CN108930543A - A kind of big cross section gob side entry driving coupling supporting structure and construction method - Google Patents
A kind of big cross section gob side entry driving coupling supporting structure and construction method Download PDFInfo
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- CN108930543A CN108930543A CN201810780623.3A CN201810780623A CN108930543A CN 108930543 A CN108930543 A CN 108930543A CN 201810780623 A CN201810780623 A CN 201810780623A CN 108930543 A CN108930543 A CN 108930543A
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- 230000008093 supporting effect Effects 0.000 title claims abstract description 47
- 238000010276 construction Methods 0.000 title claims abstract description 18
- 230000008878 coupling Effects 0.000 title claims abstract description 17
- 238000010168 coupling process Methods 0.000 title claims abstract description 17
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 84
- 239000010959 steel Substances 0.000 claims abstract description 84
- 239000003245 coal Substances 0.000 claims abstract description 65
- 239000002699 waste material Substances 0.000 claims abstract description 11
- 239000011440 grout Substances 0.000 claims abstract description 10
- 238000007569 slipcasting Methods 0.000 claims abstract description 10
- 238000005553 drilling Methods 0.000 claims description 19
- 239000002002 slurry Substances 0.000 claims description 15
- 239000011435 rock Substances 0.000 claims description 14
- 239000004568 cement Substances 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 238000003306 harvesting Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 230000005641 tunneling Effects 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 238000004873 anchoring Methods 0.000 claims 1
- 210000003205 muscle Anatomy 0.000 claims 1
- 238000000605 extraction Methods 0.000 abstract description 3
- 230000002787 reinforcement Effects 0.000 abstract description 3
- 230000006378 damage Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005065 mining Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/152—Laggings made of grids or nettings
-
- 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
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/021—Grouting with inorganic components, e.g. cement
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The present invention relates to a kind of big cross section gob side entry driving coupling supporting structures, including top plate portion, goaf side section, entity coal side part and base angle anchor tube, wherein top plate portion includes 20 × 2400mm of Ф anchor pole I, Ф 6mm steel mesh I, Ф 20mm steel bar ladder I and Ф 17.8 × 6500mm anchor cable, and goaf side section includes the anchor cable of Ф 6mm steel mesh II, 400 × 400 × 12mm steel plate pallet and upper return airway supporting；Entity coal side part includes 20 × 2400mm of Ф anchor pole II, Ф 6mm steel mesh III, Ф 20mm steel bar ladder II；Using waste and old steel pipe as base angle anchor tube, outer 45 degree of bundle carrys out floor lift control.Its construction method includes five steps such as coal column pre-pouring grout, tunnel advanced deep hole grouting, supporting construction installation positioning, the grouting of base angle anchor tube and dynamic slip casting.The present invention carries out advance reinforcement, destruction when reducing a working face extraction to coal column；Using to anchor cable is drawn, the high advantage of the tensile strength of anchor cable is played to greatest extent, reduces secondary investment.Anchor beam supporting is introduced into roadway support, has not only prevented wall caving during driving, but also strengthen the supporting to lane side.Pucking is administered using waste and old steel pipe as anchor tube, not only plays the role of preventing pucking, but also accomplished waste utilization.
Description
Technical field
The present invention relates to a kind of big cross section gob side entry driving coupling supporting structure and construction method, belongs to mining engineering technical field.
