CN114233340A - Water-leaching-preventing construction method for coal mine underground roadway roof - Google Patents
Water-leaching-preventing construction method for coal mine underground roadway roof Download PDFInfo
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- CN114233340A CN114233340A CN202111523958.5A CN202111523958A CN114233340A CN 114233340 A CN114233340 A CN 114233340A CN 202111523958 A CN202111523958 A CN 202111523958A CN 114233340 A CN114233340 A CN 114233340A
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- coal mine
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- 239000003245 coal Substances 0.000 title claims abstract description 27
- 238000010276 construction Methods 0.000 title claims abstract description 20
- 239000004567 concrete Substances 0.000 claims abstract description 68
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000011248 coating agent Substances 0.000 claims abstract description 33
- 238000000576 coating method Methods 0.000 claims abstract description 33
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 20
- 238000005507 spraying Methods 0.000 claims abstract description 18
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 12
- 239000003566 sealing material Substances 0.000 claims abstract description 11
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims abstract description 7
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 7
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- 238000004078 waterproofing Methods 0.000 claims abstract description 5
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 4
- 239000003973 paint Substances 0.000 claims abstract description 3
- 239000010410 layer Substances 0.000 claims description 54
- 238000004873 anchoring Methods 0.000 claims description 15
- 238000009434 installation Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000010426 asphalt Substances 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 3
- 239000011378 shotcrete Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000002386 leaching Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
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- 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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
-
- 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
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
A construction method for preventing water spraying of a coal mine underground roadway roof comprises the following steps: paving a reinforcing mesh and a steel belt on the surface of the roadway, and installing an anchor rod and an anchor cable; constructing a drainage diversion hole at a water spraying point of a roadway roof, inserting a drainage diversion pipe with pipe orifices at two ends wrapping non-woven fabrics into the hole, and plugging a gap between the pipe diversion hole and the diversion pipe by using a hole sealing material; spraying concrete on a roadway top plate to form a first concrete layer with an arched lower surface; laying non-woven fabrics and EVA waterproof guide plates; spraying concrete again to form a second concrete layer with an arched lower surface, wherein the arched curvature of the lower surface of the second concrete layer is smaller than that of the lower surface of the first concrete layer; coating waterproof paint; and finally spraying concrete for the first time to form a third concrete layer, wherein the section shape of the third concrete layer is determined according to the section shape of the roadway. A water reducing agent, a ferric chloride waterproofing agent and a compacting agent are added into the sprayed concrete, so that the waterproof capability of the concrete is enhanced; a plurality of supporting cylinders are uniformly distributed on the surface of one side of the EVA waterproof guide plate, and drainage channels are formed in gaps among the cylinders.
Description
Technical Field
The invention belongs to the technical field of coal mine safety, and particularly relates to a water-leaching-preventing construction method for a coal mine underground roadway roof.
Background
China has abundant coal resources, but occurrence conditions are complex, most coal mining modes are underground mining, and a roadway is mainly responsible for transportation, ventilation, pedestrians and other work in coal mine production, so that the roadway is the life line of coal mine production.
Despite the constant investment of new technologies and machinery in coal mining, disasters still exist due to geological reasons. For example, when the roadway roof is sprayed with water, underground transportation, pedestrians and equipment storage can be endangered, and as time goes on, certain influence can be brought to the stability of the roadway roof structure, so that coal mine production is severely restricted. At present, a water receiving device used for coal mine roadway roof water spraying can only prevent water spraying in a small range, and the water spraying prevention effect is not ideal.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the construction method for preventing the water sprinkling of the top plate of the underground roadway of the coal mine, which greatly improves the effect of preventing the water sprinkling and effectively ensures the safe and efficient production of the coal mine compared with the traditional method for preventing the water sprinkling by adopting a water receiving device.
