CN114233352A - Multi-section grooving and splitting grouting modified surrounding rock cooperative control method and structure - Google Patents
Multi-section grooving and splitting grouting modified surrounding rock cooperative control method and structure Download PDFInfo
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- CN114233352A CN114233352A CN202111459793.XA CN202111459793A CN114233352A CN 114233352 A CN114233352 A CN 114233352A CN 202111459793 A CN202111459793 A CN 202111459793A CN 114233352 A CN114233352 A CN 114233352A
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- 239000011435 rock Substances 0.000 title claims abstract description 120
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000004873 anchoring Methods 0.000 claims abstract description 148
- 238000007789 sealing Methods 0.000 claims abstract description 26
- 238000005553 drilling Methods 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims description 31
- 238000005520 cutting process Methods 0.000 claims description 24
- 238000007569 slipcasting Methods 0.000 claims description 9
- 238000005728 strengthening Methods 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 19
- 230000008093 supporting effect Effects 0.000 description 8
- 239000003245 coal Substances 0.000 description 5
- 238000011835 investigation Methods 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011440 grout Substances 0.000 description 3
- 230000005641 tunneling Effects 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- 229910001919 chlorite Inorganic materials 0.000 description 2
- 229910052619 chlorite group Inorganic materials 0.000 description 2
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 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
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- 239000010959 steel Substances 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/021—Grouting with inorganic components, e.g. cement
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/025—Grouting with organic components, e.g. resin
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
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- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
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Abstract
The invention relates to the technical field of roadway support, and provides a multi-section grooving and splitting grouting modified surrounding rock cooperative control method and structure. The multi-section grooving and splitting grouting modified surrounding rock cooperative control method comprises the following steps: drilling a hole in surrounding rock of a roadway to form an anchor hole, and performing multi-section grooving on the hole wall of the anchor hole to form a grooving section; placing an anchoring piece into the anchor hole, and placing a hole sealing device at the tail part of the anchoring piece close to the side wall of the roadway, wherein the hole sealing device is used for sealing the anchor hole; and forming a grouting section in the anchor hole through high-pressure splitting grouting so as to form a high-pressure splitting grouting reinforced area on the surrounding rock around the grouting section. According to the multi-section grooving and splitting grouting modified surrounding rock cooperative control method, the anchoring part is stably anchored, and the safety degree and effect of surrounding rock control are improved.
Description
Technical Field
The invention relates to the technical field of roadway support, in particular to a multi-section grooving and splitting grouting modified surrounding rock cooperative control method and structure.
Background
The roadway surrounding rock control technology is a key technology in coal mining, and the safe, reasonable and effective roadway support technology is a necessary condition for ensuring high yield and high efficiency of mines.
Aiming at the problem of surrounding rock control in the roadway excavation process, the conventional anchor net cable support is popularized and applied in a large scale due to safety and convenience. The stable reinforcing zone is formed in the surrounding rock through anchor rod and anchor cable support, the bearing effect of the surrounding rock is fully exerted, and the stability of the surrounding rock is ensured.
However, in the excavation process of a coal mine tunnel, the geological conditions of surrounding rocks are complex, cracks develop, the content of soft rock components such as kaolin, chlorite and the like in different rock strata is high, and the soft rock components are influenced by water drenching, temperature and geological structure in the excavation process, so that the anchoring force of an anchor rod and an anchor cable is insufficient in the control process of the tunnel surrounding rocks, the deformation of the surrounding rocks is large, the fracture surface is seriously shrunk, the coal mine tunnel is repaired for many times, even a disaster roof accident can be caused, and the safety production of a coal mine is seriously influenced.
Disclosure of Invention
The invention provides a multi-section grooving and splitting grouting modified surrounding rock cooperative control method and structure, which are used for overcoming the defects of insufficient anchoring force and serious later attenuation in the anchoring process of an anchor rod and an anchor cable caused by large deformation of surrounding rock in the prior art and realizing the improvement of the safety degree and effect of surrounding rock control.
