CN217632519U - Shear-resistant anchor rod for deep roadway surrounding rock targeted control - Google Patents
Shear-resistant anchor rod for deep roadway surrounding rock targeted control Download PDFInfo
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- CN217632519U CN217632519U CN202221821124.2U CN202221821124U CN217632519U CN 217632519 U CN217632519 U CN 217632519U CN 202221821124 U CN202221821124 U CN 202221821124U CN 217632519 U CN217632519 U CN 217632519U
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Abstract
The utility model provides a stock that shears that is used for deep tunnel country rock target control, include: the anchor rod exposed section is provided with an external thread, the external thread is provided with a fixing nut, the anchor rod shear-resistant reinforcing section comprises an alloy rod body, a grouting bag, reinforcing ribs, expansion cement and a grouting pipe, the grouting pipe used for injecting the expansion cement into the grouting bag is further arranged between the alloy rod body and the grouting bag, the reinforcing ribs are additionally arranged on the free section of the alloy rod body, the bending resistance of the rod body can be improved, the shear-resistant effect is achieved, the expansion cement is injected into the bag at the free end, expansion confining pressure can be provided for the inner wall of a drill hole by utilizing the characteristic that the expansion cement expands along with the volume of the free end bag, the internal shearing stress of surrounding rocks is counteracted, the shearing stress environment of the surrounding rocks is improved, and the stability of the surrounding rocks in a local shearing zone is improved.
Description
Technical Field
The utility model belongs to the technical field of engineering rock mass technique and specifically relates to an stock that shears for deep tunnel country rock target control.
Background
Under the deep mining condition, the roadway surrounding rock is more obviously tensioned, sheared and broken and continuously deformed under the influence of high ground stress. Deep tunnel surrounding rock is influenced by factors such as ground stress, geological structure and engineering disturbance, a large number of potential shearing slip planes exist inside the deep tunnel surrounding rock, shearing dislocation of the surrounding rock easily occurs at the positions, so that the whole tunnel is deformed and damaged, and safety production of a mine is seriously influenced. At present, bolting is widely used as a main bolting means of a mine tunnel, but few bolting bolts are used for shear slip control of surrounding rocks, so that the bolting effect of the tunnel is seriously influenced, and the development and utilization of deep resources are hindered.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above-mentioned problem, a stock that shears for deep tunnel country rock target control is provided. In order to solve the technical problem, the utility model discloses a following technical scheme:
a shear anchor rod for targeted control of deep roadway surrounding rock, comprising: the anchor rod shear-resistant reinforcing section comprises an alloy rod body, a grouting bag, reinforcing ribs, expansion cement and a grouting pipe, wherein the grouting bag is sleeved outside the alloy rod body and comprises a bag upper seal and a bag lower seal, the reinforcing ribs are arranged between the alloy rod body and the grouting bag and on the outer side surface of the alloy rod body, the expansion cement is filled between the alloy rod body and the grouting bag, and the grouting pipe used for filling the expansion cement into the grouting bag is further arranged between the alloy rod body and the grouting bag.
Furthermore, a tray is arranged below the fixing nut.
Further, the stock anchor section includes the alloy screw thread body of rod, the alloy screw thread body of rod sets up the lower extreme at the alloy body of rod.
Further, the upper seal of the bag and the lower seal of the bag are fixed through steel wires.
The utility model discloses owing to adopted above technical scheme, have apparent technological effect: (1) The utility model discloses a through innovative transformation stock structure, with the help of the inflation effect of inflation cement, improved the shear stress environment of the stock body, for reinforcing tunnel country rock stability, promotion supporting effect and reduce the tunnel and reprocess the number of times and provide new stock equipment. (2) The reinforcing ribs are arranged on the rod body, so that the section structure of the anchor rod is changed, the bending resistance and the shearing resistance of the anchor rod are improved directionally, and a special anchor rod is provided for controlling the slippage instability of the surrounding rock of the roadway and realizing the target control.
