Device for preventing collapse of open stope slope
By using isolation piles to support anchor rods and equipping them with tilt sensors on the slopes of open-pit mines, the problem of continuous detection and timely alarm in existing technologies has been solved, enabling continuous monitoring and timely reinforcement of the slopes and improving their stability and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI MASTEEL MINING RESOURCES GRP NANSHAN MINING CO LTD
- Filing Date
- 2025-05-21
- Publication Date
- 2026-05-15
AI Technical Summary
The existing slope reinforcement structure in open-pit mines cannot continuously monitor and issue timely warnings, resulting in the inability to detect and reinforce collapses in a timely manner.
The anchor rods are supported by isolation piles. When filling concrete, the angle of the anchor rods is monitored by tilt sensors, and alarms are issued in a timely manner to ensure slope stability.
It enables continuous monitoring and timely alerts of slopes, improves slope stability and landslide prevention capabilities, and ensures the safety and reliability of slopes.
Smart Images
Figure CN224243852U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of open-pit mine slopes, specifically a device for preventing landslides on open-pit mine slopes. Background Technology
[0002] The device for preventing landslides on open-pit mine slopes is mainly achieved through the combination of soil nails and concrete. Specifically, this device uses soil nails that are deeply embedded in the slope soil to form a strong anchoring force, effectively enhancing the stability of the slope. At the same time, concrete is poured into the voids in the soil around the soil nails, tightly bonding with the soil nails to form a solid protective layer. This composite structure of soil nails and concrete not only improves the shear strength and anti-sliding capacity of the slope, but also greatly reduces the risk of landslides.
[0003] Chinese patent CN211922653U discloses a soil and rock slope reinforcement structure, including an anchor rod. The head of the anchor rod is fixed to the grid beam by a washer and a locking nut. The anchor rod is also provided with an expansion structure. The expansion structure on the anchor rod enhances the anchoring of the anchor rod, thereby enhancing the overall reinforcement and stability of the soil and rock slope reinforcement structure.
[0004] The aforementioned patented soil and rock slope reinforcement structure cannot continuously monitor the reinforced location after installation, nor can it issue an alarm when the reinforced location collapses. The inability to monitor the reinforced location means that the initial collapse of the soil and rock slope cannot be detected in time, and further reinforcement cannot be carried out in a timely manner. Utility Model Content
[0005] The purpose of this invention is to provide a device for preventing landslides on open-pit mine slopes. When the anchor rods are supported by isolation piles and then filled with concrete to support the slope, the angle of the anchor rods will change due to the collapse of the slope. The angle of the anchor rods will be continuously monitored by the tilt sensor inside the installation box. When the tilt sensor detects the angle change, an alarm will be issued, thus solving the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a device for preventing landslides on open-pit mine slopes, comprising an anchor rod, a guide head at one end of the anchor rod, a gasket at the other end of the anchor rod, an installation box on the outer wall of the gasket, an installation cavity reserved inside the installation box, an angle sensor for angle detection installed inside the installation cavity, an anchor welded around the welding position of the gasket and the anchor rod, a spiral reinforcing ring surrounding the anchor facing the outside of the anchor rod, a steel wire rope surrounding the outside of the anchor rod, and an isolation pile surrounding the steel wire rope.
[0007] Preferably, four isolation piles are evenly distributed laterally outside the steel wire rope, and a stabilizing ring is provided between two adjacent isolation piles. The stabilizing ring is welded and fixed to the four steel wire ropes distributed around it. The stabilizing ring, isolation piles and steel wire ropes are all welded and fixed to the outer wall of the anchor rod.
[0008] Preferably, the guide head is welded and fixed to the anchor rod, and the gasket is welded and fixed to the anchor rod.
[0009] Preferably, the mounting box and the gasket are fixedly connected by bolts.
[0010] Preferably, the spiral reinforcing ring, anchor, and anchor rod are welded and fixed in sequence.