The invention provides a multi-section grooving and splitting grouting modified surrounding rock cooperative control method, which comprises the following steps:
drilling a hole in surrounding rock of a roadway to form an anchor hole, and performing multi-section grooving on the hole wall of the anchor hole to form a grooving section;
placing an anchoring piece into the anchor hole, and placing a hole sealing device at the tail part of the anchoring piece close to the side wall of the roadway, wherein the hole sealing device is used for sealing the anchor hole;
and forming a grouting section in the anchor hole through high-pressure splitting grouting so as to form a high-pressure splitting grouting reinforced area on the surrounding rock around the grouting section.
According to the cooperative control method for the multi-section cutting groove and splitting grouting modified surrounding rock, provided by the invention, the step of forming the grouting section in the anchor hole through high-pressure splitting grouting comprises the following steps:
firstly, injecting a resin anchoring agent into the bottom of the anchor hole to form an anchoring agent anchoring section, wherein the anchoring agent anchoring section wraps the anchoring end of the anchoring element;
and forming the grouting section on the rest part of the anchor hole by high-pressure splitting grouting.
According to the cooperative control method for the multi-section cutting groove and splitting grouting modified surrounding rock, provided by the invention, the step of forming the grouting section in the anchor hole through high-pressure splitting grouting comprises the following steps:
and forming the grouting section on the full-length section of the anchor hole by high-pressure splitting grouting.
According to the cooperative control method for the multi-section grooving and splitting grouting modified surrounding rock, provided by the invention, the steps of drilling holes in the surrounding rock of the roadway to form anchor holes and performing multi-section grooving on the hole walls of the anchor holes comprise:
determining the intervals of the multiple sections of the grooving sections according to the drilling depth and the surrounding rock property;
and utilizing a drilling grooving tool to perform multi-section grooving, and forming the anchor hole and the grooving section through one-time hole forming.
According to the cooperative control method for the multi-section grooving and splitting grouting modified surrounding rock, provided by the invention, the step of placing the anchoring piece into the anchor hole comprises the following steps:
the rod body of the anchoring piece is provided with a plurality of friction structures, and the distance between the friction structures is determined according to the drilling depth.
The invention also provides a multi-section grooving and splitting grouting modified surrounding rock cooperative control structure, which comprises:
the anchoring part is arranged on the side wall of the roadway, and a hole sealing device is arranged at the tail part of the anchoring part close to the side wall of the roadway;
the grouting section is positioned in surrounding rocks of the roadway and provided with a plurality of grouting groove cutting sections which are arranged at intervals along the length direction of the anchoring piece, and the grouting section wraps the anchoring piece and abuts against the hole sealing device;
and the high-pressure splitting grouting strengthening area is positioned at the periphery of the grouting section.
According to the multi-section cutting groove and splitting grouting modified surrounding rock cooperative control structure provided by the invention, the multi-section cutting groove and splitting grouting modified surrounding rock cooperative control structure further comprises an anchoring agent anchoring section, the anchoring agent anchoring section is provided with a plurality of sections of anchoring agent cutting groove sections which are arranged at intervals along the length direction of an anchoring piece, the anchoring agent anchoring section and the grouting section are arranged in parallel along the length direction of the anchoring piece, and the anchoring agent anchoring section is positioned on one side of the anchoring end of the anchoring piece.
According to the multi-section grooving and splitting grouting modified surrounding rock cooperative control structure provided by the invention, the grouting section extends to the hole sealing device from the anchoring end of the anchoring part.
According to the multi-section grooving and splitting grouting modified surrounding rock cooperative control structure provided by the invention, the rod body of the anchoring part is also provided with a plurality of friction structures arranged at intervals, and the grouting section is wrapped on the friction structures.
