Pressure-measurable anti-rockburst anchor rod for mine

Abstract

The utility model belongs to the field of anchor rods, and discloses a mine pressure-measurable rockburst-resistant anchor rod which comprises an anchor rod body, a supporting frame and a joint filling assembly. A hollow cavity is formed in the inner wall of the anchor rod, a supporting frame is fixed to the upper end of the anchor rod, a threaded rod is fixed to the lower end of the supporting frame, a supporting pipe is fixed to the inner side of the hollow cavity, the supporting pipe and the threaded rod are coaxially arranged, and a joint filling assembly is slidably arranged on the inner side of the hollow cavity. An outer supporting frame is arranged at the upper end of the nut seat in a sliding mode, sealing rings are fixed to the lower ends of the inner supporting frame and the outer supporting frame, a first through hole penetrating through the anchor rod is formed in the side wall of the anchor rod, and a second through hole penetrating through the supporting pipe is formed in the inner wall of the supporting pipe. By arranging the joint filling assembly on the inner side of the anchor rod, after the anchor rod is inserted into the surrounding rock, a worker can manufacture the filling agent in the anchor rod under the condition that the anchor rod is not pulled out, and fill the gap between the anchor rod and the surrounding rock with the anchoring agent after rock burst occurs, so that the anchoring force of the anchor rod is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure belongs to the field of anchor rods, and particularly relates to a mine pressure-measurable anti-rock-burst anchor rod. BACKGROUND

[0002] Rock burst is a dynamic phenomenon that the elastic deformation potential energy accumulated in underground rock mass under high ground stress is suddenly released under excavation or other external disturbance, resulting in the burst and ejection of surrounding rock. It is often accompanied by phenomena such as rock ejection, strong vibration, loud noise and air wave, which seriously threatens the construction safety of underground engineering. In rock burst prevention, anchor rods anchor surrounding rock, improve the overall stability of surrounding rock, absorb the energy released by rock burst, and reduce the damage of rock burst to supporting structures and construction personnel.

[0003] However, when rock burst occurs, the impact force generated by the burst of surrounding rock is easy to cause displacement of the anchor rod, at this time, the gap between the anchor rod and the surrounding rock increases, and if not handled in time, the anchoring force of the anchor rod will be easily reduced. CONTENT OF THE UTILITY MODEL

[0004] In view of the deficiencies of the prior art, the purpose of the present disclosure is to provide a mine pressure-measurable anti-rock-burst anchor rod, which solves the problem that the gap between the anchor rod and the surrounding rock increases after the displacement of the anchor rod, and if not handled in time, the anchoring force of the anchor rod will be easily reduced.

[0005] The purpose of the present disclosure can be achieved by the following technical solutions:

[0006] A mine pressure-measurable anti-rock-burst anchor rod comprises an anchor rod, a support frame and a gap-filling assembly.

[0007] The inner wall of the anchor rod is provided with a hollow cavity, and the upper end of the anchor rod is fixed with a support frame. The lower end of the support frame is fixed with a threaded rod. The inner side of the hollow cavity is fixed with a support tube, and the support tube is coaxially arranged with the threaded rod. The inner side of the hollow cavity is slidably provided with a gap-filling assembly.

[0008] The gap-filling assembly comprises a nut seat, an inner support frame, an outer support frame and a sealing ring. The outer side of the threaded rod is threadedly connected with a nut seat, and the lower end of the nut seat is fixed with an inner support frame. The upper end of the nut seat is slidably provided with an outer support frame, and the lower end of the inner support frame and the outer support frame is fixed with a sealing ring. The side wall of the anchor rod is provided with a first through hole penetrating the anchor rod, and the inner wall of the support tube is provided with a second through hole penetrating the support tube.

[0009] In some disclosures, the support frame comprises a left casing, a right casing and a rack. The upper end of the threaded rod is coaxially fixed with a gear, and the outer side of the gear is engaged with two racks. The ends of the two racks away from the gear are respectively fixed with a left casing and a right casing, and the left casing is slidably arranged on the left side of the right casing.

[0010] In some of the disclosure, the left and right shells are arc-shaped and surround the outside of the gear.

