CN102031974B - Tubal curtain advanced support constructing method for deep mine roadway of coal mine passing through fault fracture zone - Google Patents

Tubal curtain advanced support constructing method for deep mine roadway of coal mine passing through fault fracture zone Download PDF

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Publication number
CN102031974B
CN102031974B CN 201010570707 CN201010570707A CN102031974B CN 102031974 B CN102031974 B CN 102031974B CN 201010570707 CN201010570707 CN 201010570707 CN 201010570707 A CN201010570707 A CN 201010570707A CN 102031974 B CN102031974 B CN 102031974B
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China
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pipe
steel pipe
jacking
curtain
service depot
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CN 201010570707
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Chinese (zh)
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CN102031974A (en
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刘泉声
卢海峰
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武汉大学
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Abstract

The invention discloses a tubal curtain advanced support constructing method for a deep mine roadway of a coal mine passing through a fault fracture zone. The method comprises the following steps: A, constructing an initial workshop and a receiving workshop at two ends of the fault fracture zone respectively; B, reinforcing roadways of the initial workshop and the receiving workshop by adopting a stepwise combined support scheme; C, reinforcing by adopting advanced grouting according to the lithologic fracture condition of the opening; D, jacking steel tubes to the receiving workshop through the fault fracture zone from the initial workshop sequentially according to round or elliptical fracture surfaces by utilizing a soft rock tube push bench; E, in a process of jacking the steel tube, injecting a drag-reducing and lubricating material through an annular grouting system which is preset in the tube, and injecting plain concrete in the steel tube to form a tubal curtain protector; and F, performing subsequent excavation support on the roadway in the tubal curtain body after the concrete in the tube reaches a designing age. The method is simple, safe and reliable, has remarkable effect for safe excavation on a roadway with fracture densely distributed zone which has high stress, is soft to fracture and developed in fissure water.

Description

Fault belt pipe curtain advanced supporting construction method is passed through in the coal mine deep well tunnel

Technical field

The invention belongs to deep Mine Workings of Suncun Construction Technology field, more specifically relate to a kind of coal mine deep well tunnel and pass through the pipe curtain advanced supporting construction method of fault belt, be applicable to the coal mine deep well tunnel and pass through the fault belt advance support, be particularly useful for the location roadway support of the rich water country rock of high-ground stress utmost point soft broken, realize the tunnel safety high efficient driving.

Background technology

In the deep tunnel tunneling process of colliery, often run into same location country rock and live through the repeatedly extruding of repeated tectonic movements and the situation of shear action.These location tomographies are densely distributed, and tectonic stress is high, and rock crusher is weak, and hydrophily is strong.Country rock argillization phenomenon was serious when crevice water was grown, and easily produced the expansion large deformation.Tunnelling is carried out in heavily stressed loose and soft surrounding rock Fu Shui location in this class tomography dense distribution, the huge difficult problem that normal experience collapses on a large scale and emits, pushes the large deformation unstability, is difficult to safety.Some mining area once adopted pre grouting from the surface all to be difficult to prove effective in conjunction with multiple advance support forms such as ahead work face slip casting, leading tubule canopy and U-shaped steel brackets, still occurring tunnel crown and face etc. in the tunneling process collapses on a large scale and emits, supporting and protection structure is difficult to bear country rock extruding large deformation and the situation of unstability, not only increased construction investment, also incured loss through delay production, the coal supply mine belt comes major safety problems and economic loss.Therefore, need this heavily stressed loose and soft surrounding rock of a kind of energy effective support badly, realize the safe and efficient job practices of passing through of colliery deep-seated fault zone of fracture tunnelling.

Summary of the invention

The objective of the invention is to be to provide a kind of coal mine deep well tunnel to pass through fault belt pipe curtain advanced supporting construction method, the method operation is simple, safe and reliable, obvious to the tomography dense distribution band tunnel safety tunneling effect of heavily stressed weakness smashed to pieces and crevice water growth.

