An open-pit mine slope stability inspection method

Abstract

The present invention discloses a method for testing the stability of an open-pit mine slope. By using the method of setting testing equipment in a drill hole after drilling, it can effectively evaluate the performance of the slope, facilitate formulating corresponding measures according to the evaluation situation, effectively improve the testing ability and testing effect, and ensure the convenience of testing. During the testing, by setting the first testing impact point A and the second testing impact point B, impact testing can be carried out from different positions to improve the testing effect. The selection of the positions of the first testing impact point A and the second testing impact point B can most effectively show the anti-slip and anti-collapse capabilities at the drill hole. At the same time, for each point, impact forces are applied from different directions to effectively realize the anti-slip and anti-collapse capabilities under different impacts.

Description

Technical Field

[0001] The present invention is specifically a method for testing the stability of open-pit mine slopes, and relates to the fields related to slope stability testing and evaluation. Background Art

[0002] For the slopes of open-pit mines, since the slopes are prone to dangers such as sliding and collapse, their stability is crucial. At present, it is difficult to effectively evaluate the stability of slopes. More often, corresponding protection measures are taken based on experience and observation or according to the soil structure of the slopes. This method is difficult to effectively compare the stability of slopes, difficult to generate corresponding standards according to the corresponding evaluation requirements, and thus difficult to enforce requirements for slope stability measures, affecting the guarantee of slope stability. Summary of the Invention

[0003] Therefore, to solve the above deficiencies, the present invention provides a method for testing the stability of open-pit mine slopes herein.

[0004] The present invention is implemented as follows. A method for testing the stability of open-pit mine slopes is constructed, which is characterized in that it includes the following steps: (1) Select a test position and drill a test hole 6: Select a test position in the middle and lower part of the slope 1, and use drilling equipment to drill a test hole 6. It is required that the test hole extends horizontally, and the extension depth h of the test hole 6 is determined;

[0005] (2) Measure the slope inclination angle a: Measure the inclination angle a of the slope surface 3 of the upper part of the slope at the test hole 6 facing upward;

[0006] (3) Determine the first test impact point A: Determine the first test impact point A from the position of the test hole along the upward inclination direction of the slope. It is required that the distance between the first test impact point A and the position of the test hole is h*cosa;

[0007] (4) Determine the second test impact point B: Determine the second test impact point B from the position of the test hole along the upward inclination direction of the slope. It is required that the distance between the second test impact point B and the position of the test hole is (h / 2)*cosa;

[0008] (5) Withdraw the drilling equipment from the test hole, and insert the test equipment 4 into the test hole 6. It is required that the outer diameter of the test equipment is smaller than the inner diameter of the test hole;

[0009] (6) First, use the impact device to apply a vibration impact force in the direction perpendicular to the slope at the first inspection impact point A, and observe whether there is pressure generated by local collapse of the inspection hole around the inspection device and the position of the pressure; then, use the impact device to apply a vibration impact force in the vertical direction at the first inspection impact point A, and observe whether there is pressure generated by local collapse of the inspection hole around the inspection device and the position of the pressure;

[0010] (7) Use the impact device to apply a vibration impact force in the direction perpendicular to the slope at the first inspection impact point B, and observe whether there is pressure generated by local collapse of the inspection hole around the inspection device and the position of the pressure; then, use the impact device to apply a vibration impact force in the vertical direction at the first inspection impact point B, and observe whether there is pressure generated by local collapse of the inspection hole around the inspection device and the position of the pressure;

[0011] (8) The inspection device records in real time the impact force of the impact device, the impact position, and the magnitude and position of the detected pressure, and generates a corresponding relationship;

[0012] (9) Inspect other inspection positions according to the above method.

[0013] Furthermore, as a preference, the inner diameter of the inspection hole is related to the depth of the inspection hole, and the depth of the inspection hole 6 is greater than 1 m and less than 8 m. For example, when the depth of the inspection hole is 1 - 3 m, the inner diameter of the inspection hole can be selected as 5 - 15 cm; when the depth of the inspection hole is greater than 3 m and less than 5 m, the inner diameter of the inspection hole can be selected as 16 - 25 cm; when the depth of the inspection hole is greater than 5 m and less than 8 m, the inner diameter of the inspection hole 6 can be selected as 26 - 30 cm.