The invention also provides a roadway surrounding rock modified structure, which comprises a plurality of multi-section cutting grooves and split grouting modified surrounding rock cooperative control structures;
and the high-pressure splitting grouting reinforcement areas of the adjacent multi-section cutting groove and splitting grouting modified surrounding rock cooperative control structure are arranged in a crossing manner.
According to the multi-section grooving and splitting grouting modified surrounding rock cooperative control method and structure, the anchoring strength of the anchoring section is improved through the grooving section formed by the multi-section grooving, in addition, the surrounding rock is modified through the high-pressure splitting grouting strengthening area formed by splitting grouting during grouting, the strength of the surrounding rock around the anchor hole is improved, the compactness of the anchoring section and the surrounding rock is improved, the control effects of fast tunneling of a large-deformation soft rock roadway and the surrounding rock are obviously improved through anchor supporting, and the management level of the top plate of the large-deformation soft rock roadway is improved. Compared with the anchor bolt supporting method in the prior art, the multi-section cutting groove and splitting grouting modified surrounding rock cooperative control method provided by the invention has the advantages that the anchoring of the anchor is stable, and the safety degree and effect of surrounding rock control are improved.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a cooperative control method for multi-section grooving and splitting grouting modified surrounding rock provided by the invention;
FIG. 2 is one of the schematic diagrams of the cooperative control structure of the multi-section grooving and splitting grouting modified surrounding rock provided by the invention;
FIG. 3 is a second schematic diagram of a cooperative control structure of multi-stage grooving and splitting grouting modified surrounding rock provided by the present invention;
FIG. 4 is a schematic diagram of a modified structure of roadway surrounding rock provided by the invention;
reference numerals:
10: an anchoring member; 11: a hole sealing device; 12: grouting a tray;
13: a friction structure; 20: a grouting section; 21: grouting a slot cutting section;
22: high-pressure splitting grouting strength of 30: an anchoring agent anchoring section; 31: and the anchoring agent is cut into groove sections. A chemical region;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
When the roadway is supported, the anchoring piece is used for forming a reinforcing zone in the roadway surrounding rock, the bearing effect of the surrounding rock is exerted, and the stability of the surrounding rock is ensured, so that the anchoring stability of the anchoring piece needs to be ensured, and the problems of insufficient anchoring force and support failure cannot occur. The method and the structure of the invention are not only used in the laneway, but also can be used in other places needing to improve the supporting effect according to the needs. The method and the structure can be a preset supporting method before the roadway is excavated or a repairing supporting method during later roadway repairing, wherein the roadway needs to be repaired to the initial design shape of the roadway first during the roadway repairing, and then the method is adopted. The shape of the tunnel is not limited to the arch shape provided in the embodiment of the present invention, and may also be a square shape or other shapes according to the use requirement, which is not described in detail.
The anchoring member may be an anchoring structure such as a bolt or an anchor cable.
The cooperative control method and structure of the multi-section grooving and splitting grouting modified surrounding rock of the invention are described below with reference to fig. 1 to 4.
Referring to fig. 1, in an embodiment of the present invention, a method for cooperatively controlling a multi-section grooving and splitting grouting modified surrounding rock includes:
drilling a hole in surrounding rock of a roadway to form an anchor hole, and performing multi-section grooving on the hole wall of the anchor hole to form a grooving section; the drilling is perpendicular to the side wall of the roadway, the grooving sections are formed on the hole wall of the anchor hole, the positions and the intervals of the grooving sections are not limited, in the embodiment, the grooving sections are of annular ring-shaped hole structures, the grooving sections of the structure can improve the structural strength of the anchoring section placed on the surrounding rock, the anchoring section is prevented from being separated from the surrounding rock, and the supporting effect of the anchoring piece 10 is improved.
