CN113107523A - Gap-included supporting method and grouting supporting process for rock burst supporting - Google Patents
Gap-included supporting method and grouting supporting process for rock burst supporting Download PDFInfo
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- CN113107523A CN113107523A CN202110364808.8A CN202110364808A CN113107523A CN 113107523 A CN113107523 A CN 113107523A CN 202110364808 A CN202110364808 A CN 202110364808A CN 113107523 A CN113107523 A CN 113107523A
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- 238000000034 method Methods 0.000 title claims abstract description 54
- 239000011435 rock Substances 0.000 title claims abstract description 35
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 159
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 8
- 239000002344 surface layer Substances 0.000 claims description 29
- 239000002002 slurry Substances 0.000 claims description 24
- 239000010410 layer Substances 0.000 claims description 15
- 239000011440 grout Substances 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 7
- 238000009941 weaving Methods 0.000 claims description 6
- 239000003245 coal Substances 0.000 description 6
- 230000000712 assembly Effects 0.000 description 5
- 238000000429 assembly Methods 0.000 description 5
- 230000002787 reinforcement Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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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
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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
- E21D11/04—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
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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
- E21D11/04—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
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
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- Mining & Mineral Resources (AREA)
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- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention belongs to the technical field of support, and particularly relates to a clearance support method and a grouting support process for rock burst support, which comprise a roadway, wherein the roadway comprises a roadway top and a roadway side, a reinforcing assembly and an anchor rod cable net assembly are arranged in the roadway, and reinforcing grooves are symmetrically formed in the bottom end of the side surface of the roadway side; the reinforcing component comprises a reinforcing steel rope, a reinforcing mesh, a reinforcing anchor rod, a reinforcing sheet and a reinforcing nut; the anchor rod cable net component comprises an anchor cable steel rope, anchor cable net holes, an anchor cable anchor rod, an anchor cable sheet and an anchor cable nut; consolidate inside cavity of being of stock, set up the internal thread on the cavity intracavity wall, cavity intracavity internally mounted has a hollow interior pole, and the external screw thread has been seted up in the cooperation on the pole lateral wall in the cavity, and the rotation groove has been seted up on the pole top in the cavity, and it has the rotation piece to rotate inslot portion grafting, struts when drawing together the clearance, can expand the clearance to the tunnel depths when increasing the security.
Description
Technical Field
The invention belongs to the technical field of support for coal mines, and particularly relates to a clearance support method and a grouting support process for rock burst support, which are designed for rock burst roadways.
Background
Coal mines are reasonable spaces excavated by humans when excavating geological formations rich in coal and generally include roadways, wells, and mining surfaces, among others. Coal mine roadways are various passages drilled between the surface and the ore body for carrying ore, ventilation, drainage, pedestrian and various necessary preparation passages for mining ore for metallurgical equipment. Along with the development of the technology, the coal mine roadway support goes through the processes of wood support, masonry support and steel frame shed support to anchor rod net cable support, the anchor rod net cable support is used as a novel support means, belongs to an active support mode and can prevent the deformation of the side wall of the roadway, anchor rod grouting is an important part of the support, and slurry capable of cementing broken rocks is injected into surrounding rock cracks to reinforce the surrounding rock body, so that the effect that the cracks of the rocks are excited in practice is better, the cementing strength of the surrounding rocks is higher, the pressure relief function is also provided, the transmission of stress inside the rock body needs a certain path, the cracks in the rock body are just the path through which the stress flows, and generally, the more the corresponding cracks are rich, and the more the stress is lost. At present, before the anchor rod net cable of a roadway is supported, corresponding measures need to be taken to increase the weak surface in the surrounding rock so as to improve the voidage of the surrounding rock, so that the release of the stress of the original rock and the smoothness of the flowing line of grouting slurry are facilitated, the internal stress of the surrounding rock is released, the cementing range of the surrounding rock after grouting is improved, and the purpose of stabilizing the surrounding rock is achieved.