[0011] In some of the disclosure, the upper end of the anchor rod is fixed with a fixing seat, the inner side of the fixing seat is provided with a limiting hole penetrating through the fixing seat, and the inner side of the limiting hole is provided with a limiting rod penetrating through the support frame.

[0012] In some of the disclosure, the lower end surface of the fixing seat is rotationally connected with the upper end surface of the gear, and the inner wall of the anchor rod is fixed with a rotating seat.

[0013] In some of the disclosure, the side wall of the outer support frame is fixed with at least one stopper, and the structure of the stopper corresponds to the structure of the first through hole.

[0014] In some of the disclosure, the position of the second through hole is higher than that of the first through hole.

[0015] The nouns, conjunctions or adjectives involved in the above technical solutions are explained as follows:

[0016] Fixed connection refers to the connection of parts or components after being fixed without any relative movement;

[0017] Rotational connection refers to the connection between parts that allows the parts to rotate relative to each other;

[0018] Threaded connection is a kind of detachable fixed connection, which has the advantages of simple structure, reliable connection and convenient assembly and disassembly, and is widely used in mechanical engineering and connection structure field;

[0019] Sliding connection refers to the connection between parts that allows the parts to slide relative to each other.

[0020] The beneficial effects of the disclosure are:

[0021] By arranging the caulking assembly in the inner side of the anchor rod, after the anchor rod is inserted into the surrounding rock, the staff can make the filler in the anchor rod without pulling out the anchor rod, and the anchoring agent is filled in the gap between the anchor rod and the surrounding rock after the rock burst occurs, thereby improving the anchoring force of the anchor rod. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the disclosure or the prior art, the drawings needed in the embodiment or prior art description will be briefly introduced as follows. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0023] Figure 1 is a schematic diagram of the overall structure of the embodiment of the disclosure;

[0024] Figure 2 is a schematic diagram of an explosion structure of an embodiment of the present disclosure;

[0025] Figure 3 is a schematic diagram of an upper view of an embodiment of the present disclosure;

[0026] Figure 4 is a schematic diagram of an A-A isometric cross-sectional structure in a front view of an embodiment of the present disclosure;

[0027] Figure 5 is a schematic diagram of an internal structure of an anchor rod of an embodiment of the present disclosure.

[0028] In the figure: 1, anchor rod; 101, hollow cavity; 102, first through hole; 103, fixing seat; 131, limiting hole; 2, support frame; 21, left cover; 22, right cover; 23, rack; 3, gear; 4, threaded rod; 5, caulking assembly; 51, nut seat; 52, inner support frame; 53, outer support frame; 54, sealing ring; 531, stop block; 6, support pipe; 61, second through hole; 7, limiting rod; 8, rotating seat. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present disclosure.

[0030] According to the concept of the present application, an embodiment of a mine pressure-measurable anti-rock-burst anchor rod is described herein Figures 1 to 5 . Specifically, the mine pressure-measurable anti-rock-burst anchor rod is configured in a split structure, which has three components, i.e., an anchor rod 1, a support frame 2, and a caulking assembly 5. By arranging the caulking assembly 5 inside the anchor rod 1, after the anchor rod 1 is inserted into the surrounding rock, the staff can make a filler inside the anchor rod 1 without pulling out the anchor rod 1, and fill the anchor agent at the gap between the anchor rod 1 and the surrounding rock after a rock burst occurs, thereby improving the anchoring force of the anchor rod 1.

[0031] Please refer to Figures 1 to 5 , a mine pressure-measurable anti-rock-burst anchor rod, comprising an anchor rod 1, a support frame 2, and a caulking assembly 5;

[0032] The inner wall of the anchor rod 1 is provided with a hollow cavity 101, and the upper end of the anchor rod 1 is fixed with the support frame 2, the lower end of the support frame 2 is fixed with the threaded rod 4, the inner side of the hollow cavity 101 is fixed with the support pipe 6, and the support pipe 6 is coaxially arranged with the threaded rod 4, and the inner side of the hollow cavity 101 is slidably provided with the caulking assembly 5;

[0033] The gap filling assembly 5 comprises a nut seat 51, an inner support frame 52, an outer support frame 53 and a sealing ring 54, the nut seat 51 is threadedly connected to the outer side of the threaded rod 4, the lower end of the nut seat 51 is fixed with the inner support frame 52, the upper end of the nut seat 51 is slidably provided with the outer support frame 53, and the lower end of the inner support frame 52 and the outer support frame 53 is fixed with the sealing ring 54, the side wall of the anchor rod 1 is provided with a first through hole 102 penetrating through the anchor rod 1, and the inner wall of the support pipe 6 is provided with a second through hole 61 penetrating through the support pipe 6.

