A device for reinforcing a slope of an open coal mine

Abstract

The utility model relates to the technical field of coal mine slope reinforcement, specifically relates to a kind of open coal mine slope reinforcement device, including grouting anchor rod, grouting anchor rod is equipped with backing plate by fixed mechanism, the top of backing plate is welded with several clamping rods, clamping rod is sleeved with limit block, several limit blocks are fixedly connected with steel rope net, and positioning block is threadedly connected on clamping rod;Grouting anchor rod provides anchoring force into rock formation, steel rope net is fixed on the surface of slope by backing plate and clamping rod, forms the reinforcement system of point surface combination, both can constrain the loosening or slippage of surface rock-soil body, and damaged steel rope net can be replaced in time.

Description

Technical Field

[0001] This utility model relates to a reinforcement device, specifically an open-pit coal mine slope reinforcement device, belonging to the field of coal mine slope reinforcement technology. Background Technology

[0002] In open-pit coal mining, slope stability is a key factor in ensuring production safety. Open-pit coal mine slopes are mostly composed of alternating soil and rock layers. Affected by mining disturbances, rainwater erosion, diurnal temperature variations, and their own weight, the surface soil and rock are prone to loosening, spalling, and even localized collapses. This not only threatens the safety of workers and equipment but may also delay mining progress. Therefore, installing protective netting on the slope surface has become an important technical means to restrain surface soil and rock displacement and prevent small-scale collapses.

[0003] However, traditional steel rope nets are mostly fixed by full welding, integral binding, or casting with anchor bolts and pads. When the net body deforms due to long-term pressure from soil and rock, breaks locally due to weathering and corrosion, or has holes due to falling rocks, the entire area of ​​steel rope netting along with the connecting parts must be removed and replaced because the net body and the fixed structure form an inseparable whole. This not only wastes a large number of intact net bodies and accessories, but also requires interruption of slope protection work during the removal and reinstallation process. Especially before severe weather such as heavy rain and strong winds, the failure to replace in time may cause safety hazards. Utility Model Content

[0004] The purpose of this utility model is to provide an open-pit coal mine slope reinforcement device to solve the above problems. The grouting anchor rods penetrate deep into the rock layer to provide anchoring force, and the steel rope net is fixed to the slope surface by pads and clamps to form a point-to-surface reinforcement system. This system can not only restrain the loosening or sliding of the surface rock and soil, but also replace the damaged steel rope net in a timely manner.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: an open-pit coal mine slope reinforcement device, including a grouting anchor rod, a pad plate installed on the grouting anchor rod by a fixing mechanism, a plurality of clamping rods welded to the top of the pad plate, a limiting block sleeved on the clamping rod, a steel rope net fixedly connected between the plurality of limiting blocks, and a positioning block threadedly connected to the clamping rod.

[0006] Preferably, the limiting block has a through hole with the same diameter as the locking rod, and the limiting block abuts against the top of the pad.

[0007] Preferably, the clamping rod is arranged in a cylindrical structure, and a plurality of the clamping rods are evenly distributed along the circumference of the pad.

[0008] Preferably, the fixing mechanism includes a sleeve rod and an alloy drill bit, the sleeve rod is fixedly connected to the end of the grouting anchor rod, and the alloy drill bit is welded to the bottom end of the sleeve rod.

[0009] Preferably, the sidewall of the alloy drill bit is provided with several sets of grooves in an annular shape at equal intervals, and the grooves are arranged in a V-shaped structure.

[0010] Preferably, the fixing mechanism further includes a grout stop plug, the bottom end of the pad is fixedly connected to the grout stop plug, the diameter of the grout stop plug is larger than the diameter of the grouting anchor rod, and the grout stop plug is arranged in a frustum-shaped structure.

[0011] Preferably, the fixing mechanism further includes protrusions, and a plurality of protrusions are welded to the bottom of the pad near the stop plug, the protrusions being arranged in a conical structure.

[0012] Preferably, the fixing mechanism further includes a nut, the pad is threadedly locked to the side wall of the grouting anchor rod by the nut, and the nut abuts against the top of the pad.

[0013] Preferably, the fixing mechanism further includes a lifting ring, which is fixedly connected to the grouting anchor rod. The lifting ring is located at the end of the grouting anchor rod away from the alloy drill bit, and the axis of the lifting ring is perpendicular to the axis of the grouting anchor rod.

[0014] The beneficial effects of this utility model are as follows: the grouting anchor rods penetrate deep into the rock strata to provide anchoring force, and the steel rope net is fixed to the slope surface through the pad and clamp rods, forming a point-to-surface reinforcement system. This system can resist the shear force inside the slope and restrain the loosening or sliding of the surface rock and soil, greatly improving the overall stability of the open-pit coal mine slope. The limiting block is positioned by the clamp rods and locked with the threaded locking mechanism to ensure that the steel rope net is firmly installed and not easy to fall off. At the same time, the steel rope net in a certain area can be replaced in time when it is damaged. The clamp rods are evenly distributed along the circumference of the pad, so that the steel rope net is subjected to balanced force and avoids damage caused by local stress concentration. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the connection structure between the grout stopper and the gasket of this utility model.

