A weak and broken surrounding rock anchoring hole repairing and strengthening device and a repairing method

Abstract

The present application belongs to the field of roadway (tunnel) support, and particularly relates to a soft and broken surrounding rock anchoring hole repairing and reinforcing device and a repairing method. The repairing and reinforcing device comprises a plugging sleeve and a stirring device. The outer wall of the plugging sleeve is provided with a plurality of anchoring agent smearing ribs at intervals. The upper part of the stirring device is provided with anchoring agent stirring ribs, and the surrounding middle part is provided with a flow guide cone. The device has simple manufacturing process, easy construction and low cost, and can effectively ensure the anchoring length and improve the anchoring quality without causing the loss of anchoring agent. The repairing method using the device is an innovation in the anchoring rod (cable) construction process. The anchoring agent is first pushed to the hole bottom, and then the anchoring agent sealing bag is broken and mixed while plugging. Then, the anchoring agent is filled into the hole gap through extrusion smearing under the action of high-speed rotation centrifugation. Finally, the combination moves at the hole gap, and the hole wall cracks can be fully and effectively filled, repaired and reinforced, which has good construction efficiency and economic benefits.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of roadway (tunnel) support, and particularly relates to a soft and broken surrounding rock anchoring hole repairing and reinforcing device and a repairing method. BACKGROUND

[0002] The soft and broken surrounding rock roadway is widely distributed in China, and has the characteristics of low strength, poor completeness and developed fissures. The stability control and support quality of the surrounding rock have become an important factor affecting the mechanization and intelligent rapid development of the roadway excavation. As an important means for controlling the surrounding rock of the roadway, the anchoring agent is stirred in the initial stage, and the resin with high fluidity will quickly flow into the fissures of the anchoring hole wall under the action of the anchor rod, which seriously shortens the anchoring length and affects the anchoring effect. Therefore, the application provides a soft and broken surrounding rock anchoring hole repairing method, which can repair and reinforce the broken hole wall fissures, reduce the number and opening degree of the fissures, block the resin loss channel and prevent the resin loss, so as to improve the anchoring quality. SUMMARY

[0003] In order to solve the above problems, the application adopts the following technical scheme: in the first aspect, the application provides a soft and broken surrounding rock anchoring hole repairing and reinforcing device, which comprises an anchoring agent cavity and an anchoring agent stirring device. The inside of the anchoring agent cavity is an anchoring agent mounting hole for placing the anchoring agent. The front end of the anchoring agent cavity is a plugging blade. The main body of the anchoring agent cavity is a plugging sleeve, which plays a limiting role on the anchoring agent. A plurality of anchoring agent smearing ribs are distributed on the outer wall of the plugging sleeve at intervals. The gap between adjacent anchoring agent smearing ribs forms an anchoring agent outflow hole. A stirring device fixing hole is formed in the lower end of the plugging sleeve. A plurality of anchoring agent stirring ribs are annularly distributed on the upper part of the anchoring agent stirring device. A flow guide cone is arranged at the middle part surrounded by the plurality of anchoring agent stirring ribs. Anchoring agent crushing teeth are arranged at the upper end of each anchoring agent stirring rib. A limiting device is arranged at the lower end of the anchoring agent stirring device. A drill rod mounting hole is formed in the inside of the limiting device.

[0004] Further, the inner diameter of the anchoring agent mounting hole matches the outer diameter of the anchoring agent.

[0005] Further, the inner wall of the anchoring agent smearing rib is treated to prevent slipping.

[0006] Further, the stirring device fixing hole is a horn shape with an opening facing the anchoring hole, and the limiting device is a wedge shape matching the stirring device fixing hole.

[0007] Further, the outer wall of the flow guide cone is closely combined with the inner wall of the anchoring agent stirring rib, and the flow guide cone is located at the lower side of the anchoring agent crushing teeth.

[0008] Further, the length of the anchoring agent stirring rib matches the length of the anchoring agent smearing rib.

