CN108756973B - Split full-length anchoring flexible grouting anchor rod and grouting anchoring method - Google Patents
Split full-length anchoring flexible grouting anchor rod and grouting anchoring method Download PDFInfo
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- CN108756973B CN108756973B CN201810895812.5A CN201810895812A CN108756973B CN 108756973 B CN108756973 B CN 108756973B CN 201810895812 A CN201810895812 A CN 201810895812A CN 108756973 B CN108756973 B CN 108756973B
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- 238000004873 anchoring Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000000178 monomer Substances 0.000 claims abstract description 57
- 238000007789 sealing Methods 0.000 claims abstract description 41
- 239000002002 slurry Substances 0.000 claims abstract description 25
- 239000003245 coal Substances 0.000 claims abstract description 22
- 239000011435 rock Substances 0.000 claims abstract description 11
- 238000005553 drilling Methods 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 13
- 244000198134 Agave sisalana Species 0.000 claims description 4
- 235000011624 Agave sisalana Nutrition 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 238000007569 slipcasting Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 238000005065 mining Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
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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
- E21D20/028—Devices or accesories for injecting a grouting liquid in a bore-hole
-
- 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
-
- 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
- E21D21/008—Anchoring or tensioning means
-
- 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
- E21D21/0093—Accessories
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention discloses a split full-length anchoring flexible grouting anchor rod and a grouting anchoring method, and relates to the technical field of mining engineering anchoring devices, wherein the grouting anchor rod comprises a semi-annular grouting pipe monomer, grouting holes are formed in the outer wall of the semi-annular grouting pipe monomer, and a flexible body is arranged in a groove formed in the inner wall of the semi-annular grouting pipe monomer; the two adjacent semi-annular grouting pipe monomers are communicated through a connecting piece, and the shape of the connecting piece is the same as the cross section shape of the semi-annular grouting pipe monomers; the locking device is used for locking the connecting piece, the flexible body and two adjacent semi-annular grouting pipe monomers; the hole sealing baffle is arranged at one end of the semi-annular grouting pipe monomer and used for preventing slurry in a drilled hole from flowing outwards, the hole sealing baffle is provided with a grouting pipe inserting hole, and the shape of the grouting pipe inserting hole is the same as the cross section of a structure formed by combining the flexible body and the semi-annular grouting pipe monomer. The invention can control the damage of the coal walls or roof such as large mining height, soft coal seam, upward inclined mining, broken roof and the like, and improve the stability of surrounding rock of stope.
Description
Technical Field
The invention relates to the technical field of rock wall anchoring devices in mining engineering, in particular to a split full-length anchoring flexible grouting anchor rod and a grouting anchoring method.
Background
The problems of too high crushing degree of the coal wall caving and the top plate in the coal exploitation process seriously affect the safe and efficient production of coal, and particularly the phenomenon of the coal wall caving is very serious in the large-mining-height, upward-inclined exploitation and soft coal seam exploitation processes, thereby greatly threatening the safety of production personnel and equipment. The treatment of the coal wall caving at present mainly comprises an ultrahigh pressure water injection technology, a reinforced roof support and a flexible reinforcement technology. The ultrahigh pressure water wall caving prevention technology and the reinforced roof support method have an effective effect on preventing coal wall caving, but the characteristics of complex operation and high cost influence the wide popularization and application. The anchor rod and anchor cable reinforcing technology is the most widely applied and common technical method at the present stage, but cannot carry out reinforcing control on the coal wall due to the characteristic that the materials cannot be separated by the coal mining machine, so that the flexible reinforcing technology has the advantages of low cost, simple operation and remarkable control effect, but the required drilling diameter is larger, and the palm rope and the grouting pipe are placed at the side-by-side tangential position, so that the drilling space is greatly wasted.
Disclosure of Invention
The invention aims to provide a split full-length anchoring flexible grouting anchor rod and a grouting anchoring method, which are convenient for underground construction operation, can save the slurry consumption, effectively reduce the construction cost and enhance the adaptability of the grouting anchor rod, so as to solve the technical problems in the background technology.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the invention provides a split full-length anchoring flexible grouting anchor rod, which comprises a semi-annular grouting pipe monomer, a connecting piece, a flexible body, a locking device and a hole sealing baffle plate, wherein a grouting channel is arranged on the semi-annular grouting pipe monomer, a grouting hole is formed in the outer side wall of the grouting channel, and the flexible body is arranged in a groove formed in the inner side wall of the grouting channel;
the two adjacent semi-annular grouting pipe monomers are communicated through the connecting piece, and the shape of the connecting piece is the same as the cross section shape of the semi-annular grouting pipe monomer;
the locking device is used for locking the connecting piece, the flexible body and two adjacent semi-annular grouting pipe monomers;
the hole sealing baffle is used for preventing slurry in a drilled hole from flowing outwards, a grouting pipe inserting hole is formed in the hole sealing baffle, and the shape of the grouting pipe inserting hole is the same as the cross section of a structure formed by combining the flexible body and the semi-annular grouting pipe monomer.
