CN107060808A - A kind of New Coal Mine underworkings combined retaining structure and its construction method - Google Patents
A kind of New Coal Mine underworkings combined retaining structure and its construction method Download PDFInfo
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- CN107060808A CN107060808A CN201710302239.8A CN201710302239A CN107060808A CN 107060808 A CN107060808 A CN 107060808A CN 201710302239 A CN201710302239 A CN 201710302239A CN 107060808 A CN107060808 A CN 107060808A
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- 239000003245 coal Substances 0.000 title claims abstract description 24
- 238000010276 construction Methods 0.000 title claims abstract description 20
- 239000011435 rock Substances 0.000 claims abstract description 52
- 230000008093 supporting effect Effects 0.000 claims abstract description 42
- 238000005065 mining Methods 0.000 claims abstract description 23
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 20
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 20
- 241001330002 Bambuseae Species 0.000 claims abstract description 20
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 20
- 239000011425 bamboo Substances 0.000 claims abstract description 20
- 238000009941 weaving Methods 0.000 claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 230000002787 reinforcement Effects 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 6
- 238000004873 anchoring Methods 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000005728 strengthening Methods 0.000 claims description 4
- 238000007711 solidification Methods 0.000 claims 1
- 230000008023 solidification Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 206010061599 Lower limb fracture Diseases 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004540 pour-on Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a kind of New Coal Mine underworkings combined retaining structure and its construction method, it includes internal layer anchor net and anchor cable, there is one layer of outer layer anchor net outside internal layer anchor net, it is one layer of mining thin bamboo strips used for weaving seat outside outer layer anchor net, outer layer anchor net and mining thin bamboo strips used for weaving seat are supported with U-shaped canopy and use steel wire lashing, U-shaped canopy is fixed with U-shaped card, and U-shaped card is fixed on firm country rock body B with anchor cable, and concrete has been poured between internal layer anchor net and outer layer anchor net.It uses the tunnel combined retaining structure of anchor rete cord+U-shaped canopy+concrete+anchor cable, effectively the demand of roadway support can not be met with the increase of mining depth by solving the common bolt-mesh-anchor support used at present or U-shaped canopy and other steel lining structures, there is bolting with wire mesh structure blanket net, anchor pole fails, there is folding beam broken leg in U-shaped canopy supporting construction or bar of stopping breaks the problem of empty top of the empty side of appearance of dropping loses support capacity influence mine safety production, obtains good practical function.
Description
Technical field
The present invention relates to a kind of New Coal Mine underworkings combined retaining structure and its construction method, belong to underground coal mine lane
Road support technology field.
Background technology
According in the existing roadway support of current underground coal mine, wooden support structure has been eliminated, and what is now used is common
Bolt-mesh-anchor support or U-shaped canopy and other steel lining structures also can not meet tunnel branch therewith with being continuously increased for mining depth
Supporting, anchor net can not be effectively carried out in the soft-rock tunnel of the demand of shield, particularly stress concentration and the tunnel of rock crusher
Occurs anchor string bag net in the tunnel of rope supporting, anchor pole, which is broken, folding beam broken leg occurs in supporting failure, the tunnel of U-shaped canopy supporting, stop
Bar breaks the serious support issues such as the empty top of the empty side of appearance of dropping, and has badly influenced the safety in production of mine.
The content of the invention
The technical problem to be solved in the present invention is：A kind of New Coal Mine underworkings combined retaining structure and its construction are provided
Method, using the tunnel combined retaining structure of anchor rete cord+U-shaped canopy+concrete+anchor cable, effectively solves the common anchor used at present
Rete cord supporting or U-shaped canopy and other steel lining structures can not meet the demand of roadway support with the increase of mining depth, go out
Existing bolting with wire mesh structure blanket net, anchor pole failure, U-shaped canopy supporting construction appearance folding beam broken leg or bar of stopping break the empty side sky of appearance of dropping
The problem of top loses support capacity influence mine safety production.
The technical scheme is that：A kind of New Coal Mine underworkings combined retaining structure, it includes internal layer anchor net
And anchor cable, there is one layer of outer layer anchor net outside internal layer anchor net, be one layer of mining thin bamboo strips used for weaving seat outside outer layer anchor net, outer layer anchor net and mining
Thin bamboo strips used for weaving seat is supported with U-shaped canopy and uses steel wire lashing, and U-shaped canopy is fixed with U-shaped card, and U-shaped card is fixed on firm country rock body B with anchor cable
On, pour concrete between internal layer anchor net and outer layer anchor net.
