Deep coal seam long-distance drill hole collapse and wall surface damage detection device
By designing a long-distance drilling detection device for deep coal seams including stress sensors and video collectors, the problem of drilling collapse holes and wall damage detection in deep coal seams is solved, and the accuracy of drilling wall damage is realized is achieved, and the drilling hole formation rate is improved.
Patent Information
- Application Number
- CN202520942903.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-14
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2035-05-14
AI Technical Summary
In deep coal seams, long-distance drilling hole collapse and wall damage detection is difficult to achieve convenient, accurate and non-destructive detection, resulting in difficult to ensure the drilling hole formation rate.
A long-distance drilling hole collapse and wall damage detection device in deep coal seams is designed, including vehicle body, data transmission box, stress sensor, video collector and searchlight. Through the cooperation of stress sensor and video collector, a calculation model for drilling wall damage is established to achieve accurate judgment of mechanical parameters.
The accuracy and comprehensive inspection of the degree of damage of the drilling wall is achieved, ensuring the accuracy of the test results throughout the drilling process, avoiding secondary damage to the drilling hole, and improving the drilling hole formation rate.
Smart Images
Figure CN223004014U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mine borehole construction, in particular to a detection device for borehole collapse and wall surface damage of long-distance boreholes in deep coal seams. Background Technique
[0002] Drilling boreholes in coal and rock masses is a very common operation in coal mines. Many operations such as gas drainage, hydraulic fracturing, hydraulic punching, blasting, and drilling require a large number of boreholes to be constructed for assistance. However, with the continuous increase of the coal mining depth in China, the high ground stress environment in deep mines has led to frequent problems of borehole collapse and wall surface fragmentation in long-distance boreholes, and it is difficult to ensure the borehole formation rate. At present, when coal miners detect borehole collapse and damage, they generally connect a large number of PVC pipes end to end and then insert them into the borehole for testing through the collected images. Such a detection method is time-consuming and laborious, has poor accuracy, and is prone to cause secondary damage to the borehole, and the detection effect is difficult to guarantee. Especially for long-distance boreholes, the above problems are more obvious. Therefore, how to conveniently, accurately, and non-destructively detect borehole collapse and wall surface damage of long-distance boreholes in deep coal seams is one of the important problems to improve the quality of boreholes in deep coal seams.
[0003] Therefore, the utility model proposes a detection device for borehole collapse and wall surface damage of long-distance boreholes in deep coal seams. Content of the Utility Model
[0004] The purpose of the utility model is to provide a detection device for borehole collapse and wall surface damage of long-distance boreholes in deep coal seams to solve the problems raised in the above background technique. To achieve the above purpose, the utility model provides the following technical scheme: A detection device for borehole collapse and wall surface damage of long-distance boreholes in deep coal seams, including a vehicle body,
[0005] Above the vehicle body, there are a data transmission box and a fixed seat. Above the fixed seat, there is an electric push rod. The electric push rod includes a top-out part and a fixed part. At the top of the electric push rod, there is a stress sensor. Outside the stress sensor, there is a first pipe body. The central axis of the end of the first pipe body is aligned with the topmost end of the borehole wall. On the side of the electric push rod, there is an air supply unit for pushing gas outside the first pipe body.
[0006] Preferably, the air supply unit includes a fixed ring on the outer wall of the fixed part. The bottom end of the first pipe body is located above the fixed ring and is fixedly connected to it. On the outer wall of the top-out part, there is a connecting ring. On the outer wall of the connecting ring, there are a pair of L-shaped rods. At the end of the L-shaped rods, there are sliding columns. The ends of the sliding columns pass through the fixed ring and are located inside the first pipe body.
[0007] Preferably, one end of the vehicle body is provided with a connecting column, the end of the connecting column is provided with a central skeleton, a plurality of support skeletons are arranged outside the central skeleton, a hinge shaft is arranged on the outer wall of the connecting column, the support skeleton is rotationally connected to the connecting column through the hinge shaft, a plurality of retractable connecting rods are arranged between the support skeleton and the central skeleton, the support skeleton is movably connected to the central skeleton through the retractable connecting rods, a fixing nail is arranged at the end of the support skeleton, a connecting shaft is arranged between the fixing nail and the support skeleton, a torsion spring is arranged between the connecting shaft and the fixing nail, and the elastic force of the torsion spring pushes the end of the fixing nail to contact with the hole wall.
