CN203374284U - Soft rock roadway totally-closed fracture surface arching support - Google Patents
Soft rock roadway totally-closed fracture surface arching support Download PDFInfo
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- CN203374284U CN203374284U CN201320399168.5U CN201320399168U CN203374284U CN 203374284 U CN203374284 U CN 203374284U CN 201320399168 U CN201320399168 U CN 201320399168U CN 203374284 U CN203374284 U CN 203374284U
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Abstract
The utility model relates to a soft rock roadway totally-closed fracture surface arching support. According to the soft rock roadway totally-closed fracture surface arching support, a U-shaped fracture surface support and an arc-shaped inverted arch form a totally-closed space, through the outer layer of the U-shaped fracture surface support and a bolting-wire mesh-shotcreting support of a reinforcing mesh sprayed concrete layer form a primary support through an anchor rod, and the outer layer of the U-shaped fracture surface support and a built arch on the inner layer form a combined support; after the inverted arch is formed through pouring, gangue is filled back, and a gutterway is formed in one side of a roadway to form the integrated support. According to the soft rock roadway totally-closed fracture surface arching support, a totally-closed U-shaped roadway fracture surface is adopted and different from a conventional vertical wall semicircular arched fracture surface, four segments of arcs are adopted for the fracture surface to define a closed space, crustal stress of surrounding wall rock in different directions can be resisted, and deformation is reduced; the bottom of the inverted arch is in the shape of an arc, deformation of a base plate is controlled by additionally arranging the anchor rod, and the soft rock roadway totally-closed fracture surface arching support has the advantages of being fast to construct, safe, reliable, small in deformation of the roadway, capable of reducing repairing frequency of the roadway and the like.
Description
(1) technical field
The utility model relates to coal mine down-hole tunnel and chamber support system, and particularly the totally-enclosed section of soft-rock tunnel is built the arch supporting.
(2) background technology
At present, there are thousands of seats in the above production of China's scale colliery, within 2012, coal production reaches 3,700,000,000 tons, wherein there is the colliery of 10% left and right to belong to soft rock mine, the part deep-well also shows the soft rock characteristic, the integrity of underworkings supporting directly affects Safety of Coal Mine Production, is related to underground work personnel's life security, and therefore, the support pattern of seeking a kind of applicable soft-rock tunnel and crossover point just becomes the most important thing.
In the technology of colliery, uniaxial compressive strength is less than the rock of 30MPa, is referred to as soft rock.The conventional support pattern of soft-rock tunnel and crossover point has the spray+U-shaped steel supporting of stalk Semicircular arched section anchor net, but usually owing to can not effectively controlling geostatic stress, or cause top, tunnel side to be out of shape, or it is serious to cause below, tunnel stress to highlight pucking, cause mine to stop production and jeopardize staff's safety, the tunnel repair also expends very large manpower and materials, and supporting effect is very undesirable.
In the coal mine roadway system, the intersection in tunnel and tunnel is crossover point, due to tunnel span herein greatly, highly high, geostatic stress stack, so supporting difficulty the most.The totally-enclosed section of soft-rock tunnel is built the still seldom application of colliery at home of arch supporting crossover point, the utility model is from aspect comprehensive considerations such as form of fracture, support pattern, supporting parameter, stress distribution, equipment operations, effectively control surrouding rock deformation, can realize expecting purpose.
(3) summary of the invention
The utility model, in order to make up the deficiencies in the prior art, provides a kind of soft-rock tunnel u-shaped cross-section quick, safe and reliable, that roadway deformation is little, repair in the minimizing tunnel of constructing to build the arch supporting.
The utility model is achieved by the following technical solution:
The totally-enclosed section of a kind of soft-rock tunnel is built the arch supporting, it is characterized in that: the arch of the anti-end by u-shaped cross-section supporting and arc forms totally-enclosed space, it is initial support that the skin of described u-shaped cross-section supporting utilizes the anchor net spray supporting of anchor pole and Spraying of reinforcement mat with concrete layer, and the block arch of itself and internal layer forms composite support; Arch is built rear backfill spoil at the anti-end, and the tunnel avris is arranged ditch, forms complete supporting.
It is initial support that the skin of arch of the described anti-end utilizes the anchor net spray supporting of anchor pole and Spraying of reinforcement mat with concrete layer, and internal layer is concrete lift.
Described u-shaped cross-section supporting consists of circular arc supporting and the dome-shaped supporting on it of both sides, itself and arch of the anti-end enclose an enclosure space, the center of circle of both sides circular arc supporting is positioned at the center, both sides of intermediate base rectangle, and the pitch of arch of the anti-end is got 1/3～1/5 of basic rectangle span width.
