CN221400608U - Tunnel anchor notes supporting construction - Google Patents
Tunnel anchor notes supporting construction Download PDFInfo
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- CN221400608U CN221400608U CN202323558696.3U CN202323558696U CN221400608U CN 221400608 U CN221400608 U CN 221400608U CN 202323558696 U CN202323558696 U CN 202323558696U CN 221400608 U CN221400608 U CN 221400608U
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- anchor
- grouting
- hollow grouting
- roadway
- hollow
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- 238000010276 construction Methods 0.000 title claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 claims description 20
- 239000010959 steel Substances 0.000 claims description 20
- 238000004873 anchoring Methods 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- 238000002347 injection Methods 0.000 abstract description 4
- 239000007924 injection Substances 0.000 abstract description 4
- 238000003825 pressing Methods 0.000 abstract description 2
- 239000011435 rock Substances 0.000 description 26
- 239000002002 slurry Substances 0.000 description 6
- 239000003245 coal Substances 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
The utility model discloses a tunnel anchor grouting supporting structure which comprises a hollow grouting anchor rod, a hollow grouting anchor rope and a water guide pipe, wherein the hollow grouting anchor rope comprises a first hollow grouting anchor rope and a second hollow grouting anchor rope which are respectively arranged on a top plate and a side part of a tunnel, the hollow grouting anchor rod is arranged at the bottom corners of the two sides, the water guide pipe is arranged at the lower parts of the two sides, and the water guide pipe guides water to a drainage ditch. The utility model adopts the mode of anchor injection to support the water guide pipe, thereby solving the problems of roof pressing, side bulging, floor bulge and the like of the roadway.
Description
Technical Field
The utility model relates to a roadway anchor grouting support structure, and belongs to the technical field of coal mine support structures.
Background
The water outlet section appears when the coal is transported from a certain mine down the mountain, the production and environmental sanitation are affected, the engineering quantity is about 80 meters, the water outlet is linear, no pressure exists, no dynamic pressure is generated, no empty and old roadway water accumulation exists on the water outlet section, and the water outlet section belongs to sandstone crack water and needs grouting and water shutoff.
The analysis of the existing supporting conditions of a certain coal transportation and downhill climbing is as follows:
An anchor net rope spraying support (existing support) is adopted during the period of digging a certain coal conveying down a mountain, the spraying thickness is 100mm, the tunnel section is a semicircular arch section, the barren lower width B=5.2m, the barren middle height H=3.6m, and the barren section area S=16.4m2; net lower width b=5.0 m, net middle height h=3.5 m, net cross-sectional area s=15.5m2.
(2) And (3) anchor rod: the upper anchor is supported by using an M20-1740 equal-strength full-thread anchor rod; the roof bolt is supported by using an M20-2420 equal-strength full-thread bolt.
(3) And (3) anchor cables: a cable bolt with a diameter of 17.8mm and a length of 6m was used.
(4) The row spacing between the anchor cable supports is 2100 multiplied by 1400mm, and the anchor cable supports are in a 3-0-3 mode.
(5) In the later construction process, the anchor cable is encrypted due to obvious roadway pressure, large roadway deformation and the like, and the row spacing between anchor cable supports is 1400 multiplied by 1400mm, so that the supports are in a 4-0-4 mode.
(6) And in the later stage, carrying out back shed (shed specification is 5.1 multiplied by 3.4m metal U-shaped shed, and shed distance is 0.7 m) on the heavy deformation section of the tunnel roof.
The arrangement of the roadways is as follows:
Design section: mao Kuan maoGao=5.1x3.4 meters, gunite thickness 100mm, double semi-circular arch tunnel.
Original support form: and (5) spraying an anchor net rope, and repairing the rear frame metal shed.
The tunnel has the problems of roof pressing, side part bulging, floor bulge and the like due to the influence of mine ground pressure and structural stress.
Disclosure of utility model
The utility model aims to solve the technical problems that: the roadway anchoring and grouting supporting structure is provided to solve the technical problems in the prior art.