[0011] Preferably, the anchor rod and the gasket are continuously provided with reserved cavities, the reserved cavities are provided with grouting steel pipes, and the guide head is provided with three pouring ports evenly distributed around its interior.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0013] In this invention, when the anchor rod and the internal grouting steel pipe are placed into the reinforcement hole, the anchor rod is supported by an isolation pile connected by a steel wire rope. This allows the anchor rod to be close to the center of the reinforcement hole, increasing the contact area between the anchor rod and the subsequent filling concrete. This allows the anchor rod to be positioned in the middle of the solidified concrete. Furthermore, after the anchor rod is in full contact with the concrete, if the slope at the concrete location collapses, the guide head angle will change and shift, which can be efficiently detected by the pre-installed tilt sensor. Finally, during the installation of the anchor rod, the spiral reinforcement ring, stabilizing ring, and steel wire rope will be inserted into the reinforcement hole. The spiral reinforcement ring, stabilizing ring, and steel wire rope can contact the subsequent filling concrete, increasing the contact area between the concrete and the collapse prevention device. This improves the load-bearing capacity and further enhances the accuracy of the tilt sensor's detection angle when the slope at the mining area collapses. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall external structure of this utility model;
[0015] Figure 2 For the present utility model Figure 1 Enlarged view of a portion of region A in the middle;
[0016] Figure 3 This is a cross-sectional view of the internal structure of the anchor bolt of this utility model;
[0017] Figure 4 For the present utility model Figure 3 Enlarged view of a portion of region B in the middle;
[0018] Figure 5For the present utility model Figure 3 Enlarged view of a portion of region C in the middle;
[0019] Figure 6 This is a cross-sectional view of the internal structure of the reinforcing hole of this utility model.
[0020] In the diagram: 1. Anchor bolt; 2. Isolation pile; 3. Grouting steel pipe; 4. Steel wire rope; 5. Stabilizing ring; 6. Anchor; 7. Spiral reinforcement ring; 8. Gasket; 9. Mounting box; 10. Guide head; 11. Pouring port; 12. Reserved cavity; 13. Inclination sensor; 14. Mounting cavity; 15. Stope slope; 16. Reinforcement hole. Detailed Implementation
[0021] The present invention will be further described below with reference to specific embodiments.
[0022] like Figure 1 and Figure 6 As shown, this embodiment of a device for preventing collapse of an open-pit mine slope includes an anchor rod 1. The anchor rod 1 is the main support position for the reinforcement of the open-pit mine slope. By pre-filling the anchor rod 1, it can support the subsequent filling and reinforcement of concrete. One end of the anchor rod 1 is provided with a guide head 10, and the guide head 10 is welded and fixed to the anchor rod 1. The other end of the anchor rod 1 is provided with a gasket 8, and the gasket 8 is welded and fixed to the anchor rod 1. After the concrete is completely filled into the reinforcement hole 16, the gasket 8 covers the filled concrete and the anchor rod 1. The gasket 8 directly contacts the supported position of the mine slope 15.
[0023] In order to detect the support status of anchor bolt 1, such as Figure 5 As shown, the outer wall of the gasket 8 is provided with a mounting box 9, and the mounting box 9 is fixedly connected to the gasket 8 by bolts. The mounting box 9 has a reserved mounting cavity 14. An angle sensor 13 for angle detection is installed inside the mounting cavity 14. The angle sensor 13 detects the fixed angle of the anchor bolt 1. When the early slight collapse occurs on the mining slope 15 where the anchor bolt 1 is fixed, the resulting change in the angle of the anchor bolt 1 can be directly detected by the angle sensor 13 and a signal is sent to the device connected to the angle sensor 13, reminding the angle sensor 13 that the position of the mining slope 15 supported by the anchor bolt 1 has collapsed and needs to be inspected and further reinforced. The angle sensor 13 is directly powered by an external power supply.
