CN117108318A - Surrounding rock reinforcing grouting system for underground coal mine roadway - Google Patents
Surrounding rock reinforcing grouting system for underground coal mine roadway Download PDFInfo
- Publication number
- CN117108318A CN117108318A CN202311384532.5A CN202311384532A CN117108318A CN 117108318 A CN117108318 A CN 117108318A CN 202311384532 A CN202311384532 A CN 202311384532A CN 117108318 A CN117108318 A CN 117108318A
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- grouting
- surrounding rock
- frame
- coal mine
- fixed
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- 239000011435 rock Substances 0.000 title claims abstract description 45
- 239000003245 coal Substances 0.000 title claims abstract description 19
- 230000003014 reinforcing effect Effects 0.000 title claims description 11
- 238000005553 drilling Methods 0.000 claims abstract description 46
- 230000002787 reinforcement Effects 0.000 claims abstract description 23
- 238000007711 solidification Methods 0.000 claims abstract description 4
- 230000008023 solidification Effects 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims abstract 2
- 239000000463 material Substances 0.000 claims description 45
- 238000007569 slipcasting Methods 0.000 claims description 29
- 230000007246 mechanism Effects 0.000 claims description 18
- 238000007789 sealing Methods 0.000 claims description 14
- 230000000694 effects Effects 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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 DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
Abstract
The invention discloses a surrounding rock reinforcement grouting system for an underground tunnel of a coal mine, which belongs to the technical field of underground tunnel reinforcement, and comprises the following steps: the outer grouting machine frame is provided with a main feeding pipe, a grouting pump is arranged outside the outer grouting machine frame, the grouting pump is communicated with the stirring box through a feeding pipe, the main feeding pipe is communicated with the conveying end of the grouting pump, a guide frame is transversely fixed on the outer grouting machine frame, and a side grouting system is arranged on the guide frame in a sliding manner; the side grouting system can be obliquely drilled into surrounding rock of a coal mine tunnel and communicated with grouting drilling holes, so that the solidification strength of the structure is enhanced.
Description
Technical Field
The invention belongs to the technical field of underground roadway reinforcement, and particularly relates to a surrounding rock reinforcement grouting system for an underground roadway of a coal mine.
Background
Grouting reinforcement is commonly used for surrounding rock deformation with poor mechanical properties and large ground stress of surrounding rocks of a plurality of coal mine stoping roadways, for such surrounding rock, because cracks are high in development degree and are mutually communicated, grouting liquid flows far away through large cracks and even flows into nearby faults in the grouting process by adopting a grouting pipe in the prior art, so that economic loss is serious, and grouting effect cannot reach expected effect due to no grouting liquid pressing in small cracks; meanwhile, although the single formed grouting drilling hole can provide larger supporting force, the single formed grouting drilling hole is easy to break in middle faults due to vibration of a long-term mining area, and surrounding rock is still caused to protrude; accordingly, there is a need to provide a coal mine underworkings surrounding rock reinforcement grouting system that addresses the problems set forth in the background art above.
Disclosure of Invention
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a colliery underworkings surrounding rock consolidates slip casting system which includes: the outer grouting machine frame is connected with the outer frame steering arm at one end, and is driven by the outer frame steering arm to vertically locate at the roadway surrounding rock side wall, slidable mounting has grouting mechanism on the outer grouting machine frame, be equipped with main inlet pipe on the grouting mechanism, be provided with the grouting pump outward on the outer grouting machine frame, be linked together with the agitator tank through the feed pipe on the grouting pump, main inlet pipe is linked together with the delivery end of grouting pump, transversely be fixed with the guide frame on the outer grouting machine frame, the slip is provided with side grouting system on the guide frame.
Further, preferably, the grouting mechanism includes: the slip pedestal, the slip setting is in on the outer slip casting frame, be fixed with the connection cylinder seat on the slip pedestal, one side of connection cylinder seat transversely is provided with fixed axle bed, the rotation is provided with the slip casting drilling rod in the fixed axle bed, one side of fixed axle bed is provided with gear motor perpendicularly, gear motor pass through gear engagement with slip casting drilling rod meshing transmission, slip socket has been equipped with interior shutoff ring seat on the slip casting drilling rod, the one end of slip casting drilling rod with main inlet pipe is linked together.
