A mining engineering settlement monitoring device

Abstract

The present application provides a kind of mining engineering subsidence monitoring device, it is related to subsidence monitoring technical field, including the outer tube inserted into soil layer and the plug rod slidingly arranged below the inside of outer tube, still including the press bar and drive assembly being arranged above outer tube.The present application is fixed to ground as reference end by outer tube top limiting disc, plug rod bottom insert block is embedded rock layer and moves as moving end with subsidence, cooperates magnetostrictive displacement sensor to detect the relative displacement of both, can accurately detect the subsidence displacement difference between ground and rock layer, significantly improves monitoring precision, by limiting mechanism, outer tube and plug rod are locked, after limiting disc contacts ground, outer tube and plug rod are unlocked, plug rod and insert block are separately moved downward and embedded in rock layer, subsequently, when press bar moves upward, by the clamping block of locking mechanism and the clamping of outer tube limiting slot, combined with spiral spring reset, ensure that monitoring assembly is firmly fixed, does not loosen under mining vibration impact, overall operation is simple, and installation efficiency is high.

Description

A Mining Engineering Settlement Monitoring Device Technical Field

[0001] This invention relates to the field of settlement monitoring technology, and in particular to a settlement monitoring device for mining engineering. Background Technology

[0002] In the field of settlement monitoring in mining engineering, existing technologies mainly monitor surface settlement or deep rock strata settlement separately. For surface settlement, leveling, GPS positioning, or surface displacement sensors are often used to monitor the overall subsidence or deformation of the surface through single or network reference points fixed to the surface. For rock strata settlement, borehole inclinometers, multi-point displacement gauges, and other equipment are typically used to sense displacement changes within the rock strata through probes or casings inserted into the rock strata. While these technologies can achieve settlement monitoring in a single dimension, in actual mining scenarios, the surface and rock strata often settle asynchronously due to differences in geological structure. Existing equipment generally lacks the ability to directly monitor the relative displacement between the surface reference point and the moving rock strata, making it impossible to accurately capture the settlement difference between the two and to comprehensively assess the impact of mining activities on stratum stability.

[0003] Existing settlement monitoring equipment has a single monitoring benchmark, which cannot reflect relative displacement and cannot directly obtain the relative displacement data between the two in the vertical direction. As a result, the monitoring results cannot accurately reflect risk conditions such as "decoupling and displacement between the surface and the rock strata".

[0004] In addition, existing equipment requires the separate installation of surface reference components and rock layer probes, and the manual calibration of their zero points and multiple debugging operations are not convenient. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology, which has the disadvantages of single monitoring and inconvenient operation. The present invention proposes a settlement monitoring device for mining engineering.

[0006] To solve the above-mentioned technical problems, the present invention adopts a settlement monitoring device for mining engineering, comprising: an outer cylinder inserted into the soil layer and an insert rod slidably disposed inside the lower part of the outer cylinder; a pressure rod and a drive assembly disposed above the outer cylinder; a limiting plate disposed at the top of the outer cylinder that contacts the ground and serves as a limiting device; a block for excavating into the soil layer and embedding in the rock layer fixedly connected to the bottom of the insert rod; the pressure rod and drive assembly for driving the insert rod and the block to move downwards; the pressure rod being slidably connected to the outer cylinder; a monitoring assembly for monitoring the settlement displacement of the insert rod and the block disposed at the top of the insert rod; the monitoring assembly comprising a shell that contacts the top of the insert rod; a magnetostrictive displacement sensor disposed inside the shell; the magnetostrictive displacement sensor being suspended and connected to the top of the insert rod; limiting grooves evenly distributed on the inner wall of the outer cylinder; and locking mechanisms corresponding to the limiting grooves disposed on both sides of the upper part of the monitoring assembly; the limiting grooves and locking mechanisms being used to fix the monitoring assembly inside the outer cylinder.

[0007] Furthermore, the cross-section of the insert is an isosceles triangle, the bottom of the insert is pointed, and the top of the insert is the same size as the outer cylinder.

[0008] Furthermore, a slot is provided on the upper part of the outer wall of the insert rod, and the inside of the limiting plate is provided with a movable groove and a sliding groove. The movable groove is connected to the inside of the outer cylinder through the sliding groove. A limiting mechanism is installed inside the movable groove. The limiting mechanism is used to lock the outer cylinder and the insert rod, so that the insert block can carry the outer cylinder into the soil layer.