[0008] Preferably, a second pipe body is further arranged above the fixing ring, there are two sliding columns in total, one of the sliding columns is located inside the first pipe body, the other sliding column is located inside the second pipe body, and the outer walls of the ends of the two sliding columns are respectively in contact with the inner walls of the first pipe body and the second pipe body.
[0009] Preferably, an L-shaped plate is arranged on the outer wall of the fixing part, a protruding rod is arranged on the outer wall of the connecting ring, and a bending groove for the protruding rod to slide is arranged inside the L-shaped plate.
[0010] Preferably, an electric cylinder is arranged inside the fixing seat, a counterweight block with a cone is arranged at the bottom end of the electric cylinder, and the electric push rod is electrically connected to the electric cylinder.
[0011] Preferably, a video collector and a searchlight are arranged above the data transmission box, and the video collector and the searchlight are electrically connected to the data transmission box.
[0012] The utility model at least has the following beneficial effects:
[0013] 1. In the utility model, through the cooperation of the stress sensor, the data transmission box, the video collector and the searchlight, a calculation model for the damage degree of the drilling wall surface is established. By accurately judging the damage degree of the drilling wall surface through mechanical parameters, the overall damage condition of the drilling can be obtained after the whole process of the drilling is tested, realizing the accurate and comprehensive detection of the damage degree of the drilling.
[0014] 2. In the utility model, the ejecting part will drive the two sliding columns to rise simultaneously; on the one hand, the gas inside the first pipe body directly acts on the test area of the hole wall outward, blowing off the attached gravel in this area to ensure the cleanliness of the test wall surface. On the other hand, the gas discharged from the second pipe body will be perpendicular to the stress sensor to blow off the possible gravel at its end. The two cleaning methods cooperate with each other to further ensure that the stress sensor has a clean test environment, which is beneficial to reducing errors and obtaining more accurate measurement data.
[0015] 3. In the utility model, when the vehicle body moves towards the inclined upward drilling, the outer wall of the fixing nail will resist against the inner wall of the end of the support skeleton, and then penetrate into the surrounding wall surface to fix the small detection vehicle to prevent it from sliding, ensuring the stability of the test process. Brief Description of the Drawings
[0016] Figure 1 It is a schematic diagram of the overall structure of the present utility model;
[0017] Figure 2 It is a cross-sectional view of the vehicle body structure of the present utility model;
[0018] Figure 3 It is a schematic diagram of the structure of the air supply unit of the present utility model;
[0019] Figure 4 It is a cross-sectional view of each structure of the air supply unit of the present utility model;
[0020] Figure 5 It is a cross-sectional view of the fixing nail and its accessories of the present utility model.
[0021] In the figure: 1 - vehicle body; 2 - data transmission box; 3 - fixing seat; 4 - electric push rod; 5 - ejecting part; 6 - fixing part; 7 - stress sensor; 8 - pipe body one; 9 - air supply unit; 10 - fixing ring; 11 - connecting ring; 12 - L-shaped rod; 13 - sliding column; 14 - connecting column; 15 - central skeleton; 16 - support skeleton; 17 - hinge shaft; 18 - retractable connecting rod; 19 - fixing nail; 20 - connecting shaft; 21 - torsion spring; 22 - pipe body two; 23 - L-shaped plate; 24 - extending rod; 25 - bending groove; 26 - electric cylinder; 27 - counterweight; 28 - video collector; 29 - searchlight. Detailed Embodiment
[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0023] Please refer to Figures 1-5 , the present utility model provides a technical solution: a device for detecting borehole collapse and wall surface damage in long-distance deep coal seams, including:
[0024] Embodiment 1
[0025] Vehicle body 1 is driven by a power module on the vehicle body. Above the vehicle body 1, there are a data transmission box 2 and a fixing seat 3. Both the data transmission box 2 and the fixing seat 3 are fixedly connected to the vehicle body 1. Above the data transmission box 2, there are a video collector 28 and a searchlight 29 which are fixedly connected to it. The video collector 28 and the searchlight 29 are electrically connected to the data transmission box 2. Above the fixing seat 3, there is an electric push rod 4 which is fixedly connected to it. The electric push rod 4 includes an ejecting part 5 and a fixing part 6. At the top end of the electric push rod 4, there is a stress sensor 7 which is fixedly connected to it. The end of the stress sensor 7 has elasticity. The data transmission box 2 can summarize and process the videos and data collected by the video collector 28 and the stress sensor 7.