Disclosure of Invention
The existing gap expansion is carried out before supporting, the side wall of a roadway is in a risk of falling off in the gap expansion process, the existing gap expansion method is that the wall of the roadway is beaten by an air pick, and the gap is expanded by using a vibration method, but the effect is poor, the gap expansion range is small, the gap expansion method can only penetrate into a shallow part in the wall of the roadway, the desired effect cannot be achieved during grouting, and a thick layer cannot be formed. The invention provides a gap-covering supporting method and a grouting supporting process for rock burst supporting.
The invention provides the following technical scheme:
a clearance supporting method and a grouting supporting process for rock burst supporting comprise a roadway, wherein the roadway comprises a roadway top and roadway sides, a reinforcing assembly and anchor rod cable net assemblies are arranged in the roadway, and reinforcing grooves are symmetrically formed in the bottom ends of the side faces of the two groups of roadway sides; the reinforcing assembly comprises reinforcing steel ropes, reinforcing mesh holes, a reinforcing anchor rod, reinforcing sheets and reinforcing nuts, the reinforcing mesh holes are formed by weaving a plurality of groups of reinforcing steel ropes, the reinforcing anchor rod penetrates through the reinforcing mesh holes to be arranged on the side wall of the reinforcing groove, the reinforcing sheets are sleeved on the side wall of the reinforcing anchor rod, and the reinforcing nuts are installed on the side wall of the reinforcing anchor rod in a threaded manner; the anchor rod cable net component comprises anchor cable steel ropes, anchor cable net holes, an anchor cable anchor rod, anchor cable sheets and anchor cable nuts, wherein the anchor cable net holes are formed by weaving a plurality of groups of anchor cable steel ropes; the reinforced anchor rod is characterized in that a hollow cavity is formed inside the reinforced anchor rod, an internal thread is formed in the inner wall of the hollow cavity, grout outlet grooves are formed in the inner wall of the hollow cavity at intervals of internal thread intervals, a hollow inner rod is mounted inside the hollow cavity, an external thread is formed in the side wall of the hollow inner rod in a matched mode, grout outlet grooves are formed in the side wall of the hollow inner rod at intervals of the external thread, a hollow drill bit is communicated with the bottom end of the hollow inner rod, a rotating groove is formed in the top end of the hollow inner rod, a rotating part is inserted into the rotating groove and comprises a rotating rod and a rotating disc, the rotating disc is fixed to the top end of the.
The vertical section of the reinforcing groove is a right trapezoid, and the length of the bottom side of the right trapezoid is larger than the length of the reinforcing anchor rod.
The length of the reinforcing sheet is greater than that of the reinforcing meshes, and the width of the reinforcing sheet is greater than that of the reinforcing meshes.
The size of the mesh holes of the anchor cable is smaller than that of the reinforcing mesh holes, the density of the reinforcing mesh holes is larger than that of the mesh holes of the anchor cable, and the anchor cable anchor rod comprises a surface anchor rod with small depth and a deep anchor rod with large depth.
The length of the anchor cable pieces is larger than that of the anchor cable meshes, and the width of the anchor cable pieces is larger than that of the anchor cable meshes.
The length of hollow inner rod equals the length of reinforcing anchor rod, the external screw thread sets up and length is less than the length of hollow inner rod from hollow inner rod bottom.
The through holes are symmetrically arranged in two groups, and the length of the extension rod is equal to the vertical distance from the bottom end of the vertical sliding groove to the top end of the vertical plate.
Wherein, rotating groove and drive groove are for the cross recess and total six group's circumference evenly set up on hollow interior pole top, the dwang be with rotating groove complex cross bar.