In order to achieve the purpose, the invention adopts the following technical scheme: a water-leaching-preventing construction method for a coal mine underground roadway roof comprises the following steps:
the method comprises the following steps: paving a reinforcing mesh and a steel belt on the surfaces of a newly dug roadway top plate and a newly dug side wall in sequence, determining a good eye position on the roadway top plate and the newly dug side wall and completing punching of an anchoring hole, respectively completing installation and pre-tightening force application of an anchor rod and an anchor rope after an anchoring agent is filled into the anchoring hole of the roadway top plate, and completing installation and pre-tightening force application of the anchor rod after the anchoring agent is filled into the anchoring hole of the roadway side wall;
step two: constructing a drainage guide hole at a water spraying point of a tunnel top plate, inserting a drainage guide pipe into the drainage guide hole, wrapping pipe orifices at two ends of the drainage guide pipe by non-woven fabrics, and injecting hole sealing materials into a gap between the drainage guide pipe and the drainage guide hole to seal the gap;
step three: spraying concrete on a roadway top plate to form a first concrete layer, wherein the lower surface of the first concrete layer is arched;
step four: sequentially laying non-woven fabrics and EVA waterproof guide plates on the first concrete layer and the roadway side wall, and forming a water permeable filter layer by the laid non-woven fabrics;
step five: concrete is sprayed on the EVA waterproof guide plate to form a second concrete layer, and the lower surface of the second concrete layer positioned at the top plate of the roadway is arched;
step six: coating waterproof paint on the second concrete layer;
step seven: and spraying concrete on the second concrete layer coated with the waterproof coating to form a third concrete layer, wherein the section shape of the third concrete layer is determined according to the section shape of the roadway.
In the second step, the hole sealing material is FKL-1 type grouting hole sealing material.
In the third step, the fifth step and the seventh step, a water reducing agent, a ferric chloride waterproofing agent and a compacting agent are added into the concrete for forming the first concrete layer, the second concrete layer and the third concrete layer, and the total adding amount of the water reducing agent, the ferric chloride waterproofing agent and the compacting agent in the concrete is not less than 2% by mass.
In the fourth step, the EVA waterproof guide plate is uniformly distributed with a plurality of supporting cylinders on the surface of one side, the supporting cylinders and the permeable filtering layer are distributed at the same side, and the gaps between the supporting cylinders form drainage channels.
In the fifth step, the arched curvature of the lower surface of the second concrete layer at the top plate of the roadway is smaller than that of the lower surface of the first concrete layer.
In the sixth step, the number of the coating layers of the waterproof coating is two, and the coating directions of the two layers of the waterproof coating are mutually vertical.
In the sixth step, the non-cured rubber asphalt waterproof coating is selected as the waterproof coating, the coating thickness of the waterproof coating is 1.5mm, and the mass of the waterproof coating coated per square meter is 1.3-1.6 kg.
The invention has the beneficial effects that:
compared with the traditional water receiving device for preventing water leaching, the coal mine underground roadway roof water leaching prevention construction method greatly improves the water leaching prevention effect and effectively ensures safe and efficient production of a coal mine.