[0026] The process and principle of stress testing on the borehole wall:
[0027] The vehicle body 1 can move in the borehole under the remote control of the operator. At regular intervals, the mechanical values of the borehole wall surface are measured through pressure testing, and at the same time, the images of the borehole wall surface are collected in real time through the video collector 28. The data transmission box 2 transmits the measured mechanical data and image data to the work control console.
[0028] The electric push rod 4 above the fixing seat 3 controls the up and down telescoping of the stress sensor 7. The stress sensor 7 can deform within a small range and has a built-in stress testing function. It can measure the stress value between the stress sensor 7 and the borehole wall surface when it is squeezed against the wall surface. During the mechanical testing of the wall surface, the operator controls the elongation feed rate of the stress sensor 7 through the console. When the stress sensor 7 contacts the borehole wall surface, the stress data can be collected in real time until the stress sensor 7 reaches the maximum deformation amount and the elongation feed no longer increases. Thus, the evolution curve of the test stress F at the wall surface with the feed amount L is obtained. From the curve, the maximum feed amount Li and the maximum stress Fi at the wall surface can be obtained, and further the stress gradient dF / dL curve can be calculated. Denote the length of the stress sensor 7 from the borehole wall surface at the start of the test as Δdi, and the number of times that dF / dL changes from a positive value to a negative value as ki. According to the above parameters, the breakage degree Xi of the wall surface is calculated, and the calculation formula is shown in Equation 1. The operator can analyze the borehole collapse and breakage degree at the wall surface based on the breakage degree Xi and the image data.
[0029] Equation 1
[0030] In Equation 1, the units of Li and Δdi are mm, and the unit of Fi is MPa. When Xi < -0.5, it indicates that deformation occurs at the wall surface and the wall surface bulges towards the inside of the borehole. The smaller the value, the more serious the deformation. When -0.5 ≤ Xi ≤ 0.5, it shows that the state of the wall surface is relatively stable. When 0.5 < Xi, it indicates that the wall surface is broken, and the larger the value, the greater the degree of breakage.
[0031] The vehicle body 1 conducts mechanical tests at regular intervals during drilling. A relatively optimal interval distance is 1 m. After completing the mechanical tests for the entire drilling process, the overall situation of borehole collapse and wall surface damage can be obtained. Compared with the prior art, a calculation model for the damage degree of the drilling wall surface is established. The damage degree of the drilling wall surface can be accurately determined through mechanical parameters. After completing the tests for the entire drilling process, the overall damage situation of the drilling can be obtained, realizing the accurate and comprehensive detection of the damage degree of the drilling.
[0032] In addition, an electric cylinder 26 is provided inside the fixed seat 3 and is fixedly connected thereto. A counterweight 27 with a cone is provided at the bottom end of the electric cylinder 26. The counterweight 27 is slidably connected to the vehicle body 1. The bottom end of the electric cylinder 26 is fixedly connected to the counterweight 27. The electric push rod 4 is electrically connected to the electric cylinder 26. After the electric push rod 4 is started, the electric cylinder 26 will start automatically and push the counterweight 27 to move downward until the cone at the bottom of the counterweight 27 is inserted into the ground of the borehole. Stress tests can be carried out in this state to ensure the stability of the vehicle body 1 to the greatest extent and make the test data more accurate.