Internal layer anchor net and outer layer the anchor net reticulates supporting thing using reinforcement welding, and its mesh is square, the length of side
For 80~120mm.
The anchor cable is arranged in anchor hole, and is fixed on Anchor Agent on firm country rock body B, anchor cable it is a diameter of
21.6mm, its tensile strength is not less than 1770Mpa, and the anchoring strength of Anchor Agent is more than 25Mpa.
Anchorage length of the anchor cable in firm country rock body B is not less than 2m.
The U-shaped canopy is the U-shaped canopy of arch of the basket handle arch using the processing of 29#U shaped steel, and canopy is away from for 350~450mm.
The aperture of the anchor hole is that array pitch is 700~900mm between φ 25mm, anchor hole.
The intensity of the concrete is not less than 40Mpa.
A kind of New Coal Mine underworkings combined retaining structure, its construction method and step are：
（One）First reach that the tunnel of design is broken through expanding span length and height after side caunches on soft or broken country rock body A
Face, in advance from perforate on soft or broken country rock body A, construction bores anchor hole to complete country rock body B；
（Two）Anchor Agent is encased in B sections of the complete country rock body of anchor hole bottom section by section using anchor cable, by anchor pole machine equipment by anchor
Rope, which is installed to rotation anchor cable in anchor hole and punctures Anchor Agent and stir, solidifies Anchor Agent, by the end of anchor cable and complete country rock
Body B anchor connections are together；
（Three）Hang up internal layer anchor net and fasten anchor cable and carry out the broken country rock body A of supporting；
（Four）Install U-shaped canopy in the anchor rete cord drift section inner sleeve canopy of supporting, make the U-shaped canopy external periphery outline face that installs with
At least 500mm space between the anchor rete cord tunnel contoured surface of supporting；
（Five）Lay outer layer anchor net and mining thin bamboo strips used for weaving seat on the outer peripheral contoured surface of U-shaped canopy, and with iron wire by outer layer anchor net
It is fixed on the binding of mining thin bamboo strips used for weaving seat on U-shaped canopy；
（Six）Formed between U-shaped canopy external periphery outline face and the anchor rete cord tunnel contoured surface of supporting in the space of a closing
Pour concrete；
（Seven）Apart from the respectively construction 2 of 300~500mm of roadway floor position and capplce middle on the canopy leg for the U-shaped canopy being arranged
The anchor cable of same specification, and U-shaped canopy is fixed on firm country rock body B by U-shaped card, and capplce leg strengthening supporting is formed into one kind
The integer support form of combined supporting.
The beneficial effects of the invention are as follows：Compared with prior art, the present invention uses the connection of anchor rete cord+U-shaped canopy+concrete+anchor cable
Supporting construction is closed, in the case of directly carrying out supporting to soft rock or breaking surrounding rock body by anchor rete cord, U-shaped canopy is arranged and U-shaped
Lay in the closing space formed between bar-mat reinforcement and mining thin bamboo strips used for weaving seat and bolt-mesh-anchor support contoured surface and pour on the outward flange of canopy
Concrete, while constructed respectively on the capplce leg of U-shaped canopy anchor cable and carries out secondary supporting to soft rock or breaking surrounding rock body, simultaneously
Anchor cable generates certain pretightning force to U-shaped canopy, can reduce the deflection of U-shaped canopy；This combined supporting form make use of U-shaped canopy and
Concrete support is strengthened the advantage of soft rock or breaking surrounding rock tunnel energy at initial stage effective support using bolt-mesh-anchor support and anchor cable again
The active support relation formed between supporting and complete rock stratum, the complementary passive protecting situation of U-shaped canopy and concrete support, has
There is blanket net in the anchor net supporting roadway that solves of effect, and anchor pole failure and U-shaped canopy supported laneway folding beam broken leg, bar of stopping occur and dropped
There is the problem of empty top of empty side loses support capacity influence mine safety production.Technology construction is relatively simple, and underground is easily grasped
Make, supporting effect substantially, the length of service in tunnel is extended on the basis of original roadway support, is provided for the safety in production of mine
Sound assurance, obtains good practical function.
