Yuan (the Lushui River peace ring ability joint-stock company Zhang Cun colliery) in the high seam; Li Guansheng (shanxi coal electricity group company) // coal .2002,11 (6) .-21-21,48.
[digest] is difficult to the supporting problem to what arrange in the high seam along the top board digging laneway with along base plate digging laneway crosspoint; Grade separation point supporting improvement project is proposed; Effectively improved the supporting effect of grade separation point; Shorten the construction period, for the grade separation point supporting under the same terms provides satisfactory method.
9. brief talk construction/Wang Lixin (open the Lv Jia of Luan cleaned coal limited company stick together the Mining Industry Subsidiary Company) // hydraulic coal mining and the pipeline transport .2004 in tunnel, facade crosspoint, (3) .-34-35.
[digest] this paper has introduced the stick together job practices of Mining Industry Subsidiary Company digging laneway particular location of Lv Jia, has introduced the work progress in tunnel, facade crosspoint and the measure of taking in detail, and the problem to being found in the construction has proposed suggestion.
10. scissors junction point in tunnel changes exploration/Lv Huaxin (opening the Qian Jiaying of Luan group the Mining Industry Subsidiary Company) // hydraulic coal mining and the pipeline transport .2007 of platform canopy technology, (2) .-21-22.
[digest] taked through to work plane gate road opening the time to go up a hill at track (transportation) and set up large span and reinforce the practical exploration of new technologies such as platform canopy along platform canopy, the supporting width that increases crossheading opening tunnel and anchor pole (rope), the crossheading opening beaten to the problem that causes the tunnel effective width to reduce obtained solution.
11. that the selection of same coal seam gallery and crosspoint, inclined gallery constructure scheme is used is/ten thousand of heap of stone, Tan Biao, Shi Zhengjing (Guotou Xinji Energy Source Co., Ltd.) // colliery engineering .2006,25 (10) .-84-85.
In [digest] development process, the time regular meeting run into the processing of roadway intersection, handle easily normal condition lower gangway intersection; But if intersect between same direction in two tunnels; And under the less situation of the gradient, then be unusual difficulty, the general concretes that adopt build arch, watt stone arch or the supportings of large U type canopy more; But engineering quantity is big, constructional difficulties; New collection 241301 machine lanes, three ore deposits and the belt crossing engineering construction method of going up a hill is summarized, can use for reference value in the hope of providing for development work.
Result for retrieval shows, domestic have a pair report of roadway junction supporting construction technology, in digging laneway intersects supporting, uses anchor cable suspention U section steel beam technology like listed pertinent literature 1.Document 2 has proposed initiatively composite support cooperation Shotcrete Rockbolt Support Technique of the high prestressed girder anchor cable of utilization to the crosspoint secondary supporting.Document 3 adopts comprehensive support technology such as take a step " U " type canopy, anchor pole, block arch, spray, slip casting, anchor cable.Document 4 has proposed the combined supporting scheme, and permanent support and reinforce support interact, and permanent support adopts frame canopy+anchor cable net+sprayed mortar combined supporting form, and reinforce support adopts anchor cable+steel I-beam combined reinforcement to reinforce.Document 5-7 has introduced the application that anchor beam rete cord spray supporting, cable bolting, two catch pawl and concealed type are lifted the canopy support technology.Document 8 proposes grade separation point supporting improvement project, and cancellation is only encrypted canopy (hut distance) construction to the construction of building a wall of tunnel, bottom grade separation scope, helps canopy leg bottom to carry out the bottom girder based process to brattice way two simultaneously.Take the method for chain reinforcing that shed is fixed, accomplish fluently chain grillage on two at the knick point place in advance, the initial stage takes to connect the method construction of canopy leg after laying one's hand on down.Document 10 is taked to go up a hill at track (transportation) and is set up large span and reinforce technologies such as platform canopy along platform canopy, the supporting width that increases crossheading opening tunnel and anchor pole (rope).Document 11 has been introduced the selection of same coal seam gallery and crosspoint, inclined gallery constructure scheme, comprises that the crosspoint sets up trapezoidal canopy and build the method, crosspoint that watt stone walling adds strong supporting simultaneously by laying bricks or stones and adopt the method for setting up " u " type canopy.
In recent years my ore deposit about the construction technology of U type canopy supporting roadway junction always active research with apply in the middle of.But browse after the correlation technique data; Meet the higher technology of physical condition under my mine and mature and reliable and using value seldom; A lot of its mechanization degrees of operable technology are too high: like the fully-mechanized digging machine capable of using of being constructed in the crosspoint constructed simultaneously in two tunnels etc.; The conditions down-hole that this not too very meets my ore deposit is difficult to realize basically.
Deepening along with development; The use of U type canopy in support process is more and more general now; But the know-how to reserve construction at U type canopy roadway junction still belongs to blank; Face development intensification, coal resources situation in short supply day by day, national big-and-middle-sized mine all will get into the situation of deep developing and a large amount of U of use type canopy support process, and this is the inexorable trend of industry development.
, top board bad in the face of lithology under my mine is prone to broken; And along with the increase of mining depth, the influence that press in the ore deposit is also more and more serious, has caused problems such as the roadway deformation of secondary opening part is serious, the opening construction difficulty is big, U type canopy canopy leg is extruded; For walking at the industry front end; To the research and development of U type canopy support process advanced technology in the tunnelling, imperative, my ore deposit is that target is researched and developed technology in this scope in line with solving the safety in production actual needs.