[0033] A pipe body 1 is provided outside the stress sensor 7. The central axis of the end of the pipe body 1 is aligned with the topmost end of the borehole wall. A gas supply unit 9 for pushing gas outside the pipe body 1 is provided on the side of the electric push rod 4. The gas discharged through the pipe body 1 can clean the crushed stones on the borehole wall surface detected by the stress sensor 7, further ensuring the accuracy of the measurement data. The gas supply unit 9 includes a fixing ring 10 on the outer wall of the fixing part 6. The fixing ring 10 is rotatably connected to the fixing part 6. The bottom end of the pipe body 1 is located above the fixing ring 10 and is fixedly connected thereto. A connecting ring 11 is provided on the outer wall of the ejecting part 5 and is rotatably connected thereto. A pair of L-shaped rods 12 are provided on the outer wall of the connecting ring 11 and are fixedly connected thereto. A sliding column 13 is provided at the end of the L-shaped rod 12 and is fixedly connected thereto. The end of the sliding column 13 passes through the fixing ring 10 and is located inside the pipe body 1. The sliding column 13 is slidably connected to the fixing ring 10. A pipe body 22 is also provided above the fixing ring 10 and is fixedly connected thereto. There are two sliding columns 13 in total. One sliding column 13 is located inside the pipe body 1 and is slidably connected thereto. The other sliding column 13 is located inside the pipe body 22 and is slidably connected thereto. And the outer walls of the ends of the two sliding columns 13 are in contact with the inner walls of the pipe body 1 and the pipe body 22 respectively. In addition, an L-shaped plate 23 is provided on the outer wall of the fixing part 6 and is fixedly connected thereto. An extending rod 24 is provided on the outer wall of the connecting ring 11 and is fixedly connected thereto. A curved groove 25 for the extending rod 24 to slide is provided inside the L-shaped plate 23.
[0034] The working principle of crushed stone cleaning:
[0035] In the preparation stage of the stress test, the ejecting part 5 of the electric push rod 4 will drive the connecting ring 11 and the L-shaped rod 12 to move upward, and then drive the two sliding columns 13 to rise simultaneously. On the one hand, the rising sliding column 13 inside the first pipe body 8 will send the gas inside it outward and directly act on the test area of the hole wall, blowing off the attached gravel in this area to ensure the cleanliness of the test wall surface. On the other hand, the rising sliding column 13 inside the second pipe body 22 will also push the gas out and be perpendicular to the stress sensor 7, blowing off the possible gravel at the end of the stress sensor 7 during the rising process of the stress sensor 7. The two cleaning methods cooperate with each other to further ensure that the stress sensor 7 has a clean test environment, which is beneficial to reducing errors and obtaining more accurate measurement data.
[0036] In addition, during the upward movement of the ejecting part 5, the extending rod 24 fixedly connected to the connecting ring 11 will slide upward in the bending groove 25 of the L-shaped plate 23. As the extending rod 24 slides in the bending groove 25, the extending rod 24 will drive the connecting ring 11 to rotate reciprocally in the left-right direction on the outer wall of the ejecting part 5. Further, the connecting ring 11 will also drive the L-shaped rod 12, the fixing ring 10, the first pipe body 8 and the second pipe body 22 to rotate reciprocally on the outer wall of the fixing part 6 until the extending rod 24 bends and disengages from the bending groove 25. This process will be more conducive to the divergence of the gas discharged from the first pipe body 8 and the second pipe body 22 in the left-right direction, and then make the blowing area of the gas wider, further ensuring the cleanliness of the test environment.
[0037] According to the above embodiment, Embodiment Two
[0038] One end of the vehicle body 1 is provided with a connecting column 14 and fixedly connected thereto. The end of the connecting column 14 is provided with a central skeleton 15 and fixedly connected thereto. A plurality of support skeletons 16 are arranged outside the central skeleton 15. The outer wall of the connecting column 14 is provided with a hinge shaft 17 and fixedly connected thereto. The support skeletons 16 are rotationally connected to the connecting column 14 through the hinge shaft 17. A plurality of contraction connecting rods 18 are arranged between the support skeletons 16 and the central skeleton 15. The support skeletons 16 are movably connected to the central skeleton 15 through the contraction connecting rods 18. The end of the support skeleton 16 is provided with a fixing nail 19. A connecting shaft 20 is arranged between the fixing nail 19 and the support skeleton 16. Both ends of the connecting shaft 20 are fixedly connected to the support skeleton 16. The fixing nail 19 is rotationally connected to the connecting shaft 20. A torsion spring 21 is arranged between the connecting shaft 20 and the fixing nail 19. Both ends of the torsion spring 21 are fixedly connected to the connecting shaft 20 and the fixing nail 19 respectively. The elastic force of the torsion spring 21 pushes the end of the fixing nail 19 to contact the hole wall.