Placing an anchoring part 10 into the anchor hole, and placing a hole sealing device 11 at the tail part of the anchoring part 10 close to the side wall of the roadway, wherein the hole sealing device 11 is used for sealing the anchor hole; the afterbody of anchor assembly 10 is equipped with sealing device 11, and in this embodiment, this sealing device 11 is body of rod gripping formula side direction sealing device, and the sealer interface of sealing device 11 can link to each other with the grouting pump to grout into the anchor eye, and avoid mud to spill, in addition, still is equipped with slip casting tray 12 at the afterbody of anchor assembly 10, and slip casting tray 12 supports the lateral wall in tunnel, can be used for fixed anchor net isotructure.
Forming a grouting section 20 in the anchor hole through high-pressure splitting grouting so as to form a high-pressure splitting grouting reinforced area 22 in the surrounding rock around the grouting section 20; adopt high-pressure splitting slip casting in the anchor hole, can will fill in the crack around to realize modifying to crack around, form high-pressure splitting slip casting and reinforce district 22, reach the effect of miniature bored pile, improve the closely knit nature of country rock, guarantee the anchor effect, in this embodiment, high-pressure splitting slip casting is low pressure and fills high-pressure splitting chronogenesis slip casting.
In addition, before drilling, firstly, investigation is carried out on the stress, the structure (such as surrounding rock cracks), the soft rock components (such as kaolin, chlorite and the like), the influence range and the like of the surrounding rock of the roadway, the investigation result is evaluated, the characteristics of the weakly cemented soft rock and the high-stress soft rock are determined, and on the basis of the former investigation, the control width of the surrounding rock of the single anchoring piece 10 and the depth of the anchoring piece 10 needing drilling are determined, so that subsequent construction is facilitated.
In the embodiment, the grooving sections formed by the multiple grooving sections improve the anchoring strength of the anchoring section, and during grouting, the high-pressure splitting grouting strengthening area 22 formed by splitting grouting modifies surrounding rocks, improves the strength of the surrounding rocks around the anchor hole, improves the compactness of the anchoring section and the surrounding rocks, supports by the anchoring part 10, obviously improves the control effect of fast tunneling and surrounding rocks of the large-deformation soft rock roadway, and improves the management level of the top plate of the large-deformation soft rock roadway. Compared with the anchor bolt supporting method of the anchoring part 10 provided by the prior art, the multi-section cutting groove and split grouting modified surrounding rock cooperative control method provided by the invention has the advantages that the anchoring part 10 is stably anchored, and the safety degree and effect of surrounding rock control are improved.
Referring to fig. 1, in one embodiment of the present invention, there are at least two methods for anchoring the anchoring element 10, and in one embodiment, the step of forming the grouting section 20 in the anchor hole by high-pressure split grouting includes:
firstly, injecting resin anchoring agent into the bottom of the anchor hole to form an anchoring agent anchoring section 30, wherein the anchoring agent anchoring section 30 wraps the anchoring end of the anchoring element 10;
and forming the grouting section 20 in the rest part of the anchor hole by high-pressure split grouting.
The bottom of the anchor hole is anchored by resin to form an anchoring agent anchoring section 30 with a certain length, the rest of the anchoring agent anchoring section is anchored by grouting, and the anchoring agent anchoring section 30 is also filled in the given slot section, so that the anchoring effect of the end part of the anchoring element 10 can be ensured.
Referring to fig. 1, in another embodiment, the step of forming a grouting section 20 in the anchor hole by high-pressure split grouting includes:
the grouted section 20 is formed by high pressure cleavage grouting over the full length of the anchor eye.
That is, the grouting is performed in all areas of the anchor hole, so that the strength of the whole anchoring section can be improved, and the high-pressure split grouting reinforcement area 22 is larger than that of the embodiment, so that the structural strength of surrounding rocks is higher, and the method is suitable for the roadway with loose supporting time.
Referring to fig. 1, in an embodiment of the present invention, the step of drilling a hole in a surrounding rock of a roadway to form an anchor hole and performing a multi-stage grooving on a hole wall of the anchor hole includes:
determining the intervals of the multiple sections of the grooving sections according to the drilling depth and the surrounding rock property;
and utilizing a drilling grooving tool to perform multi-section grooving, and forming the anchor hole and the grooving section through one-time hole forming.