The totally-enclosed section of soft-rock tunnel of the present utility model is built the arch supporting compared with prior art, beneficial effect is: the utility model supporting adopts totally-enclosed shape of a hoof drift section, be different from conventional stalk Semicircular arched section, this section adopts four arcs to enclose an enclosure space, can resist the geostatic stress of surrounding country rock different directions, reduce distortion; It is curved that its bottom is encircleed at the anti-end, increases anchor pole and control bottom deformation.There is the advantages such as construction is quick, safe and reliable, roadway deformation is little, minimizing tunnel reparation, specific as follows:
1) form of general design is stalk Semicircular arched section anchor net spray supporting, stalk Semicircular arched section anchor net spray supporting+U-shaped steel canopy supporting, the support form of this design is totally-enclosed u-shaped cross-section form, both solve stalk Semicircular arched section and born the problem that the side pressure ability is little, utilizing again end arch fully to solve the problem of Floor Heave in Roadway, is a kind of novel Soft Rock Roadway Intersection supporting of more practical, better effects if.
The advantages such as 2) this totally-enclosed bore crossing initial support adopts anchor net spray supporting, and secondary supporting adopts concrete to build arch, with traditional bore crossing, adopts anchor net spray+U-shaped steel to compare to have overall performance more excellent, and initially supporting intensity is high, roadway forming is good.
3) mainly to destroy reason be that tunnel below geostatic stress manifests and causes pucking to traditional form of fracture crossover point, thereby cause the roadway's sides distortion, and then cause that whole tunnel destroys, therefore at first the utility model sets about from controlling the pucking aspect, excavates arch of the anti-end in the tunnelling work progress, and increases the ground bolt support, between array pitch 700mm, then the thick concreting of end arch employing 350mm, strengthen whole non-deformability, thereby reach the purpose of controlling pucking.
4) after taking the spray of totally-enclosed section, anchor net to build arch composite support mode, that crossover point has been realized is safe and reliable, roadway deformation is little, reduce the purpose that repair in tunnel.
5) after arch of the anti-end is built, adopt digging gangue to spread to terrace, can realize the spoil comprehensive utilization, not only economy but also environmental protection.
(4) accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further described.
Accompanying drawing 1 is layout schematic diagram of the present utility model;
The A-A sectional schematic diagram that accompanying drawing 2 is accompanying drawing 1;
The B-B sectional schematic diagram that accompanying drawing 3 is accompanying drawing 1;
The C-C sectional schematic diagram that accompanying drawing 4 is accompanying drawing 1.
In figure, 1 crossover point, 2 u-shaped cross-section supportings, 3 anchor poles, 4 Spraying of reinforcement mat with concrete layers, 5 spoils, 6 arches of the anti-end, 7 ditches, 8 build arch, 9 basic rectangles, 10 tracks, 11 rail level horizons, 12 concrete lifts, 21 circular arc supportings, 22 dome-shaped supportings.
(5) specific embodiment
Accompanying drawing is a kind of specific embodiment of the present utility model.The totally-enclosed section of soft-rock tunnel of the present utility model is built the arch supporting, its layout form is shown in Fig. 1, specifically by Tu2Yu tunnel, tunnel Fig. 3, cross and form, maximum span place section is shown in Fig. 4, this crossover point forms totally-enclosed space by u-shaped cross-section supporting 2 and arch of the anti-end 6, utilizing outer anchor pole 3 and the anchor net spray supporting of Spraying of reinforcement mat with concrete layer 4 is initial support, and itself and block arch 8 form composite supports, form stronger supporting intensity.Arch of the anti-end 6 is built rear backfill spoil 5, and the tunnel avris is arranged ditch 7, forms complete supporting.It is initial support that the skin of arch of the described anti-end 6 utilizes anchor pole 3 and the anchor net spray supporting of Spraying of reinforcement mat with concrete layer 4, and internal layer is concrete lift 12.
Described u-shaped cross-section supporting 2 consists of circular arc supporting 21 and the dome-shaped supporting 22 on it of both sides, itself and arch of the anti-end 6 enclose an enclosure space, the center of circle of both sides circular arc supporting 21 is positioned at the center, both sides of intermediate base rectangle 9, and arch of the anti-end 6 is highly got 1/3～1/5 of basic rectangle 9 span widths.
The totally-enclosed section of soft-rock tunnel of the present utility model is built the arch supporting, adopts the supporting of anchor net spray+steel concrete block arch, and take 4.8m and 3.6m roadway crossing point is example, 4.8 the rice drift section adopts anchor net spray 100mm, concrete is built arch 450mm, end pitch of arch 960mm, thickness 350mm; 3.6 the rice drift section adopts anchor net spray 100mm, concrete is built arch 350mm, end pitch of arch 720mm, thickness 350mm; Maximum span section 8250mm, adopt anchor net spray 100mm, and concrete is built arch 450mm, end pitch of arch 1650mm, thickness 350mm; Anchor pole adopts ￠ 20, length 2400mm, an array pitch 700mm.