In order to achieve the above object, the present invention adopts following technical measures:

Construct respectively at the fault belt two ends and to start the service depot and to accept the service depot; adopt the soft rock push-bench will be with the steel pipe of snap close successively jacking to receiving the service depot from the service depot that starts; make it at peripheral circle or the oval-shaped enclosed construction of forming of design drift section; and by the annular filling system that arranges in the steel pipe grouting and reinforcing is carried out in snap close junction and surrounding rock body; jointly form the pipe curtain body of sealing with steel pipe, then under the protection of pipe curtain body advance support measure, the tunnel is excavated and follow-up supporting.

The pipe curtain advanced supporting construction method of fault belt is passed through in a kind of coal mine deep well tunnel, the steps include:

A, construct respectively at the fault belt two ends and to start the service depot and to receive the service depot, the cross dimensions that starts the service depot and receive the service depot is expanded 800~1200mm to the periphery for the design tunnel, extends 5~8m along the tunnel axis direction;

B, to starting service depot and receive the service depot and adopt " substep combined supporting " scheme (Liu Quansheng, Gao Wei, Yuan Liang, " the colliery Deep Rock Roadway is stablized control theory and support technology and application ", Science Press, in January, 2010) reinforce, and the service depot's push-bench counter-force work plane that starts is carried out slip casting and sprayed mortar reinforcing, and fluid concrete counter-force basis;

C, adopt whitewashing or leading pre-slip casting to reinforce to the fragmented rock body of inlet and outlet cave;

D, utilize the soft rock push-bench that the steel pipe of diameter 600~1000mm is passed through the fault belt jacking to receiving the service depot successively by circle or elliptical section from the service depot that starts, inject the drag reduction lubriation material to reduce the frictional resistance of steel pipe jack-in process by the annular filling system that sets in advance in the steel pipe in the jack-in process, connect by snap close between the steel pipe;

After E, complete all steel pipe jackings of section finish, by annular filling system grouting and reinforcing is carried out in steel pipe junction and surrounding rock body thereof, slip casting is injected plain concrete after finishing in steel pipe, form pipe curtain protective;

F, after the pipe inner concrete reaches design age (approximately 20~28 days), under the protection of pipe curtain body, carry out the follow-up excavation supporting in tunnel, guarantee that the coal mine deep well tunnel safety efficiently passes through fault belt.

Annular filling system connects a plurality of annular Grouting Pipe by main Grouting Pipe in the described steel pipe, can realize multibreak simultaneously slip casting, the drag reduction lubriation material injects to reduce the frictional resistance of steel pipe jack-in process in this system in the steel pipe jack-in process, the cement grout that reinjects after jacking finishes carries out rock mass reinforcing.

Described pipe curtain adopts circular or oval-shaped cross-sectional form, can effectively solve vault in the tunnelling process and face collapse on a large scale emit, the problems such as wall caving and extruding large deformation.

Described pipe curtain body steel pipe adopts the length pipe to replace jacking, makes between the adjacent tubes joint avoid occurring unstable in pipe curtain joint not at same plane.

Advantage of the present invention and effect are mainly reflected in following several respects:

1, is applicable to the advance support in deep-seated fault zone of fracture tunnel, colliery, tomography dense distribution especially, country rock weakness smashed to pieces, and the crevice water lame advanced supporting of growing;

2, working procedure is simple, and is safe and reliable, little on the manufacturing schedule impact;

3, can efficient solution collapsing on a large scale in the phantom zone of fracture tunnelling process emit and push the problem such as large deformation unstability.

4, obvious to the tomography dense distribution band tunnel safety tunneling effect of heavily stressed weakness smashed to pieces and crevice water growth.

Description of drawings

Fig. 1 is that fault belt pipe curtain work progress schematic diagram is passed through in a kind of coal mine deep well tunnel

Fig. 2 is that Fig. 1 cooperates schematic diagram

Fig. 3 is annular slip casting system schematic in a kind of pipe

Fig. 4 is that a kind of steel pipe is connected schematic diagram

Wherein 1-service depot starts; 2-reception service depot; 3-push-bench counter-force work plane; 4-steel pipe; 5-annular filling system; 6-snap close; 7-annular Grouting Pipe; 8-main Grouting Pipe; 9-connecting ring.