Further, the locking device comprises a tightening belt, one end of the tightening belt is connected with a locking buckle, and saw tooth structures used for tightening and matching are arranged on the tightening belt and the inner wall of the locking buckle.
Further, through holes for communicating the two semi-annular grouting pipe monomers are formed in the connecting piece, and the inner diameter of the outer side wall of each through hole is the same as the outer diameter of the outer side wall of each semi-annular grouting pipe monomer.
Further, the hole sealing baffle plate is circular, and the outer diameter of the hole sealing baffle plate is the same as the diameter of the drilled hole.
Further, the semi-annular grouting pipe monomer is integrally made of aluminum or PVC material.
Further, the flexible body is cylindrical, and is made of plastic, polyester fiber or sisal hemp palm rope.
Further, the outer diameter of the outer side wall of the semi-annular grouting pipe monomer is 5-10mm smaller than the diameter of the drilling hole.
Further, the connecting member is made of a rubber material.
Further, the hole sealing baffle plate is made of a metal material.
In another aspect of the invention, a method for grouting and anchoring a coal rock wall by using the split full-length anchoring flexible grouting anchor rod is provided, and the method comprises the following steps:
step S110: drilling holes on the coal rock wall or the roof to be grouting anchored, wherein the diameter of the drilled holes is larger than the outer diameter of the semi-annular grouting pipe monomer;
step S120: sequentially connecting a required number of semi-annular grouting pipe monomers through connecting pieces according to the depth of the drilled holes, simultaneously placing the flexible body in a groove of the semi-annular grouting pipe monomers, and clamping the flexible body, the connecting pieces and the two adjacent semi-annular grouting pipe monomers at the connecting positions by using a locking device;
step S130: the assembled grouting anchor rod is sent into a drilling hole, and after the grouting anchor rod is completely inserted into the drilling hole, a grouting pump is connected with a semi-annular grouting pipe monomer by a connecting piece, and the grouting anchor rod is clamped by a locking device to prevent slurry from leaking out;
step S140: installing a hole sealing baffle, inserting a grouting anchor rod into a hole through a grouting pipe in the middle of the hole sealing baffle, limiting the position of the hole sealing baffle by using a locking buckle of a locking device at the outer side of the hole sealing baffle, and placing the hole sealing baffle to slip;
step S150: pressurizing and injecting the slurry, taking down the grouting pump after the slurry is injected, and fastening the connecting piece by using the locking device to prevent the slurry from flowing out;
step S160: plugging the drilling hole, filling a hole opening of the drilling hole by using a wedge-shaped wood plug with the diameter slightly larger than the diameter of the drilling hole, and preventing the hole sealing baffle from being flushed away by expansion after slurry reaction;
step S170: and (5) repeating the steps S110-S160 until grouting and anchoring of all the coal rock walls needing grouting and anchoring are completed.
The invention has the beneficial effects that: the grouting pipe is manufactured into a semi-annular shape, flexible bodies such as a palm rope are placed in the grooves of the semi-annular grouting pipe, the integral space of the grouting pipe and the palm rope is effectively saved, the drilling diameter can be correspondingly reduced under the condition of achieving the same effect, underground construction operation can be facilitated, the slurry consumption is saved, the construction cost is effectively reduced, and the adaptability of the grouting anchor rod is enhanced.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a perspective view of a split full length anchoring flexible grouting anchor without a locking device according to an embodiment of the present invention.
Fig. 2 is a perspective view of a split full length anchoring flexible grouting anchor using a locking device according to an embodiment of the present invention.
Fig. 3 is a perspective view of a semi-annular grouting pipe monomer according to an embodiment of the present invention.
Fig. 4 is a perspective view of a connector according to an embodiment of the present invention.
Fig. 5 is a perspective view of a locking device according to an embodiment of the present invention.
Fig. 6 is a perspective view of a hole sealing baffle according to an embodiment of the present invention.
Fig. 7 is a flow chart of a method for grouting and anchoring a coal wall or roof using a split full length anchored flexible grouting anchor according to an embodiment of the present invention.