[0024] To improve the contact effect between the subsequent filling concrete and the anchor rod 1 and enhance the reinforcement effect, an anchor 6 is welded around the welding position of the gasket 8 and the anchor rod 1. A spiral reinforcement ring 7 is arranged around the outside of the anchor 6 facing the anchor rod 1. The spiral reinforcement ring 7, the anchor 6, and the anchor rod 1 are welded and fixed in sequence. Through the connection of the anchor 6 to the spiral reinforcement ring 7, the concrete can effectively contact the required solidification position at the uppermost end of the reinforcement hole 16, so that the concrete can effectively connect with the reinforcement position. The concrete is simultaneously connected to the gasket 8, the anchor rod 1, the anchor 6, and the spiral reinforcement ring 7 at the reinforcement hole 16 position, which improves the integrity after solidification and enhances the support effect of the concrete on the mining slope 15 position. It also allows the concrete and the anchor rod 1 inside the concrete to accurately change angles after the mining slope 15 position collapses, and the tilt sensor 13 accurately detects the angle changes.
[0025] To fill the reinforcement hole 16, where the anchor bolt 1 is inserted, with concrete, such as... Figure 3 and Figure 4 As shown, the anchor rod 1 and the gasket 8 are continuously provided with reserved cavities 12. The reserved cavity 12 is provided with a grouting steel pipe 3. The grouting steel pipe 3 can be inserted directly into the reserved cavity 12 inside the anchor rod 1 to complete the placement of the grouting steel pipe 3. Subsequently, concrete is sent to the anchor rod 1 and the area around it through the grouting steel pipe 3 to cover the reinforcement hole 16.
[0026] Furthermore, the reserved cavity 12 inside the gasket 8 prevents the protruding grouting steel pipe 3 from restricting contact with the anchor rod 1 and covering the reinforcement hole 16 when covering the reinforcement hole 16. The reserved cavity 12 inside the gasket 8 facilitates the final support of the mining slope 15, completes the covering of the reinforcement hole 16, and protects the concrete at the reinforcement hole 16 before it solidifies.
[0027] In order to allow the concrete discharged from the grouting steel pipe 3 and flowing into the reserved cavity 12 to flow into the reinforcement hole 16, such as Figure 2 As shown, the guide head 10 has three pouring ports 11 evenly distributed around its interior. The concrete flowing into the reserved cavity 12 will flow into the reinforcement hole 16 from the pouring port 11, thus filling the reinforcement hole 16.
[0028] To facilitate the placement of anchor rod 1 and avoid the need for a support structure to bring anchor rod 1 close to the center of reinforcement hole 16 when it is inserted into the reinforcement hole 16, and also to avoid the need for a support structure to bring anchor rod 1 close to the center of reinforcement hole 16 after the concrete is filled, a steel wire rope 4 is arranged around the outside of anchor rod 1, and an isolation pile 2 is arranged around the outside of steel wire rope 4. The protruding isolation pile 2 can support anchor rod 1, so that anchor rod 1 is suspended and close to the center of reinforcement hole 16.
[0029] Four isolation piles 2 are evenly distributed laterally outside the steel wire rope 4. A stabilizing ring 5 is set between two adjacent isolation piles 2, and the stabilizing ring 5 is welded and fixed to the four steel wire ropes 4 distributed around it. The stabilizing ring 5, isolation piles 2 and steel wire ropes 4 are all welded and fixed to the outer wall of the anchor rod 1. The extended stabilizing ring 5, isolation piles 2 and steel wire ropes 4 can further increase the area of subsequent contact with concrete and improve the support effect of the concrete on the support position of the reinforcement hole 16 after solidification.
