A double-end water plugging device for measuring the height of a water conducting fracture zone and a working method thereof

Abstract

The application discloses a double-end water plugging device and working method for measuring water fracture zone height, which comprises a water injection hose, a water injection probe and a plugging capsule; the plugging capsule comprises a capsule shell, a center support pipe, a remote control motor, a lead screw, a support top plate and a mechanical arm; when plugging, the remote control motor is positively rotated to drive the lead screw to positively rotate, at this time, two nuts are moved along the lead screw in opposite directions, and then the two mechanical arms push the support top plate to expand outward to press the capsule shell, so that the capsule is inflated to plug the drilling hole; when the capsule needs to be reset after measurement, the remote control motor is reversely rotated to drive the lead screw to reversely rotate, so that the two nuts are moved along the lead screw in opposite directions, and then the two mechanical arms pull the support top plate to contract inward, so that the capsule is contracted to reset; the device does not need to additionally set a special water injection pipeline, so that the operation stability of the plugging device is ensured; and the device is not affected by the depth of the drilling hole, and the sealing effect of the drilling hole is kept at different depths.

Description

Technical Field

[0001] This invention relates to a double-ended water-blocking device and its working method for measuring the height of water-conducting fracture zones, belonging to the technical field of mining rock strata condition detection and inspection equipment. Background Technology

[0002] After the coal mine working face is mined, the overlying strata in the goaf sequentially form a caving zone, a fracture zone, and a tortuous subsidence zone from bottom to top. Because the water-conducting fracture zone provides excellent water-conducting channels, determining its development height is crucial for ensuring working face safety and maintaining the balance of the surface ecological environment when mining under water bodies or on ecologically fragile surfaces. The double-end sealing leak detection system is a specialized device for measuring the development height of water-conducting fracture zones. This method involves selecting a suitable observation location around the coal mine working face, such as excavating a drilling site in a section of the horizontal roadway adjacent to the working face, or in a roadway outside the stop line or cut-out of the working face being measured. An inclined borehole is drilled upwards towards the goaf, avoiding the caving zone and diagonally traversing the entire fracture zone, reaching a certain height above the expected top boundary of the fracture zone. Then, a double-end sealing leak detection device is used to seal and inject water along the borehole in sections. First, a section within the borehole is sealed with two sealing devices, and then a certain amount of water is injected into that section. By measuring the water loss rate within a section of the borehole, it can be determined whether that section is located within a fracture zone. (Since both ends of this section of the borehole are sealed, the injected water can only drain through the fractures in the borehole wall. Since there are more fractures within the fracture zone than outside it, measuring the water loss rate and comparing it to a threshold value allows for determination of whether the borehole section is within a fracture zone.) This measurement process is repeated for each section of the borehole to understand the fracturing and loosening of the surrounding rock, thereby determining the upper limit height of the fracture zone. This method effectively determines the height of the fracture zone, but the following problems still exist during its use:

[0003] First, the plugging devices currently used are all water-injection type plugging devices. That is, when plugging is required, water is injected into the plugging device through an additional water injection pipeline to make it expand, thereby achieving the purpose of plugging. Therefore, during the probe, the plugging device will extend into the borehole along with the probe rod, and the water injection pipeline used to inject water for it must also enter the borehole. As the probe depth increases, the extension distance of the water injection pipeline will also increase. This will cause the water injection pipeline to easily rub and squeeze against the borehole wall and the drill rod, resulting in pipeline damage and breakage, ultimately causing the plugging device to fail.

[0004] Secondly, since the expansion and contraction of the plug are achieved by injecting or pumping water into the plug through the water injection pipeline, a high-power water pump needs to be installed outside the borehole to ensure that the water injection pressure and pumping efficiency meet the requirements of the detection. Furthermore, as the plug extends deeper into the borehole, the extension distance of the water injection pipeline also increases, eventually requiring the water pump to apply greater water injection pressure to make the plug reach the required expansion state. If the water injection pressure does not meet the requirements, the plug will not seal the borehole tightly, causing water to flow out from the gap between the plug and the borehole when water is subsequently injected into that section of the borehole, ultimately leading to inaccurate measurement results.