At present, during the tunnelling of my ore deposit adopt the supporting of U type canopy, U type canopy is heavy more, hard transportation not only, and for set up, dismounting and recovery all increased sizable difficulty, even has certain danger, for construction brings inconvenience.If to position, crosspoint secondary opening construction, difficulty of construction is bigger again, and time-consuming, waste material.
The utility model content
The utility model problem to be solved is; Reserve construction in advance later-stage secondary aperture positions such as gallery three-dimensional or four-way crosspoint, high-order crack extraction drill site being carried out U type canopy roadway junction when the roadway opening driving, and combine crane coal eight ore deposits to propose a kind of U type canopy roadway junction suspension device.
Adopt following technical scheme in order to solve the problems of the technologies described above: a kind of U type canopy roadway junction suspension device; Comprise basic U type canopy and special U type canopy; The supporting leg binding of one side leg of described special U type canopy and basic U type canopy is connected, the other end is opening and be provided with interim Korean pine material supporting leg; Korean pine material supporting leg upper end is a spherical groove, and the degree of depth of groove is not less than 20cm, and Korean pine material supporting leg lower end is provided with the hard backing.
The diameter of described Korean pine material supporting leg is not less than 16cm.
In the slit of special U type canopy and basic U type ceiling end, be provided with timber wedge.
Adopt the utility model, after reserving construction and secondary opening, can fully satisfy supporting requirement and constructing operation requirement.Effectively raise the supporting intensity in crosspoint, improved supporting effect, improved work efficiency, guaranteed the construction safety in crosspoint, economic benefit and obvious social benefit.In secondary when construction in the crosspoint, not be used in dismounting again and set up again, and labor strength reduces, and construction sequence reduces, and difficulty of construction reduces, and reduces production costs, the engineering quantity in material consumption and minimizing tunnel.Conditions of similarity goes down into a mine and has wide application value and prospect in the mining area, Hebi.
Description of drawings
Fig. 1 is the structural representation of the utility model.
The specific embodiment
As shown in Figure 1; A kind of U type canopy roadway junction suspension device comprises basic U type canopy 1 and special U type canopy 2, and supporting leg 4 bindings of a side leg 3 of special U type canopy 2 and basic U type canopy 1 are connected, the other end is opening and be provided with interim Korean pine material supporting leg 5; The diameter of Korean pine material supporting leg is not less than 16cm; Korean pine material supporting leg 5 upper ends are spherical groove, and the degree of depth of groove is not less than 20cm, and Korean pine material supporting leg lower end is provided with hard backing 6.In the slit on special U type canopy 2 and basic U type canopy 1 top, be provided with timber wedge 7.
To cut the concrete work progress at eye place following along turning 3103 on 3103 south, crane coal eight ore deposits:
1, cuts the eye construction and want strict by the design attitude opening.
2, cut an opening construction before; The support of wearing long Liang Pengchu all must be intact, reexamines to mend to have joined net, and the tunnel in the 5m scope before and after the open centre is reinforced; The method of reinforcing: each makes a call to a wood point post apart from support 1m position, beam center under the basic canopy support beam before and after open centre in the 5m scope; The post root will be planted at hard the end, and the needling degree of depth is not less than 0.2m, and wood point post materials are Korean pine material or the hardwood that diameter is not less than 16cm.
3, in the basic canopy canopy sky at open centre 1.3m place, establish the long Liang Peng of special U type canopy by frame from south to north, canopy is apart from 0.7m.Special U type canopy is than the low 0.3m of basic canopy.
4, expand when helping to need explosion, suitably control explosive payload, every explosive payload is not more than 150g, and minimum burden is not less than 0.5m.
5, the supporting leg binding of a side leg of special U type canopy and basic U type canopy is connected, the other end is opening and be provided with interim Korean pine material supporting leg.Korean pine material supporting leg and U type canopy overlap joint part are chopped to groove, and with special U type canopy chucking, and Korean pine material supporting leg will be planted at hard the end.Every one canopy uses two irony pull bars with special U type canopy chain (the 0.5m place is helped at the center, tunnel downwards one time, openend apart from beam head 0.8m place one time).
6, the special U type of six roots of sensation frame good after, the basic canopy on special U type canopy and both sides is chain, make special U type canopy and basic canopy become integral body.
7, lift canopy (lift canopy two 2.6m girder steels of use and four 3m U shaped steel legs sets up canopy temporarily) laneway opening group interim reinforcing that have a fight apart from special U type capplce mouth 1m place; Hold four special U type canopies, the interim reinforcing lifted canopy and do not connect part with special U type canopy and will use the urgent back of the body of timber wedge firm.
8, interim reinforce lift frame good after, interim some post of special U type canopy returned, then special U type capplce end set up U type canopy to canopy as two canopies of secretly lifting, two canopy and special U type capplces secretly lifted do not connect part and will use the urgent back of the body of timber wedge firm.
9, two secretly lift frame good after, with timber that strand between special U type canopy and the basic canopy is real, basic canopy is firmly held in the palm on special U type canopy capplce, can help the useless canopy leg of basic canopy to remove opening then, will stretch out the long U type capplce in tunnel and amputate.
10, each is broken a wood and clashes post lifting capplce leg contact position earlier when cutting direction driving; Post must contact by face with lifting canopy in an opposite direction, and the post post is with planting the hard end in an opposite direction, and the needling vertical depth is not less than 0.2m; In an opposite direction post must remain intactly, after driving 5m, can remove.