In the process of tunneling and drilling, a mechanical or hydraulic grooving mode is adopted, self-grooving is formed at the hole wall at a certain interval, secondary construction of common hole expansion is avoided, and drilling efficiency is improved.
Of course, in other embodiments, the hole may be drilled first, and then the slot may be cut into the anchor hole for multiple times to obtain the slot segment, which will not be described in detail.
Referring to fig. 1, in addition, in an embodiment of the present invention, the step of placing the anchor member 10 into the anchor hole is preceded by:
a plurality of friction structures 13 are arranged on a rod body of the anchoring piece 10, and the distance between the friction structures 13 is determined according to the drilling depth.
Through setting up friction structure 13, can make the joint strength between anchor assembly 10 and the anchor section further improve to improve and strut the effect, in this embodiment, the interval between a plurality of friction structure 13 equals, in order to improve the holistic anchor effect of anchor assembly 10. Optionally, the distance of the friction structure 13 is 30-50cm, and the distance can be specifically adjusted according to the surrounding rock conditions.
In one embodiment, the friction structure 13 may be a plurality of screws welded to the outer periphery of the anchor 10, and after the grout is injected, the screws and grout may form a reinforced concrete structure, further increasing the overall structural strength. Of course, in other embodiments, the friction structure 13 may be a steel wire or other structure surrounding the periphery of the anchor 10, which is not described in detail.
In one embodiment of the invention, when high-pressure splitting grouting is used, the grouting pressure for a coal roadway is not more than 10Mpa, and the grouting pressure for a rock roadway is not more than 30Mpa, so that the grouting effect is ensured, and the filling of high-pressure splitting grouting on the cracks of the drilled surrounding rock is met, so that the surrounding rock is reinforced.
Referring to fig. 2 and fig. 3 in combination, based on the above method, the present invention obtains a multi-section grooving and splitting grouting modified surrounding rock cooperative control structure, including:
the anchoring part 10 is arranged on the side wall of the roadway, and a hole sealing device 11 is arranged at the tail part, close to the side wall of the roadway, of the anchoring part 10;
the grouting section 20 is positioned in surrounding rocks of the roadway, the grouting section 20 is provided with a plurality of grouting groove cutting sections 21 which are arranged at intervals along the length direction of the anchoring piece 10, and the grouting section 20 wraps the anchoring piece 10 and abuts against the hole sealing device 11;
and the high-pressure splitting grouting strengthening area 22 is positioned at the periphery of the grouting section 20, and the high-pressure splitting grouting strengthening area 22 is positioned at the periphery of the grouting section 20.
The structure improves the structural strength of the anchoring section and surrounding rocks, so that the anchoring part 10 is stably anchored, and the safety degree and effect of surrounding rock control are improved.
Corresponding to the method, when the resin anchoring agent and grouting are adopted to fill the anchor hole simultaneously, the multi-section grooving and splitting grouting modified surrounding rock cooperative control structure further comprises an anchoring agent anchoring section 30, the anchoring agent anchoring section 30 is provided with a plurality of sections of anchoring agent grooving sections 31 arranged at intervals along the length direction of the anchoring element 10, the anchoring agent anchoring section 30 and the grouting section 20 are arranged in parallel along the length direction of the anchoring element 10, and the anchoring agent anchoring section 30 is positioned on one side of the anchoring end of the anchoring element 10.
When full-length grouting is adopted, the grouting section 20 extends from the anchoring end of the anchoring part 10 to the hole sealing device 11.
In addition, still be provided with a plurality of interval arrangement friction structure 13 on the body of rod of anchor member 10, slip casting section 20 parcel in friction structure 13. Based on the two anchoring methods of the anchoring part 10, when the resin anchoring agent and the grouting are adopted to fill the anchoring hole at the same time, the anchoring part 30 and the grouting part 20 both wrap the friction structure 13 and are fully contacted with the friction structure 13, so that the anchoring strength of the anchoring part 10 is improved, and when the full-length grouting is adopted, the whole anchoring part can form a structure similar to reinforced concrete, so that the integral strength is further improved.