[0009] Furthermore, the limiting mechanism includes a sliding block that is laterally slidably connected inside the movable groove. The sliding block is provided with a through-groove. A limiting shaft is fixedly connected to the inner side of the sliding block. The limiting shaft passes laterally through the sliding groove and extends into the inner cylinder. A movable shaft is slidably arranged below the inner part of the limiting plate. The bottom of the movable shaft extends to the lower outside of the limiting plate and is fixedly connected to a stop block. A movable rod is fixedly installed at the top of the movable shaft. The movable rod is movably arranged inside the inclined groove and extends from the sliding groove to the inner part of the outer cylinder through the limiting shaft to insert into the slot. At this time, the outer cylinder, the rod, and the block are an integral structure. After the outer cylinder, the rod, and the block have all entered the soil layer, the stop block contacts the ground, causing the movable shaft to drive the movable rod to move, thereby causing the sliding block to slide outward and drive the limiting shaft to leave the limiting groove. Then, the rod and the block are driven downward to fit into the rock layer.

[0010] Furthermore, the top of the insertion rod is provided with a fitting groove, and the bottom end of the magnetostrictive displacement sensor is provided with a connecting part. The side wall of the fitting groove is provided with a fitting part. By connecting the connecting part and the fitting part, the bottom of the outer shell is exactly in contact with the top surface of the insertion rod. When the rock strata subside, the magnetostrictive displacement sensor can accurately monitor the displacement of the insertion rod caused by the insertion block.

[0011] Furthermore, the top of the outer shell is provided with an upper groove, the inner walls on both sides of the upper groove are provided with inner sliding grooves, and the outer wall of the upper groove is provided with an outer sliding groove. The locking mechanism includes a rotating shaft rotatably connected inside the outer shell, one end of the rotating shaft is fixedly connected to a fixed plate, a spiral spring is installed between the fixed plate and the inside of the outer shell, and a rotating rod is installed through the rotating shaft. The locking mechanism also includes a pressing block slidably connected to the inner side of the inner sliding groove and a locking block slidably connected to the outer sliding groove. The pressing block and the locking block are both movably connected to the rotating rod through a shaft. The locking block matches the limiting groove on the inner wall of the outer cylinder to prevent the monitoring component from moving downward on the inner wall of the outer cylinder.

[0012] Furthermore, the diameter of the pressure rod corresponds to the diameter of the inner wall of the outer cylinder. A pressing contact is provided below the pressure rod, and inclined parts are provided on both sides of the pressing contact. The inclined parts are used to insert into the inner side of the pressing block inside the upper groove. When the pressure rod presses the monitoring component downward, it simultaneously presses the insert and rod downward. At the same time, during the process of the inclined part pressing the pressing block, the pressing block moves and drives the locking block to slide inward inside the outer slide groove through the rotating shaft and rotating rod. When the pressure rod pushes the insert and the insert to the designated position, the pressure rod leaves the monitoring component. Under the reset of the spiral spring, the locking block is locked inside the limiting groove to limit the monitoring component.

[0013] Furthermore, the drive assembly includes a fixed cylinder, a motor is installed in the middle of the fixed cylinder, a screw is installed at the output end of the motor, the inside of the pressure rod is provided with a threaded groove corresponding to the screw, and external fixing frames are fixedly installed on both sides of the fixed cylinder, with one bottom end of the external fixing frame fixed to the ground by an anchor.

[0014] Furthermore, a fixing plate is installed at the front and rear lower parts of the fixing cylinder, and a guide rod is set below the fixing plate. A guide groove corresponding to the guide rod is set through the limiting plate. By placing the outer cylinder, the insertion rod and the insertion block on the ground, the monitoring component contacts and is installed with the insertion block. Then, the guide rod passes through the guide groove and is inserted into the ground. The outer fixing frame is then fixed by anchor nails. The bottom of the pressure rod is connected to the monitoring component. By starting the motor, the screw is rotated, which in turn moves the pressure rod downward. This can drive the outer cylinder, the insertion rod, the insertion block and the monitoring component to move downward synchronously. After the limiting plate above the outer cylinder contacts the ground, the pressure rod continues to move downward, driving the insertion rod, the insertion block and the monitoring component to move downward.