Background technique
Currently, the purpose of future small coal pillar is that tunnel is isolated with goaf when carrying out exploitation of coal resources, prevent mined out
The water and pernicious gas in area seal in tunnel, jeopardize safety in production, coal pillar width plays a decisive role to the maintenance situation in tunnel, if coal
Column is too small, and tunnel is easy unstability, and wall caving is serious, if coal column is excessive, layout of actual mining roadway increases in area in pressure, will make tunnel
Pressure is big, and supporting is difficult, and serious waste of resources.In order to improve roadway support structural strength and stability, while improving construction
Efficiency and brick and tile clay rate, there are mainly two types of forms for current roadway support: first is that using fashioned iron supporting, second is that using anchor
(rope) net supporting.But it finds in practical projects, the metals fashioned iron such as H steel ladder shape support for mine use and U-shaped steel arch compressibile support
Supporting construction is passive protecting, and bracket support intensity is lower, loses serious, and supporting effect is relatively poor, easily cause crush,
Cracking, absciss layer;Anchor (rope) is although net supporting is active support, due to being influenced by mining pressure, back, two sides coal
Stress of coal seam is concentrated, and situations such as have already appeared absciss layer, fragmentation, and common anchor (rope) net supporting can not meet wanting for pressure and country rock
Ask, there is anchor pole, anchor cable is broken, roof fall, two help external drum, wall caving, pucking, section reduce situations such as, seriously affect safety in production,
Safety accident even occurs.Therefore, it there is an urgent need to develop a kind of completely new tunnel Enhanced support structure, is applied with meeting gob side entry driving
The needs of work.
Summary of the invention
In order to solve the deficiency in the prior art, the present invention provides a kind of big cross section gob side entry driving coupling supporting structure and applies
Work method.
In order to realize effect above-mentioned, a kind of big cross section gob side entry driving coupling supporting structure and construction party are proposed
Method comprising following steps:
A kind of big cross section gob side entry driving coupling supporting structure, including top plate portion, goaf side section, entity coal side part and bottom
Angle anchor tube, wherein the top plate portion includes 20 × 2400mm of Ф anchor pole I, Ф 6mm steel mesh I, Ф 20mm steel bar ladder I and Ф
17.8 × 6500mm anchor cable, the Ф 6mm steel mesh I are coated on tunnel cap rock layer outer surface, and with tunnel cap rock layer
Outer surface parallelly distribute on, 20 × 2400mm of Ф anchor pole I, Ф 17.8 × 6500mm anchor cable are several, and each Ф 20 ×
2400mm anchor pole I, Ф 17.8 × 6500mm anchor cable front end pass through drilling and are embedded into the cap rock layer of tunnel, end resin
Anchor Agent and rock are bonded together, and each 20 × 2400mm of Ф anchor pole I, 17.8 × 6500mm of Ф anchor cable with Ф 6mm reinforcing bar
Net I is mutually perpendicular to be distributed, wherein the Ф 20mm steel bar ladder I is several, is uniformly distributed perpendicular to tunnel axis, is pressed in Ф 6mm
I outer surface of steel mesh forms an entirety, prevents by using anchor pole and anchor cable by steel bar ladder and the fixed top plate of steel mesh
It crushes, absciss layer.The goaf side section include Ф 6mm steel mesh II, 400 × 400 × 12 mm steel plate pallets and on
The anchor cable of one return airway supporting, the Ф 6mm steel mesh II is several, is coated on the coal wall of tunnel goaf side, described
Upper return airway supporting anchor cable it is several, the anchor cable of upper return airway supporting with tunnel goaf coal column axis
With II surface vertical distribution of Ф 6mm steel mesh, 400 × 400 × 12mm pallet is several, is pressed in outside Ф 6mm steel mesh II
Surface is simultaneously fixed on the anchor cable of upper return airway supporting by lockset, is formed to drawing anchor cable structure, the entity coal
Side section includes 20 × 2400mm of Ф anchor pole II, Ф 6mm steel mesh III, Ф 20mm steel bar ladder II, the Ф 6mm steel mesh III
Be coated on entity coal side tunnel outer surface and with tunnel coal wall outer surface parallelly distribute on, the Ф 20mm steel bar ladder II is several,
It being uniformly distributed perpendicular to tunnel axis, is pressed in Ф 6mm steel mesh net outer surface, 20 × 2400mm of Ф anchor pole II is several,
It is vertically evenly arranged in the coal wall of tunnel entity side, steel bar ladder and steel mesh is fixed on the coal wall of entity coal side tunnel.The bottom
Angle anchor tube is several, and it is corresponding that each base angle anchor tube is embedded in the corresponding tunnel bottom in tunnel goaf coal column two sides and tunnel entity side respectively
Tunnel bottom in, and the base angle anchor tube respectively with roadway floor be in 45 ° of angles.
