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CN-224228698-U - High-stress weak rock stratum anchor bolt supporting device

CN224228698UCN 224228698 UCN224228698 UCN 224228698UCN-224228698-U

Abstract

The utility model relates to the technical field of anchor bolt supporting equipment, in particular to a high-stress weak rock stratum anchor bolt supporting device. The technical scheme includes that the outer fixing piece and the inner fixing piece are sleeved in the outer fixing piece, the outer fixing piece comprises an outer sleeve rod, the bottom of the outer sleeve rod is rotationally connected with a plurality of auxiliary supporting rods, the top of the outer sleeve rod is fixedly connected with a rotating disc, the inner fixing piece comprises an inner rod which is rotationally connected with the inner wall of the outer sleeve rod through threads, a fixing clamping ring is fixedly sleeved on the outer ring at the bottom end of the inner rod, a plurality of fixing blocks are connected with the lower portion of the fixing clamping ring along the outer ring array of the fixing clamping ring, a fixing rod is arranged between two adjacent fixing blocks, and an anchoring connecting disc is sleeved on the outer ring at the top end of the outer sleeve rod. The utility model can promote the anchoring force, the mechanical engagement of the inverted wedge blocks can provide the initial anchoring force, the stability of the anchor rod is enhanced in all directions, the anchor rod is suitable for high-stress weak rock stratum, the engineering safety is ensured, and the maintenance cost is reduced.

Inventors

  • LUO CHAO
  • Pu Fazhi
  • Tan Yanmen
  • ZHOU XIANG
  • LAI XIANLIN

Assignees

  • 贵州政立矿业有限公司

Dates

Publication Date
20260512
Application Date
20250513

Claims (8)

  1. 1. The high-stress weak rock stratum anchor rod supporting device is characterized by comprising an outer fixing piece (1) and an inner fixing piece (2), wherein the inner fixing piece (2) is sleeved in the outer fixing piece (1); The outer fixing piece (1) comprises an outer sleeve rod (11), a plurality of auxiliary supporting rods (17) are rotatably connected to the bottom of the outer sleeve rod (11), and a rotating disc (15) is fixedly connected to the top of the outer sleeve rod (11); The inner fixing piece (2) comprises an inner rod (21) in threaded rotation connection with the inner wall of the outer sleeve rod (11), a fixing clamping ring (25) is fixedly sleeved on the outer ring of the bottom end of the inner rod (21), a plurality of fixing blocks (26) are connected below the fixing clamping ring (25) along the outer ring array of the fixing clamping ring, and a fixing rod (27) is arranged between two adjacent fixing blocks (26); an anchoring connecting disc (3) is sleeved and connected with the outer ring at the top end of the outer sleeve rod (11).
  2. 2. The high-stress weak rock anchor support device according to claim 1, wherein a plurality of annular ribs (13) are arranged on the outer ring of the outer sleeve rod (11), and stress release grooves (12) are further formed on the outer ring of the outer sleeve rod (11).
  3. 3. A high stress weak rock anchor support device according to claim 1, wherein the auxiliary struts (17) are provided with guide openings (170) along their length, each set of fixing rods (27) being arranged in correspondence of one guide opening (170).
  4. 4. The high-stress weak rock anchor support device according to claim 1, wherein the cross section of the fixing clamp ring (25) is in a right trapezoid structure, and the outer diameter of the bottom ring of the fixing clamp ring (25) is larger than that of the top ring of the fixing clamp ring.
  5. 5. The high-stress weak rock anchor supporting device according to claim 1, wherein the top of the outer sleeve rod (11) is connected with the rotating disc (15) through a fixedly connected connecting frame (14), a grouting cavity (210) is formed in the inner rod (21), and a plurality of diversion channels (211) penetrating through the bottom end of the inner rod (21) are communicated with the bottom of the grouting cavity (210).
  6. 6. The high-stress weak rock anchor support device according to claim 5, wherein the rotating disc (15) is provided with a grouting opening (150) corresponding to the grouting cavity (210), the connecting frame (14) is provided with a first connecting hole (16), the inner rod (21) is provided with a plurality of limiting holes (23) along the height direction, and the limiting holes (23) and the first connecting holes (16) are correspondingly provided with bolts (24) in a rotating mode.
  7. 7. A high stress weak rock anchor support device according to claim 1, characterized in that the outer ring of the upper half of the inner rod (21) is further provided with a thread groove (22) adapted to the inner wall of the outer sleeve rod (11).
  8. 8. A high stress weak rock anchor support device according to claim 1, characterized in that the anchor connection disc (3) comprises a mounting hole (31) and a plurality of second connection holes (32).