The technical scheme adopted by the utility model is as follows: the roadway anchor grouting supporting structure comprises a hollow grouting anchor rod, a hollow grouting anchor rope and a water guide pipe, wherein the hollow grouting anchor rope comprises a first hollow grouting anchor rope and a second hollow grouting anchor rope which are respectively arranged on a top plate and a side part of a roadway, the size of the first hollow grouting anchor rope is phi 22 multiplied by 4300, and the interval is 1400 multiplied by 1400mm; the second hollow grouting anchor cable has the size of phi 22 multiplied by 4300 and the interval row distance of 1400 multiplied by 1400mm; the hollow grouting anchor rod is arranged at the bottom corners of two sides, the model is M20-2470, and the interval is 700X 700mm; the water guide pipe is arranged at the lower part of the two walls, and the water guide pipe guides water to the drainage ditch.
Preferably, the specification of the hollow grouting anchor cable is SKZ22-1860-4300.
Preferably, the end part of the hollow grouting anchor cable is connected with a resin end anchor.
Preferably, the hollow grouting anchor cable comprises a middle grouting core pipe and a plurality of high-strength spiral rib steel wires fixed on the periphery of the grouting core pipe.
Preferably, the tail part of the hollow grouting anchor cable is connected with a grouting joint matched with a grouting pump.
Preferably, the anchoring length of the inner end of the hollow grouting anchor cable is 1000mm, the inner end of the hollow grouting anchor cable is sealed by a built-in hole packer, the exposure of the inner end of the hollow grouting anchor cable is 270-290mm, the used tray is a butterfly tray with the specification of 300 x 16mm, and 5.0 sets of hollow grouting anchor cables are used in each meter of roadway.
Preferably, the specification of the hollow grouting anchor rod is MZGK to 190-42/24.
Preferably, the exposed length of the hollow grouting anchor rod is 50mm, the size of a used tray is 150 x 10mm, and 1.429 sets of hollow grouting anchor rods are used in each meter of roadway.
Preferably, the first hollow grouting anchor cable comprises a middle grouting core pipe and a plurality of high-strength spiral rib steel wires fixed on the periphery of the grouting core pipe.
Preferably, the second hollow grouting anchor cable comprises a middle grouting core pipe and a plurality of high-strength spiral rib steel wires fixed on the periphery of the grouting core pipe.
Anchor injection supporting principle:
By adopting the anchor injection supporting technology, the effects of improving the mechanical property of surrounding rock, enhancing the integrity of the surrounding rock and controlling the deformation of the surrounding rock can be achieved, and particularly, the action mechanism of the anchor injection supporting technology comprises the following aspects:
(1) Grouting is performed by adopting grouting anchor rods (ropes), so that cracks of surrounding rock can be plugged by using slurry, air is isolated, the surrounding rock is prevented from being weathered, the surrounding rock is prevented from being soaked by water, and the strength of the surrounding rock is reduced;
(2) After grouting, the loose and broken surrounding rock is glued into a whole, so that the cohesive force, the internal friction angle and the elastic modulus of the rock mass are improved, the strength of the rock mass is improved, and the surrounding rock can be used as a part of a supporting structure;
(3) The grouting anchor rod (cable) is grouted to enable the filling of the wall of the sprayed layer to be compact, so that the load can be ensured to uniformly act on the sprayed layer, and the phenomenon that the stress concentration point is damaged at first is avoided;
(4) Grouting anchor rods (ropes) are utilized to fill surrounding rock cracks, and anchor spraying support is matched, so that a multi-layer effective combined arch can be formed, namely a net spraying combined arch, an anchor rod (rope) compression area combined arch and a slurry diffusion reinforcement arch, and the formed multi-layer combined arch structure expands the effective bearing range of the support structure and improves the integrity and bearing capacity of the support structure;
(5) After grouting, the thickness of the combined arch is increased, so that the concentration of the load acting on the bottom plate can be reduced, the stress in the bottom plate rock is reduced, the plastic deformation of the bottom plate is weakened, and the floor heave is reduced. The stability of the bottom plate is favorable for the stability of the two sides, and the stability of the vault can be maintained under the condition that the bottom plate and the two sides are stable, so that the stability of the whole supporting structure is ensured;
