CN217176650U - Legless support and support system for coal mine tunneling - Google Patents
Legless support and support system for coal mine tunneling Download PDFInfo
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- CN217176650U CN217176650U CN202220661251.4U CN202220661251U CN217176650U CN 217176650 U CN217176650 U CN 217176650U CN 202220661251 U CN202220661251 U CN 202220661251U CN 217176650 U CN217176650 U CN 217176650U
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Abstract
The utility model provides a colliery is tunneled with legless supporting and timbering system, colliery is tunneled with legless supporting and includes: each arch structure comprises three sections, each two sections are connected by a clamping cable, and thick steel plates are welded at the lower ends of the U-shaped steel supporting legs of the arch base lines of the arch structures and close to the bottom plate; two round holes are cut at the arch base line of the arch structure, the round steel is welded on the two round holes, every two arch structures are connected through the round steel in a welding mode, and the top of each arch structure is fixed with the outside rock wall. The utility model provides a supporting device among the prior art strut the difficulty and have a lot of insecurity factors and the poor scheduling problem of tunnelling roadway shaping. Adopt the utility model provides a colliery is driped with legless supporting and can be carried out safety protection, legless design makes whole operation more smooth and easy moreover.
Description
Technical Field
The utility model relates to a colliery field especially relates to a colliery is tunneled with legless supporting and timbering system.
Background
The newly-built auxiliary inclined shaft of the upper bay coal mine is positioned in a four-panel area of the upper bay coal mine, the south side of a shaft is adjacent to a 1-2 coal seam, namely a coal mining roadway, part of the roadway is in use at present, and the coal seam on the north side of the shaft is not mined and is a planned mining area. The well mouth position coordinate of the newly-built auxiliary inclined shaft is 4349061.4, Y is 37423009.2, the tunneling azimuth angle is 243 degrees, the inclination angle of the shaft is 5.5 degrees, the shaft inclination length is 297m, the semi-circular arch is designed, the full width of the tunneling section is 7.2 m, and the full height is 7.27 m.
And the shaft enters a bedrock section after passing through the open slot excavation section, and the rock stratum of the bedrock section is grey-grey and grey-green strongly weathered siltstone and locally sanded siltstone. A group of medium-inclination-angle cracks develops in the rock mass, the integrity is good, the rock is easy to break, and the rock is easy to soften and disintegrate when meeting water. The section mainly comprises straight-luo group siltstone, sandy mudstone, Yan's group siltstone and sandy mudstone, the integrity of the rock mass mostly belongs to V-type unstable rock mass and IV-type weak stable rock mass, the water inflow amount of a straight-luo group hydrous rock stratum section (the horizontal length is 721m) is 7.14m3/s, and the water inflow amount of a medium-dwarassic group Yanan group 1-2 coal hydrous rock stratum section (the horizontal length is 339m) is 0.91m 3/s. According to geological exploration data, when strong weathering bedrock is tunneled, a shaft with an ultra-large section is tunneled according to blasting tunneling and fully mechanized excavating machines, the problems of large lithological disturbance, difficulty in construction and supporting, many insecurity factors, poor tunneling roadway forming and the like exist.
SUMMERY OF THE UTILITY MODEL
Based on above problem, the utility model provides a colliery is tunneled with legless supporting and timbering system has solved the supporting device among the prior art and has strutted the difficulty and have a lot of insecurity factors and the poor scheduling problem of tunnelling roadway shaping.
The utility model provides a colliery is driped with legless supporting, include:
each arch structure comprises three sections, each two sections are connected by a clamping cable, and thick steel plates are welded at the lower ends of the U-shaped steel supporting legs of the arch base lines of the arch structures and close to the bottom plate;
two round holes are cut at the arch base line of the arch structure, the round steel is welded on the two round holes, every two arch structures are connected through the round steel in a welding mode, and the top of each arch structure is fixed with the outside rock wall.
In addition, the arch structure is made of steel frame material.
In addition, 29u steel is adopted for the arch structure.
In addition, the steel frame is sprayed with double-layer reinforced concrete with the thickness of 500 mm.
In addition, two round holes are drilled on the coal walls on two sides of the U-shaped steel, and the U-shaped clamp penetrates through the two round holes to be fixed with the rock wall.