[0030] To further explain the above embodiments, this utility model also provides a method for preventing landslides on open-pit mine slopes, comprising the following steps:
[0031] S1: When using the device to reinforce the position of the mining slope 15 and prevent its collapse, a hole is pre-drilled at the position of the mining slope 15 that needs to be supported to form a reinforcement hole 16. The anchor rod 1 inserts the guide head 10 toward the inside of the reinforcement hole 16. During the insertion process, the outer wall of the anchor rod 1 is supported and restricted by the isolation pile 2 connected by the steel wire rope 4 and the stabilizing ring 5, so that the anchor rod 1 is close to the middle position of the reinforcement hole 16, which facilitates the subsequent cement filling and subsequent support for the position of the mining slope 15.
[0032] S2: Insert the grouting steel pipe 3 into the reserved cavity 12. The concrete flows along the grouting steel pipe 3 towards the interior of the reserved cavity 12 with the help of the extraction machine. The concrete finally flows out from the guide head 10 through the pouring port 11 and enters the reinforcement hole 16.
[0033] S3: As the concrete is filled, the level of the concrete in the reinforcement hole 16 rises and squeezes out the air inside. After the concrete overflows the reinforcement hole 16, a gasket 8 is welded to the end of the anchor rod 1 away from the guide head 10 to completely cover the reinforcement hole 16, so that the gasket 8 covers the outermost part of the reinforcement hole 16. At the same time, the concrete filling inside the reinforcement hole 16 is covered by the gasket 8, and the extended anchor rod 1 and gasket 8 are fixed as the concrete solidifies.
[0034] S4: During the support process, after the concrete has solidified, the mounting box 9, which is fixed to the surface of the gasket 8 by bolts, is removed. An inclination sensor 13 is installed in the pre-reserved mounting cavity 14 inside the mounting box 9, and the inclination sensor 13 records the angle at this time. During the subsequent support of the mining slope 15, if the support position collapses and causes soil to fall off, the angle of the anchor bolt 1 and the mounting box 9 will change. The inclination sensor 13 installed can directly detect the change of angle, so as to understand the reinforcement status of the mining slope 15 and facilitate timely reinforcement.
[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.
Claims
1. A device for preventing landslides on open-pit mine slopes, comprising anchor bolts (1), characterized in that, One end of the anchor rod (1) is provided with a guide head (10), and the other end of the anchor rod (1) is provided with a gasket (8). The outer wall of the gasket (8) is provided with an installation box (9). The installation box (9) has a reserved installation cavity (14). An angle sensor (13) for angle detection is installed inside the installation cavity (14). An anchor (6) is welded around the welding position of the gasket (8) and the anchor rod (1). The anchor (6) is surrounded by a spiral reinforcement ring (7) facing the outside of the anchor rod (1). The outside of the anchor rod (1) is surrounded by a steel wire rope (4). The outside of the steel wire rope (4) is provided with an isolation pile (2).
2. The device for preventing landslides on open-pit mine slopes according to claim 1, characterized in that, There are four isolation piles (2) evenly distributed laterally outside the steel wire rope (4). A stabilizing ring (5) is set between two adjacent isolation piles (2), and the stabilizing ring (5) is welded and fixed to the four steel wire ropes (4) distributed around it. The stabilizing ring (5), isolation piles (2) and steel wire ropes (4) are all welded and fixed to the outer wall of the anchor rod (1).
3. The device for preventing landslides on open-pit mine slopes according to claim 1, characterized in that, The guide head (10) is welded and fixed to the anchor rod (1), and the gasket (8) is welded and fixed to the anchor rod (1).
4. The device for preventing landslides on open-pit mine slopes according to claim 1, characterized in that, The mounting box (9) and the gasket (8) are fixedly connected by bolts.
5. A device for preventing landslides on open-pit mine slopes according to claim 1, characterized in that, The spiral reinforcement ring (7), anchor (6) and anchor rod (1) are welded and fixed in sequence.
6. The device for preventing landslides on open-pit mine slopes according to claim 1, characterized in that, The anchor rod (1) and the gasket (8) are continuously provided with a reserved cavity (12), and the reserved cavity (12) is provided with a grouting steel pipe (3). The guide head (10) is evenly distributed with three pouring ports (11) around it.