[0015] Compared with the prior art, the beneficial effects of the present invention include: the outer cylinder is fixed to the ground surface by a limiting plate at the top as the reference end, and the bottom insert of the rod is embedded in the rock layer and moves with the settlement as the moving end. With the help of a magnetostrictive displacement sensor to detect the relative displacement between the two, the millimeter-level settlement can be captured, which can accurately detect the settlement displacement difference between the ground surface and the rock layer, significantly improving the monitoring accuracy. During installation, the outer cylinder and the rod are locked by a limiting mechanism. After the limiting plate contacts the ground, the outer cylinder and the rod are unlocked, and the rod and the insert move downwards and embed themselves into the rock layer. Then, when the pressure rod moves upwards, it engages with the limiting groove of the outer cylinder by the locking block of the locking mechanism, and is reset by a spiral spring, ensuring that the monitoring component is firmly fixed and can withstand the impact of mining vibration without loosening. The overall operation is simple and the installation efficiency is high. Attached Figure Description

[0016] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0017] Figure 1 schematically shows a structural diagram of a settlement monitoring device for mining engineering according to an embodiment of the present invention;

[0018] Figure 2 schematically shows an overall structural diagram of a mining engineering settlement monitoring device according to an embodiment of the present invention;

[0019] Figure 3 schematically shows a cross-sectional view of a settlement monitoring device for mining engineering according to an embodiment of the present invention;

[0020] Figure 4 schematically shows an exploded view of the structure of a mining engineering settlement monitoring device according to an embodiment of the present invention;

[0021] Figure 5 schematically shows a structural breakdown of the insertion rod, insertion block, monitoring components, and pressure rod of a settlement monitoring device for mining engineering according to an embodiment of the present invention;

[0022] Figure 6 schematically shows an exploded view of the monitoring component structure of a settlement monitoring device for mining engineering according to an embodiment of the present invention;

[0023] Figure 7 schematically shows a cross-sectional view of the structure of a mining engineering settlement monitoring device, including the insertion rod, insertion block, monitoring component, pressure rod, and drive component, according to an embodiment of the present invention.

[0024] The diagram labels are as follows: 1. Outer cylinder; 11. Limiting plate; 12. Limiting groove; 13. Movable groove; 14. Sliding groove; 15. Limiting mechanism; 151. Sliding block; 152. Inclined groove; 153. Limiting shaft; 154. Movable shaft; 155. Movable rod; 156. Abutment block; 16. Guide groove; 2. Insert rod; 21. Fitting groove; 22. Slot; 3. Insert block; 4. Monitoring component; 41. Housing; 411. Upper groove; 412. Inner sliding groove; 413. Outer sliding groove 42. Slot; 43. Magnetostrictive displacement sensor; 44. Joint; 45. Locking mechanism; 46. Rotating shaft; 47. Fixed plate; 48. Spiral spring; 49. Rotating rod; 40. Pressing block; 41. Clamping block; 52. Pressing contact; 53. Inclined part; 64. Drive assembly; 65. External fixing frame; 66. Anchor nail; 67. Fixed cylinder; 68. Fixed plate; 69. Guide rod; 60. Motor; 61. Screw. Detailed Implementation

[0025] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0026] The embodiments of the present invention are illustrated in conjunction with Figures 1-7. As shown in Figures 1-3, a settlement monitoring device for mining engineering includes: an outer cylinder 1 inserted into the soil layer and an insertion rod 2 slidably disposed inside the lower part of the outer cylinder 1; a pressure rod 5 disposed above the outer cylinder 1 and a driving assembly 6; a limiting disc 11 that contacts the ground and serves as a limiting device is disposed at the top of the outer cylinder 1; an insertion block 3 for excavating into the soil layer and embedding in the rock layer is fixedly connected to the bottom of the insertion rod 2; the pressure rod 5 and the driving assembly 6 are used to drive the insertion rod 2 and the insertion block 3 to move downward; and the pressure rod 5 is slidably connected to the outer cylinder 1. The top is provided with a monitoring component 4 for monitoring the settlement displacement of the insertion rod 2 and the insertion block 3. The monitoring component 4 includes a housing 41 that contacts the top of the insertion rod 2. A magnetostrictive displacement sensor 42 is provided inside the housing 41. The magnetostrictive displacement sensor 42 is suspended and connected to the top of the insertion rod 2. Limiting grooves 12 are evenly distributed on the inner wall of the outer cylinder 1. Locking mechanisms 44 corresponding to the limiting grooves 12 are also provided on both sides of the upper part of the monitoring component 4. The limiting grooves 12 and the locking mechanisms 44 are used to fix the monitoring component 4 inside the outer cylinder 1.