Brief description of the drawings
A kind of structural representations of New Coal Mine underworkings combined retaining structure of Fig. 1；
A kind of New Coal Mine underworkings combined retaining structure A-A sectional views of Fig. 2；
A kind of New Coal Mine underworkings combined retaining structure B-B sectional views of Fig. 3；
It is designated in figure：1st, internal layer anchor net, 2, anchor cable, 3, Anchor Agent, 4, country rock body B, 5, anchor hole, 6, country rock body A, 7, U-shaped canopy,
8th, mining thin bamboo strips used for weaving seat, 9, concrete, 10, outer layer anchor net, 11, U-shaped card.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below with reference to this specification accompanying drawing to this hair
It is bright to be described in further detail.
Embodiment 1：A kind of New Coal Mine underworkings combined retaining structure, it includes internal layer anchor net 1 and anchor cable 2,
It is one layer of mining thin bamboo strips used for weaving seat 8 that internal layer anchor net 1 is outer, which to be also had outside one layer of outer layer anchor net 10, outer layer anchor net 10, outer layer anchor net 10 and mining
Thin bamboo strips used for weaving seat 8 is supported with U-shaped canopy 7 and uses steel wire lashing, and U-shaped canopy 7 is fixed with U-shaped card 11, and U-shaped card 11 is fixed on firmly with anchor cable 2
Country rock body B6 on, poured concrete 9 between internal layer anchor net 1 and outer layer anchor net 10.
The internal layer anchor net 1 and outer layer anchor net 10 reticulate supporting thing using reinforcement welding, and its mesh is square, side
A length of 80~120mm.In the present embodiment, internal layer anchor net 1 and outer layer anchor net 10 use φ 6.5mm reinforcement welding established practice
Lattice are length × wide=1790 × 890mm net support thing, and its mesh specification is length × wide=100 × 100mm.
The anchor cable 2 is arranged in anchor hole 5, and is fixed on Anchor Agent 3 on firm country rock body B6, the diameter of anchor cable 2
For 21.6mm, its tensile strength is 1900Mpa, and the anchoring strength of Anchor Agent 3 is 30Mpa.
Anchorage length of the anchor cable 2 in firm country rock body B6 is 2.2m.
The U-shaped canopy 7 is the U-shaped canopy of arch of the basket handle arch using the processing of 29#U shaped steel, and canopy is away from for 350mm.
The aperture of the anchor hole 5 is that array pitch is 700mm between φ 25mm, anchor hole 5.
The intensity of the concrete 9 is 45Mpa.
A kind of New Coal Mine underworkings combined retaining structure, its construction method and step are：
（One）First reach that the tunnel of design is broken through expanding span length and height after side caunches on soft or broken country rock body A4
Face, in advance from perforate on soft or broken country rock body A4, construction bores anchor hole 5 to complete country rock body B6；
（Two）Anchor Agent 3 is encased in B6 sections of the complete country rock body of the bottom of anchor hole 5 section by section using anchor cable 2, passes through anchor pole machine equipment
Being installed to rotation anchor cable 2 in anchor hole 5 and puncture Anchor Agent 3 and stir anchor cable 2 solidifies Anchor Agent 3, by the end of anchor cable 2
Together with complete country rock body B6 anchor connections；
（Three）Hang up internal layer anchor net 1 and fasten anchor cable 2 and carry out the broken country rock body A4 of supporting；
（Four）Install U-shaped canopy 7 in the anchor rete cord drift section inner sleeve canopy of supporting, make the external periphery outline face of U-shaped canopy 7 that installs with
At least 500mm space between the anchor rete cord tunnel contoured surface of supporting；
（Five）Lay outer layer anchor net 10 and mining thin bamboo strips used for weaving seat 8 on the outer peripheral contoured surface of U-shaped canopy 7, and with iron wire by outer layer
Anchor net 10 and the binding of mining thin bamboo strips used for weaving seat 8 are fixed on U-shaped canopy 7；
（Six）The space of a closing is formed between the U-shaped external periphery outline face of canopy 7 and the anchor rete cord tunnel contoured surface of supporting
Interior pouring concrete 9；
（Seven）Apart from roadway floor 300mm position and capplce middle, respectively construction 2 is same on the canopy leg for the U-shaped canopy 7 being arranged
The anchor cable 2 of control gauge lattice, and U-shaped canopy 7 is fixed on firm country rock body B6 by U-shaped card 11, by capplce leg strengthening supporting formation one
Plant the integer support form of combined supporting.