[0009] In a second aspect, the present application provides a repairing method of the repairing and reinforcing device for the anchoring hole in soft and broken surrounding rock, which comprises the following steps:

[0010] Step 1): The anchoring hole is drilled by the mechanical equipment matched with the anchor rod (cable), and then a certain length of anchoring agent is placed in the anchoring agent installation hole of the anchoring agent cavity after the anchoring hole construction is completed;

[0011] Step 2): The drill rod is connected with the drill rod installation hole of the anchoring agent stirring device, and the drill rod is pushed to the bottom of the anchoring hole by the drill rig;

[0012] Step 3): The drill rod is driven to advance and rotate by the drill rig, so that the anchoring agent stirring device is inserted into the inside of the anchoring agent, at this time, the anchoring agent crushing teeth quickly crush the bag of the anchoring agent, so that the anchoring agent flows into the inside of the anchoring agent cavity, and at the same time, the rotating anchoring agent stirring rib begins to stir the anchoring agent, and the stirred and mixed anchoring agent flows out from the anchoring agent flow-out hole to the narrow space between the anchoring agent cavity and the hole wall of the anchoring hole under the pushing of the flow cone;

[0013] Step 4): When the anchoring agent stirring device enters the anchoring agent cavity to a certain depth, the limiting device is inserted into the stirring device fixing hole of the plugging sleeve, and under the pushing force of the drill rod, the anchoring agent cavity, the anchoring agent stirring device and the drill rod finally form an integral structure, the drill rod begins to drive the plugging sleeve to rotate quickly and move to the hole opening direction, and with the continuous retreat of the drill rod, the hole wall fracture is filled, repaired and reinforced.

[0014] Further, the anchoring agent in the anchoring agent cavity continuously flows into the space between the anchoring agent cavity and the hole wall under the action of centrifugal force, and at the same time, the anchoring agent in the space is continuously extruded into the hole wall fracture by the anchoring agent smearing rib because the plugging blade of the anchoring agent cavity and the plugging sleeve and the hole wall of the anchoring hole form a closed space.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] 1. The anchoring agent smearing rib is used in the repairing and reinforcing device, which can not only clamp the anchoring agent in the unbroken bag and push it to the bottom of the hole, but also quickly smear the broken anchoring agent flowing into the space between the anchoring agent cavity and the hole wall under the action of high-speed centrifugal force, and continuously extrude it into the hole wall fracture, so that the hole wall fracture is effectively filled, repaired and reinforced, and the anchoring quality is greatly improved.

[0017] 2、The anchor agent stirring device adopts a plurality of anchor agent stirring ribs around and a flow guide cone around the middle part, the upper end of the anchor agent stirring rib is provided with anchor agent crushing teeth, the anchor agent is crushed by the anchor agent crushing teeth, the anchor agent stirring rib rapidly stirs and mixes the anchor agent under the rotation and propulsion of the drilling machine, the anchoring effect is improved, in addition, the flow guide cone not only plays a flow guiding role on the crushed anchor agent, but also greatly improves the centrifugal working efficiency of the high-speed rotation of the anchor agent into the narrow space between the anchor agent cavity and the anchor hole wall.

[0018] 3、The device has simple manufacturing process, easy construction and low cost, does not cause anchor agent loss, can effectively ensure the anchoring length, and improves the anchoring quality; the repairing method using the device is an innovation in anchor rod (cable) construction process, the anchor agent is pushed to the hole bottom, the anchor agent bag is crushed and mixed while being plugged, then high-speed rotation centrifugal force is applied to the anchor agent, and the anchor agent is filled into the hole gap through extrusion and smearing, finally the combination moves at the hole gap, the hole wall crack can be fully and effectively filled, repaired and reinforced, the anchoring quality is efficiently improved, and good construction efficiency and economic benefits are obtained. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings of the specification of the present application are used to provide further understanding of the present application, the schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application.

[0020] Figure 1 It is a structural schematic view of the soft and broken surrounding rock anchor hole repairing and reinforcing device.

[0021] Figure 2 It is a structural schematic view of the anchor agent cavity.

[0022] Figure 3 It is a sectional view of the anchor agent cavity.

[0023] Figure 4 It is a structural schematic view of the anchor agent stirring device.

[0024] Figure 5 It is a sectional view of the anchor agent stirring device.

[0025] Wherein, 1, drill rod; 2, anchor hole; 3, anchor agent; 4, plugging blade; 5, anchor agent mounting hole; 6, anchor agent outflow hole; 7, anchor agent smearing rib; 8, plugging sleeve; 9, stirring device fixing hole; 10, anchor agent crushing tooth; 11, flow guide cone; 12, anchor agent stirring rib; 13, limiting device; 14, drill rod mounting hole. DETAILED DESCRIPTION

[0026] The present application will be further described below in combination with the drawings and embodiments.

[0027] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all 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 pertains.