Claims (3)

1. U type canopy roadway junction suspension device; Comprise basic U type canopy and special U type canopy; It is characterized in that: the supporting leg binding of a side leg of described special U type canopy and basic U type canopy is connected, the other end is opening and be provided with interim Korean pine material supporting leg; Korean pine material supporting leg upper end is a spherical groove, and the degree of depth of groove is not less than 20cm, and Korean pine material supporting leg lower end is provided with the hard backing.
2. a kind of U type canopy roadway junction suspension device according to claim 1 is characterized in that: the diameter of described Korean pine material supporting leg is not less than 16cm.
3. a kind of U type canopy roadway junction suspension device according to claim 1 is characterized in that: in the slit of special U type canopy and basic U type ceiling end, be provided with timber wedge.
CN2011205118355U 2011-12-09 2011-12-09 U-shaped shed roadway junction support device Expired - Fee Related CN202360116U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011205118355U CN202360116U (en) 2011-12-09 2011-12-09 U-shaped shed roadway junction support device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011205118355U CN202360116U (en) 2011-12-09 2011-12-09 U-shaped shed roadway junction support device

Publications (1)

Publication Number Publication Date
CN202360116U true CN202360116U (en) 2012-08-01

Family

ID=46571307

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011205118355U Expired - Fee Related CN202360116U (en) 2011-12-09 2011-12-09 U-shaped shed roadway junction support device

Country Status (1)