Embodiment 2：A kind of New Coal Mine underworkings combined retaining structure, it includes internal layer anchor net 1 and anchor cable 2,
It is one layer of mining thin bamboo strips used for weaving seat 8 that internal layer anchor net 1 is outer, which to be also had outside one layer of outer layer anchor net 10, outer layer anchor net 10, outer layer anchor net 10 and mining
Thin bamboo strips used for weaving seat 8 is supported with U-shaped canopy 7 and uses steel wire lashing, and U-shaped canopy 7 is fixed with U-shaped card 11, and U-shaped card 11 is fixed on firmly with anchor cable 2
Country rock body B6 on, poured concrete 9 between internal layer anchor net 1 and outer layer anchor net 10.
The internal layer anchor net 1 and outer layer anchor net 10 reticulate supporting thing using reinforcement welding, and its mesh is square, side
A length of 80~120mm.In the present embodiment, internal layer anchor net 1 and outer layer anchor net 10 use φ 6.5mm reinforcement welding established practice
Lattice are length × wide=1790 × 890mm net support thing, and its mesh specification is length × wide=120 × 120mm.
The anchor cable 2 is arranged in anchor hole 5, and is fixed on Anchor Agent 3 on firm country rock body B6, the diameter of anchor cable 2
For 21.6mm, its tensile strength is 1800Mpa, and the anchoring strength of Anchor Agent 3 is 30Mpa.
Anchorage length of the anchor cable 2 in firm country rock body B6 is 3m.
The U-shaped canopy 7 is the U-shaped canopy of arch of the basket handle arch using the processing of 29#U shaped steel, and canopy is away from for 450mm.
The aperture of the anchor hole 5 is that array pitch is 900mm between φ 25mm, anchor hole 5.
The intensity of the concrete 9 is 50Mpa.
A kind of New Coal Mine underworkings combined retaining structure, its construction method and step are：
（One）First reach that the tunnel of design is broken through expanding span length and height after side caunches on soft or broken country rock body A4
Face, in advance from perforate on soft or broken country rock body A4, construction bores anchor hole 5 to complete country rock body B6；
（Two）Anchor Agent 3 is encased in B6 sections of the complete country rock body of the bottom of anchor hole 5 section by section using anchor cable 2, passes through anchor pole machine equipment
Being installed to rotation anchor cable 2 in anchor hole 5 and puncture Anchor Agent 3 and stir anchor cable 2 solidifies Anchor Agent 3, by the end of anchor cable 2
Together with complete country rock body B6 anchor connections；
（Three）Hang up internal layer anchor net 1 and fasten anchor cable 2 and carry out the broken country rock body A4 of supporting；
（Four）Install U-shaped canopy 7 in the anchor rete cord drift section inner sleeve canopy of supporting, make the external periphery outline face of U-shaped canopy 7 that installs with
At least 500mm space between the anchor rete cord tunnel contoured surface of supporting；
（Five）Lay outer layer anchor net 10 and mining thin bamboo strips used for weaving seat 8 on the outer peripheral contoured surface of U-shaped canopy 7, and with iron wire by outer layer
Anchor net 10 and the binding of mining thin bamboo strips used for weaving seat 8 are fixed on U-shaped canopy 7；
（Six）The space of a closing is formed between the U-shaped external periphery outline face of canopy 7 and the anchor rete cord tunnel contoured surface of supporting
Interior pouring concrete 9；
（Seven）Apart from roadway floor 500mm position and capplce middle, respectively construction 2 is same on the canopy leg for the U-shaped canopy 7 being arranged
The anchor cable 2 of control gauge lattice, and U-shaped canopy 7 is fixed on firm country rock body B6 by U-shaped card 11, by capplce leg strengthening supporting formation one
Plant the integer support form of combined supporting.
Claims (8)
1. a kind of New Coal Mine underworkings combined retaining structure, it includes internal layer anchor net（1）And anchor cable（2）, its feature exists
In：In internal layer anchor net（1）There is one layer of outer layer anchor net outside（10）, outer layer anchor net（10）It is one layer of mining thin bamboo strips used for weaving seat outside（8）, outer layer
Anchor net（10）With mining thin bamboo strips used for weaving seat（8）Use U-shaped canopy（7）Support and use steel wire lashing, U-shaped canopy（7）Use U-shaped card（11）It is fixed, it is U-shaped
Card（11）Use anchor cable（2）It is fixed on firm country rock body B（6）On, in internal layer anchor net（1）With outer layer anchor net（10）Between poured concrete
（9）.