[0014] Furthermore, as a preference, the difference between the inner diameter of the inspection hole and the outer diameter of the inspection end of the inspection device is 1.5 - 4 cm.

[0015] Furthermore, as a preference, when applying the impact force in steps (6) - (7), each application of the impact force is at the same frequency, and the applied impact force increases gradually from small to large.

[0016] Furthermore, as a preference, the drilling device includes a drill pipe 14, wherein the drill pipe 14 is detachably installed on the positioning and driving mechanism, and the inspection device 4 includes an inspection rod, and the inspection rod is also detachably installed on the positioning and driving mechanism.

[0017] Further, preferably, the positioning and driving mechanism includes a first positioning plate 9, a second positioning plate 10, a locking and positioning mechanism, a bearing seat 16, a main rotating motor 12, and a rotating interface shaft 15. The first positioning plate 9 and the second positioning plate 10 are arranged in parallel at an interval, and the first positioning plate and the second positioning plate are fixed together by connecting columns. The locking and positioning mechanism is disposed through the first positioning plate and the second positioning plate. The bearing seat 16 is disposed at the center of the second positioning plate. A driving shaft is rotatably disposed in the bearing seat 16. One end of the driving shaft is drivingly connected to the main rotating motor 12, and the other end of the driving shaft is fixedly provided with the rotating interface shaft 15. The main rotating motor 12 is fixed on the second positioning plate. The inspection rod and the drill rod are both detachably connected to the rotating interface shaft.

[0018] Further, preferably, the locking and positioning mechanism includes a plurality of driving nuts 8, a driving screw 7, a guide sleeve, and a locking column 11. A plurality of driving nuts 8 are rotatably disposed on the first positioning plate 9. A driving screw 7 is threadedly connected to each driving nut 8. A driving motor 17 for simultaneously driving the rotation of each driving nut is further disposed on the first positioning plate. A gear transmission is adopted between the driving motor and the driving nut. The end of the driving screw facing the second positioning plate is integrally and coaxially fixedly provided with the locking column 11. A guide sleeve is disposed on the second positioning plate. The locking column is rotatably and axially slidably passed through the guide sleeve. The end of the locking column is a spiral groove structure or a tip structure.

[0019] Further, preferably, the inspection rod includes a cylindrical rod body 13 and an arc-shaped sensing piece group 18. A plurality of the arc-shaped sensing piece groups 18 are arranged at intervals along the axial direction on the cylindrical rod body 13. Each arc-shaped sensing piece group includes a plurality of arc-shaped sensing pieces arranged in a circumferential array on the outer wall of the cylindrical rod body.

[0020] Further, preferably, a pressure sensor is disposed between each arc-shaped sensing piece and the outer wall of the cylindrical rod body, and each arc-shaped sensing piece group is correspondingly provided with a number indicating its position.

[0021] Further, preferably, each arc-shaped sensing piece group includes 4-6 arc-shaped sensing pieces.

[0022] The present invention has the following advantages: A method for inspecting the stability of an open-pit mine slope provided by the present invention has the following advantages compared with the same type of methods:

[0023] The present invention relates to a method for testing the stability of an open-pit mine slope. By setting up testing equipment in the drilled holes after drilling, it can effectively evaluate the performance of the slope, facilitate formulating corresponding measures according to the evaluation results, effectively improve the testing ability and testing effect, and ensure the convenience of testing. During the testing, by setting the first testing impact point A and the second testing impact point B, impact testing can be carried out from different positions, improving the testing effect and facilitating the formulation of standardization or quantification. The selection of the positions of the first testing impact point A and the second testing impact point B can most effectively display the anti-slip and anti-collapse capabilities at the drilled hole. At the same time, for each point, impact forces are applied from different directions to effectively achieve the anti-slip and anti-collapse capabilities under different impacts, which is beneficial to formulating corresponding mandatory protection measures according to the quantification requirements of the testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the testing method of the present invention;

[0025] Figure 2 is a schematic exploded view of the positioning and driving mechanism, drill pipe, and testing rod of the present invention;

[0026] Figure 3 is a three-dimensional structural diagram of the testing rod of the present invention;