Further, preferably, a collar frame is disposed in the connection cylinder seat, the fixed shaft seat is coaxially fixed on the collar frame, a plurality of pneumatic cylinders are circumferentially distributed on the connection cylinder seat, plungers are slidably disposed in the pneumatic cylinders, the plungers are connected with the collar frame through support rods, and air inlets and air outlets are disposed on the pneumatic cylinders.
Further, preferably, the plungers in the plurality of pneumatic cylinders are in sliding fit, so as to drive the grouting drill stem in a rotating working state to perform drilling and reaming, and form a grouting gap with a trapezoid cross section.
Further, preferably, the inner plugging ring seat comprises: the locating sleeve is sleeved and fixed outside the fixed shaft seat, a guide rod is arranged on the locating sleeve in a sliding manner, a sealing sleeve is sleeved on the grouting drill rod in a sliding manner, one end of the guide rod is fixed with the sealing sleeve, annular airflow cavities are formed in the sealing sleeve, ring frames are symmetrically fixed on the left side and the right side of the annular airflow cavities, an expanding and contracting bag is sleeved outside the ring frames, the annular airflow cavities are communicated with the expanding and contracting bag through side channels, and a diffuser is further arranged in the middle of the ring frames on the sealing sleeve.
Further, as the preference, a plurality of grouting holes have been seted up on the tip lateral wall of slip casting drilling rod, just concentric in the slip casting drilling rod is fixed with the negative pressure calandria, circumference is provided with a plurality of cross-under on the slip casting drilling rod on the negative pressure calandria drainage passageway, the external intercommunication of negative pressure calandria has the circulating pump for the slip casting drilling rod is in the slip casting material of slip casting drilling, the negative pressure calandria can carry out tip and pump, so that slip casting material forms circulation flow track in the drilling to solidify in tunnel surrounding rock drilling gap and form the waterproof layer, then the slip casting drilling rod realizes under the continuous slip casting work that slip casting material fills.
Further, preferably, the grouting pumps are two groups, and each grouting pump pumps different grouting materials into the grouting drilling holes correspondingly.
Further, preferably, the side grouting system includes: the driving seat is arranged on the guide frame in a sliding manner, a connecting frame is fixed in the driving seat, a side grouting device is rotationally arranged in the connecting frame, the side grouting device can gradually drill in under rotation, a telescopic adjusting rod is obliquely arranged on the connecting frame, and one end of the telescopic adjusting rod is connected with the side grouting device.
Further, preferably, the side grouting device in the side grouting system can be communicated with a drill hole formed by the grouting mechanism in the inclined drilling process, and grouting materials are synchronously injected, so that side reinforcing branches are formed by solidification.
Compared with the prior art, the invention has the beneficial effects that:
according to grouting reinforcement of surrounding rocks of coal mine roadways, a grouting mechanism is adopted to drill into the side walls of the surrounding rocks to form grouting drilling holes, grouting is carried out after reaming is carried out, and internal reinforcement is achieved, wherein in grouting, an inner plugging ring seat can be preferentially extended into the drilling holes, and after grouting materials are injected at low pressure, the inner plugging ring seat is gradually displaced and retreated out of the drilling holes, so that grouting materials are fully filled;
after the grouting material (with higher water resistance and fluidity) is fully filled, the grouting drill rod can be matched with the negative pressure calandria to enable the grouting material to circulate in the grouting drilling holes, the redundant grouting material is recovered, and then another grouting material (with better strength and stability) is re-injected into the grouting drilling holes to be filled, so that the filling effect is ensured;
the side grouting system also provided by the invention can be obliquely drilled into surrounding rock of the coal mine tunnel and communicated with the grouting drill hole, so that the solidification strength of the structure is enhanced.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic structural view of a grouting mechanism according to the present invention;
FIG. 3 is a schematic view of a connecting cylinder base according to the present invention;
FIG. 4 is a schematic view of the structure of the inner plugging ring seat in the present invention;
FIG. 5 is a schematic structural view of a grouting mechanism according to the present invention;
FIG. 6 is a schematic diagram of a side grouting system according to the present invention;
FIG. 7 is a schematic representation of the drilling of a grouting system according to the present invention;
FIG. 8 is a schematic view of slip casting according to the present invention;
in the figure: 1. an outer grouting machine frame; 11. a main feed pipe; 12. a grouting pump; 13. a guide frame; 2. a grouting mechanism; 21. a slide base; 22. grouting a drill rod; 23. a speed reducing motor; 24. grouting holes; 25. negative pressure calandria; 26. a drainage channel; 3. a side grouting system; 31. a driving seat; 32. a connecting frame; 33. a side grouting device; 34. a telescopic adjusting rod; 4. a connecting cylinder seat; 41. a collar frame; 42. a pneumatic cylinder; 43. a support rod; 5. an inner plugging ring seat; 51. a positioning sleeve; 52. a guide rod; 53. sealing the sleeve; 54. an annular airflow chamber; 55. a loop frame; 56. expanding and contracting the balloon; 6. a diffuser.