Drawings
FIG. 1 is a construction effect diagram of the construction method for preventing water spraying of the top plate of the coal mine underground roadway;
FIG. 2 is an enlarged view of section I of FIG. 1;
FIG. 3 is an enlarged view of section II of FIG. 1;
FIG. 4 is a schematic view of an assembly structure of an EVA waterproof baffle and a water permeable filter layer;
in the figure, 1-reinforcing mesh, 2-steel belt, 3-anchor rod, 4-anchor cable, 5-drainage diversion hole, 6-drainage diversion pipe, 7-hole sealing material, 8-first concrete layer, 9-permeable filtering layer, 10-EVA waterproof diversion plate, 11-second concrete layer, 12-waterproof coating, 13-third concrete layer, 14-support cylinder, 15-drainage channel, 16-rock stratum, 17-coal body.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
A water-leaching-preventing construction method for a coal mine underground roadway roof comprises the following steps:
the method comprises the following steps: sequentially paving a reinforcing mesh 1 and a steel belt 2 on the surfaces of a newly dug roadway top plate and a newly dug side wall, determining eye positions on the roadway top plate and the newly dug side wall and completing punching of an anchoring hole, respectively completing installation of an anchor rod 3 and an anchor cable 4 after an anchoring agent is filled into the anchoring hole of the roadway top plate, completing application of pre-tightening force of the anchor rod 3 and the anchor cable 4 on the roadway top plate by using a multiplier, completing installation of the anchor rod 3 after the anchoring agent is filled into the anchoring hole of the roadway side wall, and completing application of the pre-tightening force of the anchor rod 3 on the roadway side wall by using the multiplier;
step two: constructing a drainage guide hole 5 at a water spraying point of a tunnel top plate, inserting a drainage guide pipe 6 into the drainage guide hole 5, wrapping pipe orifices at two ends of the drainage guide pipe 6 by non-woven fabrics to prevent silt from entering the drainage guide pipe 6 to block the drainage guide pipe 6, injecting hole sealing materials 7 into a gap between the drainage guide pipe 6 and the drainage guide hole 5, and blocking the gap; the hole sealing material 7 is an FKL-1 type grouting hole sealing material which belongs to a quick-setting material and has the characteristics of good density, light weight, high hole sealing speed and high compressive strength;
step three: spraying concrete on a roadway roof, wherein a water reducing agent, a ferric chloride waterproof agent and a compacting agent are added into the concrete, the mass ratio of the total addition amount of the water reducing agent, the ferric chloride waterproof agent and the compacting agent in the concrete is not less than 2%, the concrete is used for forming a first concrete layer 8, and the lower surface of the first concrete layer 8 is arched;
step four: non-woven fabrics and EVA waterproof guide plates 10 are sequentially laid on the first concrete layer 8 and the side walls of the roadway, and a water permeable filter layer 9 is formed by the laid non-woven fabrics; a plurality of supporting columns 14 are uniformly distributed on the surface of one side of the EVA waterproof guide plate 10, the supporting columns 14 and the water permeable filtering layer 9 are distributed on the same side, and a drainage channel 15 is formed in a gap between the supporting columns 14, as shown in FIG. 4;
step five: concrete is sprayed on the EVA waterproof guide plate 10 to form a second concrete layer 11, and the lower surface of the second concrete layer 11 positioned at the top plate of the roadway is arched; the lower surface of the second concrete layer 11 positioned at the top plate of the roadway has an arched curvature smaller than that of the lower surface of the first concrete layer 8;
step six: coating a waterproof coating material 12 on the second concrete layer 11; the number of the coating layers of the waterproof coating 12 is two, and the coating directions of the two layers of the waterproof coating 12 are mutually vertical; the waterproof coating 12 is a non-cured rubber asphalt waterproof coating, the coating thickness of the waterproof coating 12 is 1.5mm, and the mass of the waterproof coating 12 coated per square meter is 1.3-1.6 kg;
step seven: spraying concrete on the second concrete layer 11 coated with the waterproof coating 12 to form a third concrete layer 13, wherein the section shape of the third concrete layer 13 is determined according to the section shape of the roadway; after the construction is completed, the construction effect is shown in fig. 1-3.
When the tunnel roof adopts the anti-drenching construction method, the seepage water in the tunnel roof firstly enters the drainage guide holes 5 and then is discharged through the drainage guide pipe 6, flows into the drainage channel 15 formed by the plurality of support columns 14 through the non-woven fabric where the water permeable filter layer 9 is positioned, and finally flows to the side wall of the tunnel quickly along the arched EVA waterproof guide plate 10, so that the seepage water of the tunnel roof is prevented from accumulating at the roof, and the anti-drenching effect of the tunnel roof is ensured.
The embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications without departing from the scope of the present invention are intended to be included in the scope of the present invention.