[0005] Therefore, providing a device and method that not only eliminates the need for additional water injection pipelines for the plug, thus avoiding friction and compression between the water injection pipeline and the borehole wall and drill rod, ensuring the operational stability of the plug, but also maintains the sealing effect at various depths regardless of the depth of penetration into the borehole, is one of the technical problems that this industry needs to solve. Summary of the Invention

[0006] To address the problems existing in the prior art, the present invention provides a double-ended water-blocking device and its working method for measuring the height of water-conducting fracture zones. This not only eliminates the need for additional pipelines specifically designed for water injection into the plug, thus avoiding friction and compression between the water injection pipeline and the borehole wall and drill rod, ensuring the operational stability of the plug; but also maintains the sealing effect at various depths of the borehole regardless of the depth into which it penetrates.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is: a double-ended water-blocking device for measuring the height of a water-conducting fracture zone, comprising a water injection hose, a water injection probe, and two sealing capsules;

[0008] The sealing capsule includes a capsule shell, a central support tube, a remote-controlled motor, a lead screw, a support top plate, and a robotic arm. The capsule shell is cylindrical, with the central support tube passing through it and its two ends located on opposite sides of the capsule shell's exterior. The central support tube is positioned on the central axis of the capsule shell. The remote-controlled motor is fixed to the outer surface of the central support tube inside the capsule shell. The lead screw is mounted on the outer surface of the central support tube via a bearing mounting seat, and the lead screw is parallel to the central support tube. One end of the lead screw is coaxially connected to the output shaft of the remote-controlled motor, enabling the motor to drive the lead screw to rotate relative to the bearing mounting seat. The lead screw has threads on it. The capsule has a left-hand thread and a right-hand thread, with a nut installed on each thread. Two robotic arms are located inside the capsule shell, along with the supporting top plate. One end of each robotic arm is hinged to a nut, and the other end is hinged to a connecting seat on the supporting top plate. When the screw rotates forward, the two nuts move towards each other along the screw, causing the robotic arms to push the supporting top plate outward, applying pressure to the capsule shell and inflating it. When the screw rotates in reverse, the two nuts move away from each other along the screw, causing the robotic arms to pull the supporting top plate inward, causing the capsule to contract and reset.

[0009] The water injection probe is located between the two sealing capsules, and both ends of the water injection probe are fixedly connected to the two sealing capsules respectively. The water injection probe is a cylindrical shape with a water injection port at one end. Multiple water outlet holes are opened on the outer circumference of the water injection probe. One end of the water injection hose passes through the central support tube of the sealing capsule near the water injection port and is connected to the water injection port.

[0010] Furthermore, there are three remote-controlled motors, three lead screws, and three supporting top plates. These three motors and lead screws are evenly distributed on the outer surface of the central support tube. All three supporting top plates are arc-shaped, and when not expanded, they form a cylindrical shape within the capsule shell. This structure ensures that the sealing capsule expands evenly in all directions when it expands, thereby further improving its sealing effect on the borehole.

[0011] Furthermore, each of the three supporting top plates is equipped with multi-layer connecting plates at their adjacent joints, with the multi-layer connecting plates between adjacent supporting top plates being staggered. With this arrangement, the three supporting top plates are interlocked when not expanding; during expansion, all three supporting top plates expand outwards, at which point the multi-layer connecting plates gradually separate, allowing the three supporting top plates to expand synchronously and collaboratively, further improving their sealing effect on the borehole.

[0012] Furthermore, a mobile power supply is installed inside the central support tube, which powers the remote-controlled motor. With this design, when the mobile power supply needs to be replaced or recharged after use, there is no need to disassemble the entire sealing capsule; simply remove the mobile power supply from the central support tube for convenient use.

[0013] Furthermore, the capsule shell is made of rubber. This material has high elastic deformation capacity, so when the sealing capsule expands to seal the borehole, if the borehole deforms, its elastic deformation capacity will also adapt, thus ensuring the continuous sealing effect of the sealing capsule on the borehole after expansion.

[0014] The working method of the above-mentioned double-ended water-blocking device for measuring the height of the water-conducting fracture zone includes the following specific steps:

[0015] A. First, select a suitable observation site, and drill an upward-sloping borehole into the area of ​​the water-conducting fracture zone to be measured. After the borehole reaches a certain height above the expected top boundary of the water-conducting fracture zone, the drilling construction is completed.

[0016] B. Assemble the double-ended water-blocking device, and connect one end of the water injection hose through the central support tube of the sealing capsule near the water injection port to the water injection port. Then, push the double-ended water-blocking device into the borehole through the push rod, and make the other end of the water injection hose outside the borehole and connect it to the water pump to complete the installation of the device.

