A coal seam roof water-conducting fracture zone measuring device and use method

Abstract

The present application belongs to the technical field of water flowing fractured zone measurement, and discloses a coal seam roof water flowing fractured zone measuring device and a use method. The device comprises a main water delivery pipeline and a shower pipe. A fixed plugging device is installed at one end of the shower pipe close to the main water delivery pipeline. A movable plugging device is slidably connected to the other end of the shower pipe away from the main water delivery pipeline. The fixed plugging device and the movable plugging device are connected through a spiral connecting pipeline wound outside the shower pipe. The lengths of the fixed plugging device and the movable plugging device are consistent. The forward sliding of the movable plugging device can close the front end of region E. At this time, the detection intervals of region D and region E are more coherent, and only need to be slid to contact. At the same time, the movable plugging device and the fixed plugging device can guide the movement when moving, and the connection overlap or missing area of the detection area is greatly reduced. The accuracy of the final data is improved.

Description

Technical Field

[0001] This invention belongs to the field of water-conducting fracture zone measurement technology, specifically a device for measuring water-conducting fracture zones in the roof of a coal seam and its usage method. Background Technology

[0002] When determining the upper limit height of the fracture zone, due to the limited length of the inspection pipe, the entire fracture zone is measured in segments. Two plugs are used to create a single-segment sealing space for water flow measurement. Therefore, the entire measuring device needs to move within the borehole. During the inspection process, the smaller the interval between the multiple fracture zones, the more comprehensive the inspection. Thus, precise control of the displacement of the entire measuring device is required.

[0003] Plugging devices are often made of elastic materials, such as rubber, and achieve sealing by expanding through water or air injection. During expansion, the measuring tube is centered due to the influence of the plug. To prevent sliding wear on the rubber during sliding, the rubber is in a contracted state, causing the entire measuring device to increase in length with increasing depth. This increased length, coupled with the lack of support, makes the device prone to slight bending. This slight bending results in increased distance at the end and errors in the actual depth of advance within the borehole. The rubber is also more susceptible to sliding friction with the borehole body when tilted. Summary of the Invention

[0004] The purpose of this invention is to provide a measuring device and method for measuring water-conducting fracture zones in the roof of a coal seam, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A measuring device for water-conducting fracture zones in the roof of a coal seam includes a main water supply pipeline and a shower pipe. A fixed plug is installed at one end of the shower pipe near the main water supply pipeline, and a movable plug is slidably connected at the other end of the shower pipe away from the main water supply pipeline. The fixed plug and the movable plug are connected by a spiral connecting pipe wound around the outside of the shower pipe.

[0007] The movable plug and the fixed plug have the same length. The fixed plug includes a rigid annular fixed chamber fixedly connected to the shower pipe and a fixed plugging airbag fixedly connected to the outside of the rigid annular fixed chamber. The movable plug includes a rigid annular movable chamber slidably connected to the outside of the shower pipe and a movable plugging airbag fixedly connected to the outside of the rigid annular movable chamber. The inner wall of the rigid annular movable chamber is provided with an end plugging airbag. The rigid annular movable chamber and the shower pipe are sealed by the end plugging airbag.

[0008] The fixed plugging device is equipped with a regulating water pump, which is connected to the movable plugging airbag, the end plugging airbag, and the fixed plugging airbag via a regulating pipeline. A water pumping pipeline is connected to each of the movable, end, and fixed plugging airbags, and is equipped with a water pumping valve A, a water pumping valve B, and a water pumping valve C corresponding to each of the three airbags. Similarly, a water delivery pipeline is connected to each of the three airbags, and is equipped with a water delivery valve A, a water delivery valve B, and a water delivery valve C corresponding to each of the three airbags.

[0009] As a further embodiment of the present invention: the outer wall of the shower pipe is provided with a rack groove, and the inner wall of the rigid annular movable chamber is provided with a self-propelled mechanism that cooperates with the rack groove.

[0010] As a further embodiment of the present invention: a fixed storage slot and a movable storage slot are respectively provided on the opposite sides of the rigid annular fixed compartment and the rigid annular movable compartment, and the width of the fixed storage slot and the movable storage slot is greater than the diameter of the spiral connecting pipe.

[0011] As a further embodiment of the present invention: an end sealing ring groove is provided at the end of the shower pipe away from the main water supply pipeline, the self-propelled mechanism is located on the side of the end sealing ring groove close to the main water supply pipeline, and there is a gap between the rack groove and the end sealing ring groove.