[0028] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0029] Example 1:

[0030] like Figures 1-5 As shown, this embodiment provides a device for repairing and strengthening anchor holes in weak and fractured surrounding rock, including an anchoring agent cavity and an anchoring agent mixing device. The interior of the anchoring agent cavity is an anchoring agent installation hole 5 for placing the anchoring agent 3. The front end of the anchoring agent cavity is a sealing blade 4 to prevent the anchoring agent 3 from moving out of the anchoring agent cavity. The main body of the anchoring agent cavity is a sealing sleeve 8, which limits the anchoring agent 3. Several anchoring agent application ribs 7 are distributed at intervals on the outer wall of the sealing sleeve 8. When the flowing anchoring agent 3 flows into the narrow space between the anchoring agent cavity and the hole wall 2, the rotating anchoring agent application ribs 7 can better apply the anchoring agent 3 into the cracks in the hole wall 2. The gaps between adjacent anchoring agent application ribs 7 form anchoring agent outflow holes 6. To facilitate the outflow of the anchoring agent 3 from the broken bag, the lower end of the sealing sleeve 8 is provided with a stirring device fixing hole 9 for connecting the stirring device to form a rotating unit. The upper part of the anchoring agent stirring device is provided with several anchoring agent stirring ribs 12 arranged in a ring. A flow guide cone 11 is provided in the middle of the several anchoring agent stirring ribs 12, which plays a role in guiding the flow of anchoring agent 3, and can improve the flow efficiency and reduce the energy consumption of the drilling rig. Each anchoring agent stirring rib 12 is provided with an anchoring agent breaking tooth 10 at its upper end. The lower end of the anchoring agent stirring device is provided with a limiting device 13. The limiting device 13 is used to connect with the stirring device fixing hole 9 of the anchoring agent cavity to seal the anchoring agent 3. The inside of the limiting device 13 is provided with a drill rod mounting hole 14 for installing the drill rod 1.

[0031] Furthermore, the inner diameter of the anchor installation hole 5 matches the outer diameter of the anchor 3, which facilitates the installation of a certain length of anchor 3. When the outer diameter of the anchor 3 is too small than the inner diameter of the anchor installation hole 5, the anchor 3 that has not been broken is prone to moving downwards during the process of being pushed into the bottom of the anchor hole 2, which is not conducive to advancement.

[0032] For better effect, the inner wall of the anchoring agent smearing rib 7 is treated to prevent slipping, increasing the friction between the unbroken bag anchoring agent 3 and the anchoring agent smearing rib 7, facilitating the unbroken bag anchoring agent 3 to be connected with the anchoring agent cavity and pushed into the anchoring hole 2 bottom.

[0033] For better effect, the stirring device fixing hole 9 is trumpet-shaped with the opening facing the anchoring hole, and the limiting device 13 is wedge-shaped matching the stirring device fixing hole 9. The limiting device 13 is inserted into the stirring device fixing hole 9 with the rotation and advancement of the anchoring agent stirring device, thereby blocking the broken bag anchoring agent 3 from below, preventing downward loss and affecting the anchoring effect.

[0034] For better effect, the outer wall of the flow guide cone 11 is closely matched with the inner wall of the anchoring agent stirring rib 12, avoiding the waste of the broken bag anchoring agent 3 flowing into the space between the flow guide cone 11 and the anchoring agent stirring rib 12. The flow guide cone 11 is located below the anchoring agent crushing tooth 10. When the anchoring agent stirring device is connected with the anchoring agent cavity and rotates at high speed, the flow guide cone 11 plays a role in guiding the fluid anchoring agent 3, and improves the efficiency of centrifugal motion, so that the anchoring agent 3 flows into the space between the anchoring agent cavity and the hole wall more quickly.

[0035] For better effect, the length of the anchoring agent stirring rib 12 matches the length of the anchoring agent smearing rib 7. If the length of the anchoring agent stirring rib 12 is greater than the length of the anchoring agent smearing rib 7, the limiting device 13 cannot be inserted into the stirring device fixing hole 9, thereby failing to achieve downward blocking of the broken bag anchoring agent 3. If the length of the anchoring agent stirring rib 12 is too small than the length of the anchoring agent smearing rib 7, it is not conducive to quickly breaking and stirring the unbroken bag anchoring agent 3, affecting the anchoring effect.