The clearance supporting method and the grouting supporting process for rock burst supporting comprise the following steps:
s1, pre-reinforcing: reinforcing grooves are arranged outside two sides of a roadway bottom corner, reinforcing anchor rods are arranged on the side walls of the junctions of the reinforcing grooves and the roadway sides, a reinforcing component is installed, after the reinforcing component and the reinforcing pieces are fixed, the outer side surfaces of the reinforcing component and the reinforcing pieces are flush through guniting, grouting is carried out through the reinforcing anchor rods after the guniting is finished, and pre-reinforcing is carried out on the bottom of the roadway through the reinforcing component;
s2, anchor rod cable net support: laying anchor cables and anchor rods on the roadway top and the roadway side, installing anchor rod cable net components, after fixing, spraying slurry to cover the anchor rod cable net components and the outer side surfaces of the anchor cable pieces to be flush, and performing primary supporting on the anchor cables and the anchor rods which are divided into surface anchor rods and deep anchor rods;
s3, surface layer gap expansion: carrying out acoustic vibration clearance expansion on a shallow position on the surface layer of the roadway by using acoustic waves through an acoustic wave generator;
s4, surface layer grouting: after the surface layer is subjected to clearance expansion, grouting the shallow position of the side wall of the roadway by using the surface layer anchor rod in the S;
s5, deep layer gapping: after the slurry strength in the surface layer is improved, the sound wave generator is utilized again, parameters are adjusted, and sound waves are utilized for carrying out sound wave vibration gap expansion at the deep position of the roadway;
s6, deep grouting: after the deep layer is subjected to clearance expansion, grouting at the deep layer position of the roadway by using the deep anchor rod in the S;
s7, concrete filling: and filling concrete into the reinforcing groove to enable the reinforcing groove to be flush with the bottom end of the roadway.
The clearance supporting method and the grouting supporting process for rock burst supporting comprise the following steps:
step one, reinforcing deep grouting of an anchor rod: when the reinforced anchor rod is used for grouting, the rotating disc is driven to rotate by utilizing the matching of the external cross joint and the driving groove, so that the rotating rod drives the hollow inner rod to rotate, the hollow inner rod is further pushed out from the reinforced anchor rod, the hollow inner rod is deeply drilled under the matching of the hollow drill bit, and deep grouting is carried out through the slurry leakage groove;
step two, reinforcing the surface layer of the anchor rod and grouting: and after the strength of the slurry of the deep grouting is improved, performing surface layer grouting by using a slurry outlet groove on the reinforced anchor rod.
Compared with the prior art, the invention has the beneficial effects that: by arranging the reinforcing component and the anchor rod cable net component, utilizing the matching of the reinforcing component and the anchor rod cable net component, arranging reinforcing grooves outside the two sides of the bottom corner of the roadway, arranging reinforcing anchor rods on the side wall of the junction of the reinforcing grooves and the roadway sides, installing the reinforcing component, after fixing, spraying slurry to cover the reinforcing component and the outer side surfaces of the reinforcing pieces to be parallel and level, grouting through the reinforcing anchor rods after the spraying is finished, pre-reinforcing the bottom of the roadway through the reinforcing component, in the grouting process, firstly performing deep grouting, performing surface layer grouting, arranging anchor cable anchor rods on the roadway top and the roadway sides, installing the anchor rod cable net component, covering the anchor rod cable net component and the outer side surfaces of the anchor cable pieces by spraying slurry after fixing to be parallel and level, dividing the anchor cable anchor rods into a surface layer anchor rod and a deep layer anchor rod, performing primary support, utilizing sound waves to perform sound wave vibration gap expansion on the, utilize the top layer stock to carry out the slip casting of the shallower position of tunnel lateral wall, after the promotion of surperficial intraformational thick liquid intensity, reuse sound wave generator, the adjustment parameter, utilize the sound wave to carry out the sound wave vibrations of the deep position of tunnel and expand the clearance, after deep layer expands the clearance, utilize the deep stock to carry out the slip casting of the deep position of tunnel, carry out concrete filling to consolidating the slot at last, make its and tunnel bottom parallel and level, the realization is to the reinforcement in tunnel, strut when drawing together the clearance, the two cooperation construction, can expand the clearance to tunnel depths when increasing the security.
The parts not involved in the apparatus/method are the same as or can be implemented using existing technology.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a reinforcement assembly according to the present invention;
FIG. 3 is a schematic view of the anchor rod cable net assembly of the present invention;
FIG. 4 is a schematic view of a reinforcement bolt structure according to the present invention;
FIG. 5 is a cross-sectional view of a reinforcement bolt of the present invention;
FIG. 6 is a schematic view of the hollow core anchor rod construction of the present invention;
FIG. 7 is a schematic view of a rotating member according to the present invention.