2. a kind of New Coal Mine underworkings combined retaining structure according to claim 1, it is characterised in that：The internal layer
Anchor net（1）With outer layer anchor net（10）Supporting thing being reticulated using reinforcement welding, its mesh is square, the length of side is 80~
120mm。
3. a kind of New Coal Mine underworkings combined retaining structure according to claim 1, it is characterised in that：The anchor cable
（2）Installed in anchor hole（5）It is interior, and use Anchor Agent（3）It is fixed on country rock body（6）On, anchor cable（2）A diameter of 21.6mm, its resist
Tensile strength is not less than 1770Mpa, Anchor Agent（3）Anchoring strength be more than 25Mpa.
4. a kind of New Coal Mine underworkings combined retaining structure according to claim 1 or 3, it is characterised in that：It is described
Anchor cable（2）In country rock body（6）In anchorage length be not less than 2m.
5. a kind of New Coal Mine underworkings combined retaining structure according to claim 1, it is characterised in that：It is described U-shaped
Canopy（7）For the U-shaped canopy of arch for the basket handle arch processed using 29#U shaped steel, canopy is away from for 350~450mm.
6. a kind of New Coal Mine underworkings combined retaining structure according to claim 3, it is characterised in that：The anchor hole
（5）Aperture be φ 25mm, anchor hole（5）Between array pitch be 700~900mm.
7. a kind of New Coal Mine underworkings combined retaining structure according to claim 1, it is characterised in that：The concrete
（9）Intensity be not less than 40Mpa.
8. any one New Coal Mine underworkings combined retaining structure, its feature according to claims 1 to 3,5~7
It is：Its construction method and step are：
（One）First in soft or broken country rock body A（4）On reach the tunnel of design through expanding span length and height after side caunches
Section, in advance from soft or broken country rock body A（4）Anchor hole is bored in upper perforate, construction（5）To complete country rock body B（6）On；
（Two）Utilize anchor cable（2）By Anchor Agent（3）Anchor hole is encased in section by section（5）The complete country rock body B of bottom（6）Section, passes through anchor
Bar machine equipment is by anchor cable（2）It is installed to anchor hole（5）Interior rotation anchor cable（2）Puncture Anchor Agent（3）And stir and make Anchor Agent（3）
Solidification, by anchor cable（2）End and complete country rock body（6）Anchor connection is together；
（Three）Hang up internal layer anchor net（1）And fasten anchor cable（2）Carry out the broken country rock body A of supporting（4）；
（Four）U-shaped canopy is installed in the anchor rete cord drift section inner sleeve canopy of supporting（7）, make the U-shaped canopy installed（7）External periphery outline
At least 500mm space between the anchor rete cord tunnel contoured surface of face and supporting；
（Five）In U-shaped canopy（7）Outer peripheral contoured surface on lay outer layer anchor net（10）With mining thin bamboo strips used for weaving seat（8）, and use iron wire
By outer layer anchor net（10）With mining thin bamboo strips used for weaving seat（8）Binding is fixed on U-shaped canopy（7）On；
（Six）In U-shaped canopy（7）The sky of a closing is formed between the anchor rete cord tunnel contoured surface of external periphery outline face and supporting
It is interior to pour concrete（9）；
（Seven）In the U-shaped canopy being arranged（7）Canopy leg on respectively applied apart from 300~500mm of roadway floor position and capplce middle
The anchor cable of the same specification of work 2（2）, and U-shaped card（11）By U-shaped canopy（7）It is fixed on firm country rock body B（6）On, by capplce leg
Strengthening supporting forms a kind of integer support form of combined supporting.
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| CN201710302239.8A CN107060808A (en) | 2017-05-02 | 2017-05-02 | A kind of New Coal Mine underworkings combined retaining structure and its construction method |
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| CN201710302239.8A CN107060808A (en) | 2017-05-02 | 2017-05-02 | A kind of New Coal Mine underworkings combined retaining structure and its construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111472807A (en) * | 2020-04-08 | 2020-07-31 | 北京科技大学 | Tunnel or tunnel surrounding rock shielding and protecting structure and method |
| CN113494305A (en) * | 2020-04-06 | 2021-10-12 | 永城煤电控股集团有限公司 | Construction method of shotcrete anchor net for roadway surrounding rock support |
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