[0036] Example two

[0037] The repair method of the soft and broken surrounding rock anchoring hole repair and reinforcement device disclosed in the application comprises any one of the soft and broken surrounding rock anchoring hole repair and reinforcement devices described in example 1, and specifically comprises the following steps:

[0038] Step 1): use the mechanical equipment matched with the anchor rod (cable) to dig the anchoring hole 2, and place the anchoring agent 3 with a certain length in the anchoring agent installation hole 5 of the anchoring agent cavity after the construction of the anchoring hole 2 is completed; wherein the length of the anchoring agent 3 is adapted to the amount of anchoring agent required for repairing the hole wall fracture and the diameter of the anchoring hole 2.

[0039] Step 2): connecting the drill pipe 1 with the drill pipe installation hole 14 of the anchoring agent stirring device, pushing the formed combination to the hole bottom of the anchoring hole 2 by the drilling machine; wherein, here, the pushing is only pushing the combination by the drilling machine without rotation, so that the surface of the unbroken anchoring agent 3 can bear the pushing force of the anchoring agent crushing tooth 10 at the front end of the anchoring agent stirring device, and can reach the hole bottom of the anchoring hole 2;

[0040] Step 3): the drilling machine drives the drill pipe 1 to continue advancing and rotating, so that the anchoring agent stirring device is inserted into the inside of the anchoring agent 3, at this time, the anchoring agent crushing tooth 10 quickly breaks the bag of the anchoring agent 3, so that the anchoring agent 3 flows into the inside of the anchoring agent cavity, and the rotating anchoring agent stirring rib 12 begins to stir and mix the anchoring agent 3, and the stirred and mixed anchoring agent 3 is pushed by the flow guide cone 11 and flows out to the narrow space between the anchoring agent cavity and the hole wall of the anchoring hole 2 through the anchoring agent outflow hole 6;

[0041] Step 4): when the anchoring agent stirring device enters the anchoring agent cavity to a certain depth, the limiting device 13 is inserted into the stirring device fixing hole 9 of the plugging sleeve 8, under the action of the pushing force of the drill pipe 1, finally forming an integral structure of the anchoring agent cavity, the anchoring agent stirring device and the drill pipe 1, the drill pipe 1 starts to drive the plugging sleeve 8 to rotate quickly and move to the hole opening direction, with the continuous retreat of the drill pipe 1, the hole wall crack is filled, repaired and strengthened, at this time, the high-speed rotating anchoring agent stirring rib 12 will quickly smear the anchoring agent 3 flowing into the narrow space between the anchoring agent cavity and the hole wall of the anchoring hole, greatly improving the efficiency of smearing into the hole wall crack, in addition, according to the size of the crack and the repair requirement, the integral structure can also be driven to move back and forth at the position where the crack is larger, improving the repair effect.

[0042] Further, the anchoring agent 3 in the anchoring agent cavity continuously flows into the space between the anchoring agent cavity and the hole wall under the action of centrifugal force, and at the same time, the anchoring agent 3 in the space is continuously extruded into the hole wall crack by the anchoring agent smearing rib 7, since the plugging blade 4 of the anchoring agent cavity and the plugging sleeve 8 and the hole wall of the anchoring hole 2 form a closed space, with the continuous retreat of the drill pipe 1, the hole wall crack can be effectively filled, repaired and strengthened, thereby improving the anchoring quality.

[0043] The anchor agent smearing device of the present application adopts a plurality of anchor agent smearing ribs and a flow guide cone body around the middle part, the upper end of the anchor agent smearing rib is provided with anchor agent breaking teeth, the anchor agent is broken by the anchor agent breaking teeth, and the anchor agent smearing rib smears and mixes the anchor agent quickly under the rotation and advancement of the drilling machine, thereby improving the anchoring effect; in addition, the flow guide cone body not only guides the flow of the broken anchor agent, but also greatly improves the centrifugal working efficiency of the anchor agent flowing from the anchor agent outflow hole to the narrow space between the anchor agent cavity and the anchor hole wall under high-speed rotation; the device of the present application has simple manufacturing process, easy construction and low cost, and can effectively ensure the anchoring length and improve the anchoring quality; in addition, the repair method using the device is an innovation in the anchor rod (cable) construction process, the anchor agent is pushed to the hole bottom, the anchor agent sealing bag is broken and mixed while plugging, then high-speed rotation and centrifugal effect are applied to the anchor agent, and the anchor agent is filled into the hole gap by extrusion smearing, finally the combination moves in the hole gap, the hole wall crack can be fully and effectively filled, repaired and strengthened, the anchoring quality is efficiently improved, and good construction efficiency and economic benefit are obtained.