[0017] C. When starting the measurement, first set multiple measurement points at different depths according to the borehole depth, and set the water leakage flow threshold. Select the measurement point closest to the borehole opening, and push the double-ended water-blocking device to the measurement point through the push rod, so that the measurement point is between the two sealing capsules. At this time, stop pushing the double-ended water-blocking device. Start the remote control motor to rotate forward through the remote control end. At this time, the remote control motor drives the lead screw to rotate forward. Since part of the thread on the lead screw is left-handed and the other part is right-handed, the two nuts move closer to each other along the lead screw, thereby causing one end of the two robotic arms to move closer to each other and push the support plate to expand outward to apply pressure to the capsule shell. After the remote control motor continues to work for a certain period of time, it stops, realizing the capsule expansion process. At this time, the two sealing capsules seal the measurement point in this section of the borehole.

[0018] D. Start the water pump and inject water into the injection probe through the injection hose. The injected water is discharged into the borehole section through the outlet hole. Record the injected water volume and measure the water leakage flow rate of the borehole section over a period of time. Compare the measured leakage flow rate with the set water leakage flow rate threshold. If it exceeds the threshold, that is, the water leakage flow rate is large (there are many water-conducting fractures in the borehole wall of this section), it indicates that the measurement point is within the water-conducting fracture zone. If it does not exceed the threshold, that is, the water leakage flow rate is small (there are few water-conducting fractures in the borehole wall of this section). If the result is negative, it indicates that the measurement point is not within the water-conducting fracture zone. After recording the result, the remote control motor is started to rotate in the opposite direction via the remote control terminal. At this time, the remote control motor drives the lead screw to rotate in the opposite direction, causing the two nuts to move away from each other along the lead screw. This causes one end of the two robotic arms to move away from each other and pull the support plate inward, causing the capsule shell to shrink. The remote control motor continues to work for a certain period of time and then stops, realizing the capsule shrinkage and reset process. At this time, the remaining water in this section of the borehole flows out along the borehole, completing the measurement work of this measurement point.

[0019] E. Select another measurement point and repeat steps C and D to complete the measurement work at that point. Repeat this process multiple times to allow the double-ended water-blocking device to continue to penetrate deep into the borehole and measure each measurement point in turn until the measurement results of two consecutive measurement points are both outside the water-conducting fracture zone. Then stop the measurement work and remove the double-ended water-blocking device from the borehole.

[0020] F. Based on the results of each measurement point and its depth location, the height of the water-conducting fracture zone being measured can be determined.

[0021] Compared with the prior art, the present invention adopts a combination of a water injection hose, a water injection probe, and two sealing capsules, which has the following advantages:

[0022] 1. When the sealing capsule used in this invention expands and seals, the remote control motor rotates forward, driving the lead screw to rotate forward as well. At this time, the two nuts move towards each other along the lead screw, which in turn causes the two robotic arms to push the support plate outward to apply pressure to the capsule shell, thereby expanding the capsule to seal the borehole. When the capsule needs to be reset after measurement, the remote control motor rotates in reverse, driving the lead screw to rotate in reverse as well. This causes the two nuts to move away from each other along the lead screw, which in turn causes the two robotic arms to pull the support plate inward, thereby shrinking and resetting the capsule. This method eliminates the need for an additional pipeline specifically for injecting water into the sealing device, thus avoiding friction and compression between the water injection pipeline and the borehole wall and drill rod, ensuring the operational stability of the sealing device.

[0023] 2. Since the sealing capsule used in this invention does not expand and seal through water injection, it is not affected by the depth of penetration into the borehole, the length of the water injection pipeline, or the water injection pressure. Therefore, it can maintain the sealing effect of the borehole at various depths. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the layout of the double-ended water-blocking device in operation according to the present invention;

[0025] Figure 2 This is an axial sectional view of the sealing capsule in this invention;

[0026] Figure 3 This is a radial cross-sectional view of the sealing capsule in this invention.

[0027] In the diagram: 1. Sealing capsule, 1-1. Capsule shell, 1-2. Supporting top plate, 1-3. Robotic arm, 1-4. Nut, 1-5. Lead screw, 1-6. Remote control motor, 1-7. Central support tube, 2. Water injection probe, 3. Water injection hose. Detailed Implementation

[0028] The present invention will be further described below.