Further, between 20 × 2400mm of Ф anchor pole I and 20 × 2400mm of Ф anchor pole II array pitch be 800 ×
800mm；The grid of Ф 6mm steel mesh I, Ф 6mm steel mesh II and Ф 6mm steel mesh III is 100 × 100mm, the Ф
The array pitch 1600mm of 17.8 × 6500mm anchor cable, every row 3.
Further, described to anchor cable structure is drawn, pulling force is not less than 100KN and the side that must not have time when drawing.
Further, the base angle anchor tube is made with diameter of the waste and old steel pipe of 50~100mm, and length is not less than
5.0m。
A kind of construction method of big cross section gob side entry driving coupling supporting structure, comprising the following steps:
Coal column pre-pouring grout: the first step carries out pre-pouring grout, slip casting hole depth 5m, array pitch to coal column using a upper return airway
1.0 × 2.0m, and drill in built-in length close to drilling depth aluminium-plastic pipe as Grouting Pipe, then select high-strength cement
Slurries carry out slip casting operation；
Anchor tube grouting in base angle on the outside of coal column: second step pricks 45 degree of construction base angles to outside coal column lower part using a upper return airway
Anchor tube is inserted into drilling, then carries out the operation of high-strength cement slurry filling to base angle anchor tube；
Third step, advanced deep hole grouting: before driving, respectively being constructed 3 advance boreholes using drilling machine in the coal wall of tunnel two sides, drilling
Long 200~300m, 75~100mm of aperture, the aluminium-plastic pipe that the built-in and close specification of drillable length is 2025 is as Grouting Pipe, slurry
Liquid selects cement base plasticity slurry, and the Seed harvest formed after grout cures forms roof Bolts Beam Support Structure with anchor pole together with aluminium-plastic pipe；
4th step, roadway support: after advanced deep hole grouting, tunneling tunnel, and in time to back, entity coal side into
Row linked network, install steel bar ladder, beat anchor pole, play anchor cable and to goaf side hanging net, install additional anchor cable pallet and to anchor cable carry out tensioning,
Complete the supporting to tunnel.
5th step, the grouting of two base angle anchor tube of tunnel: pricking 45 degree of construction base angle drillings outside two base angle of tunnel, be inserted into anchor tube,
Then the operation of high-strength cement slurry filling is carried out to anchor tube；
6th step, dynamic slip casting: the later period carries out grouting reinforcing operation to tunnel according to roadway deformation situation.
Beneficial effects of the present invention:
(1) advance reinforcement is carried out to coal column using a upper return airway, coal column is broken when reducing a working face extraction
It is bad.
(2) using to anchor cable is drawn, the high advantage of anchor cable tensile strength is played to the maximum extent, reduces secondary investment.
(3) anchor beam supporting is introduced into roadway support, not only prevents wall caving during driving, but also strengthen the supporting to lane side.
(4) pucking is administered using waste and old steel pipe as anchor tube, not only plays the role of preventing pucking, but also accomplished waste utilization.
Detailed description of the invention
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments；
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the method for the present invention flow chart.
Specific embodiment
To make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to construct, below with reference to specific implementation
Mode, the present invention is further explained.