Detailed Description
Referring to fig. 1 to 8, in an embodiment of the present invention, a grouting system for reinforcing surrounding rock of a coal mine underground roadway includes: the outer grouting machine frame 1, its one end is connected with outer frame steering arm to drive vertical location in tunnel surrounding rock lateral wall department by outer frame steering arm, slidable mounting has grouting mechanism 2 on the outer grouting machine frame 1, be equipped with main inlet pipe 11 on the grouting mechanism 2, outer grouting machine frame 1 is provided with grouting pump 12 outward, be linked together with agitator tank (not shown in the figure) through the feed pipe on the grouting pump 12, main inlet pipe 11 is linked together with the delivery end of grouting pump 12, transversely be fixed with guide frame 13 on the outer grouting machine frame 1, slidable on the guide frame 13 is provided with side grouting system 3, and wherein side grouting system 3 can be in the tunnel surrounding rock lateral wall with grouting mechanism 2 synchronization drilling to carry out grouting reinforcement, accessible outer frame steering arm drive adjusts the position of arranging of side grouting system 3 (can distribute in the crack and the great position department of space grouting of surrounding rock), thereby forms the slurry reinforcement whole.
Referring to fig. 2, in this embodiment, the grouting mechanism 2 includes: the slip base 21, the slip sets up on the outer slip casting frame 1, be fixed with on the slip base 21 and connect the barrel holder 4, one side of connecting the barrel holder 4 transversely is provided with fixed axle bed, it is provided with slip casting drilling rod 22 to rotate in the fixed axle bed, one side of fixed axle bed is provided with gear motor 23 perpendicularly, gear motor 23 through gear engagement with slip casting drilling rod 22 meshing transmission, slip cup joint interior shutoff ring seat 5 on the slip casting drilling rod 22, slip casting drilling rod 22's one end with main inlet pipe 11 is linked together, realizes slip casting drilling rod drilling slip casting.
Referring to fig. 3, as a preferred embodiment, a collar frame 41 is disposed in the connection cylinder seat 4, the fixed shaft seat is coaxially fixed on the collar frame 41, a plurality of pneumatic cylinders 42 are circumferentially distributed on the connection cylinder seat 4, plungers are slidably disposed in the pneumatic cylinders 42, the plungers are connected with the collar frame 41 through a supporting rod 43, and each pneumatic cylinder 42 is provided with an air inlet and an air outlet.
In this embodiment, the plungers in the pneumatic cylinders 42 are in sliding fit, so as to drive the grouting drill stem 22 in a rotating working state to perform drilling and reaming, and form a grouting gap with a trapezoid cross section, that is, the pneumatic cylinders 42 can drive the corresponding plungers to slide and adjust under the action of air inlet and air outlet, so that the strut 43 pushes the shaft ring frame 41 to displace, wherein the plungers drive the grouting drill stem 22 to perform circumferential movement under sliding fit, so that a reamer setting effect is formed by taking the drilling end of the grouting drill stem 22 as a fulcrum, a grouting gap near the side wall of surrounding rock is increased, and grouting filling effect is improved.