Referring to fig. 4, in addition, the present invention further provides a roadway surrounding rock modified structure, which includes a plurality of multi-section cutting grooves and split grouting modified surrounding rock cooperative control structures as described above;
and the high-pressure splitting grouting strengthening areas 22 of the adjacent multi-section cutting groove and splitting grouting modified surrounding rock cooperative control structure are arranged in a crossed manner.
Namely, in order to improve the holistic control effect in tunnel, set up a plurality of cooperative control structures, and high pressure splitting slip casting intensification district 22 cross arrangement to make the country rock structure in tunnel modified, the very big improvement of intensity forms the whole anchor structure of tunnel country rock, guarantees that tunnel country rock is stable, has improved the control effect of tunnel country rock greatly.
Specifically, on the basis of the prior investigation, the control width of the surrounding rock of the single anchoring piece 10 is determined, so as to determine the distance between the adjacent anchoring pieces 10, in this embodiment, the anchoring pieces 10 are uniformly arranged at intervals along the width direction of the surrounding rock of the roadway. Further, along the length direction of tunnel country rock, the even interval of a plurality of anchor assembly 10 sets up, and a plurality of anchor assembly 10 are whole to be plum blossom form and arrange, like this, compare with other modes, can guarantee that the country rock is whole to be modified, and the effect is better, and then improves the structural strength of tunnel country rock to improve and strut the effect.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A multi-section grooving and splitting grouting modified surrounding rock cooperative control method is characterized by comprising the following steps:
drilling a hole in surrounding rock of a roadway to form an anchor hole, and performing multi-section grooving on the hole wall of the anchor hole to form a grooving section;
placing an anchoring piece into the anchor hole, and placing a hole sealing device at the tail part of the anchoring piece close to the side wall of the roadway, wherein the hole sealing device is used for sealing the anchor hole;
and forming a grouting section in the anchor hole through high-pressure splitting grouting so as to form a high-pressure splitting grouting reinforced area on the surrounding rock around the grouting section.
2. The cooperative control method for the multi-section cutting groove and splitting grouting modified surrounding rock according to claim 1, wherein the step of forming a grouting section in the anchor hole through high-pressure splitting grouting comprises the following steps:
firstly, injecting a resin anchoring agent into the bottom of the anchor hole to form an anchoring agent anchoring section, wherein the anchoring agent anchoring section wraps the anchoring end of the anchoring element;
and forming the grouting section on the rest part of the anchor hole by high-pressure splitting grouting.
3. The cooperative control method for the multi-section cutting groove and splitting grouting modified surrounding rock according to claim 1, wherein the step of forming a grouting section in the anchor hole through high-pressure splitting grouting comprises the following steps:
and forming the grouting section on the full-length section of the anchor hole by high-pressure splitting grouting.
4. The cooperative control method for the multi-segment grooving and splitting grouting modified surrounding rock according to any one of claims 1 to 3, wherein the step of drilling a hole in the surrounding rock of a roadway to form an anchor hole and performing multi-segment grooving on the hole wall of the anchor hole comprises the following steps:
determining the intervals of the multiple sections of the grooving sections according to the drilling depth and the surrounding rock property;
and utilizing a drilling grooving tool to perform multi-section grooving, and forming the anchor hole and the grooving section through one-time hole forming.
5. The cooperative control method for the multi-section grooving and splitting grouting modified surrounding rock according to any one of claims 1 to 3, wherein the step of placing the anchoring element into the anchoring hole is preceded by:
the rod body of the anchoring piece is provided with a plurality of friction structures, and the distance between the friction structures is determined according to the drilling depth.