[0027] Figure 4 is a schematic front view structural diagram of the testing rod of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0028] The following will combine the attached Figures 1-4 The present invention will be described in detail. The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0029] The present invention provides an improved method for testing the stability of an open-pit mine slope, which is characterized by including the following steps: (1) Select a testing position and drill a testing hole 6: Select a testing position in the middle and lower part of the slope 1, and use drilling equipment to drill a testing hole 6, requiring the testing hole to be horizontally extended and determining the extended depth h of the testing hole 6;

[0030] (2) Measure the slope inclination angle a: Measure the inclination angle a of the slope surface 3 of the upward part of the slope at the testing hole 6;

[0031] (3) Determine the first inspection impact point A: Determine the first inspection impact point A from the position of the inspection hole along the upward inclination direction of the slope. It is required that the distance between the first inspection impact point A and the position of the inspection hole is h * cosa;

[0032] (4) Determine the second inspection impact point B: Determine the second inspection impact point B from the position of the inspection hole along the upward inclination direction of the slope. It is required that the distance between the second inspection impact point B and the position of the inspection hole is (h / 2) * cosa;

[0033] (5) Withdraw the drilling equipment from the inspection hole, and insert the inspection equipment 4 into the inspection hole 6. It is required that the outer diameter of the inspection equipment is smaller than the inner diameter of the inspection hole;

[0034] (6) First, use the impact equipment to apply a vibration impact force in a direction perpendicular to the slope at the first inspection impact point A, and observe whether there is pressure generated by local collapse of the inspection hole around the inspection equipment and the position of the pressure; then, use the impact equipment to apply a vibration impact force in a vertical direction 5 at the first inspection impact point A, and observe whether there is pressure generated by local collapse of the inspection hole around the inspection equipment and the position of the pressure;

[0035] (7) Use the impact equipment to apply a vibration impact force in a direction perpendicular to the slope at the second inspection impact point B, and observe whether there is pressure generated by local collapse of the inspection hole around the inspection equipment and the position of the pressure; then, use the impact equipment to apply a vibration impact force in a vertical direction at the second inspection impact point B, and observe whether there is pressure generated by local collapse of the inspection hole around the inspection equipment and the position of the pressure;

[0036] (8) The inspection equipment records in real time the impact force of the impact equipment, the impact position, and the magnitude and position of the detected pressure, and generates a corresponding relationship;

[0037] (9) Conduct inspections on other inspection positions according to the above method.

[0038] In this embodiment, the inner diameter size of the inspection hole is related to the depth of the inspection hole, and the depth of the inspection hole 6 is greater than 1 m and less than 8 m. For example, when the depth of the inspection hole is 1 - 3 m, the inner diameter of the inspection hole can be selected as 5 - 15 cm; when the depth of the inspection hole is greater than 3 m and less than 5 m, the inner diameter of the inspection hole can be selected as 16 - 25 cm; when the depth of the inspection hole is greater than 5 m and less than 8 m, the inner diameter of the inspection hole 6 can be selected as 26 - 30 cm.

[0039] As a preferred embodiment, the difference between the inner diameter of the inspection hole and the outer diameter of the inspection end of the inspection equipment is 1.5 - 4 cm.

[0040] Among them, when applying the impact force in steps (6)-(7), each application of the impact force is applied at the same frequency, and the applied impact force increases gradually from small to large.

[0041] In the present invention, the drilling device includes a drill pipe 14, wherein the drill pipe 14 is detachably installed on the positioning and driving mechanism, and the inspection device 4 includes an inspection rod, and the inspection rod is also detachably installed on the positioning and driving mechanism.

[0042] The positioning and driving mechanism includes a first positioning plate 9, a second positioning plate 10, a locking and positioning mechanism, a bearing seat 16, a main rotation motor 12, and a rotation interface shaft 15. The first positioning plate 9 and the second positioning plate 10 are arranged in parallel at intervals, and the first positioning plate and the second positioning plate are fixed together by connecting columns. The locking and positioning mechanism is disposed through the first positioning plate and the second positioning plate. The bearing seat 16 is disposed at the center of the second positioning plate. A driving shaft is rotatably disposed in the bearing seat 16. One end of the driving shaft is drivingly connected to the main rotation motor 12, and the other end of the driving shaft is fixedly provided with the rotation interface shaft 15. The main rotation motor 12 is fixed on the second positioning plate. The inspection rod and the drill pipe are both detachably connected to the rotation interface shaft.