Referring to fig. 4 and 5, in this embodiment, the inner plugging ring seat 5 includes: the positioning sleeve 51 is sleeved and fixed outside the fixed shaft seat, the guide rod 52 is arranged on the positioning sleeve 51 in a sliding manner, the sealing sleeve 53 is sleeved on the grouting drill rod 22 in a sliding manner, one end of the guide rod 52 is fixed with the sealing sleeve 53, an annular airflow cavity 54 is arranged on the sealing sleeve 53, annular frames 55 are symmetrically fixed on the left side and the right side of the annular airflow cavity 54, an expanding bag 56 is sleeved outside the annular frames 55, the annular airflow cavity 54 is communicated with the expanding bag 56 through a side channel, a diffuser 6 is further arranged in the middle of the annular frames 55 on the sealing sleeve 53, the diffuser 6 can expand outwards in a radial direction under the adjusting effect (the prior art is omitted), so that sealing diffusion can be carried out by matching with the two expanding bags 56, particularly in grouting, the inner plugging annular seat 5 slides gradually towards one side close to the connecting cylinder seat 4, grouting holes are continuously injected with grouting materials under low pressure by the grouting 22, and grouting materials are fully filled.
In this embodiment, a plurality of grouting holes 24 are formed in the side wall of the end portion of the grouting drill stem 22, a negative pressure drain pipe 25 is concentrically fixed in the grouting drill stem 22, a plurality of drainage channels 26 connected to the grouting drill stem 22 in a penetrating manner are circumferentially arranged on the negative pressure drain pipe 25, a circulating pump is communicated outside the negative pressure drain pipe 25, so that the grouting drill stem 22 can pump the end portion of the grouting drill stem 22 in grouting materials, the grouting materials can form a circulating flow track in a drill hole, a waterproof layer is formed in a surrounding rock drill hole gap of a roadway by solidifying, and then grouting materials are filled under continuous grouting operation of the grouting drill stem 22, in particular, after the grouting materials are initially filled in the grouting drill hole, the grouting drill stem 22 circularly discharges the grouting materials, and recovers the redundant grouting materials, and then the grouting materials with good strength and stability are conveyed for subsequent filling, and the method has the following advantages:
the following advantages are achieved by initially filling the grouting drill holes with a waterproof grouting material and then subsequently filling with a grouting material with better strength and stability compared with single grouting material filling:
first, water repellency is enhanced: the grouting drilling holes are initially filled with the waterproof grouting material to form a waterproof barrier, so that underground water or underground water flow is prevented from entering the roadway, and the flood risk is reduced;
second, intensity is promoted: the waterproof grouting material is used as a primary filling material, can fill grouting holes and penetrate into surrounding rock, so that the strength and stability of the surrounding rock are improved, and the grouting material with good strength and stability is used for subsequent filling, so that the strength of the surrounding rock is further enhanced, and the stability and crack resistance of the surrounding rock are improved;
thirdly, optimizing grouting effect: after the waterproof grouting material is used for preliminary filling, the redundant grouting material is circularly discharged and recycled through the grouting drill rod, so that the waste of the grouting material can be reduced, the grouting efficiency and economy are improved, the grouting effect is further optimized, and the surrounding rock reinforcement effect is improved;
fourth, process flexibility: two different grouting materials are adopted for filling, flexible adjustment can be carried out according to specific engineering requirements and surrounding rock characteristics, and proper grouting material combination can be selected according to the condition of a roadway and grouting effect so as to achieve the optimal surrounding rock reinforcing effect.
As a preferred embodiment, the grouting pumps 12 are two groups, and each grouting pump 12 pumps different grouting materials into the grouting drill holes, that is, can correspondingly convey grouting materials with higher water resistance and fluidity, and grouting materials with better strength and stability.
Referring to fig. 6, in this embodiment, the side grouting system 3 includes: the driving seat 31 is slidably arranged on the guide frame 13, a connecting frame 32 is fixed in the driving seat 31, a side grouting device 33 is rotationally arranged in the connecting frame 32, the side grouting device 33 can gradually drill in under rotation, a telescopic adjusting rod 34 is obliquely arranged on the connecting frame 32, one end of the telescopic adjusting rod 34 is connected with the side grouting device 33, and the side grouting device 33 can autonomously drive drilling.