A kind of big cross section gob side entry driving coupling supporting structure as described in Figure 1, including top plate portion, goaf side section,
Entity coal side part and base angle anchor tube, wherein top plate portion includes 20 × 2400mm of Ф anchor pole I 1, Ф 6mm steel mesh I 2, Ф
20mm steel bar ladder I 3 and 17.8 × 6500mm of Ф anchor cable 4, Ф 6mm steel mesh I 2 are coated on 5 outer surface of tunnel cap rock layer, Ф
20mm steel bar ladder I 3 is several, is pressed in I 2 outer surface of Ф 6mm steel mesh, and vertical with tunnel axis and be equally spaced, and Ф 20 ×
2400mm anchor pole I 1 passes through Ф 20mm steel bar ladder I 3, Ф 6mm steel mesh I 2, is embedded into tunnel cap rock layer 5 by drilling, and
It is bonded together by Anchor Agent and rock stratum.17.8 × 6500mm of Ф anchor cable 4 is several, and front end passes through drilling and is embedded into tunnel
It in cap rock layer 5, and is bonded together by Anchor Agent and rock stratum, 400 × 400 × 12mm pallet is fixed by lockset in rear end
In I 2 outer surface of Ф 6mm steel mesh.Goaf side section include Ф 6mm steel mesh II 6,400 × 400 × 12mm pallet 7 and on
The anchor cable 8 of one return airway supporting, Ф 6mm steel mesh II 6 several, be coated on the pine of 9 two sides of tunnel goaf side coal column
Dynamic area 10, and with 10 outer surface parallelly distribute on of the relaxation zone of 9 two sides of coal column, the anchor cable 8 of upper return airway supporting is several, on
The anchor cable 8 of one return airway supporting with 9 axis of tunnel goaf side coal column and II 6 surface vertical distribution of Ф 6mm steel mesh,
400 × 400 × 12mm pallet 7 is several, is pressed in II 6 outer surface of Ф 6mm steel mesh, and be fixed on a upper working face by lockset
On the anchor cable 8 of crossheading supporting, formed to drawing anchor cable structure.Entity coal side part includes 20 × 2400mm of Ф anchor pole II 12, Ф 6mm
Steel mesh III 13, Ф 20mm steel bar ladder II 14, Ф 6mm steel mesh III 13 be coated on 15 relaxation zone of tunnel coal wall, 16 outer surface and with
15 outer surface parallelly distribute on of tunnel coal wall, 20 × 2400mm of Ф anchor pole II 12 is several, is evenly arranged in tunnel coal wall 15, and Ф 20 ×
2400mm anchor pole II 12 is mutually perpendicular to be distributed with tunnel coal wall 15 and Ф 6mm steel mesh III 13 respectively, Ф 20mm steel bar ladder II 14
It is connected with each other by 20 × 2400mm of Ф anchor pole II 12 and III 13 outer surface of Ф 6mm steel mesh.Base angle anchor tube 11 is several, each base angle
Anchor tube 11 is embedded in the corresponding tunnel bottom in 9 two sides of tunnel goaf coal column and the corresponding tunnel bottom of tunnel coal wall 15 respectively,
And base angle anchor tube 11 is in respectively 45 ° of angles with roadway floor.
In the present embodiment, array pitch is between 20 × 2400mm of Ф anchor pole I 1 and 20 × 2400mm of Ф anchor pole II 12
800×800mm；The grid of Ф 6mm steel mesh I 2, Ф 6mm steel mesh II 6 and Ф 6mm steel mesh III 13 is 100 × 100mm,
The array pitch 1600mm of 17.8 × 6500mm of Ф anchor cable 4.
In the present embodiment, described to anchor cable structure is drawn, pulling force is not less than 100kN and the side that must not have time when drawing.