[0012] As a further embodiment of the present invention: the rigid annular fixed chamber is connected to the external water replenishment chamber through a water replenishment pipeline.

[0013] As a further embodiment of the present invention: pressure sensors are provided inside the movable sealing airbag, the end sealing airbag, and the fixed sealing airbag.

[0014] As a further aspect of the present invention, a method for using a coal seam roof water-conducting fracture zone measuring device includes:

[0015] S1: Insert the shower hose into the first fracture zone detection area D, and inject water into the rigid annular fixed chamber through the water supply pipe. Since the rigid annular fixed chamber and the fixed sealing airbag are connected, the fixed sealing airbag expands under the pressure of the water. Open the water pump valve C, and close the water pump valves A, B, and C. Adjust the water pump to draw the liquid into the fixed sealing airbag, and then deliver it to the movable sealing airbag and the end sealing airbag through the water supply pipe until the pressure sensors in the fixed sealing airbag, movable airbag, and end sealing airbag reach the specified pressure. The fixed sealing airbag and movable airbag form a closed environment in area D. After water is injected through the main water supply pipe, the liquid enters the closed area D through the shower hose to measure the water-conducting fracture zone.

[0016] S2: After the measurement is completed, the main water supply pipeline pumps the liquid to the outside through the shower pipe. The pumping valves C and B are opened, and the pumping valve A is closed. The water supply valves C and B are closed, and the water supply valve A is opened. At this time, when the water pump is adjusted, the liquid in the end sealing airbag and the fixed sealing airbag is pumped out through the pumping pipeline and then transported to the inside of the movable sealing airbag through the water supply pipeline. The pressure inside the movable sealing airbag increases, and the sliding friction between the movable sealing airbag and the orifice increases. After the fixed sealing airbag and the end sealing airbag shrink, the fixed sealing airbag and the orifice can no longer contact each other. The rigid annular movable chamber and the shower pipe are separated from the limiting effect of the end sealing airbag. The main water supply pipeline is extended and pushed. The self-propelled mechanism cooperates with the rack and pinion groove to drive the shower pipe to push deeper until the fixed sealing device and the movable sealing device contact each other. The spiral connecting pipeline is stored in the movable storage groove and the fixed storage groove.

[0017] S3: Pump valve A is open, pump valves B and C are closed, water supply valves A and B are closed, and water supply valve C is open. The water pump is adjusted to draw the liquid in the movable sealing airbag into the fixed sealing airbag. The fixed sealing airbag expands to increase the friction with the orifice. The movable sealing airbag shrinks. The self-propelled mechanism, in cooperation with the rack and pinion groove, moves to the end of the shower pipe. Pump valve C is opened, pump valves A and B are closed, and water supply valve C is closed. Water supply valves A and B are closed. The water pump is adjusted to divert the liquid in the fixed sealing airbag to the movable sealing airbag and the end sealing airbag through the water supply pipeline. The end sealing airbag, in cooperation with the end sealing ring groove, achieves the sealing of the rigid annular movable chamber and the shower pipe. The movable sealing airbag expands to fit the orifice and form a closed second fracture zone detection area E. At this time, the boundary between the first fracture zone detection area D and the second fracture zone detection area E overlaps.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] After the blocking process begins, the movable blocking device seals the front end of region D, while the fixed blocking device seals the rear end. Once this section is tested, the fixed blocking device and the shower hose slide forward synchronously, bringing the fixed blocking device into contact with the movable blocking device. The front face of the fixed blocking device coincides with the rear boundary of region D. Using the forward sliding of the movable blocking device, the front end of region E is sealed. At this point, the testing intervals of regions D and E are more continuous, eliminating the need for length measurement; simply sliding until contact is achieved is sufficient. Simultaneously, both the movable and fixed blocking devices guide the movement, significantly reducing overlapping or missed areas in the testing regions. This multi-segment connection results in higher precision and improved final data accuracy.

[0020] The adjustable water pump, in conjunction with the adjustable pipeline, enables the linkage between the movable and fixed plugs to guide the shower hose. Simultaneously, pressure regulation allows for the expansion, contraction, and movement of the liquid within the fixed liquid, guiding the circulation. The expansion water supply does not generate additional energy consumption as the depth increases. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A three-dimensional schematic diagram of a measuring device for water-conducting fracture zones in the roof of a coal seam;

[0023] Figure 2 A front view schematic diagram of a measuring device for water-conducting fracture zones in the roof of a coal seam;

[0024] Figure 3 This is a schematic front view cross-section of a measuring device for water-conducting fracture zones in the roof of a coal seam.