6. The utility model provides a modified country rock cooperative control structure of multistage grooving and splitting slip casting which characterized in that includes:
the anchoring part is arranged on the side wall of the roadway, and a hole sealing device is arranged at the tail part of the anchoring part close to the side wall of the roadway;
the grouting section is positioned in surrounding rocks of the roadway and provided with a plurality of grouting groove cutting sections which are arranged at intervals along the length direction of the anchoring piece, and the grouting section wraps the anchoring piece and abuts against the hole sealing device;
and the high-pressure splitting grouting strengthening area is positioned at the periphery of the grouting section.
7. The multi-segment cutting groove and splitting grouting modified surrounding rock cooperative control structure as claimed in claim 6, wherein the multi-segment cutting groove and splitting grouting modified surrounding rock cooperative control structure further comprises an anchoring agent anchoring section, the anchoring agent anchoring section is provided with a plurality of segments of anchoring agent cutting groove sections which are arranged at intervals along the length direction of an anchoring element, the anchoring agent anchoring section and the grouting section are arranged side by side along the length direction of the anchoring element, and the anchoring agent anchoring section is positioned on one side of the anchoring end of the anchoring element.
8. The cooperative control structure of the multi-segment cutting groove and splitting grouting modified surrounding rock of claim 6, wherein the grouting segment extends from the anchoring end of the anchoring part to the hole sealing device.
9. The cooperative control structure of the multi-section cutting groove and the split grouting modified surrounding rock according to any one of claims 6 to 8, wherein a plurality of friction structures are arranged at intervals on a rod body of the anchoring piece, and the grouting section is wrapped on the friction structures.
10. A roadway surrounding rock modified structure, which is characterized by comprising a plurality of multi-section cutting and splitting grouting modified surrounding rock cooperative control structures according to any one of claims 6 to 9;
and the high-pressure splitting grouting reinforcement areas of the adjacent multi-section cutting groove and splitting grouting modified surrounding rock cooperative control structure are arranged in a crossing manner.
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| CN202111459793.XA CN114233352A (en) | 2021-12-02 | 2021-12-02 | Multi-section grooving and splitting grouting modified surrounding rock cooperative control method and structure |
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| CN (1) | CN114233352A (en) |
Citations (7)
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| CN205477690U (en) * | 2016-03-23 | 2016-08-17 | 山东科技大学 | Antiskid slip casting stock |
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| WO2020007055A1 (en) * | 2018-12-27 | 2020-01-09 | 山东科技大学 | Combined tension and compression yielding and energy-absorbing grouting anchor bolt for large deformation in surrounding rock, and working method |
| CN110761819A (en) * | 2019-10-31 | 2020-02-07 | 天地科技股份有限公司 | Prestressed grouting anchor rod |
| CN111764864A (en) * | 2020-07-10 | 2020-10-13 | 中国矿业大学 | Drilling and guniting reinforcement method for loose and broken coal and rock area |
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| CN101793157A (en) * | 2010-03-23 | 2010-08-04 | 北京科技大学 | Method for supporting filling body |
| CN103758450A (en) * | 2014-01-17 | 2014-04-30 | 北京市市政工程研究院 | Self-drilling anchor rod boring device capable of reaming at the same time |
| CN205477690U (en) * | 2016-03-23 | 2016-08-17 | 山东科技大学 | Antiskid slip casting stock |
| WO2020007055A1 (en) * | 2018-12-27 | 2020-01-09 | 山东科技大学 | Combined tension and compression yielding and energy-absorbing grouting anchor bolt for large deformation in surrounding rock, and working method |
| CN109798140A (en) * | 2019-02-21 | 2019-05-24 | 平顶山天安煤业股份有限公司六矿 | Km Deep Soft Rock fracture grouting support reinforcement method |
| CN110761819A (en) * | 2019-10-31 | 2020-02-07 | 天地科技股份有限公司 | Prestressed grouting anchor rod |
| CN111764864A (en) * | 2020-07-10 | 2020-10-13 | 中国矿业大学 | Drilling and guniting reinforcement method for loose and broken coal and rock area |
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