[0017] Figure 3 This is a schematic diagram of the connection structure between the pad and the clamping rod of this utility model;

[0018] Figure 4 This is a schematic diagram of the connection structure between the limiting block and the steel rope mesh of this utility model;

[0019] Figure 5 This is a schematic diagram of the connection structure between the grouting anchor rod and the lifting ring of this utility model.

[0020] In the diagram: 1. Grouting anchor; 2. Fixing mechanism; 201. Nut; 202. Sleeve rod; 203. Alloy drill bit; 204. Lifting ring; 205. Grout stop plug; 206. Protrusion; 3. Limiting block; 4. Steel rope net; 5. Pad plate; 6. Clamping rod; 7. Positioning block. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-5 As shown, an open-pit coal mine slope reinforcement device includes a grouting anchor 1. After the grouting anchor 1 penetrates into the rock stratum, it is tightly bonded to the rock stratum through grouting, providing deep anchoring force to resist internal shear deformation of the slope. A pad 5 is installed on the grouting anchor 1 through a fixing mechanism 2. Several clamping rods 6 are welded to the top of the pad 5. Limiting blocks 3 are sleeved on the clamping rods 6. Steel rope nets 4 are fixedly connected between the several limiting blocks 3. The rope nets 4 cover the slope surface to form surface protection, restraining the loosening or sliding of the rock and soil. Together with the deep anchor, it forms a point-to-surface reinforcement system, which greatly improves the overall anti-sliding and anti-collapse capacity of the slope. A positioning block 7 is threadedly connected to the clamping rod 6.

[0023] As a technical optimization of this utility model, the limiting block 3 has a through hole with the same diameter as the clamping rod 6, and the limiting block 3 abuts against the top of the pad 5. The clamping rod 6 is set in a cylindrical structure, and several clamping rods 6 are evenly distributed along the circumference of the pad 5. The positioning block 7 is screwed into the clamping rod 6 to press the limiting block 3 to fix the steel rope net 4. The cooperation between the limiting block 3 and the positioning block 7 can ensure that the steel rope net 4 is firmly installed and is not easy to loosen due to slope vibration or rock and soil compression. At the same time, the steel rope net 4 can be replaced in time when it is damaged.

[0024] As a technical optimization of this utility model, the fixing mechanism 2 includes a sleeve rod 202 and an alloy drill bit 203. The end of the grouting anchor rod 1 is fixedly connected to the sleeve rod 202, which transmits torque to allow the grouting anchor rod 1 to penetrate deep into the slope. The bottom end of the sleeve rod 202 is welded with an alloy drill bit 203. The side wall of the alloy drill bit 203 is provided with several sets of grooves in an annular shape at equal intervals to drill into the rock strata of the coal mine slope. The alloy drill bit 203 rotates at high speed under the drive of the anchor drilling machine. The V-shaped grooves provided inside can cut and break the rock strata and discharge rock slag through the gaps between the grooves, thereby realizing the drilling of the rock strata of the coal mine slope.

[0025] As a technical optimization of this utility model, the fixing mechanism 2 also includes a grout stop plug 205. The bottom end of the pad 5 is fixedly connected to the grout stop plug 205. The diameter of the grout stop plug 205 is larger than the diameter of the grouting anchor rod 1, and the grout stop plug 205 is set in a frustum-shaped structure. The nut 201 is tightened to make the pad 5 and the grouting anchor rod 1 rigidly connected. After the grout stop plug 205 is squeezed, it seals the gap of the drill hole to prevent the grout from leaking out during grouting. Several protrusions 206 are welded to the bottom of the pad 5 near the grout stop plug 205. The protrusions 206 are set in a conical structure. The conical protrusions 206 at the bottom of the pad 5 penetrate into the surface soil and rock of the slope, thereby enhancing the anti-slip ability of the pad 5.

[0026] As a technical optimization of this utility model, the fixing mechanism 2 also includes a nut 201. The pad 5 is threadedly locked to the side wall of the grouting anchor rod 1 by the nut 201, and the nut 201 abuts against the top of the pad 5. A lifting ring 204 is fixedly connected to the grouting anchor rod 1. The lifting ring 204 is located at the end of the grouting anchor rod 1 away from the alloy drill bit 203. The axis of the lifting ring 204 is perpendicular to the axis of the grouting anchor rod 1. The lifting ring 204 assists in handling and positioning, simplifies the handling of the grouting anchor rod 1, and facilitates the reduction of construction difficulty.