Referring to fig. 7 and 8, in this embodiment, the side grouting device 33 in the side grouting system 3 is capable of communicating with a drill hole formed by drilling the grouting mechanism 2 during inclined drilling, and injecting grouting materials synchronously, so as to solidify and form side reinforcing small branches, on one hand, the compactness of surrounding rock at the grouting drill hole can be enhanced, the overall stability and strength of the surrounding rock are improved, the reinforcing comprehensiveness is increased, and on the other hand, a continuous supporting system can be formed, and the connectivity is beneficial to transmitting and dispersing stress of the surrounding rock, and the overall stability of the surrounding rock is improved; and proper lateral reinforcement positions and grouting parameters are selected to realize flexible control of reinforcement effects, and targeted reinforcement can be performed according to surrounding rock conditions of different areas, so that the controllability of the reinforcement effects is improved.
Specifically, the grouting mechanism 2 on the outer grouting machine frame adopts the grouting drill rod 22 to drill in a rotating way to form grouting drilling holes, and simultaneously, the side grouting device 33 in the side grouting system 3 rotates to drill in a synchronous inclined way, at the moment, the displacement of the inner plugging ring seat 5 is regulated to the end part of the grouting drill rod 22, the grouting drill rod 22 performs low-pressure grouting, and then the inner plugging ring seat 5 is regulated in a stepwise displacement way, so that the grouting material is fully filled in a flowing way; after the grouting material is initially filled, the grouting drill pipe 22 circularly discharges the grouting drill pipe in the grouting drill hole and recovers the redundant grouting material, at the moment, the grouting material can form a waterproof layer in the grouting drill hole, and the rear side grouting system 3 is matched with the grouting drill pipe 22 for simultaneous grouting filling, so that a grouting reinforcement whole is formed, and the reinforcement effect is improved.
The foregoing description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical solution of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (9)
1. Underground roadway surrounding rock reinforcing grouting system for coal mine, which is characterized by comprising: the grouting device comprises an outer grouting machine frame (1), wherein one end of the outer grouting machine frame is connected with an outer frame steering arm, the outer frame steering arm drives the vertical positioning at the side wall of a roadway surrounding rock, a grouting mechanism (2) is slidably arranged on the outer grouting machine frame (1), a main feeding pipe (11) is arranged on the grouting mechanism (2), a grouting pump (12) is arranged outside the outer grouting machine frame (1), the grouting pump (12) is communicated with a stirring box through a feeding pipe, the main feeding pipe (11) is communicated with the conveying end of the grouting pump (12), a guide frame (13) is transversely fixed on the outer grouting machine frame (1), and a side grouting system (3) is slidably arranged on the guide frame (13).
2. The coal mine underground roadway surrounding rock reinforcement grouting system as recited in claim 1, wherein the grouting mechanism (2) comprises: slide base (21), the slip sets up on slip casting frame (1), be fixed with on slide base (21) and connect cartridge seat (4), one side of connecting cartridge seat (4) transversely is provided with fixed axle bed, the rotation is provided with slip casting drilling rod (22) in the fixed axle bed, one side of fixed axle bed is provided with gear motor (23) perpendicularly, gear motor (23) through gear engagement effect with slip casting drilling rod (22) meshing transmission, slip socket has been equipped with interior shutoff ring seat (5) on slip casting drilling rod (22), the one end of slip casting drilling rod (22) with main inlet pipe (11) are linked together.
3. The grouting system for reinforcing surrounding rock of underground coal mine roadway of claim 2, wherein a collar frame (41) is arranged in the connecting cylinder seat (4), the fixed shaft seat is coaxially fixed on the collar frame (41), a plurality of pneumatic cylinders (42) are circumferentially distributed on the connecting cylinder seat (4), plungers are slidably arranged in the pneumatic cylinders (42), the plungers are connected with the collar frame (41) through supporting rods (43), and air inlets and air outlets are formed in the pneumatic cylinders (42).