Wherein: 1-semi-annular grouting pipe monomers; a 2-connector; 3-a flexible body; 4-locking device; 5-hole sealing baffle plates; 6-grouting channels; 7-grouting holes; 8-grooves; 9-grouting pipe insertion holes; 401-tightening the strap; 402-locking buckle; 403-saw tooth structure; 10-through holes.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by way of the drawings are exemplary only and should not be construed as limiting the invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, and/or groups thereof. It will be understood that "connected" or "coupled" as used herein may include wireless connection or coupling, and that the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
In order that the invention may be readily understood, a further description of the invention will be rendered by reference to specific embodiments that are illustrated in the appended drawings and are not to be construed as limiting embodiments of the invention.
It will be appreciated by those skilled in the art that the drawings are merely schematic representations of examples and that the elements of the drawings are not necessarily required to practice the invention.
Example 1
As shown in fig. 1 to 2, a first embodiment of the present invention provides a split type full-length anchoring flexible grouting anchor rod, which comprises a semi-annular grouting pipe monomer 1, a connecting piece 2, a flexible body 3, a locking device 4 and a hole sealing baffle 5, wherein a grouting channel 6 is arranged on the semi-annular grouting pipe monomer 1, a grouting hole 7 is arranged on the outer side wall of the grouting channel 6, and a groove 8 formed on the inner side wall of the grouting channel 6 is internally provided with the flexible body 3;
as shown in fig. 3 to 4, two adjacent semi-annular grouting pipe monomers 1 are communicated through the connecting piece 2, and the shape of the connecting piece 2 is the same as the cross section shape of the semi-annular grouting pipe monomers 1;
the locking device 4 is used for locking the connecting piece 2, the flexible body 3 and the two adjacent semi-annular grouting pipe monomers 1;
the hole sealing baffle plate 5 is used for preventing slurry in a drilled hole from flowing outwards, the hole sealing baffle plate 5 is provided with a grouting pipe inserting hole 9, and the shape of the grouting pipe inserting hole 9 is the same as the cross section of a structure formed by combining the flexible body 3 and the semi-annular grouting pipe monomer 1.
In a first embodiment of the present invention, as shown in fig. 5, the locking device 4 includes a tightening strap 401, one end of the tightening strap 401 is connected with a locking buckle 402, and saw tooth structures 403 for tightening fit are disposed on the tightening strap 401 and on the inner wall of the locking buckle 402.
The locking device is used for clamping the connecting piece and the grouting pipe, and preventing the grouting pipe from being separated from the connecting piece due to the fact that the grouting pipe is propped against the connecting piece under the pressure of slurry in the grouting pressurization process.
In a first embodiment of the present invention, the connecting piece 2 is provided with a through hole 10 for connecting the two semi-annular grouting pipe monomers 1, and an inner diameter of an outer side wall of the through hole 10 is the same as an outer diameter of an outer side wall of the semi-annular grouting pipe monomer 1.
In a first embodiment of the present invention, as shown in fig. 6, the hole sealing baffle 5 is circular, and the outer diameter of the hole sealing baffle 5 is the same as the diameter of the drilled hole.
In a first embodiment of the present invention, the semi-annular grouting pipe monomer 1 is integrally made of aluminum or PVC material.
In practical application, the semi-annular grouting pipe is made of aluminum, slurry flows along a grouting channel, the semi-annular grouting pipe is in a semi-annular shape, the inner diameter is consistent with the diameter of a flexible body, the outer diameter is usually smaller than the diameter of a drilling hole by 5-10mm, the length of the semi-annular grouting pipe is determined according to the condition of a mining site, the length of the semi-annular grouting pipe is usually 2-3m according to the reinforcing range, the grouting pipe can be lengthened or intercepted, the slurry flows in the pipe, and a small opening is formed in the outer side of the pipe wall and used for flowing out the slurry.
The material for manufacturing the semi-annular grouting pipe monomer is not limited by the material, and a person skilled in the art can select a proper material to manufacture the semi-annular grouting pipe monomer according to practical situations.
In a first embodiment of the invention, the flexible body 3 is cylindrical, and the flexible body 3 is made of plastic, polyester fiber or sisal hemp.
In practical application, the flexible body is sisal hemp palm rope, is placed in the groove position of the semi-annular grouting pipe, is used for reinforcing and controlling the main supporting body, the length of the main supporting body is cut out from the control range of the required coal body or rock stratum, the diameter of the main supporting body is determined according to the requirement of reinforcing bearing capacity, and the diameter of the main supporting body is matched with the grouting pipe with the corresponding inner diameter.