(6) The grouting anchor rod (rope) is an anchor rod (rope) with full-length anchoring, and the end anchors are changed into full-length anchoring anchor rods through grouting, so that the multi-layer combined arches are connected into a whole and bear together, and the integrity of the supporting structure is improved;
(7) Grouting increases the size of the supporting structure surface, reduces the bending moment generated by the load of surrounding rock acting on the supporting structure, and reduces the tensile stress and the compressive stress generated in the supporting structure, so that the supporting structure can bear larger load, improves the bearing capacity of the supporting structure, and expands the adaptability of the supporting structure;
(8) The grouting surrounding rock has good integrity and forms a whole with the original rock, so that the surrounding rock is stable under the action of large structural stress and is not easy to damage;
(9) Under the action of pumping pressure, the grouting slurry can not only fill the rock mass cracks which are communicated with each other, but also compress the closed cracks and pores which are not filled under the action of pressure, thereby realizing the function of compacting the whole rock mass. As a result of compaction, the modulus of elasticity of the rock mass is increased, as is the strength.
(10) By grouting, filling, compacting and cementing the stratum of the water drenching area, water is blocked, sealed or led to the lower part of the two walls and then guided into the ditch.
The utility model has the beneficial effects that:
1. Compared with the prior art, the utility model has the advantages that the first hollow grouting anchor cable and the second hollow grouting anchor cable are respectively arranged on the top plate and the upper part of the roadway, the hollow grouting anchor rod is arranged at the bottom corners of the two upper parts, the water guide pipe is arranged at the lower part of the two upper parts, and the water guide pipe guides water to the drainage ditch.
2. The novel hollow grouting anchor cable of the resin end anchor and the post grouting full anchor manufactured by adopting the spiral rib prestressed steel wire is independently developed. The hollow grouting anchor cable adopts novel spiral rib prestressed steel wires. The high-strength screw rib prestressed steel wire is a new type deformed steel wire, and is characterized by that its steel wire surface has several continuous raised screw ribs, and the screw ribs and base circle are integrated into one body, and can be formed into the steel wire with identical cross section.
Drawings
FIG. 1 is a schematic cross-sectional view of a roadway employing the support of the present utility model.
Figure 2 is a schematic cross-sectional view of a hollow grouting anchor cable of the present utility model.
Detailed Description
The utility model will be further described with reference to the accompanying drawings and specific examples.
Reference numerals in the drawings of the specification include: the grouting anchor cable comprises a first hollow grouting anchor cable 1, a grouting core pipe 11, high-strength spiral rib steel wires 12, a second hollow grouting anchor cable 2, a hollow grouting anchor rod 3 and a water guide pipe 4.
Example 1:
The tunnel anchor grouting support structure comprises a hollow grouting anchor rod 3, a hollow grouting anchor rope and a water guide pipe 4, wherein the specification of the hollow grouting anchor rope is SKZ22-1860-4300, the end part of the hollow grouting anchor rope is connected with a resin end anchor, the tail part of the hollow grouting anchor rope is connected with a grouting joint matched with a grouting pump, the anchoring length of the inner end of the hollow grouting anchor rope is 1000mm, the inner end of the hollow grouting anchor rope is sealed by adopting a built-in hole packer, the exposure of the inner end of the hollow grouting anchor rope is 270mm, a used tray is a butterfly tray with the specification of 300 x 16mm, and 5.0 sets of hollow grouting anchor ropes are used in each meter tunnel. The hollow grouting anchor cable comprises a first hollow grouting anchor cable 1 and a second hollow grouting anchor cable 2 which are respectively arranged on a top plate and a side part of a roadway, wherein the size of the first hollow grouting anchor cable 1 is phi 22 multiplied by 4300, and the interval is 1400 multiplied by 1400mm; the second hollow grouting anchor cable 2 has the size phi 22 multiplied by 4300 and the interval row spacing of 1400 multiplied by 1400mm; as shown in fig. 2, the first hollow grouting anchor 1 includes a central grouting core tube 11 and a plurality of high-strength spiral rib wires 12 fixed to the outer periphery of the grouting core tube 11. The second hollow grouting anchor cable 2 has the same structure as the first hollow grouting anchor cable 1. The grouting anchor cable adopts a drill bit with the diameter of 32mm to drill holes, and the grouting material is 4-type material.