Country Link
CN (1) CN202360116U (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103321643A (en) * 2013-06-26 2013-09-25 攀钢集团工程技术有限公司 Excavating method for ox-nose shaped roadway
CN103670464A (en) * 2013-12-19 2014-03-26 山东华宁矿业集团有限公司 Roadway interlocking reinforced type U-shaped shed
CN104100282A (en) * 2014-06-17 2014-10-15 山西晋城无烟煤矿业集团有限责任公司 Method for driving anchor cables to maintain triangular area of roadways
CN108612533A (en) * 2018-05-04 2018-10-02 淮南矿业(集团)有限责任公司 Dial the construction method in gate segment tunnel
CN109779652A (en) * 2018-12-03 2019-05-21 李洪彪 A kind of expansion of coal-mine soft-rock tailentry is repaired and method for protecting support

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103321643A (en) * 2013-06-26 2013-09-25 攀钢集团工程技术有限公司 Excavating method for ox-nose shaped roadway
CN103321643B (en) * 2013-06-26 2015-09-30 攀钢集团工程技术有限公司 A kind of excavation method of ox muzzle shape tunnel
CN103670464A (en) * 2013-12-19 2014-03-26 山东华宁矿业集团有限公司 Roadway interlocking reinforced type U-shaped shed
CN104100282A (en) * 2014-06-17 2014-10-15 山西晋城无烟煤矿业集团有限责任公司 Method for driving anchor cables to maintain triangular area of roadways
CN108612533A (en) * 2018-05-04 2018-10-02 淮南矿业(集团)有限责任公司 Dial the construction method in gate segment tunnel
CN109779652A (en) * 2018-12-03 2019-05-21 李洪彪 A kind of expansion of coal-mine soft-rock tailentry is repaired and method for protecting support
CN109779652B (en) * 2018-12-03 2021-02-02 李洪彪 Method for expanding, repairing and supporting air return roadway of soft rock working face of coal mine

Similar Documents

Publication Publication Date Title
CN202360116U (en) U-shaped shed roadway junction support device
CN102606159B (en) Medium thick heavy-pitch crushed ore body frame type artificial top downward segmenting cemented filling method
CN102733827B (en) Tunnel arch exchanging construction method and construction structure in tunnel arch exchanging construction
CN103161480B (en) Initiatively support the method for roadside packing gob side entry retaining
CN104763434B (en) A kind of without coal column double lanes driving method
CN102071941B (en) Fully mechanized mining gob-side entry retaining-based concrete block staggered joint longitudinal stacking wall forming method
CN104653187B (en) Water-rich sand layer geology large cross-section tunnel excavation method
CN102953732A (en) Room-and-pillar major-diameter longhole inverted-step-like segmented lateral caving subsequent filling mining method
CN102226403A (en) Construction method of large-span subway station main body by using arched cover method and station main body structure
CN204729099U (en) Rock quality layer tunneling three layers of subway station canopy structure
CN106337686B (en) Three layers of subway station canopy structure of rocky stratum tunneling and construction method
CN102373930A (en) Rapid construction method of weak surrounding rock large-section multi-arc tunnel
CN105089668A (en) Longwall working face coal-pillar-free mining method
CN201991017U (en) Subway large-span station body structure based on arch cover method construction forming
CN102425155B (en) Method for reinforcing overlying shallow rockmass in mined-out area
CN104763433A (en) Underground excavation construction method of large-span subway station in flexible-top and hard-bottom stratum
CN104989425A (en) Underground excavation hole entering supporting structure and method
CN109736827B (en) Method for excavating urban subway hard rock stratum communication channel by high-pressure gas expansion fracturing
CN105370286A (en) Drift and fill type open stope subsequent backfilling mining method
CN101737068A (en) Method for substituting reconstructed gangue bearing body for roadway protection coal post
CN105386767B (en) A kind of barnyard avalanche mixed mining hangs the mining methods of side
CN106988760A (en) Facility-sliding strata tunnel portal reinforcing construction and construction method
CN208815566U (en) The transverse direction that open cut or lid dig underground main structure below existing building digs construction
CN108397196B (en) A kind of gently inclined orebody open air trestle mining methods based on lattice guest's artificial ore pillar
CN110043269A (en) A kind of excavation construction process of freeway tunnel barrel

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120801

Termination date: 20121209