Description

High-stress weak rock stratum anchor bolt supporting device Technical Field The utility model relates to the technical field of anchor bolt supporting equipment, in particular to a high-stress weak rock stratum anchor bolt supporting device. Background In the field of underground engineering, such as mining, tunneling and other operations, the support of highly stressed weak rock formations has been a critical and troublesome problem. The high-stress weak rock stratum is extremely easy to generate obvious plastic deformation under the action of engineering force due to the characteristics of low strength, large porosity, poor cementing degree and the like, and forms serious threat to engineering safety. The anchor bolt support is used as a common reinforcement mode, and is widely applied to various projects by driving a rod column into a rock body and utilizing the interaction of the rod column and surrounding rock to maintain the stability of the rock body. However, existing anchor supports expose a number of drawbacks for the special conditions of highly stressed weak formations where the anchoring forces of existing anchor supports often have difficulty countering significant rock pressures. The anchor rod is mostly dependent on a single anchoring mode, such as an end anchoring type anchor rod, an anchoring point is formed only between the end of the anchor rod and a rock body, and in a high-stress weak rock stratum, the anchoring point is easy to loosen due to surrounding rock body breaking, so that the anchoring force is rapidly reduced, and the deformation and displacement of the rock body cannot be effectively limited. In view of the above, the present application proposes a composite anchor connection anchor bolt support device for high stress weak strata. Disclosure of Invention The utility model aims at solving the problems in the background art and provides a composite anchoring connection type anchor rod supporting device for a high-stress weak rock stratum. The technical scheme of the utility model is that the high-stress weak rock stratum anchor rod supporting device comprises an outer fixing piece and an inner fixing piece, wherein the inner fixing piece is sleeved in the outer fixing piece; the outer fixing piece comprises an outer sleeve rod, the bottom of the outer sleeve rod is rotatably connected with a plurality of auxiliary supporting rods, and the top of the outer sleeve rod is fixedly connected with a rotating disc; The inner fixing piece comprises an inner rod in threaded rotation connection with the inner wall of the outer sleeve rod, a fixing clamping ring is fixedly sleeved on the outer ring at the bottom end of the inner rod, a plurality of fixing blocks are connected below the fixing clamping ring along the outer ring array of the fixing clamping ring, and a fixing rod is arranged between two adjacent fixing blocks; An anchoring connecting disc is sleeved and connected with the outer ring at the top end of the outer sleeve rod. Optionally, the outer ring of the outer sleeve rod is provided with a plurality of annular ribs, and the outer ring of the outer sleeve rod is also provided with a stress release groove. Optionally, the auxiliary supporting rod is provided with a guiding opening along the length direction thereof, and each group of the fixing rods is arranged corresponding to one guiding opening. Optionally, the cross section of the fixed snap ring is of a right trapezoid structure, and the outer diameter of the bottom ring of the fixed snap ring is larger than that of the top ring of the fixed snap ring. Optionally, the top of outer loop bar is connected with the rolling disc through fixed connection's link, set up the slip casting chamber in on the interior pole, the bottom intercommunication in slip casting chamber is provided with a plurality of reposition of redundant personnel passageways that run through interior pole bottom end. Optionally, the grouting opening corresponding to the grouting cavity is formed in the rotating disc, the first connecting hole is formed in the connecting frame, the inner rod is provided with a plurality of limiting holes along the height direction of the inner rod, and bolts are correspondingly arranged in the limiting holes and the first connecting holes in a rotating mode. Optionally, a thread groove matched with the inner wall of the outer sleeve rod is further formed in the outer ring of the upper half section of the inner rod. Optionally, the anchor connection pad includes a mounting hole and a plurality of second connection holes. Compared with the prior art, the utility model has the following beneficial technical effects: according to the utility model, through the arrangement of the inner sleeve rod and the outer sleeve rod, the strength of the anchoring rod is realized, the auxiliary supporting rod is arranged at the contact end of the end part and the rock, and the auxiliary supporting rod is outwards expanded while the inne