[0029] like Figure 1 As shown, a double-ended water-blocking device for measuring the height of a water-conducting fracture zone includes a water injection hose 3, a water injection probe 2, and two sealing capsules 1;

[0030] like Figure 2 and 3As shown, the sealing capsule 1 includes a capsule shell 1-1, a central support tube 1-7, a remote control motor 1-6, a lead screw 1-5, a support top plate 1-2, and a robotic arm 1-3; the capsule shell 1-1 is made of rubber. This material is chosen because it has high elastic deformation capacity. When the sealing capsule expands to seal the borehole, if the borehole deforms, its elastic deformation capacity will also adapt, thus ensuring the continuous sealing effect of the sealing capsule 1 on the borehole after expansion. The capsule shell 1-1 is cylindrical. A central support tube 1-7 passes through the capsule shell 1-1, with both ends located on the outside of the capsule shell 1-1, and the central support tube 1-7 is located on the central axis of the capsule shell 1-1. A remote control motor 1-6 is fixed to the outer surface of the central support tube 1-7 inside the capsule shell 1-1. A lead screw 1-5 is mounted on the outer surface of the central support tube 1-7 through a bearing mounting seat, and the lead screw 1-5 is parallel to the central support tube 1-7. One end of the lead screw 1-5 is coaxially connected to the output shaft of the remote control motor 1-6, so that the remote control motor 1-6 can drive the lead screw 1-5 to rotate relative to the bearing mounting seat. The lead screw 1-5 has a left-hand thread and a right-hand thread, and a nut 1-4 is installed on each of the left-hand and right-hand threads. There are two robotic arms 1-3, and both robotic arms 1-3 and the supporting top plate 1-2 are located inside the capsule shell 1-1. -3 is hinged at one end to two nuts 1-4 and at the other end to the connecting seat of the supporting top plate 1-2. When the lead screw 1-5 rotates in the forward direction (forward rotation can be defined as clockwise or counterclockwise rotation, set as needed), it causes the two nuts 1-4 to move towards each other along the lead screw 1-5, thereby causing the two robotic arms 1-3 to push the supporting top plate 1-2 outward to apply pressure to the capsule shell 1-1, thus achieving capsule expansion. When the lead screw 1-5 rotates in the reverse direction, it causes the two nuts 1-4 to move away from each other along the lead screw 1-5, thereby causing the two robotic arms 1-3 to pull the supporting top plate 1-2 inward, thus achieving capsule contraction and reset. There are three remote control motors 1-6, lead screws 1-5, and supporting top plates 1-2. The three remote control motors 1-6 and lead screws 1-5 are evenly distributed on the outer surface of the central support tube 1-7. The three supporting top plates 1-2 are all arc-shaped, and when not expanded, the three supporting top plates 1-2 form a cylindrical shape inside the capsule shell 1-1. This structure ensures that the sealing capsule 1 expands uniformly in all directions when it expands, thereby further improving its sealing effect on the borehole. Each of the three supporting top plates 1-2 has multiple layers of connecting plates at their adjacent joints, with the connecting plates between adjacent supporting top plates 1-2 being staggered. With this arrangement, the three supporting top plates 1-2 are interlocked when not inflated; during expansion, all three supporting top plates 1-5 expand outwards, at which point the multiple layers of connecting plates gradually separate, allowing for better synchronous and coordinated outward expansion of the three supporting top plates 1-5, further improving its sealing effect on the borehole.

[0031] The water injection probe 2 is located between the two sealing capsules 1, and both ends of the water injection probe 2 are fixedly connected to the two sealing capsules 1 respectively. The water injection probe 2 is a cylindrical shape with a water injection port at one end. Multiple water outlet holes are opened on the outer circumference of the water injection probe 2. One end of the water injection hose 3 passes through the central support tube 1-7 of the sealing capsule 1 near the water injection port and is connected to the water injection port.

[0032] As an improvement of the present invention, a mobile power supply is installed inside the central support tube 1-7, which powers the remote control motors 1-6. With this arrangement, when the mobile power supply needs to be replaced or recharged after use, it is not necessary to disassemble the entire sealing capsule 1; simply remove the mobile power supply from the central support tube 1-7, making it convenient to use.

[0033] The water injection probe 2, remote control motor 1-6, lead screw 1-5, support top plate 1-2, mobile power supply and robotic arm 1-3 mentioned above are all existing parts that can be purchased directly from the market.

[0034] The working method of the above-mentioned double-ended water-blocking device for measuring the height of the water-conducting fracture zone includes the following specific steps:

[0035] A. First, select a suitable observation site, and drill an upward-sloping borehole into the area of ​​the water-conducting fracture zone to be measured. After the borehole reaches a certain height above the expected top boundary of the water-conducting fracture zone, the drilling construction is completed.