[0034] In use, the hollow cavity 101 is divided into two spaces by the support pipe 6, the bottom end of the threaded rod 4 is rotated by rotating the nut seat 51 before use, at this time, the lower end surface of the inner support frame 52 is in contact with the inner upper end surface of the support pipe 6, and the lower end surface of the sealing ring 54 at the lower end of the outer support frame 53 is in contact with the bottom end of the hollow cavity 101, then the inside of the support pipe 6 is filled with lime powder, and then the space between the outer wall of the support pipe 6 and the inner wall of the anchor rod 1 is filled with water, at this time, the lime powder and water are located at the upper end of the sealing ring 54, when the anchor rod 1 is inserted into the surrounding rock, because the support pipe 6 is located inside the anchor rod 1, when the anchor rod 1 extrudes the surrounding rock outward, the support pipe 6 does not directly contact the anchor rod 1, thereby reducing the deformation of the support pipe 6 during the insertion of the anchor rod 1, then when the surrounding rock deforms, the surrounding rock around the anchor rod 1 extrudes the anchor rod 1 inward, so that the gap between the anchor rod 1 and the surrounding rock increases, the staff can press the support frame 2 inward from the outside, thereby driving the support frame 2 to slide towards the center line of the anchor rod 1, then the threaded rod 4 is rotated clockwise, and the nut seat 51 is slid upward by the thread, because the nut seat 51 is fixedly connected with the inner support frame 52, thereby driving the inner support frame 52 to slide upward along the support pipe 6, before the nut seat 51 contacts the outer support frame 53, the lime powder is driven to flow out of the second through hole 61 into the space between the outer wall of the support pipe 6 and the inner wall of the anchor rod 1 by the sealing ring 54 at the bottom of the inner support frame 52, and mixed with water, as the nut seat 51 continues to move upward and contacts the outer support frame 53, the outer support frame 53 is driven to slide upward, and then the sealing ring 54 at the lower end of the outer support frame 53 is driven to move upward, thereby causing the gap filling agent formed by mixing the lime powder and water to flow out from the first through hole 102, because the lime powder and water are mixed for a short time, the gap filling agent is in a fluid state and flows out along the outer wall of the anchor rod 1, thereby filling the gap between the anchor rod 1 and the inner wall of the surrounding rock, to reestablish the bonding force between the anchor rod 1 and the surrounding rock, restore the anchoring effect of the anchor rod 1, and enhance the overall stability of the support system, and because the gap filling agent is in a fluid state, the compactness and uniformity of the structure can be ensured.

[0035] Please refer to Figures 1 to 3The support frame 2 comprises a left cover 21, a right cover 22 and a rack 23, the upper end of the threaded rod 4 is coaxially fixed with a gear 3, the outer side of the gear 3 is engaged with two racks 23, the ends of the two racks 23 away from the gear 3 are respectively fixed with the left cover 21 and the right cover 22, and the left cover 21 is slidingly arranged at the left side of the right cover 22.

[0036] In use, the support frame 2 is fixed at the upper end of the anchor rod 1, after the anchor rod 1 is inserted into the surrounding rock, at this time the support frame 2 is located outside the surrounding rock, when rock burst occurs, the worker holds the left cover 21 and the right cover 22 with both hands, and then applies pressure inward, so as to drive the left cover 21 and the right cover 22 to slide inward along the path of the rack 23, the rack 23 is engaged with the gear 3 and drives the threaded rod 4 to rotate, so as to drive the mixture of water and lime powder in the inside of the anchor rod 1, and fill it outward, so as to increase the anchoring effect of the anchor rod 1 without changing the position of the anchor rod 1.