The specific embodiment

Now the invention will be further described by reference to the accompanying drawings:

According to Fig. 1, Fig. 2, Fig. 3 and Fig. 4 as can be known, a kind of coal mine deep well provided by the invention tunnel is passed through fault belt pipe curtain advanced supporting construction method and is comprised start service depot 1 and reception service depot 2, the pipe curtain enclosed construction that steel pipe 4 links to each other and forms by snap close 6, in addition, also comprise in this job practices: the push-bench counter-force work plane 3 that counter-force is provided for the push-bench jack-in process, steel pipe 4 interior default annular filling systems 5, and be used for connecting axle to the connecting ring 9 of steel pipe 4.Its implementation step is:

A, construct respectively at the fault belt two ends and to start service depot 1 and to receive service depot 2, service depot 1 and reception service depot 2 cross dimensionss of starting are decided according to pipe curtain jacking steel pipe 4 sizes, be generally the design tunnel and expand to the periphery 800~1200mm, also decide on the push-bench size along tunnel axis direction development length, be generally 5~8m;

B, to starting service depot 1 and receive 2 tunnels, service depot and adopt " substep combined supporting " scheme (Liu Quansheng, Gao Wei, Yuan Liang, " the colliery Deep Rock Roadway is stablized control theory and support technology and application ", Science Press, in January, 2010) it is reinforced, and the push-bench counter-force work plane 3 of the service depot 1 that starts is carried out slip casting, then pouring into a mould thickness is the concrete counter-force basis of 300 ~ 500mm;

C, adopt pre-grouting or whitewashing that the fragmented rock body of inlet and outlet cave is reinforced according to the broken situation of hole lithology, pre-grouting adopts the Portland cement slurries, water/binder ratio 0.4~0.5, and the control initial setting time was at 30~50 minutes; The concrete that sprays strength grade C20 is adopted in whitewashing, and water/binder ratio is 0.4~0.5, and mixing ratio by weight is cement: yellow sand: melon seeds sheet=1:2:2, accelerating admixture incorporation are 3% of cement weight.

D, (present domestic pipe-jacking technology is comparative maturity to utilize the soft rock push-bench, have the manufacturer of many special production push-bench to improve push-bench according to customer demand) steel pipe 4 of diameter 600~1000mm is passed through the fault belt jacking to receiving service depot 2 successively by circle or elliptical section from the service depot 1 that starts, steel pipe 4 jackings sequentially be first jacking drift section bottom steel pipe 4 more successively up, adopt not isometric steel pipe 4 alternately jackings, single-unit jacking length is decided on the push-bench model, general control is at 5~10m, axially adopt connecting ring 9 to connect between the steel pipe, perpendicular to connecting by snap close 6 between the adjacent steel pipe 4 of tunnel axial direction, snap close 6 adopts the opening steel pipe of two 100~200mm and the steel pipe of two 50~100mm to process;

E, annular filling system 5 connects filling system in the pipe that 5~10 annular Grouting Pipe 7 form by a main Grouting Pipe 8, annular Grouting Pipe 7 adopts the steel pipe of 100~200mm to be processed into annular, and the filling adaptor of 5 the 50~100mm that on pipe, evenly distribute, can realize multibreak simultaneously slip casting in the pipe, in steel pipe 4 jack-in process, inject drag reduction lubriation material (such as bentonite slurry) to reduce the frictional resistance of steel pipe jack-in process by annular filling system default in the pipe 5, after all steel pipe 4 jackings of full section finish, carry out grouting and reinforcing by 5 pairs of steel pipe junctions of annular filling system and surrounding rock body thereof, after slip casting finishes, in steel pipe, inject the plain concrete of strength grade C20, form pipe curtain protective;

F, when pipe after inner concrete reaches design age (approximately 20~28 days), in pipe curtain body, carry out the follow-up excavation supporting in tunnel, guarantee that the coal mine deep well tunnel safety efficiently passes through fault belt.