[0027] As shown in Figure 2, the cross-section of the insert 3 is an isosceles triangle, the bottom of the insert 3 is pointed, and the top of the insert 3 is the same size as the outer cylinder 1, which facilitates smooth entry into the soil layer without obstruction.

[0028] As shown in Figures 6 and 7, a slot 22 is provided on the upper part of the outer wall of the insertion rod 2. The interior of the limiting plate 11 is provided with a movable slot 13 and a sliding slot 14. The movable slot 13 is connected to the interior of the outer cylinder 1 through the sliding slot 14. A limiting mechanism 15 is movably provided inside the movable slot 13. The limiting mechanism 15 is used to lock the outer cylinder 1 and the insertion rod 2, which makes it easier for the insertion block 3 to carry the outer cylinder 1 into the soil layer. Compared with the prior art, which controls the outer cylinder 1 to enter the soil layer separately, this is more convenient.

[0029] The limiting mechanism 15 includes a sliding block 151 that is laterally slidably connected inside the movable groove 13. The sliding block 151 has a through-slot 152. A limiting shaft 153 is fixedly connected to the inner side of the sliding block 151. The limiting shaft 153 laterally passes through the sliding groove 14 and extends into the outer cylinder 1. A movable shaft 154 is slidably disposed below the interior of the limiting disc 11. The bottom of the movable shaft 154 extends to the lower exterior of the limiting disc 11 and is fixedly connected to a stop block 156. A movable rod 155 is fixedly installed on the top of the movable shaft 154. The movable rod 155 is movably set inside the inclined groove 152. It extends from the sliding groove 14 to the inside of the outer cylinder 1 through the limiting shaft 153 and is inserted into the slot 22. At this time, the outer cylinder 1, the insert rod 2 and the insert block 3 are an integral structure. After the outer cylinder 1, the insert rod 2 and the insert block 3 enter the soil layer, the abutment block 156 contacts the ground, causing the movable shaft 154 to drive the movable rod 155 to move. This causes the sliding block 151 to slide outward, driving the limiting shaft 153 to leave the limiting groove 12. Then, the insert rod 2 and the insert block 3 are driven to move downward to fit into the rock layer.

[0030] As shown in Figures 5 and 6, the top of the insertion rod 2 is provided with a fitting groove 21, and the bottom end of the magnetostrictive displacement sensor 42 is provided with a connecting part 43. The side wall of the fitting groove 21 is provided with a fitting part. By connecting the connecting part 43 with the fitting part, the bottom of the outer shell 41 is exactly in contact with the top surface of the insertion rod 2. When the rock strata subside, the insertion rod 2 is moved by the insertion block 3, and the magnetostrictive displacement sensor 42 can accurately monitor it.

[0031] As shown in Figure 5, the top of the outer shell 41 is provided with an upper groove 411, the inner walls of the upper groove 411 are provided with inner sliding grooves 412, and the outer wall of the upper groove 411 is provided with an outer sliding groove 413. The locking mechanism 44 includes a rotating shaft 441 rotatably connected inside the outer shell 41. One end of the rotating shaft 441 is fixedly connected to a fixed plate 442. A spiral spring 443 is installed between the fixed plate 442 and the inside of the outer shell 41. A rotating rod 444 is installed through the rotating shaft 441. The locking mechanism 44 also includes a pressing block 445 slidably connected to the inner side of the inner sliding groove 412 and a locking block 446 slidably connected to the outer sliding groove 413. The pressing block 445 and the locking block 446 are movably connected to the rotating rod 444 through a shaft. The locking block 446 matches the limiting groove 12 on the inner wall of the outer cylinder 1 and is used to prevent the monitoring component 4 from moving downward on the inner wall of the outer cylinder 1.

[0032] The diameter of the pressure rod 5 corresponds to the diameter of the inner wall of the outer cylinder 1. A pressing contact 52 is provided below the pressure rod 5. Inclined portions 53 are provided on both sides of the pressing contact 52. The inclined portions 53 are used to insert into the inner side of the pressing block 445 in the upper groove 411. When the pressure rod 5 presses down on the monitoring component 4, it simultaneously presses the insert block 3 and the insert rod 2 to move downward. At the same time, during the process of the inclined portion 53 pressing the pressing block 445, the pressing block 445 moves and drives the locking block 446 to slide inward in the inner side of the outer slide groove 413 through the rotating shaft 441 and the rotating rod 444. When the pressure rod 5 pushes the insert rod 2 and the insert block 3 to the designated position, the pressure rod 5 leaves the monitoring component 4. Under the reset of the spiral spring 443, the locking block 446 is locked in the limiting groove 12 to limit the monitoring component 4.