[0037] Please refer to Figures 1 to 2 The left cover 21 and the right cover 22 are arc-shaped and are arranged around the outer side of the gear 3; the left cover 21 and the right cover 22 protect the gear 3, which is conducive to reducing the situation that the rock impacts the rack 23 and the gear 3 when rock burst occurs, and since the gear 3 is engaged with the rack 23 on the left cover 21 and the right cover 22 at the same time, if the rock impacts any one of the left cover 21 or the right cover 22 in the direction of the rack 23 when rock burst occurs, the support frame 2 can also be driven to slide to the end close to the gear 3, so as to trigger the caulking assembly 5 to automatically and quickly fill before the worker presses, which is conducive to increasing the anchoring force of the anchor rod and the overall stability of the surrounding rock during rock burst, so as to reduce the security risk of collapse when the subsequent worker processes.

[0038] Please refer to Figure 1 and Figure 2 The upper end of the anchor rod 1 is fixed with a fixed seat 103, the inner side of the fixed seat 103 is provided with a limiting hole 131 penetrating through the fixed seat 103, and the inner side of the limiting hole 131 is provided with a limiting rod 7 penetrating through the support frame 2;

[0039] In use, the limiting rod 7 is first inserted through the limiting hole 131, and then the left cover 21 and the right cover 22 are respectively inserted on the outer side of the limiting rod 7 from the two ends of the limiting rod 7, at this time the rack 23 on the support frame 2 is just engaged with the outer side of the gear 3, when the left cover 21 and the right cover 22 are pressed from the outside to the inside, the left cover 21 and the right cover 22 slide along the limiting rod 7, the movement path of the left cover 21 and the right cover 22 is limited by the limiting rod 7, and the stability of the sliding of the rack 23 is improved.

[0040] The lower end surface of the fixed seat 103 is rotationally connected with the upper end surface of the gear 3, and the inner wall of the anchor rod 1 is fixed with a rotating seat 8;

[0041] The threaded rod 4 is supported by rotating the seat 8, which is conducive to improving the stability of the threaded rod 4 and providing support at the bottom of the threaded rod 4, thereby reducing the deformation and bending of the threaded rod 4 after rock burst.

[0042] Please refer to Figures 2 to 4 The side wall of the outer support frame 53 is fixed with at least one stopper 531, and the structure of the stopper 531 corresponds to the structure of the first through hole 102, and the position of the second through hole 61 is higher than that of the first through hole 102.

[0043] When the outer support frame 53 is located at the bottom of the hollow cavity 101, the position of the stopper 531 corresponds to the position of the first through hole 102 at this time, and the outer wall of the stopper 531 is attached to the inner wall of the hollow cavity 101 and blocks the hollow cavity 101, so that when the anchor rod 1 is inserted into the surrounding rock, the rock mass at the edge of the anchor rod 1 does not directly pass through the first through hole 102 into the hollow cavity 101, thereby reducing the problem that the rock mass entering the hollow cavity 101 is jammed on the outside of the sealing ring 54, thereby affecting the lifting of the outer support frame 53, and the stability of the lifting of the outer support frame 53 is improved. At the same time, the outer support frame 53 and the stopper 531 are fixedly connected, after the inner support frame 52 moves upward, the lime powder first passes through the first through hole 102 and mixes with water, at this time, the inner support frame 52 and the outer support frame 53 leave a gap, and then the inner support frame 52 continues to move upward to push the outer support frame 53 to move upward, and drives the stopper 531 to be offset from the first through hole 102, at this time, the caulking agent in the hollow cavity 101 flows out through the first through hole 102, and then fills in the outside of the anchor rod 1. Since the position of the second through hole 61 is higher than that of the first through hole 102, when rock burst occurs, the water in the hollow cavity 101 does not directly mix with the lime powder through the second through hole 61 under the condition that the anchor rod 1 is vertically placed. Since there is a height difference between the two through holes, the mis-mixing of water and lime powder in the shaking state is reduced, so that the caulking agent solidifies in the support pipe 6 during subsequent caulking, thereby reducing the caulking effect.

[0044] The mine pressure-measurable anti-rock-burst anchor rod provided by the present application will be further described in combination with the drawings and embodiments.