[0027] In use, this invention first involves drilling into the rock strata of a coal mine slope. The alloy drill bit 203 rotates at high speed under the drive of an anchor drilling rig. Its internal V-shaped grooves cut and break the rock strata, and rock debris is discharged through the gaps in the grooves, thus achieving drilling into the coal mine slope rock strata. The sleeve 202 fixed to the alloy drill bit 203 transmits torque, causing the grouting anchor 1 to penetrate deep into the slope. After the alloy drill bit 203 drills in, the grouting anchor 1 forms a preliminary mechanical engagement with the slope rock strata. Once the grouting anchor 1 penetrates deep into the rock strata, grouting is injected into the rock... The layers are tightly bonded, providing deep anchoring force to resist internal shear deformation of the slope. If hoisting is required, lifting rings 204 can be used to assist in handling and positioning, simplifying the handling of the grouting anchor rod 1 and reducing construction difficulty. A grout stop plug 205 and a pad 5 are sequentially fitted onto the exposed part of the grouting anchor rod 1, so that the grout stop plug 205 is located at the bottom of the pad 5 and fits against the slope surface. Then, the top of the pad 5 is threaded and locked with a nut 201. The locking of the nut 201 makes the pad 5 rigidly connected to the grouting anchor rod 1, and the grout stop plug 205 seals after being compressed. The drilling gap prevents grout leakage during grouting, ensuring grout fullness and enhancing the bond strength between the grouting anchor 1 and the rock stratum. When the pad 5 is fixed to the grouting anchor 1, the conical protrusion 206 at the bottom of the pad 5 penetrates the surface soil and rock of the slope, thereby enhancing the anti-slip ability of the pad 5. Finally, the limiting block 3 is fitted onto the side wall of the clamping rod 6 at the top of the pad 5. Several clamping rods 6 are evenly distributed on the top of the pad 5, which can make the steel rope net 4 bear the force evenly and avoid local stress concentration that could cause the net to tear. The limiting block 3 abuts against the top of the pad 5. The steel rope net 4 is fixedly connected to all the limiting blocks 3 at its edge. The positioning block 7 is screwed into the clamping rod 6 to press the limiting block 3 to fix the steel rope net 4. The cooperation between the limiting block 3 and the positioning block 7 can ensure that the steel rope net 4 is firmly installed and is not easy to loosen due to slope vibration or rock and soil compression. At the same time, the steel rope net 4 can be replaced in time when it is damaged. The steel rope net 4 covers the slope surface to form a surface protection, restraining the loosening or sliding of the rock and soil. Together with the deep anchor rod, it forms a point and surface reinforcement system, which greatly improves the overall anti-sliding and anti-collapse capacity of the slope.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for reinforcing a slope in an open pit coal mine, comprising a grouting anchor rod (1), characterized in that: A pad (5) is installed on the grouting anchor (1) by a fixing mechanism (2). Several clamps (6) are welded to the top of the pad (5). A limit block (3) is sleeved on the clamp (6). A steel rope net (4) is fixedly connected between the several limit blocks (3). A positioning block (7) is threaded on the clamp (6).

2. An open cut coal mine slope reinforcement device as claimed in claim 1, characterised in that: The limiting block (3) has a through hole with the same diameter as the locking rod (6), and the limiting block (3) abuts against the top of the pad (5).

3. An open cut coal mine slope reinforcement device as claimed in claim 1, characterised in that: The clamp (6) is arranged in a cylindrical structure, and several clamps (6) are evenly distributed along the circumference of the pad (5).

4. An open cut coal mine slope reinforcement device as claimed in claim 1, characterised in that: The fixing mechanism (2) includes a sleeve rod (202) and an alloy drill bit (203). The end of the grouting anchor rod (1) is fixedly connected to the sleeve rod (202), and the bottom end of the sleeve rod (202) is welded with the alloy drill bit (203).

5. An open cut coal mine slope reinforcement device as claimed in claim 4, characterised in that: The sidewall of the alloy drill bit (203) is provided with several sets of grooves in an annular shape at equal intervals, and the grooves are arranged in a V-shaped structure.

6. An open cut coal mine slope reinforcement device as claimed in claim 1, characterised in that: The fixing mechanism (2) also includes a grout stop plug (205). The bottom end of the pad (5) is fixedly connected to the grout stop plug (205). The diameter of the grout stop plug (205) is larger than the diameter of the grouting anchor rod (1), and the grout stop plug (205) is set in a frustum-shaped structure.

7. An open cut coal mine slope reinforcement device as claimed in claim 1, characterised in that: The fixing mechanism (2) also includes a protrusion (206). Several protrusions (206) are welded to the bottom of the pad (5) near the stop plug (205). The protrusions (206) are arranged in a conical structure.

8. An open cut coal mine slope reinforcement device as claimed in claim 1, characterised in that: The fixing mechanism (2) also includes a nut (201), the pad (5) is threadedly locked to the side wall of the grouting anchor (1) by the nut (201), and the nut (201) abuts against the top of the pad (5).

9. An open cut coal mine slope reinforcement device as claimed in claim 4, characterised in that: The fixing mechanism (2) also includes a lifting ring (204). The lifting ring (204) is fixedly connected to the grouting anchor (1). The lifting ring (204) is located at the end of the grouting anchor (1) away from the alloy drill bit (203). The axis of the lifting ring (204) is perpendicular to the axis of the grouting anchor (1).

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