In the figure: 1. performing roadway jacking; 2. lane walls; 3. a reinforcement assembly; 300. reinforcing the steel rope; 301. reinforcing meshes; 302. reinforcing the anchor rod; 303. a reinforcing sheet; 304. reinforcing the nut; 4. an anchor rod cable net assembly; 400. an anchor cable steel rope; 401. anchor cable mesh; 402. anchor cable and anchor rod; 403. anchor cable pieces; 404. an anchor cable nut; 5. reinforcing the groove; 6. an internal thread; 7. a slurry outlet groove; 8. a hollow inner rod; 9. an external thread; 10. a hollow drill bit; 11. a rotating groove; 12. rotating the rod; 13. rotating the disc; 14. the groove is driven.
Detailed Description
Referring to fig. 1-7, the present invention provides the following technical solutions:
a clearance supporting method and a grouting supporting process for supporting rock burst comprise a roadway, wherein the roadway comprises a roadway top (1) and roadway sides (2), a reinforcing assembly (3) and anchor rod cable net assemblies (4) are arranged in the roadway, and reinforcing grooves (5) are symmetrically formed in the bottom ends of the side faces of the two groups of the roadway sides (2); the reinforcing assembly (3) comprises reinforcing steel ropes (300), reinforcing mesh holes (301), reinforcing anchor rods (302), reinforcing plates (303) and reinforcing nuts (304), the reinforcing mesh holes (301) are formed by weaving a plurality of groups of reinforcing steel ropes (300), the reinforcing anchor rods (302) penetrate through the reinforcing mesh holes (301) and are arranged on the side walls of the reinforcing grooves (5), the reinforcing plates (303) are sleeved on the side walls of the reinforcing anchor rods (302), and the reinforcing nuts (304) are installed on the side walls of the reinforcing anchor rods (302) in a threaded mode; the anchor rod cable net component (4) comprises anchor cable steel ropes (400), anchor cable mesh holes (401), an anchor cable anchor rod (402), anchor cable pieces (403) and anchor cable nuts (404), wherein the anchor cable mesh holes (401) are formed by weaving a plurality of groups of anchor cable steel ropes (400), the anchor cable anchor rod (402) penetrates through the anchor cable mesh holes (401) to be arranged on the inner side of a roadway, the anchor cable pieces (403) are sleeved on the side wall of the anchor cable anchor rod (402), and the anchor cable nuts (404) are installed on the side wall of the anchor cable anchor rod (402) in a threaded mode; the interior of the reinforcing anchor rod (302) is a hollow cavity, the inner wall of the hollow cavity is provided with an internal thread (6), slurry outlet grooves (7) are arranged on the inner wall of the hollow cavity at equal intervals at the interval of the internal thread (6), a hollow inner rod (8) is arranged in the hollow cavity, external threads (9) are matched and arranged on the side wall of the hollow inner rod (8), slurry leakage grooves are arranged on the side wall of the hollow inner rod (8) at intervals of the external threads (9), the bottom end of the hollow inner rod (8) is communicated with a hollow drill bit (10), the top end of the hollow inner rod (8) is provided with a rotating groove (11), a rotating part is inserted in the rotating groove (11) and comprises a rotating rod (12) and a rotating disc (13), the rotary disc (13) is fixed at the top end of the rotary rod (12), and a driving groove (14) is formed in the center of the top end of the rotary disc (13).
The vertical section of the reinforcing groove (5) is in a right trapezoid shape, the length of the bottom side of the right trapezoid is larger than that of the reinforcing anchor rod (302), the side face, close to the roadway side (2), of the reinforcing groove (5) and the side face of the roadway side (2) are located on the same vertical face, and therefore the arrangement of the reinforcing assemblies (3) is facilitated.