[0025] Figure 4 A schematic diagram of the control pipeline distribution for a coal seam roof water-conducting fracture zone measuring device;

[0026] Figure 5 A schematic diagram illustrating the use of a measuring device for water-conducting fracture zones in the roof of a coal seam.

[0027] In the diagram: 1. Main water supply pipeline; 11. Water supply pipeline; 2. Shower hose; 21. Rack groove; 22. End sealing ring groove; 3. Movable sealing device; 31. Movable sealing airbag; 32. Rigid annular movable chamber; 33. Movable storage groove; 34. End sealing airbag; 35. Self-propelled mechanism; 4. Fixed sealing device; 41. Fixed sealing airbag; 42. Rigid annular fixed chamber; 43. Fixed storage groove; 5. Spiral connection pipeline; 6. Control pump; 7. Control pipeline; 71. Pumping pipeline; 711. Pumping valve A; 712. Pumping valve B; 713. Pumping valve C; 72. Water supply pipeline; 721. Water supply valve A; 722. Water supply valve B; 723. Water supply valve C; 8. Pressure sensor. Detailed Implementation

[0028] Example 1

[0029] Please see Figures 1-5 :

[0030] In this embodiment, a main water supply pipe 1 and a shower pipe 2 are included. A fixed plug 4 is installed at one end of the shower pipe 2 near the main water supply pipe 1, and a movable plug 3 is slidably connected at the other end of the shower pipe 2 away from the main water supply pipe 1. The fixed plug 4 and the movable plug 3 are connected by a spiral connecting pipe 5 wrapped around the outside of the shower pipe 2.

[0031] In this embodiment, the main water supply pipeline 1 is connected to an external water supply mechanism, which can supply water to the shower pipe 2, record and store water flow and pressure data in real time, and can connect to the network to transmit the recorded and stored monitoring data in real time, or export the monitoring data via USB. The liquid is transported through the shower pipe 2 into the space closed by the movable plug 3 and the fixed plug 4, and the water-conducting fracture zone is determined based on the fluid changes.

[0032] In this embodiment, the movable plug 3 is located at the front end of the shower pipe 2, and the fixed plug 4 is located at the end of the shower pipe 2. After the plugging begins, the movable plug 3 seals the front end of region D, and the fixed plug 4 seals the rear end of region D. After the detection of this section is completed, the fixed plug 4 and the shower pipe 2 slide forward synchronously, and the fixed plug 4 contacts the movable plug 3. The front end face of the fixed plug 4 coincides with the rear end boundary of region D. By using the forward sliding of the movable plug 3, the front end of region E is sealed. At this time, the detection intervals of region D and region E are more continuous, and there is no need to measure the length; it is only necessary to slide until contact. At this time, the overlapping or missed areas of the detection area are greatly reduced. The multi-segment connection accuracy is higher, which improves the accuracy of the final data.

[0033] In this embodiment, the movable plug 3 and the fixed plug 4 have the same length. The fixed plug 4 includes a rigid annular fixed chamber 42 fixedly connected to the shower pipe 2 and a fixed plug airbag 41 fixedly connected to the outside of the rigid annular fixed chamber 42. The movable plug 3 includes a rigid annular movable chamber 32 slidably connected to the outside of the shower pipe 2 and a movable plug airbag 31 fixedly connected to the outside of the rigid annular movable chamber 32. The inner wall of the rigid annular movable chamber 32 is provided with an end plug airbag 34. The rigid annular movable chamber 32 and the shower pipe 2 are sealed by the end plug airbag 34.

[0034] In this embodiment, both the movable plug 3 and the fixed plug 4 have a certain length. The purpose is to ensure that, when the movable plug 31 or the fixed plug 41 is inflated, the rigid annular movable chamber 32, in conjunction with the shower hose 2, guides the shower hose 2, ensuring that its axis is collinear with the hole axis during the shower hose's movement. This collinearity prevents the retracted movable plug 31 and fixed plug 41 from sliding against the hole.