[0044] Although the specific embodiments of the present application are described above in combination with the drawings, the description is not a limitation on the scope of protection of the present application, and those skilled in the art should understand that various modifications or changes made by those skilled in the art on the basis of the technical solutions of the present application without creative labor are still within the scope of protection of the present application.

Claims

1. A device for repairing and reinforcing anchor holes in weak and fractured surrounding rock, characterized in that: The device includes an anchoring agent cavity and an anchoring agent mixing device. The interior of the anchoring agent cavity has an anchoring agent installation hole for placing the anchoring agent. The front end of the anchoring agent cavity is a sealing blade. The main body of the anchoring agent cavity is a sealing sleeve, which limits the anchoring agent. Several anchoring agent application ribs are distributed at intervals on the outer wall of the sealing sleeve. The gap between adjacent anchoring agent application ribs forms an anchoring agent outflow hole. The lower end of the sealing sleeve has a fixing hole for the mixing device. Several anchoring agent mixing ribs are distributed in a ring on the upper part of the anchoring agent mixing device. A guide cone is set in the middle of the several anchoring agent mixing ribs. An anchoring agent breaking tooth is set at the upper end of each anchoring agent mixing rib. A limit device is set at the lower end of the anchoring agent mixing device. A drill rod installation hole is set inside the limit device. The repair method using anchor holes in weak and fractured surrounding rock to repair and strengthen the device includes the following steps: Step 1): Use the mechanical equipment that matches the anchor bolt or anchor cable to drill the anchor hole. After the anchor hole construction is completed, place a certain length of anchoring agent into the anchoring agent installation hole of the anchoring agent cavity. Step 2): Connect the drill rod to the drill rod mounting hole of the anchoring agent mixing device, and use the drilling machine to push the formed assembly to the bottom of the anchoring agent cavity. Step 3): The drilling rig drives the drill rod forward and rotates, causing the anchoring agent mixing device to be inserted into the interior of the anchoring agent. At this time, the anchoring agent crushing teeth quickly break the sealing bag of the anchoring agent, allowing the anchoring agent to flow into the interior of the anchoring agent cavity. At the same time, the rotating anchoring agent mixing ribs begin to mix the anchoring agent. The mixed anchoring agent, pushed by the guide cone, flows out from the anchoring agent outlet hole into the narrow space between the anchoring agent cavity and the hole wall of the anchoring hole. Step 4): After the anchoring agent mixing device enters the anchoring agent cavity to a certain depth, the limiting device is inserted into the fixing hole of the mixing device of the sealing sleeve. Under the thrust of the drill rod, the anchoring agent cavity, the anchoring agent mixing device and the drill rod are finally formed into an integral structure. The drill rod begins to drive the sealing sleeve to rotate rapidly and move towards the hole opening. As the drill rod continues to retreat, the cracks in the hole wall are filled, repaired and strengthened. Under the action of centrifugal force, the anchoring agent inside the anchoring agent cavity continuously flows into the space between the anchoring agent cavity and the hole wall. At the same time, since the sealing blades and sealing sleeves of the anchoring agent cavity and the hole wall of the anchoring hole form a closed space, the anchoring agent in this space is continuously squeezed into the cracks in the hole wall by the anchoring agent coating ribs.

2. The device for repairing and reinforcing anchor holes in weak and fractured surrounding rock as described in claim 1, characterized in that: The inner diameter of the anchoring hole matches the outer diameter of the anchoring agent.

3. The device for repairing and reinforcing anchor holes in weak and fractured surrounding rock as described in claim 2, characterized in that: Anchoring agent is applied to the inner wall of the ribs for anti-slip treatment.

4. The device for repairing and reinforcing anchor holes in weak and fractured surrounding rock as described in claim 1, characterized in that: The fixing hole of the stirring device is funnel-shaped with its opening facing the anchor hole, and the limiting device is wedge-shaped and matches the fixing hole of the stirring device.

5. The device for repairing and reinforcing anchor holes in weak and fractured surrounding rock as described in claim 1, characterized in that: The outer wall of the guide cone is in close contact with the inner wall of the anchoring agent mixing rib, and the guide cone is located below the anchoring agent breaking teeth.

6. The device for repairing and reinforcing anchor holes in weak and fractured surrounding rock as described in claim 1, characterized in that: The length of the anchoring agent mixing rib is matched with the length of the anchoring agent application rib.

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