The length of the reinforcing sheet (303) is larger than that of the reinforcing mesh (301), the width of the reinforcing sheet (303) is larger than that of the reinforcing mesh (301), and the reinforcing sheet (303) is ensured to compress the reinforcing steel ropes (300) when the reinforcing anchor rod (302) is fixed through the reinforcing sheet (303) and the reinforcing nut (304).
The size of anchor rope mesh (401) is less than the size of consolidating mesh (301), the intensive degree of consolidating mesh (301) is greater than anchor rope mesh (401), anchor rope stock (402) are including the less superficial stock of degree of depth and the great deep stock of degree of depth, and intensive the setting consolidate mesh (301) when consolidating reinforcing slot (5), improved reinforced intensity.
The length of the anchor cable piece (403) is larger than that of the anchor cable mesh hole (401), the width of the anchor cable piece (403) is larger than that of the anchor cable mesh hole (401), and the anchor cable piece (403) is enabled to compress the anchor cable steel rope (400) when the anchor cable bolt (402) is reinforced through the anchor cable piece (403) and the anchor cable nut (404).
The length of pole (8) in the hollow equals the length of consolidating stock (302), external screw thread (9) set up and length is less than the length of pole (8) in the hollow from pole (8) bottom in the hollow, when utilizing screw-thread fit drive pole (8) in the hollow of external screw thread (9) and internal thread (6) to stretch out and consolidate stock (302), avoid pole (8) in the hollow and consolidate stock (302) complete separation.
The diameter of the bottom end of the hollow drill bit (10) is smaller than the diameter of the hollow inner rod (8), the diameter of the top end of the hollow drill bit (10) is equal to the diameter of the hollow inner rod (8), and when the hollow drill bit (10) rotates to work, the bottom end of the hollow drill bit does not contact with the hollow cavity inside the reinforced anchor rod (302), so that the hollow drill bit can stretch out of the reinforced anchor rod (302) conveniently.
Rotate groove (11) and drive groove (14) and be for cross recess and total six even settings of circumference in hollow interior pole (8) top, dwang (12) for with rotate groove (11) complex cross bar, utilize the cooperation of outside cross joint and drive groove (14), drive rolling disc (13) and rotate for dwang (12) drive hollow interior pole (8) rotate, and then release hollow interior pole (8) from consolidating in stock (302).
A clearance supporting method and a grouting supporting process for rock burst supporting comprise the following steps:
s1, pre-reinforcing: reinforcing grooves (5) are arranged outside two sides of a roadway bottom corner, reinforcing anchor rods (302) are arranged on the side wall of the junction of the reinforcing grooves (5) and the roadway side (2), the reinforcing component (3) is installed, after the reinforcing component is fixed, guniting covers the reinforcing component (3) and the outer side surface of the reinforcing sheet (303) is parallel and level, after the guniting is finished, grouting is carried out through the reinforcing anchor rods (302), and the bottom of the roadway is pre-reinforced through the reinforcing component (3);
s2, anchor rod cable net support: laying anchor bolts (402) on the roadway roof (1) and the roadway side (2), installing anchor bolt cable net assemblies (4), after fixing, spraying slurry to cover the anchor bolt cable net assemblies (4) and the outer side surfaces of anchor rope sheets (403) to be parallel and level, dividing the anchor bolt anchor rods (402) into surface anchor rods and deep anchor rods, and performing primary support;
s3, surface layer gap expansion: carrying out acoustic vibration clearance expansion on a shallow position on the surface layer of the roadway by using acoustic waves through an acoustic wave generator;
s4, surface layer grouting: after the surface layer is subjected to clearance expansion, grouting the shallow position of the side wall of the roadway by using the surface layer anchor rod in S2;
s5, deep layer gapping: after the slurry strength in the surface layer is improved, the sound wave generator is utilized again, parameters are adjusted, and sound waves are utilized for carrying out sound wave vibration gap expansion at the deep position of the roadway;
s6, deep grouting: after the deep layer is subjected to clearance expansion, grouting at the deep layer position of the roadway by using the deep anchor rod in S2;
s7, concrete filling: and filling concrete into the reinforcing groove (5) to enable the reinforcing groove to be flush with the bottom end of the roadway.