[0036] B. Assemble the double-ended water-blocking device, and pass one end of the water injection hose 3 through the central support tube 1-7 of the sealing capsule 1 near the water injection port to connect with the water injection port. Then, push the double-ended water-blocking device into the borehole through the push rod, and make the other end of the water injection hose 3 outside the borehole and connect it to the water pump to complete the installation of the device.

[0037] C. When starting the measurement, first set multiple measurement points at different depths according to the drilling depth, and set the water leakage flow threshold. Select the measurement point closest to the borehole opening, and push the double-ended water-blocking device to the measurement point through the push rod, so that the measurement point is between the two sealing capsules 1. At this time, stop pushing the double-ended water-blocking device. Start the remote control motor 1-6 to rotate forward through the remote control end. At this time, the remote control motor 1-6 drives the lead screw 1-5 to rotate forward. Since part of the thread direction on the lead screw 1-5 is left-hand thread and the other part is right-hand thread, the two nuts 1-4 move closer to each other along the lead screw 1-5, thereby causing one end of the two robotic arms 1-3 to move closer to each other and push the support plate 1-2 to expand outward and apply pressure to the capsule shell 1-1. The remote control motor 1-6 continues to work for a certain period of time and then stops, realizing the capsule expansion process. At this time, the two sealing capsules 1 seal the measurement point in this section of the borehole.

[0038] D. Start the water pump and inject water into the water injection probe 2 through the water injection hose 3. The injected water is discharged into the borehole section through the outlet hole. Record the injected water volume and measure the water leakage flow rate of the borehole section over a period of time. Compare the measured leakage flow rate with the set water leakage flow rate threshold. If it exceeds the threshold, that is, the water leakage flow rate is large (there are many water-conducting fractures in the borehole wall of this section), it indicates that the measurement point is within the water-conducting fracture zone. If it does not exceed the threshold, that is, the water leakage flow rate is small (there are few water-conducting fractures in the borehole wall of this section), it indicates that the measurement point is not within the water-conducting fracture zone. Within the water-conducting fracture zone, after recording the results, the remote control motor 1-6 is started to rotate in the opposite direction via the remote control terminal. At this time, the remote control motor 1-6 drives the lead screw 1-5 to rotate in the opposite direction, causing the two nuts 1-4 to move away from each other along the lead screw 1-5. This causes one end of the two robotic arms 1-3 to move away from each other, pulling the support plate 1-2 inward, causing the capsule shell 1-1 to contract. The remote control motor 1-6 continues to work for a certain period of time and then stops, realizing the capsule contraction and reset process. At this time, the remaining water in this section of the borehole flows out along the borehole, completing the measurement work of this measurement point.

[0039] E. Select another measurement point and repeat steps C and D to complete the measurement work at that point. Repeat this process multiple times to allow the double-ended water-blocking device to continue to penetrate deep into the borehole and measure each measurement point in turn until the measurement results of two consecutive measurement points are both outside the water-conducting fracture zone. Then stop the measurement work and remove the double-ended water-blocking device from the borehole.

[0040] F. Based on the results of each measurement point and its depth location, the height of the water-conducting fracture zone being measured can be determined.

[0041] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A double-ended water-blocking device for measuring the height of a water-conducting fracture zone, characterized in that, Includes a water injection hose, a water injection probe, and two sealing capsules; The sealing capsule includes a capsule shell, a central support tube, a remote-controlled motor, a lead screw, a support top plate, and a robotic arm. The capsule shell is cylindrical, with the central support tube passing through it and its two ends positioned on opposite sides of the capsule shell's exterior. The central support tube is located on the central axis of the capsule shell. The remote-controlled motor is fixed to the outer surface of the central support tube inside the capsule shell. The lead screw is mounted on the outer surface of the central support tube via a bearing mounting seat, and the lead screw and the central support tube are parallel to each other. One end of the lead screw is coaxially connected to the output shaft of the remote-controlled motor, allowing the motor to drive the lead screw to rotate relative to the bearing mounting seat. The lead screw has a left-hand thread and a right-hand thread, with a nut mounted on each thread. There are two robotic arms, both of which, along with the supporting top plate, are located inside the capsule shell. One end of each robotic arm is hinged to a nut, and the other end is hinged to a connecting seat on the supporting top plate. When the lead screw rotates in the forward direction, the two nuts move towards each other along the screw, causing the two robotic arms to push the supporting top plate outward to apply pressure to the capsule shell, thus inflating the capsule. When the lead screw rotates in the reverse direction, the two nuts move away from each other along the screw, causing the two robotic arms to pull the supporting top plate inward, thus shrinking and resetting the capsule. There are three remote-controlled motors, three lead screws, and three supporting top plates. The three remote-controlled motors and three lead screws are evenly distributed on the outer surface of the central support tube. The three supporting top plates are all arc-shaped, and when not inflated, they form a cylindrical shape inside the capsule shell. The water injection probe is located between the two sealing capsules, and both ends of the water injection probe are fixedly connected to the two sealing capsules respectively. The water injection probe is a cylindrical shape with a water injection port at one end. Multiple water outlet holes are opened on the outer circumference of the water injection probe. One end of the water injection hose passes through the central support tube of the sealing capsule near the water injection port and is connected to the water injection port.