[0043] The locking and positioning mechanism includes a plurality of driving nuts 8, driving screws 7, a guide sleeve, and locking columns 11. A plurality of driving nuts 8 are rotatably disposed on the first positioning plate 9. Each driving nut 8 is threadedly connected to a driving screw 7. A driving motor 17 for simultaneously driving each driving nut to rotate is further disposed on the first positioning plate. The driving motor and the driving nut are in gear transmission. The end of the driving screw facing the second positioning plate is integrally and coaxially fixedly provided with the locking column 11. A guide sleeve is disposed on the second positioning plate. The locking column is rotatably and axially slidably passed through the guide sleeve. The end of the locking column is a spiral groove structure or a tip structure.

[0044] The inspection rod includes a cylindrical rod body 13 and an arc-shaped sensing piece group 18. A plurality of the arc-shaped sensing piece groups 18 are arranged at intervals along the axial direction on the cylindrical rod body 13. Each arc-shaped sensing piece group includes a plurality of arc-shaped sensing pieces arranged in a circumferential array on the outer wall of the cylindrical rod body.

[0045] A pressure sensor is disposed between each arc-shaped sensing piece and the outer wall of the cylindrical rod body, and each arc-shaped sensing piece group is correspondingly provided with a number indicating its position. Each arc-shaped sensing piece group includes 4-6 arc-shaped sensing pieces.

[0046] The disclosed method for testing the stability of an open-pit mine slope can effectively evaluate the performance of the slope by setting testing equipment in the drill holes after drilling. This facilitates the formulation of corresponding measures based on the evaluation results, effectively improves the testing ability and testing effect, and ensures the convenience of testing. During the testing process, by setting the first testing impact point A and the second testing impact point B, impact testing can be carried out from different positions, improving the testing effect and facilitating the formulation of standardization or quantification. The selection of the positions of the first testing impact point A and the second testing impact point B can most effectively display the anti-slip and anti-collapse capabilities at the drill hole. At the same time, for each point, impact forces are applied from different directions to effectively achieve the anti-slip and anti-collapse capabilities under different impacts, which is conducive to formulating corresponding mandatory protection measures according to the quantification requirements of the testing.

[0047] The above shows and describes the basic principles, main features, and advantages of the present invention. Moreover, the standard parts used in the present invention can all be purchased from the market. The special-shaped parts can be customized according to the descriptions in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machines, parts, and equipment all adopt conventional models in the prior art. Additionally, the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated herein.

[0048] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An open-pit mine slope stability inspection method, characterized in that, It includes the following steps: (1) Select an inspection position and drill an inspection hole (6): Select an inspection position in the middle and lower part of the slope (1), and use drilling equipment to drill an inspection hole (6). It is required that the inspection hole extends horizontally, and determine the extension depth h of the inspection hole (6). (2) Measure the slope inclination angle a: Measure the inclination angle a of the slope surface (3) of the upper part of the inspection hole (6) facing upward. (3) Determine the first inspection impact point A: Determine the first inspection impact point A along the upward inclined direction of the slope from the position of the inspection hole. It is required that the distance between the first inspection impact point A and the position of the inspection hole is h*cosa. (4) Determine the second inspection impact point B: Determine the second inspection impact point B along the upward inclined direction of the slope from the position of the inspection hole. It is required that the distance between the second inspection impact point B and the position of the inspection hole is (h / 2)*cosa. (5) Withdraw the drilling equipment from the inspection hole, and insert the inspection equipment into the inspection hole. It is required that the outer diameter of the inspection equipment is smaller than the inner diameter of the inspection hole. (6) First, use the impact equipment to apply a vibration impact force in a direction perpendicular to the slope (2) at the first inspection impact point A, and observe whether the periphery of the inspection equipment is subjected to the pressure generated by local collapse of the inspection hole and the position of the pressure; then, use the impact equipment to apply a vibration impact force in a vertical direction (5) at the first inspection impact point A, and observe whether the periphery of the inspection equipment is subjected to the pressure generated by local collapse of the inspection hole and the position of the pressure. (7) Use the impact equipment to apply a vibration impact force in a direction perpendicular to the slope at the second inspection impact point B, and observe whether the periphery of the inspection equipment is subjected to the pressure generated by local collapse of the inspection hole and the position of the pressure; then, use the impact equipment to apply a vibration impact force in a vertical direction at the second inspection impact point B, and observe whether the periphery of the inspection equipment is subjected to the pressure generated by local collapse of the inspection hole and the position of the pressure. (8) The inspection equipment records in real time the impact force of the impact equipment, the impact position, the magnitude and position of the detected pressure, and generates a corresponding relationship. (9) Conduct inspections on other inspection positions according to the above method.