[0039] Working principle:
[0040] After multiple support skeletons 16 are opened, the fixing nails 19 contact the wall surface of the drill hole, forming a conical structure. When the vehicle body 1 moves deeper into the drill hole, the fixing nails 19 slide on the surrounding wall surface under the elastic force of the torsion springs 21 to ensure the stability of the movement of the vehicle body 1. When the vehicle body 1 moves towards the inclined upward drill hole, if it moves backward under the influence of gravity, the outer wall of the fixing nail 19 will resist against the inner wall of the end of the support skeleton 16, and then penetrate into the surrounding wall surface to fix the small detection vehicle and prevent it from sliding, ensuring the stability of the test process; after the small detection vehicle completes the detection of borehole collapse and wall surface damage, the multiple support skeletons 16 can be remotely retracted, and the vehicle body 1 can smoothly move towards the roadway direction.
[0041] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device.
[0042] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A device for detecting long-distance drilling collapse and wall damage in deep coal seams, comprising a vehicle body (1), characterized in that: A data transmission box (2) and a fixing seat (3) are provided above the vehicle body (1); an electric push rod (4) is provided above the fixing seat (3); the electric push rod (4) comprises an ejection portion (5) and a fixing portion (6); a stress sensor (7) is provided at the top end of the electric push rod (4); a tube body (8) is provided outside the stress sensor (7); the central axis of the end of the tube body (8) is aligned with the top end of the borehole wall; and a gas supply unit (9) for pushing gas to the outside of the tube body (8) is provided on the side of the electric push rod (4).
2. The deep coal seam long-distance drilling hole collapse and wall damage detection device according to claim 1 is characterized by: The air supply unit (9) comprises a fixing ring (10) located on the outer wall of the fixing portion (6); the bottom end of the tube body (8) is located above the fixing ring (10) and is fixedly connected thereto; the outer wall of the ejection portion (5) is provided with a connecting ring (11); the outer wall of the connecting ring (11) is provided with a pair of L-shaped rods (12); the ends of the L-shaped rods (12) are provided with sliding columns (13); the ends of the sliding columns (13) pass through the fixing ring (10) and are located inside the tube body (8).
3. The deep coal seam long-distance drilling hole collapse and wall damage detection device according to claim 1 is characterized by: A connecting column (14) is provided at one end of the vehicle body (1), a central frame (15) is provided at the end of the connecting column (14), a plurality of supporting frames (16) are provided outside the central frame (15), a hinge shaft (17) is provided on the outer wall of the connecting column (14), the supporting frame (16) is rotatably connected to the connecting column (14) via the hinge shaft (17), a plurality of retractable connecting rods (18) are provided between the supporting frame (16) and the central frame (15), the supporting frame (16) is movably connected to the central frame (15) via the retractable connecting rods (18), a fixing nail (19) is provided at the end of the supporting frame (16), a connecting shaft (20) is provided between the fixing nail (19) and the supporting frame (16), a torsion spring (21) is provided between the connecting shaft (20) and the fixing nail (19), and the elastic force of the torsion spring (21) pushes the end of the fixing nail (19) to contact the hole wall.
4. The deep coal seam long-distance drilling hole collapse and wall damage detection device according to claim 2 is characterized by: A second tube body (22) is also provided above the fixing ring (10). There are two slide posts (13), one of which is located inside the first tube body (8) and the other slide post (13) is located inside the second tube body (22). The outer walls of the ends of the two slide posts (13) are in contact with the inner walls of the first tube body (8) and the second tube body (22) respectively.
5. The deep coal seam long-distance drilling hole collapse and wall damage detection device according to claim 4 is characterized by: An L-shaped plate (23) is provided on the outer wall of the fixing portion (6), a protruding rod (24) is provided on the outer wall of the connecting ring (11), and a curved groove (25) for the protruding rod (24) to slide is provided inside the L-shaped plate (23).
6. The deep coal seam long-distance drilling hole collapse and wall damage detection device according to claim 1 is characterized by: An electric cylinder (26) is provided inside the fixing seat (3), a counterweight block (27) with a cone is provided at the bottom end of the electric cylinder (26), and the electric push rod (4) is electrically connected to the electric cylinder (26).
7. The deep coal seam long-distance drilling hole collapse and wall damage detection device according to claim 1 is characterized by: A video collector (28) and a searchlight (29) are provided above the data transmission box (2), and the video collector (28) and the searchlight (29) are electrically connected to the data transmission box (2).