2. The double-ended water-blocking device for measuring the height of water-conducting fracture zones according to claim 1, characterized in that, The three supporting top plates are all provided with multi-layer connecting plates at their adjacent joints, and the multi-layer connecting plates between two adjacent supporting top plates are staggered.

3. The double-ended water-blocking device for measuring the height of water-conducting fracture zones according to claim 1, characterized in that, The central support tube contains a mobile power supply, which powers the remote-controlled motor.

4. The double-ended water-blocking device for measuring the height of water-conducting fracture zones according to claim 1, characterized in that, The capsule shell is made of rubber.

5. A method for operating the double-ended water-blocking device for measuring the height of a water-conducting fracture zone according to claim 1, characterized in that, The specific steps are as follows: A. First, select a suitable observation site, and drill an upward-sloping borehole into the area of ​​the water-conducting fracture zone to be measured. After the borehole reaches a certain height above the expected top boundary of the water-conducting fracture zone, the drilling construction is completed. B. Assemble the double-ended water-blocking device, and connect one end of the water injection hose through the central support tube of the sealing capsule near the water injection port to the water injection port. Then, push the double-ended water-blocking device into the borehole through the push rod, and make the other end of the water injection hose outside the borehole and connect it to the water pump to complete the installation of the device. C. When starting the measurement, first set multiple measurement points at different depths according to the borehole depth, and set the water leakage flow threshold. Select the measurement point closest to the borehole opening, and push the double-ended water-blocking device to the measurement point through the push rod, so that the measurement point is between the two sealing capsules. At this time, stop pushing the double-ended water-blocking device. Start the remote control motor to rotate forward through the remote control end. At this time, the remote control motor drives the lead screw to rotate forward. Since part of the thread on the lead screw is left-handed and the other part is right-handed, the two nuts move closer to each other along the lead screw, thereby causing one end of the two robotic arms to move closer to each other and push the support plate to expand outward to apply pressure to the capsule shell. After the remote control motor continues to work for a certain period of time, it stops, realizing the capsule expansion process. At this time, the two sealing capsules seal the measurement point in this section of the borehole. D. Start the water pump and inject water into the water injection probe through the water injection hose. The injected water is discharged into the borehole section through the water outlet. Record the injected water volume and measure the water leakage flow rate of the borehole section over a period of time. Compare the measured leakage flow rate with the set water leakage flow rate threshold. If it exceeds the threshold, it means that the measurement point is within the water-conducting fracture zone. If it does not exceed the threshold, it means that the measurement point is not within the water-conducting fracture zone. After recording the results, start the remote control motor to rotate in the reverse direction through the remote control terminal. At this time, the remote control motor drives the lead screw to rotate in the reverse direction, causing the two nuts to move away from each other along the lead screw. This causes one end of the two robotic arms to move away from each other and pull the support plate inward, causing the capsule shell to shrink. The remote control motor continues to work for a certain period of time and then stops, realizing the capsule shrinkage and reset process. At this time, the remaining water in the borehole section flows out along the borehole, completing the measurement work of this measurement point. E. Select another measurement point and repeat steps C and D to complete the measurement work at that point. Repeat this process multiple times to allow the double-ended water-blocking device to continue to penetrate deep into the borehole and measure each measurement point in turn until the measurement results of two consecutive measurement points are both outside the water-conducting fracture zone. Then stop the measurement work and remove the double-ended water-blocking device from the borehole. F. Based on the results of each measurement point and its depth location, the height of the water-conducting fracture zone being measured can be determined.

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