[0045] In use, first, the limiting rod 7 is inserted through the limiting hole 131, and then the left cover 21 and the right cover 22 are respectively inserted outside the limiting rod 7 from both ends of the limiting rod 7, at this time, the rack 23 on the support frame 2 is just engaged outside the gear 3, when the left cover 21 and the right cover 22 are pressed from outside to inside, the left cover 21 and the right cover 22 slide inward along the limiting rod 7, and then drive the rack 23 to engage with the gear 3 and drive the threaded rod 4 to rotate, at this time, the threaded nut seat 51 is driven upward by the thread, at the same time, the inner support frame 52 is driven to slide upward by the threaded nut seat 51, and the lime powder is driven to flow out from the second through hole 61 to the hollow cavity 101 by the sealing ring 54, at the same time, the lime powder falls to the upper layer of the water and mixes with the water to form the jointing agent, when the threaded nut seat 51 continues to slide upward and pushes the outer support frame 53 to move upward, the stop block 531 is disengaged from the first through hole 102, and then the jointing agent in the hollow cavity 101 flows out from the first through hole 102 and fills in the gap between the anchor rod 1 and the surrounding rock, so as to improve the anchoring force of the anchor rod 1.

[0046] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0047] The basic principles, main features and advantages of the present disclosure are shown and described above. It should be understood by those skilled in the art that the present disclosure is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present disclosure, and various changes and improvements can be made to the present disclosure without departing from the spirit and scope of the present disclosure, and these changes and improvements all fall within the scope of the claimed present disclosure.

Claims

1. A mine-grade pressure-measuring rockburst-resistant anchor bolt, characterized in that, include: Anchor bolt (1), support frame (2), and joint sealant assembly (5); The inner wall of the anchor rod (1) is provided with a hollow cavity (101), and a support frame (2) is fixed at the upper end of the anchor rod (1). A threaded rod (4) is fixed at the lower end of the support frame (2). A support tube (6) is fixed inside the hollow cavity (101), and the support tube (6) and the threaded rod (4) are coaxially arranged. A slidable caulking assembly (5) is provided inside the hollow cavity (101). The caulking assembly (5) includes a nut seat (51), an inner support frame (52), an outer support frame (53), and a sealing ring (54). The outer side of the threaded rod (4) is threadedly connected to the nut seat (51), and the lower end of the nut seat (51) is fixed with the inner support frame (52). The upper end of the nut seat (51) is slidably provided with the outer support frame (53), and the lower ends of the inner support frame (52) and the outer support frame (53) are fixed with the sealing ring (54). The side wall of the anchor rod (1) is provided with a first through hole (102) penetrating the anchor rod (1), and the inner wall of the support tube (6) is provided with a second through hole (61) penetrating the support tube (6).

2. The mine pressure-measuring rockburst-resistant anchor bolt according to claim 1, characterized in that, The support frame (2) includes a left cover (21), a right cover (22) and a rack (23). The upper end of the threaded rod (4) is coaxially fixed with a gear (3), and two racks (23) mesh with the outer side of the gear (3). The left cover (21) and the right cover (22) are fixedly fixed at the ends of the two racks (23) away from the gear (3), respectively. The left cover (21) is slidably disposed on the left side of the right cover (22).

3. A mine-grade pressure-measuring rockburst-resistant anchor bolt according to claim 2, characterized in that, The left cover (21) and right cover (22) are arc-shaped and are arranged around the outside of the gear (3).

4. A mine-grade pressure-measuring rockburst-resistant anchor bolt according to claim 1, characterized in that, The upper end of the anchor rod (1) is fixed with a fixing seat (103), and the inner side of the fixing seat (103) is provided with a limiting hole (131) that penetrates the fixing seat (103), and the inner side of the limiting hole (131) is provided with a limiting rod (7) that penetrates the support frame (2).

5. A mine-grade pressure-measuring rockburst-resistant anchor bolt according to claim 4, characterized in that, The lower end face of the fixed seat (103) is rotatably connected to the upper end face of the gear (3), and the inner wall of the anchor rod (1) is fixed with a rotating seat (8).

6. A mine-grade pressure-measuring rockburst-resistant anchor bolt according to claim 1, characterized in that, The side wall of the outer support frame (53) is fixed with at least one stop (531), and the structure of the stop (531) corresponds to the structure of the first through hole (102).

7. A mine-grade pressure-measuring rockburst-resistant anchor bolt according to claim 6, characterized in that, The position of the second through hole (61) is higher than the position of the first through hole (102).

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