Claims (7)
1. A water-drenching-preventing construction method for a coal mine underground roadway roof is characterized by comprising the following steps:
the method comprises the following steps: paving a reinforcing mesh and a steel belt on the surfaces of a newly dug roadway top plate and a newly dug side wall in sequence, determining a good eye position on the roadway top plate and the newly dug side wall and completing punching of an anchoring hole, respectively completing installation and pre-tightening force application of an anchor rod and an anchor rope after an anchoring agent is filled into the anchoring hole of the roadway top plate, and completing installation and pre-tightening force application of the anchor rod after the anchoring agent is filled into the anchoring hole of the roadway side wall;
step two: constructing a drainage guide hole at a water spraying point of a tunnel top plate, inserting a drainage guide pipe into the drainage guide hole, wrapping pipe orifices at two ends of the drainage guide pipe by non-woven fabrics, and injecting hole sealing materials into a gap between the drainage guide pipe and the drainage guide hole to seal the gap;
step three: spraying concrete on a roadway top plate to form a first concrete layer, wherein the lower surface of the first concrete layer is arched;
step four: sequentially laying non-woven fabrics and EVA waterproof guide plates on the first concrete layer and the roadway side wall, and forming a water permeable filter layer by the laid non-woven fabrics;
step five: concrete is sprayed on the EVA waterproof guide plate to form a second concrete layer, and the lower surface of the second concrete layer positioned at the top plate of the roadway is arched;
step six: coating waterproof paint on the second concrete layer;
step seven: and spraying concrete on the second concrete layer coated with the waterproof coating to form a third concrete layer, wherein the section shape of the third concrete layer is determined according to the section shape of the roadway.
2. The coal mine underground roadway roof water-drenching-prevention construction method according to claim 1, which is characterized in that: in the second step, the hole sealing material is FKL-1 type grouting hole sealing material.
3. The coal mine underground roadway roof water-drenching-prevention construction method according to claim 1, which is characterized in that: in the third step, the fifth step and the seventh step, a water reducing agent, a ferric chloride waterproofing agent and a compacting agent are added into the concrete for forming the first concrete layer, the second concrete layer and the third concrete layer, and the total adding amount of the water reducing agent, the ferric chloride waterproofing agent and the compacting agent in the concrete is not less than 2% by mass.
4. The coal mine underground roadway roof water-drenching-prevention construction method according to claim 1, which is characterized in that: in the fourth step, the EVA waterproof guide plate is uniformly distributed with a plurality of supporting cylinders on the surface of one side, the supporting cylinders and the permeable filtering layer are distributed at the same side, and the gaps between the supporting cylinders form drainage channels.
5. The coal mine underground roadway roof water-drenching-prevention construction method according to claim 1, which is characterized in that: in the fifth step, the arched curvature of the lower surface of the second concrete layer at the top plate of the roadway is smaller than that of the lower surface of the first concrete layer.
6. The coal mine underground roadway roof water-drenching-prevention construction method according to claim 1, which is characterized in that: in the sixth step, the number of the coating layers of the waterproof coating is two, and the coating directions of the two layers of the waterproof coating are mutually vertical.
7. The coal mine underground roadway roof water-drenching-prevention construction method according to claim 1, which is characterized in that: in the sixth step, the non-cured rubber asphalt waterproof coating is selected as the waterproof coating, the coating thickness of the waterproof coating is 1.5mm, and the mass of the waterproof coating coated per square meter is 1.3-1.6 kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111523958.5A CN114233340B (en) | 2021-12-14 | 2021-12-14 | Water spraying prevention construction method for coal mine underground roadway roof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111523958.5A CN114233340B (en) | 2021-12-14 | 2021-12-14 | Water spraying prevention construction method for coal mine underground roadway roof |
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| CN114233340A true CN114233340A (en) | 2022-03-25 |
| CN114233340B CN114233340B (en) | 2024-02-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115013051A (en) * | 2022-05-26 | 2022-09-06 | 北方矿业有限责任公司 | Roadway water spraying prevention and control method |
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| CN114233340B (en) | 2024-02-13 |
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