A clearance supporting method and a grouting supporting process for rock burst supporting comprise the following steps:
step one, deep grouting of a reinforcing anchor rod (302): when the reinforcing anchor rod (302) is used for grouting, the rotating disc (13) is driven to rotate by utilizing the matching of the external cross joint and the driving groove (14), so that the rotating rod (12) drives the hollow inner rod (8) to rotate, the hollow inner rod (8) is further pushed out from the reinforcing anchor rod (302), the hollow inner rod (8) is deeply drilled under the matching of the hollow drill bit (10), and deep grouting is carried out through the slurry leakage groove;
secondly, grouting the surface layer of the reinforced anchor rod (302): and after the strength of the deep grouting slurry is improved, surface grouting is carried out by utilizing a slurry outlet groove (7) on the reinforcing anchor rod (302).
The working principle and the using process of the invention are as follows:
when the support is carried out in a coal mine roadway, firstly, reinforcing grooves (5) are arranged outside two sides of a roadway bottom corner, reinforcing anchor rods (302) are arranged on the side wall of the boundary of the reinforcing grooves (5) and a roadway side wall (2), the reinforcing component (3) is installed, after the support is fixed, guniting covers the reinforcing component (3) and the outer side surface of a reinforcing sheet (303) to be parallel and level, after the guniting is finished, the grouting is carried out through the reinforcing anchor rods (302), the roadway bottom is pre-reinforced through the reinforcing component (3), in the grouting process through the reinforcing anchor rods (302), a rotating disc (13) is driven to rotate by utilizing the matching of an external cross joint and a driving groove (14), so that a rotating rod (12) drives a hollow inner rod (8) to rotate, the hollow inner rod (8) is further pushed out from the reinforcing anchor rods (302), and the hollow inner rod (8) is deeply drilled under the matching of a hollow drill, deep grouting is firstly carried out through the grout leakage groove, and surface grouting is carried out by utilizing the grout outlet groove (7) on the reinforcing anchor rod (302) after the strength of grout of the deep grouting is improved; secondly, laying anchor cables and anchor rods (402) on the roadway roof (1) and the roadway side (2), installing anchor rod cable net components (4), after fixing, spraying slurry to cover the outer side surfaces of the anchor rod cable net components (4) and the anchor cable sheets (403) to be parallel and level, and dividing the anchor cables and anchor rods (402) into surface anchor rods and deep anchor rods for primary support; then, through a sound wave generator, sound wave vibration gap expansion of a shallow position of the roadway surface layer is carried out by utilizing sound waves, after the gap expansion of the surface layer, grouting of a shallow position of the roadway side wall is carried out by utilizing a surface layer anchor rod, after the strength of slurry in the surface layer is improved, the sound wave generator is utilized again, parameters are adjusted, sound wave vibration gap expansion of a deep position of the roadway is carried out by utilizing the sound waves, after the gap expansion of the deep layer, grouting of a deep position of the roadway is carried out by utilizing a deep layer anchor rod, and finally concrete filling is carried out on a reinforcing groove (5) to enable the reinforcing groove to be flush with the bottom end of the roadway, so.