The utility model also provides a supporting system, include:
the anchor rod, the metal net and the legless support for coal mine tunneling are fixed, after the anchor rod is fixed to a rock wall, the metal net is fixed to the anchor rod, and the legless support for coal mine tunneling is fixed to the anchor rod through an iron wire;
the legless support for coal mine tunneling comprises:
each arch structure comprises three sections, each two sections are connected by a clamping cable, and thick steel plates are welded at the lower ends of the U-shaped steel supporting legs of the arch base lines of the arch structures and close to the bottom plate;
two round holes are cut at the arch base line of the arch structure, the round steel is welded on the two round holes, every two arch structures are connected through the round steel in a welding mode, and the top of each arch structure is fixed with the outside rock wall.
In addition, the arch structure is made of steel frame material.
In addition, 29u steel is adopted for the arch structure.
In addition, the steel frame is sprayed with double-layer reinforced concrete with the thickness of 500 mm.
In addition, two round holes are drilled on the coal walls on two sides of the U-shaped steel, and the U-shaped clamp penetrates through the two round holes to be fixed with the rock wall.
The utility model provides a supporting device among the prior art strut the difficulty and have a lot of insecurity factors and the poor scheduling problem of tunnelling roadway shaping. Adopt the utility model provides a colliery is driped with legless supporting and can be carried out safety protection, legless design makes whole operation more smooth and easy moreover.
Drawings
Fig. 1 is a schematic structural view of a legless support for coal mine excavation according to an embodiment of the present invention;
fig. 2 is an exploded view of a legless support for coal mine excavation according to an embodiment of the present invention;
fig. 3 is a schematic view of a cable in a legless support for coal mine excavation according to an embodiment of the present invention;
fig. 4 is a schematic view of a round hole in a legless support for coal mine excavation according to an embodiment of the present invention;
fig. 5 is a schematic view of a legless support medium steel plate for coal mine excavation according to an embodiment of the present invention;
fig. 6 is a schematic view of round steel in a legless support for coal mine excavation according to an embodiment of the present invention;
fig. 7 is an overall schematic view of a legless support for coal mine excavation according to an embodiment of the present invention.
Detailed Description
The present invention is described in further detail below with reference to specific embodiments and the attached drawings. It is intended that the present invention not be limited to the particular embodiments disclosed, but that the present invention will include all embodiments falling within the scope of the appended claims.
Referring to fig. 1-6, the utility model provides a colliery is tunneled with legless supporting, include:
the device comprises a plurality of arch structures 1, wherein each arch structure comprises three sections, each two sections are connected by a clamping cable 2, and thick steel plates 8 are welded at the lower ends of U-shaped steel supporting legs of arch base wires 3 of the arch structures, close to a bottom plate;
two round holes 4 are cut at the arch base line 3 of the arch structure 1, the round steel 6 is welded on the two round holes 4, the two arch structures 1 are connected through the round steel 6 in a welding mode, and the top of each arch structure 1 is fixed with the outside rock wall.
The utility model provides a colliery is tunneled with legless supporting includes a plurality of domes 1, presses close to bottom plate department welding steel plate 8 at U shaped steel landing leg lower extreme of the arch baseline 3 of domes to play the effect of support. The cutting of 3 departments of arch base line at domes 1 has two round holes 4 for weld round steel 6, two domes around connecting, optionally, make two round holes on the coal wall of U shaped steel both sides and provide U type checkpost, make it fix domes on the coal wall through the round hole, and at this moment, round steel 6 plays the effect of supporting U type checkpost simultaneously.
According to the design of a tunnel, the tunneling section is in a semicircular arch shape, the size is 7.2, the height is 7.27m, the rock mass section is mainly characterized by comprising straight rock set siltstone, sandy mudstone and Yangan set siltstone and sandy mudstone, and uncertain potential safety hazards such as roof collapse, great collapse construction difficulty and the like are easily caused by great disturbance to the rock mass when blasting tunneling is adopted. Under the condition of reducing the disturbance of the rock mass with the property as much as possible, a crawler-type small-loose PC160LC-7 excavator is matched with a hydraulic breaking hammer for breaking and tunneling. Firstly, full-face tunneling is carried out from a semicircular arch, the circulation progress is 1 meter, and 1m of support is tunneled for 1 m.