In a first embodiment of the present invention, the outer diameter of the outer sidewall of the semi-annular grouting pipe monomer 1 is 5-10mm smaller than the diameter of the drilled hole.
In a first embodiment of the invention, the connecting element 2 is made of a rubber material.
In a first embodiment of the present invention, the hole sealing plate 5 is made of a metal material.
In practical application, hole sealing baffle iron, ring-like, middle trompil shape is unanimous with slip casting stock shape, and external diameter is unanimous with drilling diameter for shutoff slip casting pipe and the gap between the drilling prevent that thick liquid from flowing outwards, improve slip casting pressure.
The material for manufacturing the hole sealing baffle is not limited by the above material, and a person skilled in the art can select a proper material to manufacture the hole sealing baffle according to practical situations.
Example two
As shown in fig. 7, a second embodiment of the present invention provides a method for grouting and anchoring a coal rock wall or roof by using the split type full-length anchoring flexible grouting anchor according to the first embodiment, which mainly includes the following steps:
step S110: drilling holes on the coal rock wall or the roof to be grouting anchored, wherein the diameter of the drilled holes is larger than the outer diameter of the semi-annular grouting pipe monomer;
step S120: sequentially connecting a required number of semi-annular grouting pipe monomers through connecting pieces according to the depth of the drilled holes, simultaneously placing the flexible body in a groove of the semi-annular grouting pipe monomers, and clamping the flexible body, the connecting pieces and the two adjacent semi-annular grouting pipe monomers at the connecting positions by using a locking device;
step S130: the assembled grouting anchor rod is sent into a drilling hole, and after the grouting anchor rod is completely inserted into the drilling hole, a grouting pump is connected with a semi-annular grouting pipe monomer by a connecting piece, and the grouting anchor rod is clamped by a locking device to prevent slurry from leaking out;
step S140: installing a hole sealing baffle, inserting a grouting anchor rod into a hole through a grouting pipe in the middle of the hole sealing baffle, limiting the position of the hole sealing baffle by using a locking buckle of a locking device at the outer side of the hole sealing baffle, and placing the hole sealing baffle to slip;
step S150: pressurizing and injecting the slurry, taking down the grouting pump after the slurry is injected, and fastening the connecting piece by using the locking device to prevent the slurry from flowing out;
step S160: plugging the drilling hole, filling a hole opening of the drilling hole by using a wedge-shaped wood plug with the diameter slightly larger than the diameter of the drilling hole, and preventing the hole sealing baffle from being flushed away by expansion after slurry reaction;
step S170: and (5) repeating the steps S110-S160 until grouting and anchoring of all the coal rock walls needing grouting and anchoring are completed.
In conclusion, the split full-length anchoring flexible grouting anchor rod disclosed by the embodiment of the invention can fully exert the advantages of large mining height mining, can effectively control the occurrence of coal wall caving accidents in the large mining height mining process, and ensures the safety and high efficiency of the production process.
Those of ordinary skill in the art will appreciate that: the components in the apparatus according to the embodiments of the present invention may be distributed in the apparatus according to the embodiments, or may be located in one or more apparatuses different from the embodiments with corresponding changes. The components of the above embodiments may be combined into one component or may be further split into a plurality of sub-components.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a split type full length anchor flexible slip casting stock which characterized in that: the grouting device comprises a semi-annular grouting pipe monomer (1), a connecting piece (2), a flexible body (3), a locking device (4) and a hole sealing baffle plate (5), wherein a grouting channel (6) is arranged on the semi-annular grouting pipe monomer (1), a grouting hole (7) is formed in the outer side wall of the grouting channel (6), and the flexible body (3) is arranged in a groove (8) formed in the inner side wall of the grouting channel (6);
the two adjacent semi-annular grouting pipe monomers (1) are communicated through the connecting piece (2), and the shape of the connecting piece (2) is the same as the cross section shape of the semi-annular grouting pipe monomers (1);
the locking device (4) is used for locking the connecting piece (2), the flexible body (3) and the two adjacent semi-annular grouting pipe monomers (1);
the hole sealing baffle (5) is used for preventing slurry in a drilled hole from flowing outwards, a grouting pipe inserting hole (9) is formed in the hole sealing baffle (5), and the shape of the grouting pipe inserting hole (9) is the same as the cross-sectional shape of a structure formed by combining the flexible body (3) and the semi-annular grouting pipe monomer (1).