In the present embodiment, the base angle anchor tube is made with diameter of the waste and old steel pipe of 50~100mm, and length is not less than
5.0m。
A kind of construction method of big cross section gob side entry driving coupling supporting structure, comprising the following steps:
Coal column pre-pouring grout: the first step carries out pre-pouring grout, slip casting hole depth 5m, array pitch to coal column using a upper return airway
1.0 × 2.0m, and drill in built-in length close to drilling depth aluminium-plastic pipe as Grouting Pipe, then select high-strength cement
Slurries carry out slip casting operation；
Anchor tube grouting in base angle on the outside of coal column: second step pricks 45 degree of construction base angles to outside coal column lower part using a upper return airway
Anchor tube is inserted into drilling, then carries out the operation of high-strength cement slurry filling to base angle anchor tube；
Third step, advanced deep hole grouting: before driving, respectively being constructed 3 advance boreholes using drilling machine in the coal wall of tunnel two sides, drilling
Long 200~300m, 75~100mm of aperture, the aluminium-plastic pipe that the built-in and close specification of drillable length is 2025 is as Grouting Pipe, slurry
Liquid selects high-strength cement slurries, and the Seed harvest formed after grout cures forms roof Bolts Beam Support Structure with anchor pole together with aluminium-plastic pipe；
4th step, roadway support: after advanced deep hole grouting, tunneling tunnel, and in time to back, entity coal side into
Row linked network, install steel bar ladder, beat anchor pole, play anchor cable and to goaf side hanging net, install additional anchor cable pallet and to anchor cable carry out tensioning,
Complete the supporting to tunnel.
5th step, the grouting of two base angle anchor tube of tunnel: pricking 45 degree of construction base angle drillings outside two base angle of tunnel, be inserted into anchor tube,
Then the operation of high-strength cement slurry filling is carried out to anchor tube；
6th step, dynamic slip casting: the later period carries out grouting reinforcing operation to tunnel according to roadway deformation situation.
In the present embodiment, the coal column rational width 5m.
The present invention carries out advance reinforcement to coal column using a upper return airway, to coal when reducing a working face extraction
The destruction of column；Using to anchor cable is drawn, the high advantage of anchor cable tensile strength is played to the maximum extent, reduces secondary investment；By anchor
Beam supporting is introduced into roadway support, has not only prevented wall caving during driving, but also strengthen the supporting to lane side；Made using waste and old steel pipe
Pucking is administered for anchor tube, not only plays the role of preventing pucking, but also accomplished waste utilization.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (5)
1. a kind of big cross section gob side entry driving coupling supporting structure, it is characterised in that: the big cross section gob side entry driving coupling supporting
Structure includes top plate portion, goaf side section, entity coal side part and base angle anchor tube, wherein the top plate portion includes Ф
20 × 2400mm anchor pole I, Ф 6mm steel mesh I, Ф 20mm steel bar ladder I and Ф 17.8 × 6500mm anchor cable, the Ф 6mm
Steel mesh I is coated on tunnel cap rock layer outer surface, and with tunnel cap rock layer outer surface parallelly distribute on, the Ф 20 ×
2400mm anchor pole I, Ф 17.8 × 6500mm anchor cable are several, each 20 × 2400mm of Ф anchor pole I, Ф 17.8 × 6500mm anchor cable
Front end passes through drilling and is embedded into the cap rock layer of tunnel, and end is bonded together with resin anchoring agent and rock, and each Ф 20
× 2400mm anchor pole I, 17.8 × 6500mm of Ф anchor cable are mutually perpendicular to be distributed with Ф 6mm steel mesh I, wherein the Ф 20mm
Steel bar ladder I is several, is uniformly distributed perpendicular to tunnel axis, I outer surface of Ф 6mm steel mesh is pressed in, by using anchor pole and anchor cable
By on the fixed top plate of steel bar ladder and steel mesh, an entirety is formed, prevents from crushing, absciss layer, the goaf side section
Anchor cable including Ф 6mm steel mesh II, 400 × 400 × 12mm steel plate pallet and upper return airway supporting, the Ф
6mm steel mesh II is several, is coated on the coal wall of tunnel goaf side, and the anchor cable of the upper return airway supporting is several,
The anchor cable of upper return airway supporting with II surface vertical distribution of tunnel goaf coal column axis and Ф 6mm steel mesh, institute
400 × 400 × 12mm pallet stated is several, is pressed in II outer surface of Ф 6mm steel mesh and is fixed on a upper working face by lockset
On the anchor cable of crossheading supporting, formed to anchor cable structure is drawn, the entity coal side part includes 20 × 2400mm of Ф anchor pole II, Ф
6mm steel mesh III, Ф 20mm steel bar ladder II, the Ф 6mm steel mesh III are coated on entity coal side tunnel outer surface and and lane
Road coal wall outer surface parallelly distribute on, the Ф 20mm steel bar ladder II is several, is uniformly distributed perpendicular to tunnel axis, is pressed in Ф
III outer surface of 6mm steel mesh, 20 × 2400mm of Ф anchor pole II is several, is vertically evenly arranged in the coal wall of tunnel entity side, will
Steel bar ladder and steel mesh are fixed on the coal wall of entity coal side tunnel, and the base angle anchor tube is several, and each base angle anchor tube is embedded in respectively
In the corresponding tunnel bottom in the corresponding tunnel bottom in tunnel goaf coal column two sides and tunnel entity side, and the base angle anchor tube
It is in respectively 45 ° of angles with roadway floor.