Referring to fig. 7, alternatively, after the tunneling is finished, the metal mesh and the anchor rods are supported, the phi 18 x 2100 deformed steel bar anchor rods are adopted, the row spacing between the arch anchor rods is 700 x 700mm, and the row spacing between the two sides is 800 x 700 mm. The anchor is provided with the dosage form number MSCK23/50, and the initial anchoring force of the anchor is not less than 50KN per hole of 2 coils. The metal mesh is welded by phi 6.5 steel bars, the mesh size of the metal mesh is 100 multiplied by 100mm, and the steel bar mesh is lapped by 100 mm. Supporting is carried out next to the 29U-shaped steel frame, three sections are processed and manufactured on the 29U-shaped steel arch base line of the support, the sections are connected in a clamping mode, and the overlapping length of the 29U-shaped steel is 500 mm. Each frame has 2 clips, two sections under the arch base line are in a legless shed form by adopting full-welding connection, and the bottom feet are 200 × 400 × 10mm thick steel plates. The 29U-shaped steel frames are fixed by directly welding round steel with the diameter of 20mm on the 29U-shaped steel frames and are used for fixing the steel frames between the frames. Round holes are cut at the arch base lines of each 29U-shaped steel frame, and U-shaped clamps made of phi 32 threaded steel penetrate through the round holes to be drilled and fixed on the rock wall. 29U type steel frame top arch is fixed and is utilized former supporting stock, adopts 8# iron wire fixed. And (5) immediately performing concrete spraying support after the 29U-shaped steel frame is fixed, wherein the strength grade is C20. And finally, adopting double-layer reinforced concrete with the thickness of 500mm to carry out permanent support. In fig. 7, the anchor rods 11 are deformed steel bar resin anchor rods, iron wires 12 are used for fixing the anchor rods 11 and 29U-shaped steel frames, double-layer reinforced concrete 13 is sprayed on a steel frame and is fixed by deformed steel bar 14 with a diameter of 32 mm, and the distance 15 between the steel frames is 500 mm.
The embodiment solves the problems that the supporting device in the prior art is difficult to support and has many unsafety factors, poor forming of a driving roadway and the like. The legless support for coal mine tunneling provided by the embodiment can be used for safety protection, and the legless design enables the whole operation to be smoother.
In one embodiment, the arch structure is made of steel frame. The steelframe material is firmer, and the holding power is good.
In one embodiment, the arch structure is 29 u-shaped steel 5. The purpose of using 29u section steel is to be strong and light.
In one embodiment, double-layer reinforced concrete with the thickness of 500mm is sprayed on the steel frame. The strength of the concrete is enhanced by spraying double-layer reinforced concrete with the thickness of 500 mm.
In one embodiment, two round holes are drilled on the coal wall on two sides of the U-shaped steel, and the U-shaped clamp 7 passes through the two round holes to be fixed with the rock wall. Pass the round hole through U type checkpost 7 and be fixed with the cliff, make the steelframe more firm. Meanwhile, the round steel 6 supports the U-shaped clamp 7, so that the whole structure is more stable.
Referring to fig. 1-7, the present invention also provides a supporting system, comprising:
the anchor rod, the metal net and the legless support for coal mine tunneling are fixed, after the anchor rod is fixed to a rock wall, the metal net is fixed to the anchor rod, and the legless support for coal mine tunneling is fixed to the anchor rod through an iron wire;
the legless support for coal mine tunneling comprises:
the device comprises a plurality of arch structures 1, wherein each arch structure comprises three sections, each two sections are connected by a clamping cable 2, and thick steel plates 8 are welded at the lower ends of U-shaped steel supporting legs of arch base wires 3 of the arch structures, close to a bottom plate;
two round holes 4 are cut at the arch base line 3 of the arch structure 1, the round steel 6 is welded on the two round holes 4, the two arch structures 1 are connected through the round steel 6 in a welding mode, and the top of each arch structure 1 is fixed with the outside rock wall.
The utility model provides a colliery is tunneled with legless supporting includes a plurality of domes 1, presses close to bottom plate department welding steel plate 8 at U shaped steel landing leg lower extreme of the arch baseline 3 of domes to play the effect of support. The cutting of 3 departments of arch base line at domes 1 has two round holes 4 for weld round steel 6, two domes around connecting, optionally, make two round holes on the coal wall of U shaped steel both sides and provide U type checkpost, make it fix domes on the coal wall through the round hole, and at this moment, round steel 6 plays the effect of supporting U type checkpost simultaneously.