4. A coal mine underground roadway surrounding rock reinforcing grouting system as claimed in claim 3, wherein the plungers in the plurality of pneumatic cylinders (42) can drive the grouting drill pipes (22) in a rotary working state to perform drilling and reaming under sliding fit, and form grouting gaps with trapezoid cross sections.
5. The underground coal mine roadway surrounding rock reinforcement grouting system as recited in claim 2, wherein said inner plugging ring seat (5) comprises: the positioning sleeve (51) is sleeved and fixed outside the fixed shaft seat, a guide rod (52) is arranged on the positioning sleeve (51) in a sliding manner, a sealing sleeve (53) is sleeved on the grouting drill rod (22) in a sliding manner, one end of the guide rod (52) is fixed with the sealing sleeve (53), an annular airflow cavity (54) is arranged on the sealing sleeve (53), ring frames (55) are symmetrically fixed on the left side and the right side of the annular airflow cavity (54), an expanding and contracting bag (56) is sleeved outside the ring frames (55), the annular airflow cavity (54) is communicated with the expanding and contracting bag (56) through a side channel, and a diffuser (6) is further arranged in the middle of the ring frames (55) on the sealing sleeve (53).
6. The underground coal mine roadway surrounding rock reinforcing grouting system according to claim 2, wherein a plurality of grouting holes (24) are formed in the side wall of the end portion of the grouting drill rod (22), negative-pressure drain pipes (25) are concentrically fixed in the grouting drill rod (22), a plurality of drainage channels (26) penetrating through the grouting drill rod (22) are circumferentially arranged on the negative-pressure drain pipes (25), a circulating pump is communicated with the outside of the negative-pressure drain pipes (25), so that the grouting drill rod (22) can perform end portion pumping in grouting materials for grouting drilling holes, circulating flow tracks are formed in the grouting materials, a waterproof layer is formed in the drilling gaps of the roadway surrounding rock, and grouting materials are filled under continuous grouting operation of the grouting drill rod (22).
7. The underground roadway surrounding rock reinforcement grouting system for the coal mine as recited in claim 6, wherein the grouting pumps (12) are arranged in two groups, and each grouting pump (12) pumps different grouting materials into grouting holes correspondingly.
8. The coal mine underground roadway surrounding rock reinforcement grouting system as recited in claim 1, wherein said side grouting system (3) comprises: the driving seat (31) is arranged on the guide frame (13) in a sliding manner, a connecting frame (32) is fixed in the driving seat (31), a side grouting device (33) is rotationally arranged in the connecting frame (32), the side grouting device (33) can gradually drill in under rotation, a telescopic adjusting rod (34) is obliquely arranged on the connecting frame (32), and one end of the telescopic adjusting rod (34) is connected with the side grouting device (33).
9. The underground roadway surrounding rock reinforcement grouting system for the coal mine as claimed in claim 8, wherein the side grouting device (33) in the side grouting system (3) can be communicated with a drill hole formed by the grouting mechanism (2) in the inclined drilling process, and grouting materials are synchronously injected, so that side reinforcement branches are formed by solidification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311384532.5A CN117108318B (en) | 2023-10-25 | 2023-10-25 | Surrounding rock reinforcing grouting system for underground coal mine roadway |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311384532.5A CN117108318B (en) | 2023-10-25 | 2023-10-25 | Surrounding rock reinforcing grouting system for underground coal mine roadway |
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| Publication Number | Publication Date |
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| CN117108318A true CN117108318A (en) | 2023-11-24 |
| CN117108318B CN117108318B (en) | 2024-01-02 |
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| CN202311384532.5A Active CN117108318B (en) | 2023-10-25 | 2023-10-25 | Surrounding rock reinforcing grouting system for underground coal mine roadway |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117287232A (en) * | 2023-11-24 | 2023-12-26 | 北京科技大学 | Quick grouting sealing device for coal mine goaf fire-extinguishing roadway |
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| CN117287232B (en) * | 2023-11-24 | 2024-01-30 | 北京科技大学 | Quick grouting sealing device for coal mine goaf fire-extinguishing roadway |
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| CN117108318B (en) | 2024-01-02 |
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