The utility model independently develops a novel hollow grouting anchor cable of a resin end anchor and a post grouting full anchor which are manufactured by adopting spiral rib prestressed steel wires. The hollow grouting anchor cable adopts novel spiral rib prestressed steel wires. The high-strength screw rib prestressed steel wire is a new type deformed steel wire, and is characterized by that its steel wire surface has several continuous raised screw ribs, and the screw ribs and base circle are integrated into one body, and can be formed into the steel wire with identical cross section.
The hollow grouting anchor cable of the utility model is characterized in that:
(1) The product adopts the resin end anchor, and the installation is completely the same as that of a common resin anchor cable, and no equipment is required to be added. And the tensioning jack is used for pre-tightening, the pre-tightening force is high, and the bearing is carried immediately.
(2) The cable body is of a novel hollow structure, is provided with a grouting core pipe 11, and adopts a reverse grouting mode to inject inorganic reinforcing materials into a drilled hole, so that full-length anchoring of the anchor cable and grouting reinforcement of surrounding rock are realized.
(3) The cable body is processed by adopting the high-strength spiral rib steel wire 12, so that the surface roughness of the cable body is improved, and the grip strength and the load transfer characteristic of the cable body and resin or grouting material are improved.
(4) The grouting joint is arranged at the tail part of the cable body, and can be directly connected with a grouting pump for high-pressure grouting, so that the process is simple, and the grouting effect is good.
(5) The product realizes small aperture and large tonnage, the rope body structure meets the requirement of high-pressure grouting, and the anchor grouting integration is realized.
As shown in figure 1, the hollow grouting anchor rod 3 is arranged at the bottom corner of two sides, the specification of the hollow grouting anchor rod 3 is MZGK, 190-42/24, the model is M20-2470, and the interval is 700 multiplied by 700mm; the exposed length of the hollow grouting anchor rod 3 is 50mm, the size of a used tray is 150 x 10mm, and 1.429 sets of hollow grouting anchor rods 3 are used in each meter of roadway. The grouting anchor rod is fixed by adopting a special hole sealing.
The hollow grouting anchor rod 3 can be used for permanent support of a coal mine underground roadway and advanced support of the roadway. The grouting anchor rod performs pressure grouting on the anchor rod support through the hollow rod body, so that the aims of solidifying and crushing rock mass, isolating underground water body and preventing corrosion of the rod body are fulfilled. The grouting anchor rod has outstanding characteristics and obvious effect, can form supporting force together with rock mass rapidly, and controls the stability of surrounding rock.
The hollow grouting anchor rod 3 of the utility model is characterized in that:
(1) The anchor rod body is of a novel hollow structure, so that the dual-purpose function of one rod is realized, the supporting function can be realized, and grouting can be performed;
(2) Grouting slurry is full, and pressure grouting can be realized;
(3) The rod body is good in centering, the grouting material can wrap the whole length of the anchor rod body, the possibility of rust environment of the rod body is prevented, and the purpose of long-term support is achieved;
(4) The screw thread of the rod body adopts a screw extrusion cold processing technology, so that the physical and mechanical properties of the rod body are improved;
(5) The grouting liquid has large penetration range and strong anchoring force, and the grouting liquid is not returned and leaked by the action of the slurry stop plug;
(6) By adopting high-pressure grouting, the slurry can gradually permeate into various cracks and gaps in the rock stratum, the crushed rock body is anchored into a whole, and deep multi-azimuth whole anchoring is formed.