2. The split full length anchored flexible grouting bolt of claim 1, wherein: the locking device (4) comprises a tightening belt (401), one end of the tightening belt (401) is connected with a locking buckle (402), and saw-tooth structures (403) used for tightening and matching are arranged on the tightening belt (401) and the inner wall of the locking buckle (402).
3. The split full length anchored flexible grouting bolt of claim 2, wherein: the connecting piece (2) is provided with a through hole (10) communicated with the two semi-annular grouting pipe monomers (1), and the inner diameter of the outer side wall of the through hole (10) is the same as the outer diameter of the outer side wall of the semi-annular grouting pipe monomers (1).
4. A split full length anchored flexible grouting bolt according to claim 3, wherein: the hole sealing baffle (5) is round, and the outer diameter of the hole sealing baffle (5) is the same as the diameter of the drilled hole.
5. The split full length anchored flexible grouting bolt of claim 4, wherein: the semi-annular grouting pipe monomer (1) is integrally made of aluminum or PVC material.
6. The split full length anchored flexible grouting bolt of claim 5, wherein: the flexible body (3) is cylindrical, and the flexible body (3) is made of plastic, polyester fiber or sisal hemp palm rope.
7. The split full length anchored flexible grouting bolt of claim 6, wherein: the outer diameter of the outer side wall of the semi-annular grouting pipe monomer (1) is 5-10mm smaller than the diameter of the drilled hole.
8. The split full length anchored flexible grouting bolt of claim 7, wherein: the connecting piece (2) is made of rubber material.
9. The split full length anchored flexible grouting bolt of claim 8, wherein: the hole sealing baffle (5) is made of a metal material.
10. A method of grouting anchoring using a split full length anchoring flexible grouting anchor as defined in any one of claims 1 to 9, comprising the steps of:
step S110: drilling holes on a coal rock wall or a roof to be grouting anchored, wherein the diameter of the drilling holes is larger than the outer diameter of a semi-annular grouting pipe monomer (1);
step S120: sequentially connecting a required number of semi-annular grouting pipe monomers (1) through connecting pieces (2) according to the depth of the drilled holes, simultaneously placing a flexible body (3) in a groove (8) of the semi-annular grouting pipe monomers (1), and clamping the flexible body (3), the connecting pieces (2) and two adjacent semi-annular grouting pipe monomers (1) at the connecting positions by using a locking device (4);
step S130: the assembled grouting anchor rod is sent into a drilling hole, and after the grouting anchor rod is completely inserted into the drilling hole, a grouting pump is connected with a semi-annular grouting pipe monomer (1) through a connecting piece (2), and the grouting anchor rod is clamped through a locking device (4) to prevent slurry from leaking out;
step S140: installing a hole sealing baffle (5), enabling a grouting anchor rod to pass through a grouting pipe insertion hole (9) in the middle of the hole sealing baffle (5), limiting the position of the hole sealing baffle (5) by using a locking buckle (402) of a locking device (4), and preventing slipping;
step S150: pressurizing and injecting the slurry, taking down the grouting pump after the slurry is injected, and fastening the connecting piece (2) by using the locking device (4) to prevent the slurry from flowing out;
step S160: plugging the drilling hole, filling the hole opening of the drilling hole with a wedge-shaped wood plug with the diameter slightly larger than the diameter of the drilling hole, and preventing the hole sealing baffle plate (5) from being flushed away by expansion after slurry reaction;
step S170: and (5) repeating the steps S110-S160 until grouting and anchoring of all the coal rock walls needing grouting and anchoring are completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810895812.5A CN108756973B (en) | 2018-08-08 | 2018-08-08 | Split full-length anchoring flexible grouting anchor rod and grouting anchoring method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810895812.5A CN108756973B (en) | 2018-08-08 | 2018-08-08 | Split full-length anchoring flexible grouting anchor rod and grouting anchoring method |
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| Publication Number | Publication Date |
|---|---|
| CN108756973A CN108756973A (en) | 2018-11-06 |
| CN108756973B true CN108756973B (en) | 2023-09-08 |
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| CN201810895812.5A Active CN108756973B (en) | 2018-08-08 | 2018-08-08 | Split full-length anchoring flexible grouting anchor rod and grouting anchoring method |
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|---|---|---|---|---|
| CN110644469A (en) * | 2019-10-31 | 2020-01-03 | 中铁二院工程集团有限责任公司 | Sectional grouting device and grouting method for steel perforated pipe grouting |
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