Claims (10)
1. A clearance supporting method and a grouting supporting process aiming at rock burst supporting are characterized in that: the device comprises a roadway, wherein the roadway comprises a roadway top and roadway sides, a reinforcing assembly and an anchor rod cable net assembly are arranged in the roadway, and reinforcing grooves are symmetrically formed in the bottom ends of the side surfaces of the two groups of the roadway sides; the reinforcing assembly comprises reinforcing steel ropes, reinforcing mesh holes, a reinforcing anchor rod, reinforcing sheets and reinforcing nuts, the reinforcing mesh holes are formed by weaving a plurality of groups of reinforcing steel ropes, the reinforcing anchor rod penetrates through the reinforcing mesh holes to be arranged on the side wall of the reinforcing groove, the reinforcing sheets are sleeved on the side wall of the reinforcing anchor rod, and the reinforcing nuts are installed on the side wall of the reinforcing anchor rod in a threaded manner; the anchor rod cable net component comprises anchor cable steel ropes, anchor cable net holes, an anchor cable anchor rod, anchor cable sheets and anchor cable nuts, wherein the anchor cable net holes are formed by weaving a plurality of groups of anchor cable steel ropes; the reinforced anchor rod is characterized in that a hollow cavity is formed inside the reinforced anchor rod, an internal thread is formed in the inner wall of the hollow cavity, grout outlet grooves are formed in the inner wall of the hollow cavity at intervals of internal thread intervals, a hollow inner rod is mounted inside the hollow cavity, an external thread is formed in the side wall of the hollow inner rod in a matched mode, grout outlet grooves are formed in the side wall of the hollow inner rod at intervals of the external thread, a hollow drill bit is communicated with the bottom end of the hollow inner rod, a rotating groove is formed in the top end of the hollow inner rod, a rotating part is inserted into the rotating groove and comprises a rotating rod and a rotating disc, the rotating disc is fixed to the top end of the.
2. The clearance supporting method and the grouting supporting process for rock burst supporting according to claim 1, characterized in that: the vertical section of the reinforcing groove is in a right trapezoid shape, and the length of the bottom side of the right trapezoid is larger than the length of the reinforcing anchor rod.
3. The clearance supporting method and the grouting supporting process for rock burst supporting according to claim 1, characterized in that: the length of the reinforcing sheet is greater than that of the reinforcing meshes, and the width of the reinforcing sheet is greater than that of the reinforcing meshes.
4. The clearance supporting method and the grouting supporting process for rock burst supporting according to claim 1, characterized in that: the size of anchor rope mesh is less than the size of consolidating the mesh, the intensive degree of consolidating the mesh is greater than the anchor rope mesh, the anchor rope stock is including the less superficial stock of the degree of depth and the great deep stock of the degree of depth.
5. The clearance supporting method and the grouting supporting process for rock burst supporting according to claim 1, characterized in that: the length of the anchor cable piece is larger than that of the anchor cable mesh, and the width of the anchor cable piece is larger than that of the anchor cable mesh.
6. The clearance supporting method and the grouting supporting process for rock burst supporting according to claim 1, characterized in that: the length of hollow inner pole equals the length of the reinforced anchor rod, the external screw thread sets up from hollow inner pole bottom and length is less than the length of hollow inner pole.
7. The clearance supporting method and the grouting supporting process for rock burst supporting according to claim 1, characterized in that: the through holes are two groups and are symmetrically arranged, and the length of the extension rod is equal to the vertical distance from the bottom end of the vertical sliding groove to the top end of the vertical plate.
8. The clearance supporting method and the grouting supporting process for rock burst supporting according to claim 1, characterized in that: the rotating groove and the driving groove are cross grooves and six groups of total circumferences which are evenly arranged at the top end of the hollow inner rod, and the rotating rod is a cross rod matched with the rotating groove.
9. The gap-closing supporting method and grouting supporting process for rock burst supporting according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:
s1, pre-reinforcing: reinforcing grooves are arranged outside two sides of a roadway bottom corner, reinforcing anchor rods are arranged on the side walls of the junctions of the reinforcing grooves and the roadway sides, a reinforcing component is installed, after the reinforcing component and the reinforcing pieces are fixed, the outer side surfaces of the reinforcing component and the reinforcing pieces are flush through guniting, grouting is carried out through the reinforcing anchor rods after the guniting is finished, and pre-reinforcing is carried out on the bottom of the roadway through the reinforcing component;
s2, anchor rod cable net support: laying anchor cables and anchor rods on the roadway top and the roadway side, installing anchor rod cable net components, after fixing, spraying slurry to cover the anchor rod cable net components and the outer side surfaces of the anchor cable pieces to be flush, and performing primary supporting on the anchor cables and the anchor rods which are divided into surface anchor rods and deep anchor rods;
s3, surface layer gap expansion: carrying out acoustic vibration clearance expansion on a shallow position on the surface layer of the roadway by using acoustic waves through an acoustic wave generator;
s4, surface layer grouting: after the surface layer is subjected to clearance expansion, grouting the shallow position of the side wall of the roadway by using the surface layer anchor rod in the S;
s5, deep layer gapping: after the slurry strength in the surface layer is improved, the sound wave generator is utilized again, parameters are adjusted, and sound waves are utilized for carrying out sound wave vibration gap expansion at the deep position of the roadway;
s6, deep grouting: after the deep layer is subjected to clearance expansion, grouting at the deep layer position of the roadway by using the deep anchor rod in the S;
s7, concrete filling: and filling concrete into the reinforcing groove to enable the reinforcing groove to be flush with the bottom end of the roadway.