2. a kind of big cross section gob side entry driving coupling supporting structure according to claim 1, it is characterised in that: the Ф 20
Array pitch is 800 × 800mm between × 2400mm anchor pole I and 20 × 2400mm of Ф anchor pole II；Ф 6mm steel mesh I, Ф 6mm steel
The grid of muscle net II and Ф 6mm steel mesh III is 100 × 100mm, the array pitch of Ф 17.8 × 6500mm anchor cable
1600mm。
3. a kind of big cross section gob side entry driving coupling supporting structure according to claim 1, it is characterised in that: described to drawing
Anchor cable structure, pulling force is not less than 100kN and the side that must not have time when tensioning.
4. a kind of big cross section gob side entry driving coupling supporting structure according to claim 1, it is characterised in that: the base angle
Anchor tube is made with diameter of the waste and old steel pipe of 50~100mm, and length is not less than 5.0m.
5. a kind of construction method of big cross section gob side entry driving coupling supporting structure, it is characterised in that: the big cross section is along empty pick
The construction method of lane coupling supporting structure the following steps are included:
Coal column pre-pouring grout: the first step carries out pre-pouring grout, slip casting hole depth 5m, array pitch to coal column using a upper return airway
1.0 × 2.0m, and drill in built-in length close to drilling depth aluminium-plastic pipe as Grouting Pipe, then select high-strength cement
Slurries carry out slip casting operation；
Anchor tube grouting in base angle on the outside of coal column: second step pricks 45 degree of construction base angles to outside coal column lower part using a upper return airway
Anchor tube is inserted into drilling, then carries out the operation of high-strength cement slurry filling to base angle anchor tube；
Third step, advanced deep hole grouting: before driving, respectively being constructed 3 advance boreholes using drilling machine in the coal wall of tunnel two sides, drilling
Long 200~300m, 75~100mm of aperture, the aluminium-plastic pipe that the built-in and close specification of drillable length is 2025 is as Grouting Pipe, slurry
Liquid selects high-strength cement slurries, and the Seed harvest formed after grout cures forms roof Bolts Beam Support Structure with anchor pole together with aluminium-plastic pipe；
4th step, roadway support: after advanced deep hole grouting, tunneling tunnel, and in time to back, entity coal side into
Row linked network, install steel bar ladder, beat anchor pole, play anchor cable and to goaf side hanging net, install additional anchor cable pallet and to anchor cable carry out tensioning,
Complete the supporting to tunnel；
The grouting of two base angle anchor tube of tunnel: 5th step pricks 45 degree of construction base angle drillings outside two base angle of tunnel, is inserted into anchor tube, then
High-strength cement slurry is carried out to anchor tube, operation is perfused；
6th step, dynamic slip casting: the later period carries out grouting reinforcing operation to tunnel according to roadway deformation situation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810780623.3A CN108930543A (en) | 2018-07-17 | 2018-07-17 | A kind of big cross section gob side entry driving coupling supporting structure and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810780623.3A CN108930543A (en) | 2018-07-17 | 2018-07-17 | A kind of big cross section gob side entry driving coupling supporting structure and construction method |