As shown in fig. 1, a water guide pipe 4 is installed at the lower portion of the double wall, and the water guide pipe 4 guides water to the drain.
The foregoing is merely illustrative of the present utility model, and the scope of the present utility model is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the scope of the present utility model, and therefore, the scope of the present utility model shall be defined by the scope of the appended claims.
Claims (10)
1. Roadway anchor annotates supporting construction, its characterized in that: the grouting device comprises a hollow grouting anchor rod, a hollow grouting anchor rope and a water guide pipe, wherein the hollow grouting anchor rope comprises a first hollow grouting anchor rope and a second hollow grouting anchor rope which are respectively arranged on a top plate and a side part of a roadway, the size of the first hollow grouting anchor rope is phi 22 multiplied by 4300, and the interval is 1400 multiplied by 1400mm; the second hollow grouting anchor cable has the size of phi 22 multiplied by 4300 and the interval row distance of 1400 multiplied by 1400mm; the hollow grouting anchor rod is arranged at the bottom corners of two sides, the model is M20-2470, and the interval is 700X 700mm; the water guide pipe is arranged at the lower part of the two walls, and the water guide pipe guides water to the drainage ditch.
2. The roadway anchor note support structure of claim 1, wherein: the specification of the hollow grouting anchor cable is SKZ22-1860-4300.
3. The roadway anchor note support structure of claim 1, wherein: and the end part of the hollow grouting anchor cable is connected with a resin end anchor.
4. The roadway anchor note support structure of claim 1, wherein: the hollow grouting anchor cable comprises a middle grouting core pipe and a plurality of high-strength spiral rib steel wires fixed on the periphery of the grouting core pipe.
5. The roadway anchor note support structure of claim 1, wherein: and the tail part of the hollow grouting anchor cable is connected with a grouting joint matched with a grouting pump.
6. The roadway anchor note support structure of claim 1, wherein: the anchoring length of the inner end of the hollow grouting anchor cable is 1000mm, the inner end of the hollow grouting anchor cable is sealed by a built-in hole packer, the exposure of the inner end of the hollow grouting anchor cable is 270-290mm, the used tray is a butterfly tray with the specification of 300 x 16mm, and 5.0 sets of hollow grouting anchor cables are used in each meter of roadway.
7. The roadway anchor note support structure of claim 1, wherein: the specification of the hollow grouting anchor rod is MZGK to 190 to 42/24.
8. The roadway anchor note support structure of claim 1, wherein: the exposed length of the hollow grouting anchor rod is 50mm, the size of a used tray is 150 x 10mm, and 1.429 sets of hollow grouting anchor rods are used for every meter of roadway.
9. The roadway anchor note support structure of claim 1, wherein: the first hollow grouting anchor cable comprises a grouting core pipe in the middle and a plurality of high-strength spiral rib steel wires fixed on the periphery of the grouting core pipe.
10. The roadway anchor note support structure of claim 1, wherein: the second hollow grouting anchor cable comprises a grouting core pipe in the middle and a plurality of high-strength spiral rib steel wires fixed on the periphery of the grouting core pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323558696.3U CN221400608U (en) | 2023-12-26 | 2023-12-26 | Tunnel anchor notes supporting construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323558696.3U CN221400608U (en) | 2023-12-26 | 2023-12-26 | Tunnel anchor notes supporting construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221400608U true CN221400608U (en) | 2024-07-23 |
Family
ID=91913987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323558696.3U Active CN221400608U (en) | 2023-12-26 | 2023-12-26 | Tunnel anchor notes supporting construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221400608U (en) |
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2023
- 2023-12-26 CN CN202323558696.3U patent/CN221400608U/en active Active
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