2. The method for testing the stability of an open-pit mine slope according to claim 1, wherein: The inner diameter size of the inspection hole is related to the depth of the inspection hole, and the depth of the inspection hole (6) is greater than 1 m and less than 8 m. When the depth of the inspection hole is 1 - 3 m, the inner diameter of the inspection hole is 5 - 15 cm; when the depth of the inspection hole is greater than 3 m and less than 5 m, the inner diameter of the inspection hole is 16 - 25 cm; when the depth of the inspection hole is greater than 5 m and less than 8 m, the inner diameter of the inspection hole (6) is 26 - 30 cm.

3. The method for testing the stability of an open-pit mine slope according to claim 1, wherein: The difference between the inner diameter of the inspection hole and the outer diameter of the inspection end of the inspection equipment is 1.5 - 4 cm.

4. The method for testing the stability of an open-pit mine slope according to claim 1, wherein: When applying the impact force in steps (6) - (7), each time the impact force is applied at the same frequency, and the applied impact force is increased gradually from small to large.

5. The method for testing the stability of an open-pit mine slope according to claim 1, wherein: The drilling equipment includes a drill pipe (14), wherein the drill pipe (14) is detachably installed on the positioning and driving mechanism, and the inspection equipment includes an inspection rod, and the inspection rod is also detachably installed on the positioning and driving mechanism.

6. The method for testing the stability of an open-pit mine slope according to claim 5, wherein: The positioning and driving mechanism includes a first positioning plate (9), a second positioning plate (10), a locking and positioning mechanism, a bearing seat (16), a main rotating motor (12), and a rotating interface shaft (15). The first positioning plate (9) and the second positioning plate (10) are arranged in parallel at an interval, and the first positioning plate and the second positioning plate are fixed together by connecting columns. The locking and positioning mechanism is disposed through the first positioning plate and the second positioning plate. The bearing seat (16) is disposed at the center of the second positioning plate. A driving shaft is rotatably disposed in the bearing seat (16). One end of the driving shaft is drivingly connected to the main rotating motor (12), and the other end of the driving shaft is fixedly provided with the rotating interface shaft (15). The main rotating motor (12) is fixed on the second positioning plate. The inspection rod and the drill rod are both detachably connected to the rotating interface shaft.

7. The method for testing the stability of an open-pit mine slope according to claim 6, characterized in that: The locking and positioning mechanism includes a plurality of driving nuts (8), driving screws (7), a guide sleeve, and locking columns (11). A plurality of driving nuts (8) are rotatably disposed on the first positioning plate (9). Each driving nut (8) is threadedly connected to one driving screw (7). A driving motor (17) for simultaneously driving each driving nut to rotate is further disposed on the first positioning plate. A gear transmission is adopted between the driving motor and the driving nut. The end of the driving screw facing the second positioning plate is integrally and coaxially fixedly provided with the locking column (11). A guide sleeve is disposed on the second positioning plate. The locking column is rotatably and axially slidably passed through the guide sleeve. The end of the locking column is a spiral groove structure or a tip structure.

8. The method for testing the stability of an open-pit mine slope according to claim 7, characterized in that: The inspection rod includes a cylindrical rod body (13) and an arc-shaped sensing piece group (18). A plurality of the arc-shaped sensing piece groups (18) are arranged at intervals along the axial direction on the cylindrical rod body (13). Each arc-shaped sensing piece group includes a plurality of arc-shaped sensing pieces arranged in a circumferential array on the outer wall of the cylindrical rod body.

9. The method for testing the stability of an open-pit mine slope according to claim 8, wherein: A pressure sensor is disposed between each arc-shaped sensing piece and the outer wall of the cylindrical rod body, and each arc-shaped sensing piece group is correspondingly provided with a number indicating its position.

10. The method for testing the stability of an open-pit mine slope according to claim 9, wherein: Each arc-shaped sensing piece group includes 4-6 arc-shaped sensing pieces.

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