Drawings
Fig. 1 is a schematic structural view of a shear anchor rod for deep roadway surrounding rock target control in the present invention;
fig. 2 is the utility model discloses in be used for deep tunnel country rock target control's anti stock target installation flow chart.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, connected through an intermediate medium, or connected to the inside of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
As shown in fig. 1-2, the utility model provides an anchor rod that shears for deep tunnel country rock target control includes: the anchor rod comprises an anchor rod exposed section, an anchor rod shearing-resistant reinforcing section and an anchor rod anchoring section, wherein an external thread is arranged on the anchor rod exposed section, a fixing nut 1 is arranged on the external thread, a tray 2 is arranged below the fixing nut 1, the anchor rod shearing-resistant reinforcing section comprises an alloy rod body 7, a grouting bag 4, reinforcing ribs 6, expansion cement and a grouting pipe 9, the grouting bag 4 is sleeved outside the alloy rod body 7, the grouting bag 4 comprises a bag upper seal 3 and a bag lower seal 10, the reinforcing ribs 6 are arranged between the alloy rod body 7 and the grouting bag 4 and on the outer side surface of the alloy rod body 7, the expansion cement 5 is filled between the alloy rod body 7 and the grouting bag 4, the grouting pipe 9 used for filling the expansion cement 5 into the grouting bag 4 is further arranged between the alloy rod body 7 and the grouting bag 4, the anchor rod anchoring section comprises an alloy threaded rod body 11, and the alloy threaded rod body 11 is arranged at the lower end of the alloy rod body 7.
As a preferred embodiment, the shear anchor rod for deep roadway surrounding rock target control in the utility model has a specific structure that, firstly, the overall length of the anchor rod is 2400mm, including a middle shear reinforcement section of 2000mm, an exposed section of 150mm and an anchoring section of 250mm, and the rod body diameter D =22mm; the exposed section is provided with 145mm threads from the end part to the middle part of the rod body and is used for matching with a steel wire to seal the winding diameter of the bag and installing a tray and a fixing nut; 245mm threads are reserved from the end part to the middle part of the rod body of the anchoring section and are used for sealing the winding diameter of the bag in a matched mode, meanwhile, the contact area of the rod body and the anchoring agent in the resin cartridge is enlarged, and anchoring strength is improved; four reinforcing ribs with the size of 4mm multiplied by 2000mm are additionally arranged on a 2000mm shear-resistant reinforcing section in the middle of the anchor rod in a cross-shaped mode, the bending resistance of the anchor rod is improved from two directions, and an elastic bag is sleeved outside the anchor rod and is used for injecting expansion cement to improve the shear stress environment of surrounding rocks. The grouting pipe is 2100mm long, the pipe opening is fixed to the inner side of the sealing position of the anchoring section bag, the other end of the grouting pipe penetrates through the sealing position of the exposing section bag and is connected with the grouting pump, the exhaust short pipe is 200mm long and is fixed to the sealing position of the exposing section bag, and air pressure inside and outside the bag is balanced.
The utility model provides an application method of stock that shears for deep tunnel country rock target control as follows:
(1) Firstly, mastering main geological structures (including faults, folds, collapse columns and the like) and mining conditions around a roadway according to geological and mining data;
(2) And (3) obtaining the stress parameters (including three main stress directions and magnitudes) of the positions of the surrounding rocks of the roadway through field test by a stress relief method, and judging the positions of the potential shearing slip planes of the surrounding rocks and the expansion directions of the potential shearing slip planes of the surrounding rocks by combining the section shape of the roadway and the properties of the surrounding rocks.