[0033] As shown in Figures 3 and 4, the drive assembly 6 includes a fixed cylinder 63, a motor 66 installed in the middle of the fixed cylinder 63, a screw 67 installed at the output end of the motor 66, a threaded groove 51 corresponding to the screw 67 inside the pressure rod 5, and external fixing frames 61 fixedly installed on both sides of the fixed cylinder 63. One bottom end of the external fixing frame 61 is fixed to the ground by an anchor 62. A fixing plate 64 is also installed at the lower front and rear of the fixed cylinder 63, and a guide rod 65 is provided below the fixing plate 64. A guide groove 16 corresponding to the guide rod 65 is provided through the limiting plate 11. By connecting the outer cylinder 1, Insert rod 2 and insert block 3 are placed on the ground. Monitoring component 4 contacts and is installed with insert block 3. Then, guide rod 65 passes through guide groove 16 and is inserted into the ground. It is then fixed to outer frame 61 by anchor nail 62. The bottom of pressure rod 5 is connected to monitoring component 4. By starting motor 66, screw 67 is rotated, which in turn drives pressure rod 5 to move downward. This can drive outer cylinder 1, insert rod 2, insert block 3 and monitoring component 4 to move downward synchronously. After the limiting plate 11 above outer cylinder 1 contacts the ground, pressure rod 5 continues to move downward, driving insert rod 2, insert block 3 and monitoring component 4 to move downward.

[0034] Specifically, first, ensure that the pressing contact 52 at the bottom of the pressure rod 5 aligns with the upper groove 411 of the monitoring component 4, the monitoring component 4 aligns with the insert block 3, and the slot 22 on the outer wall of the insert rod 2 engages with the limiting shaft 153 of the limiting mechanism 15, so that the outer cylinder 1, the insert rod 2, and the insert block 3 form a temporary integrated structure. The motor 66 drives the screw 67 to rotate, causing the pressure rod 5 to move downward inside the outer cylinder 1, ensuring synchronous movement when the whole structure sinks, and pushing the outer cylinder 1, the insert rod 2, the insert block 3, and the monitoring component 3 together. The measuring component 4 is embedded downwards into the soil layer. After the limiting plate 11 at the top of the outer cylinder 1 contacts the ground surface, it stops moving downwards and is fixed as a ground reference point. After the limiting plate 11 contacts the ground, the abutment block 156 below it is pressed against the ground, pushing the movable shaft 154 upwards. The movable rod 155 at the top of the movable shaft 154 slides in the inclined groove 152 of the sliding block 151, forcing the sliding block 151 to move outwards, causing the limiting shaft 153 to disengage from the slot 22 of the insert rod 2, and the outer cylinder 1 separates from the insert rod 2. The outer cylinder 1 is fixed to the ground surface by the limiting plate 11. The insertion rod 2 and the insertion block 3 can move downward independently. The pressure rod 5 continues to move downward, driving the insertion rod 2 and the insertion block 3 to pass through the soil layer until the tip of the insertion block 3 is embedded in the stable rock layer. The isosceles triangular cross section and tip design of the insertion block 3 reduce the resistance to soil penetration. The top is the same size as the outer cylinder 1 to ensure stability after embedding. Then the pressure rod 5 rises, and the inclined part 53 of the pressure rod 5 leaves the extrusion block 445 in the outer shell 41. The spiral spring 443 resets, causing the locking block 446 to be locked into the limiting groove 12, ensuring that the magnetostrictive displacement sensor 42 is fixed in the outer cylinder 1. When the rock layer settles, the insertion rod 2 drives the moving end of the magnetostrictive displacement sensor 42 of the sensor to descend, generating relative displacement between it and the waveguide wire. The magnetostrictive effect generates stress waves. The displacement difference is calculated by measuring the propagation time of the waves, reflecting the amount of rock layer settlement in real time. The data is transmitted to the ground monitoring system through wired or wireless means to realize real-time acquisition and early warning of settlement data.