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| CN201810780623.3A Pending CN108930543A (en) | 2018-07-17 | 2018-07-17 | A kind of big cross section gob side entry driving coupling supporting structure and construction method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109505639A (en) * | 2019-01-04 | 2019-03-22 | 山东科技大学 | A kind of gob side entry driving coal column hardened system and its application method |
| CN109958454A (en) * | 2019-04-23 | 2019-07-02 | 河南理工大学 | Stope drift active workings pucking control system and its control method |
| CN110043294A (en) * | 2019-05-30 | 2019-07-23 | 中国五冶集团有限公司 | Positioning device and application method for the connection of Tunnel bracing members |
| CN110486016A (en) * | 2019-08-16 | 2019-11-22 | 山东科技大学 | A method of improving strip coal pillar stability |
| CN112943264A (en) * | 2021-02-19 | 2021-06-11 | 国家能源集团宁夏煤业有限责任公司 | Construction method for fully-mechanized mining face retraction channel |
| CN113107489A (en) * | 2021-04-21 | 2021-07-13 | 宿州市金鼎安全技术股份有限公司 | High-ground-pressure three-soft coal seam along-empty crossheading advanced grouting reinforcement method |
| CN113863956A (en) * | 2021-09-24 | 2021-12-31 | 国家能源集团宁夏煤业有限责任公司 | Crossheading and roadway passing method for underground working face of coal mine |
| CN113882884A (en) * | 2021-10-29 | 2022-01-04 | 国能神东煤炭集团有限责任公司 | Grouting anchor rod device for reinforcing gob-side entry driving narrow coal pillar |
| CN115288759A (en) * | 2022-06-17 | 2022-11-04 | 贵州盘江精煤股份有限公司 | Gob-side entry driving anchoring method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109505639A (en) * | 2019-01-04 | 2019-03-22 | 山东科技大学 | A kind of gob side entry driving coal column hardened system and its application method |
| CN109505639B (en) * | 2019-01-04 | 2020-03-31 | 山东科技大学 | Gob-side entry driving coal pillar reinforcing system and using method thereof |
| CN109958454A (en) * | 2019-04-23 | 2019-07-02 | 河南理工大学 | Stope drift active workings pucking control system and its control method |
| CN110043294A (en) * | 2019-05-30 | 2019-07-23 | 中国五冶集团有限公司 | Positioning device and application method for the connection of Tunnel bracing members |
| CN110486016A (en) * | 2019-08-16 | 2019-11-22 | 山东科技大学 | A method of improving strip coal pillar stability |
| CN112943264A (en) * | 2021-02-19 | 2021-06-11 | 国家能源集团宁夏煤业有限责任公司 | Construction method for fully-mechanized mining face retraction channel |
| CN113107489A (en) * | 2021-04-21 | 2021-07-13 | 宿州市金鼎安全技术股份有限公司 | High-ground-pressure three-soft coal seam along-empty crossheading advanced grouting reinforcement method |
| CN113863956A (en) * | 2021-09-24 | 2021-12-31 | 国家能源集团宁夏煤业有限责任公司 | Crossheading and roadway passing method for underground working face of coal mine |
| CN113863956B (en) * | 2021-09-24 | 2023-08-22 | 国家能源集团宁夏煤业有限责任公司 | Coal mine underground working face gateway roadway passing method |
| CN113882884A (en) * | 2021-10-29 | 2022-01-04 | 国能神东煤炭集团有限责任公司 | Grouting anchor rod device for reinforcing gob-side entry driving narrow coal pillar |
| CN113882884B (en) * | 2021-10-29 | 2023-08-08 | 国能神东煤炭集团有限责任公司 | Grouting anchor rod device for reinforcing gob-side entry driving narrow coal pillar |
| CN115288759A (en) * | 2022-06-17 | 2022-11-04 | 贵州盘江精煤股份有限公司 | Gob-side entry driving anchoring method |
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Application publication date: 20181204 |