(3) Drilling a D =33mm drilled hole in the surrounding rock of the roadway along the direction perpendicular to the potential shear slip plane by using an MQT-120 pneumatic jumbolter, and cleaning the coal dust and rock debris in the hole;
(4) Fixing a grouting pipe on the anchoring section of the rod body by using a steel wire, sleeving a bag on the alloy rod body and the grouting pipe, and sealing the opening of the bag of the anchoring section by using the steel wire along a thread winding diameter, wherein the sealing position keeps a distance of 10-20mm from the end part of the reinforcing rib of the anchor rod, so that the tearing and the damage of the bag structure caused by the too short distance between the sealing position and the reinforcing rib are avoided in the process of pushing the anchor rod into the drilled hole;
(5) Checking and pushing 3 CK2350 epoxy resin anchoring agent cartridges (each having a length of 30 mm) into the hole, wiping off anchoring section water, coal dust and the like by cotton yarn, slowly pushing the anchor rod sleeved with the bag into the drilled hole, connecting the tail of the anchor rod with an MJ60 pneumatic anchor rod installing machine, slowly pushing the resin cartridges into the hole bottom, starting up a pneumatic machine to drive the anchor rod to push while stirring until the anchor rod is pushed to the hole bottom. In the period, the external bag, the grouting pipe and the anchor rod are controlled to be synchronously and smoothly pushed, so that the problems of hole blockage or bag fracture, grouting pipe falling and the like caused by bag structure stacking are avoided;
(6) Slowly rotating the rod body of the anchor rod, adjusting the direction of the reinforcing rib to be parallel to the expansion direction of the potential shearing slip surface, standing for 2min to wait for the initial setting of the epoxy resin anchoring agent, and initially forming anchoring force on the anchor rod at the anchoring section;
(7) Inserting an exhaust short pipe into the inner side of the bag opening of the exposed section, fixing the grouting pipe and the exhaust short pipe, and sealing the bag opening of the exposed section of the anchor rod by using a steel wire in a diameter winding manner;
(8) Injecting the mixed expansion cement into the bag by a grouting pipe, and stopping grouting until the reserved exhaust short pipe continuously stops flowing out of the slurry;
(9) And sealing the grouting pipe and the exhaust pipe by using a steel wire in a diameter winding manner, and simultaneously carrying out secondary reinforcing and sealing on the bag.
(10) And (4) additionally arranging a tray and a nut on the anchor rod at the exposed section, adjusting the pre-tightening torque to be not less than 400 N.m and not more than 550 N.m, and finishing the installation.
The utility model discloses an anchor that shears for deep tunnel country rock target control in the patent through addding the strengthening rib to the alloy rod body free section, thereby can improve the bending resistance of the body of rod and reach the effect of shearing. Through injecting into expansion cement in free end sack inside, can utilize expansion cement to provide the inflation confined pressure to the drilling inner wall at any time the volume expanded characteristic of body, offset the partial shear stress in the country rock, improve the country rock shear stress environment, improve the stability of local shear zone country rock, through ground stress parameter and geological data, judge the potential shear slip plane position of country rock and extending direction, through laying the target stock along the potential slip plane direction of perpendicular country rock, it is parallel with potential shear slip plane extending direction to adjust stock strengthening rib direction simultaneously, promote the bending resistance and the shearing action of stock, realize the target control to deep tunnel country rock.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features of the embodiments described above are not described, but should be considered as within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (4)
1. A stock that shears for deep tunnel country rock target control which characterized in that includes: the anchor rod comprises an anchor rod exposed section, an anchor rod shearing-resistant reinforcing section and an anchor rod anchoring section, wherein external threads are arranged on the anchor rod exposed section, a fixing nut is arranged on the external threads, the anchor rod shearing-resistant reinforcing section comprises an alloy rod body, a grouting bag, reinforcing ribs, expansion cement and a grouting pipe, the grouting bag is sleeved outside the alloy rod body and comprises a bag upper seal and a bag lower seal, the reinforcing ribs are arranged between the alloy rod body and the grouting bag and on the outer side surface of the alloy rod body, the expansion cement is filled between the alloy rod body and the grouting bag, and the grouting pipe used for filling the expansion cement into the grouting bag is further arranged between the alloy rod body and the grouting bag.
2. A shear bolt for deep roadway surrounding rock target control according to claim 1, wherein: and a tray is arranged below the fixing nut.
3. A shear bolt for deep roadway surrounding rock target control according to claim 1, wherein: the anchor rod anchoring section comprises an alloy threaded rod body, and the alloy threaded rod body is arranged at the lower end of the alloy rod body.
4. A shear bolt for deep roadway surrounding rock target control according to claim 1, wherein: the upper seal of the bag and the lower seal of the bag are fixed through steel wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221821124.2U CN217632519U (en) | 2022-07-14 | 2022-07-14 | Shear-resistant anchor rod for deep roadway surrounding rock targeted control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221821124.2U CN217632519U (en) | 2022-07-14 | 2022-07-14 | Shear-resistant anchor rod for deep roadway surrounding rock targeted control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217632519U true CN217632519U (en) | 2022-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221821124.2U Active CN217632519U (en) | 2022-07-14 | 2022-07-14 | Shear-resistant anchor rod for deep roadway surrounding rock targeted control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217632519U (en) |
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2022
- 2022-07-14 CN CN202221821124.2U patent/CN217632519U/en active Active
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