[0035] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A settlement monitoring device for mining engineering, characterized in that, include: The system includes an outer cylinder inserted into the soil layer and a slidable insertion rod located below the inner part of the outer cylinder. It also includes a pressure rod and a drive assembly located above the outer cylinder. A limiting disc is located at the top of the outer cylinder, contacting the ground and providing a limiting function. A insertion block for excavating into the soil layer and embedding in the rock layer is fixedly connected to the bottom of the insertion rod. The pressure rod and drive assembly drive the insertion rod and insertion block downwards, and the pressure rod is slidably connected to the outer cylinder. A monitoring assembly for monitoring the settlement displacement of the insertion rod and insertion block is located at the top of the insertion rod. The monitoring assembly includes a housing in contact with the top of the insertion rod, and a magnetostrictive displacement sensor is located inside the housing. The magnetostrictive displacement sensor is suspended from the top of the insertion rod. Limiting grooves are evenly distributed on the inner wall of the outer cylinder. Locking mechanisms corresponding to the limiting grooves are also located on both sides of the upper inner part of the monitoring assembly. The limiting grooves and locking mechanisms are used to fix the monitoring assembly to the outer cylinder. The internal structure includes: a fitting groove at the top of the insertion rod, a connecting part at one bottom end of the magnetostrictive displacement sensor, and a fitting part on the side wall of the fitting groove; a locking mechanism including a rotating shaft rotatably connected inside the housing, a fixed plate fixedly connected to one end of the rotating shaft, a spiral spring installed between the fixed plate and the inside of the housing, a rotating rod through the rotating shaft; a pressing block slidably connected to the inner side of the inner groove and a locking block slidably connected to the outer groove, both the pressing block and the locking block being movably connected to the rotating rod via a shaft; the locking block matching the limiting groove on the inner wall of the outer cylinder to prevent the monitoring component from moving downward on the inner wall of the outer cylinder; the diameter of the pressure rod corresponding to the diameter of the inner wall of the outer cylinder, a pressing contact provided below the pressure rod, and inclined parts provided on both sides of the pressing contact, the inclined parts being used to insert into the upper groove to press the inner side of the pressing block.

2. The settlement monitoring device for mining engineering according to claim 1, characterized in that, The cross-section of the insert is an isosceles triangle, the bottom of the insert is pointed, and the top of the insert is the same size as the outer cylinder.

3. The settlement monitoring device for mining engineering according to claim 1, characterized in that, The upper part of the outer wall of the insertion rod is provided with a slot, and the inside of the limiting plate is provided with a movable groove and a sliding groove. The movable groove is connected to the inside of the outer cylinder through the sliding groove. A limiting mechanism is movably installed inside the movable groove. The limiting mechanism is used to lock the outer cylinder and the insertion rod, so that the insertion block can carry the outer cylinder into the soil layer.

4. A settlement monitoring device for mining engineering according to claim 3, characterized in that, The limiting mechanism includes a sliding block that is laterally slidably connected inside the movable groove. The sliding block is provided with a through-slot. A limiting shaft is fixedly connected to the inner side of the sliding block. The limiting shaft passes laterally through the sliding groove and extends into the inner cylinder. A movable shaft is slidably arranged inside the lower part of the limiting plate. The bottom of the movable shaft extends to the lower outside of the limiting plate and is fixedly connected to a stop block. A movable rod is fixedly installed on the top of the movable shaft. The movable rod is movably arranged inside the inclined groove.

5. A settlement monitoring device for mining engineering according to claim 1, characterized in that, The top of the outer shell is provided with an upper groove, the inner walls on both sides of the upper groove are provided with inner sliding grooves, and the outer wall of the upper groove is provided with an outer sliding groove.

6. A settlement monitoring device for mining engineering according to claim 1, characterized in that, The drive assembly includes a fixed cylinder, a motor is installed in the middle of the fixed cylinder, a screw is installed at the output end of the motor, the inside of the pressure rod is provided with a threaded groove corresponding to the screw, and external fixing frames are fixedly installed on both sides of the fixed cylinder, with one bottom end of the external fixing frame fixed to the ground by an anchor.

7. A settlement monitoring device for mining engineering according to claim 6, characterized in that, A fixing plate is also installed at the lower front and rear of the fixing cylinder, and a guide rod is provided below the fixing plate. A guide groove corresponding to the guide rod is provided through the limiting plate.

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