Claims (1)

1. fault belt pipe curtain advanced supporting construction method is passed through in a coal mine deep well tunnel, the steps include:
A, construct respectively the service depot that starts (1) at the fault belt two ends and receive service depot (2), service depot (1) and reception service depot (2) cross dimensions of starting decided according to pipe curtain jacking steel pipe (a 4) size, expanding to the periphery 800~1200mm for the design tunnel, is 5~8m along tunnel axis direction development length;
B, to the service depot that starts (1) with receive tunnel, service depot (2) and adopt substep combined supporting scheme that it is reinforced, and the push-bench counter-force work plane (3) of the service depot that starts (1) carried out slip casting, then pouring into a mould thickness is the concrete counter-force basis of 300 ~ 500mm;
C, adopt pre-grouting or whitewashing that the fragmented rock body of inlet and outlet cave is reinforced according to the broken situation of hole lithology;
D, utilize the soft rock push-bench that the steel pipe (4) of diameter 600~1000mm is passed through the fault belt jacking to receiving service depot (2) from the service depot that starts (1) successively by circle or elliptical section, steel pipe (4) jacking sequentially be first jacking drift section bottom steel pipe (4) more successively up, adopt alternately jacking of not isometric steel pipe (4), single-unit jacking length is controlled at 5~10m, axially adopt connecting ring (9) to connect between the steel pipe, perpendicular to connecting by snap close (6) between the adjacent steel pipe of tunnel axial direction (4), snap close (6) adopts the steel pipe processing of opening steel pipe and the two 50~100mm of two 100~200mm;
E, annular filling system (5) connects the interior filling system of pipe that 5~10 annular Grouting Pipe (7) form by a main Grouting Pipe (8), annular Grouting Pipe (7) adopts the steel pipe of 100~200mm to be processed into annular, and the filling adaptor of 5 the 50~100mm that on pipe, evenly distribute, multibreak simultaneously slip casting in the pipe, in steel pipe (4) jack-in process, inject the drag reduction lubriation material by annular filling system (5) default in the pipe, after complete all steel pipes of section (4) jacking finishes, by annular filling system (5) grouting and reinforcing is carried out in steel pipe junction and surrounding rock body thereof, after slip casting finishes, in steel pipe, inject the plain concrete of strength grade C20, form pipe curtain protective;
After F, pipe inner concrete reach design age, in pipe curtain protective, carry out the follow-up excavation supporting in tunnel, guarantee that the coal mine deep well tunnel safety efficiently passes through fault belt.
CN 201010570707 2010-12-02 2010-12-02 Tubal curtain advanced support constructing method for deep mine roadway of coal mine passing through fault fracture zone CN102031974B (en)

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CN103256053B (en) * 2013-05-21 2015-07-22 中铁十六局集团第四工程有限公司 Excavation and construction method of underground cavity ball coronary dome
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
CN103362523B (en) * 2013-07-22 2015-04-22 重庆巨能建设(集团)有限公司 Suspended formwork lining method for cover arch outside tunnel portal with weak surrounding rocks
CN103835729B (en) * 2013-11-11 2016-06-15 北京中煤矿山工程有限公司 Deep distance roadway surrounding rock pre grouting from the surface reinforcement process
CN104265326B (en) * 2014-08-06 2016-04-27 上海隧道工程有限公司 A kind of method controlling large-scale rectangular push pipe driving soil deformation
CN104265325B (en) * 2014-08-06 2017-07-14 上海隧道工程有限公司 Reinforce the non-replacement construction method of push pipe antifriction mud
CN105486835B (en) * 2015-05-22 2017-07-14 山东科技大学 A kind of swell potential index roadway surrounding rock damage analog simulation experimental rig and test method
CN105464675B (en) * 2016-02-01 2017-09-29 北京首尔工程技术有限公司 A kind of construction method of face contacting pipe curtain structure
CN106437737B (en) * 2016-08-19 2019-12-10 煤科集团沈阳研究院有限公司 Pipe jacking type coal mine small-section roadway tunneling method
CN107152288B (en) * 2017-06-27 2018-04-27 中铁工程装备集团有限公司 Rectangular curve pipe curtain development machine
CN108442950B (en) * 2018-03-09 2020-01-07 中国矿业大学(北京) In-situ reinforcement method for U-shaped steel bracket
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