10. The method and the process for supporting the rock burst by grouting according to claim 9, wherein the method comprises the following steps: the method comprises the following steps:
step one, reinforcing deep grouting of an anchor rod: when the reinforced anchor rod is used for grouting, the rotating disc is driven to rotate by utilizing the matching of the external cross joint and the driving groove, so that the rotating rod drives the hollow inner rod to rotate, the hollow inner rod is further pushed out from the reinforced anchor rod, the hollow inner rod is deeply drilled under the matching of the hollow drill bit, and deep grouting is carried out through the slurry leakage groove;
step two, reinforcing the surface layer of the anchor rod and grouting: and after the strength of the slurry of the deep grouting is improved, performing surface layer grouting by using a slurry outlet groove on the reinforced anchor rod.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135314A (en) * | 2021-11-12 | 2022-03-04 | 中铁大桥局集团有限公司 | Method for improving flatness of tunnel primary sprayed concrete |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195441A (en) * | 2013-04-01 | 2013-07-10 | 平顶山天安煤业股份有限公司 | Supporting and reinforcing structure of coal mine tunnel and construction technology thereof |
| CN106321119A (en) * | 2016-11-09 | 2017-01-11 | 贵州大学 | Double-layer anchor net cable supporting structure for controlling mining roadway surrounding rock deformation and method thereof |
| CN108775252A (en) * | 2018-07-26 | 2018-11-09 | 淮南矿业(集团)有限责任公司 | The supporting construction and method for protecting support in Deep Soft Rock tunnel |
| CN109372555A (en) * | 2018-12-26 | 2019-02-22 | 中国矿业大学 | A kind of fault disruption zone area tunnel 3 D stereo grouting support method |
| CN110593875A (en) * | 2019-09-26 | 2019-12-20 | 中国矿业大学 | Gob-side entry driving method of grouting anchor cable based on full period of roadway service |
-
2021
- 2021-04-06 CN CN202110364808.8A patent/CN113107523B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195441A (en) * | 2013-04-01 | 2013-07-10 | 平顶山天安煤业股份有限公司 | Supporting and reinforcing structure of coal mine tunnel and construction technology thereof |
| CN106321119A (en) * | 2016-11-09 | 2017-01-11 | 贵州大学 | Double-layer anchor net cable supporting structure for controlling mining roadway surrounding rock deformation and method thereof |
| CN108775252A (en) * | 2018-07-26 | 2018-11-09 | 淮南矿业(集团)有限责任公司 | The supporting construction and method for protecting support in Deep Soft Rock tunnel |
| CN109372555A (en) * | 2018-12-26 | 2019-02-22 | 中国矿业大学 | A kind of fault disruption zone area tunnel 3 D stereo grouting support method |
| CN110593875A (en) * | 2019-09-26 | 2019-12-20 | 中国矿业大学 | Gob-side entry driving method of grouting anchor cable based on full period of roadway service |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135314A (en) * | 2021-11-12 | 2022-03-04 | 中铁大桥局集团有限公司 | Method for improving flatness of tunnel primary sprayed concrete |
| CN114135314B (en) * | 2021-11-12 | 2023-09-26 | 中铁大桥局集团有限公司 | Method for improving flatness of tunnel primary spraying concrete |
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