The embodiment solves the problems that the supporting device in the prior art is difficult to support and has many unsafety factors, poor forming of a driving roadway and the like. The legless support for coal mine tunneling provided by the embodiment can be used for safety protection, and the legless design enables the whole operation to be smoother.
In one embodiment, the arch structure is made of steel frame. The steelframe material is firmer, and the holding power is good.
In one embodiment, the arch structure is 29 u-shaped steel 5. The purpose of using 29u section steel is to be strong and light.
In one embodiment, double-layer reinforced concrete with the thickness of 500mm is sprayed on the steel frame. The strength of the concrete is enhanced by spraying double-layer reinforced concrete with the thickness of 500 mm.
In one embodiment, two round holes are drilled on the coal wall on two sides of the U-shaped steel, and the U-shaped clamp 7 passes through the two round holes to be fixed with the rock wall. Pass the round hole through U type checkpost 7 and be fixed with the cliff, make the steelframe more firm. Meanwhile, the round steel 6 supports the U-shaped clamp 7, so that the whole structure is more stable.
What has been described above is merely the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, on the basis of the principle of the present invention, several other modifications can be made, and the protection scope of the present invention should be considered.
Claims (10)
1. The utility model provides a colliery is driped with legless support which characterized in that includes:
each arch structure comprises three sections, each two sections are connected by a clamping cable, and thick steel plates are welded at the lower ends of the U-shaped steel supporting legs of the arch base lines of the arch structures and close to the bottom plate;
two round holes are cut at the arch base line of the arch structure, the round steel is welded on the two round holes, every two arch structures are connected through the round steel in a welding mode, and the top of each arch structure is fixed with the outside rock wall.
2. The legless support for coal mine excavation according to claim 1,
the arch structure is made of steel frame material.
3. The legless support for coal mine excavation according to claim 2,
the arch structure adopts 29u section steel.
4. The legless support for coal mine excavation according to claim 2,
and double-layer reinforced concrete with the thickness of 500mm is sprayed on the steel frame.
5. A legless support for coal mine excavation according to any one of claims 1 to 4,
two round holes are drilled on the coal walls on two sides of the U-shaped steel, and the U-shaped clamp penetrates through the two round holes to be fixed with the rock wall.
6. A timbering system, comprising:
the anchor rod, the metal net and the legless support for coal mine tunneling are fixed, after the anchor rod is fixed to a rock wall, the metal net is fixed to the anchor rod, and the legless support for coal mine tunneling is fixed to the anchor rod through an iron wire;
the legless support for coal mine tunneling comprises:
each arch structure comprises three sections, each two sections are connected by a clamping cable, and thick steel plates are welded at the lower ends of the U-shaped steel supporting legs of the arch base lines of the arch structures and close to the bottom plate;
two round holes are cut at the arch base line of the arch structure, the round steel is welded on the two round holes, every two arch structures are connected through the round steel in a welding mode, and the top of each arch structure is fixed with the outside rock wall.
7. The support system of claim 6,
the arch structure is made of steel frame material.
8. The support system of claim 7,
the arch structure adopts 29u section steel.
9. The support system of claim 7,
and double-layer reinforced concrete with the thickness of 500mm is sprayed on the steel frame.
10. The support system according to any one of claims 6 to 9,
two round holes are drilled on the coal walls on two sides of the U-shaped steel, and the U-shaped clamp penetrates through the two round holes to be fixed with the rock wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220661251.4U CN217176650U (en) | 2022-03-24 | 2022-03-24 | Legless support and support system for coal mine tunneling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220661251.4U CN217176650U (en) | 2022-03-24 | 2022-03-24 | Legless support and support system for coal mine tunneling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217176650U true CN217176650U (en) | 2022-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220661251.4U Active CN217176650U (en) | 2022-03-24 | 2022-03-24 | Legless support and support system for coal mine tunneling |
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| CN (1) | CN217176650U (en) |
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- 2022-03-24 CN CN202220661251.4U patent/CN217176650U/en active Active
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