The totally-enclosed section of soft-rock tunnel of the present utility model is built the arch supporting compared with prior art, beneficial effect is: the utility model supporting adopts totally-enclosed shape of a hoof drift section, be different from conventional stalk Semicircular arched section, this section adopts four arcs to enclose an enclosure space, can resist the geostatic stress of surrounding country rock different directions, reduce distortion; It is curved that its bottom is encircleed at the anti-end, increases anchor pole and control bottom deformation; There is the advantages such as construction is quick, safe and reliable, roadway deformation is little, minimizing tunnel reparation.
Claims (3)
1. the totally-enclosed section of soft-rock tunnel is built the arch supporting, it is characterized in that: the anti-end arch (6) by u-shaped cross-section supporting (2) and arc forms totally-enclosed space, it is initial support that the skin of described u-shaped cross-section supporting (2) utilizes the anchor net spray supporting of anchor pole (3) and Spraying of reinforcement mat with concrete layer (4), and the block arch (8) of itself and internal layer forms composite support; Anti-end arch (6) is built rear backfill spoil (5), and the tunnel avris is arranged ditch (7), forms complete supporting.
2. the totally-enclosed section of soft-rock tunnel according to claim 1 is built the arch supporting, it is characterized in that: it is initial support that the skin of described anti-end arch (6) utilizes anchor pole (3) and the anchor net spray supporting of Spraying of reinforcement mat with concrete layer (4), and internal layer is concrete lift (12).
3. the totally-enclosed section of soft-rock tunnel according to claim 1 and 2 is built the arch supporting, it is characterized in that: described u-shaped cross-section supporting (2) consists of the circular arc supporting (21) of both sides and the dome-shaped supporting (22) on it, itself and arch of the anti-end (6) enclose an enclosure space, the center of circle of both sides circular arc supportings (21) is positioned at the center, both sides of intermediate base rectangle (9), and anti-end arch (6) is highly got 1/3～1/5 of basic rectangle (9) span width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320399168.5U CN203374284U (en) | 2013-07-05 | 2013-07-05 | Soft rock roadway totally-closed fracture surface arching support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320399168.5U CN203374284U (en) | 2013-07-05 | 2013-07-05 | Soft rock roadway totally-closed fracture surface arching support |
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| CN203374284U true CN203374284U (en) | 2014-01-01 |
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| CN201320399168.5U Expired - Lifetime CN203374284U (en) | 2013-07-05 | 2013-07-05 | Soft rock roadway totally-closed fracture surface arching support |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104165060A (en) * | 2014-07-03 | 2014-11-26 | 中国矿业大学(北京) | Four-control support technology for soft rock roadway floor heave |
| CN106437754A (en) * | 2016-06-27 | 2017-02-22 | 中铁第四勘察设计院集团有限公司 | Segmental lining ring and anchor cable combined structure and construction method thereof |
| CN108643938A (en) * | 2018-05-23 | 2018-10-12 | 淮矿西部煤矿投资管理有限公司 | Coal mine deep well tunnel smooth surface concrete spraying support structure and its construction method |
| CN109578011A (en) * | 2018-11-24 | 2019-04-05 | 温州市久丰建设有限公司 | Supporting construction and its construction method in a kind of municipal tunnel |
| CN112112667A (en) * | 2020-09-14 | 2020-12-22 | 赵华山 | Method for treating soft rock baseplate foundation of large-section chamber |
-
2013
- 2013-07-05 CN CN201320399168.5U patent/CN203374284U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104165060A (en) * | 2014-07-03 | 2014-11-26 | 中国矿业大学(北京) | Four-control support technology for soft rock roadway floor heave |
| CN106437754A (en) * | 2016-06-27 | 2017-02-22 | 中铁第四勘察设计院集团有限公司 | Segmental lining ring and anchor cable combined structure and construction method thereof |
| CN108643938A (en) * | 2018-05-23 | 2018-10-12 | 淮矿西部煤矿投资管理有限公司 | Coal mine deep well tunnel smooth surface concrete spraying support structure and its construction method |
| CN108643938B (en) * | 2018-05-23 | 2024-04-05 | 淮矿西部煤矿投资管理有限公司 | Smooth surface shotcrete supporting structure of deep coal mine tunnel and construction method thereof |
| CN109578011A (en) * | 2018-11-24 | 2019-04-05 | 温州市久丰建设有限公司 | Supporting construction and its construction method in a kind of municipal tunnel |
| CN112112667A (en) * | 2020-09-14 | 2020-12-22 | 赵华山 | Method for treating soft rock baseplate foundation of large-section chamber |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 250000 No. 141 Dikou Road, Tianqiao District, Jinan City, Shandong Province Patentee after: GENERAL TECHNOLOGY GROPU ENGINEERING DESIGN Co.,Ltd. Address before: 250031 No. 141 Dikou Road, Tianqiao District, Jinan City, Shandong Province Patentee before: COAL INDUSTRY JINAN DESIGN & RESEARCH Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140101 |
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| CX01 | Expiry of patent term |