[0035] In this embodiment, to simplify the control method, the rigid annular fixed chamber 42 and the rigid annular movable chamber 32 are connected by a spiral connecting pipe 5. Since the rigid annular fixed chamber 42 and the rigid annular movable chamber 32 will slide relative to each other, the spiral connecting pipe 5 is wound around the outside of the shower pipe 2. When the rigid annular movable chamber 32 and the rigid annular fixed chamber 42 shrink, the spiral connecting pipe 5 will coil around the outside of the shower pipe 2 and subsequently be stored in the groove, allowing the rigid annular movable chamber 32 and the rigid annular fixed chamber 42 to fit together, thereby forming alternating motion.

[0036] In this embodiment, since the rigid annular movable chamber 32 and the shower pipe 2 are slidably connected, and there is a sliding gap between the rigid annular movable chamber 32 and the shower pipe 2, an end-sealing airbag 34 is provided to improve the sealing performance and ensure the accuracy of the test data. The front end of the shower pipe 2 is provided with an end-sealing ring groove 22. After the end-sealing airbag 34 is inflated, it is embedded inside the end-sealing ring groove 22 to form a labyrinthine sealing boundary, ensuring the sealing effect under a certain pressure.

[0037] In this embodiment, a regulating water pump 6 is installed inside the fixed plugging device 4. The regulating water pump 6 is connected to the movable plugging airbag 31, the end plugging airbag 34, and the fixed plugging airbag 41 through the regulating pipeline 7. The water pumping pipeline 71 is connected to the movable plugging airbag 31, the end plugging airbag 34, and the fixed plugging airbag 41 respectively. The water pumping pipeline 71 is equipped with water pumping valves A711, B712, and C713 corresponding to the movable plugging airbag 31, the end plugging airbag 34, and the fixed plugging airbag 41 respectively. The water supply pipeline 72 is connected to the movable plugging airbag 31, the end plugging airbag 34, and the fixed plugging airbag 41 respectively. The water supply pipeline 72 is equipped with water supply valves A721, B722, and C723 corresponding to the movable plugging airbag 31, the end plugging airbag 34, and the fixed plugging airbag 41 respectively.

[0038] In this embodiment, the movement mode of the movable plug 3 and the fixed plug 4 is described above. As the depth of the orifice increases and the length of the pipe increases, the expansion control parameters of the movable plug airbag 31 and the fixed plug airbag 41 need to be adjusted. Under ideal conditions, when the boundaries of the orifice are stable, the influence of depth-induced sealing liquid adjustment can be reduced by the above method.

[0039] In this embodiment, a sealed liquid environment is formed between the movable plug 3 and the fixed plug 4. When the shower hose 2 moves within the orifice, the sealed liquid between the movable plug 3 and the fixed plug 4 enables self-circulation of the liquid, eliminating the need for external liquid replenishment. During relative movement between the shower hose 2, the fixed plug 4, and the movable plug 3, the liquid inside the end-sealing airbag 34 and the fixed plugging airbag 41 is pumped into the movable plugging airbag 31 via the regulating water pump 6. This increases the internal pressure of the movable plugging airbag 31, resulting in a tighter contact between the movable plugging airbag 31 and the orifice, thus improving the stability of the movable plugging airbag 31 in fixing the rigid annular movable chamber 32. As the shower hose 2 is pushed forward, the rigid annular movable chamber 32 guides the shower hose 2, ensuring that the shower hose 2 is axially collinear with the orifice. After the liquid inside the fixed plugging airbag 41 and the end-sealing airbag 34 is injected into the movable airbag 31, the fixed plugging airbag 41 and the end-sealing airbag 34 contract. The shower hose 2 and the rigid annular movable chamber 32 can slide relative to each other, and the fixed sealing airbag 41 will not contact the orifice. After the movable sealing device 3 and the fixed sealing device 4 come into contact, the secondary movement stage will begin.

[0040] In this embodiment, the control continues as described above. The water pump 6 injects liquid from the movable sealing airbag 31 into the fixed sealing airbag 41. The increased pressure in the fixed sealing airbag 41 causes it to expand and contact the orifice, increasing stability. The movable sealing airbag 31 travels automatically to the end of the shower hose 2. The water pump 6 diverts the liquid from the fixed sealing airbag 41 to the movable sealing airbag 31 and the end sealing airbag 34 until each reaches its designated pressure, at which point it is opened for testing. The advantage of this method is that, with relatively uniform orifice walls across multiple sections, the expansion water supply does not generate additional energy consumption as depth increases.

[0041] In this embodiment, the outer wall of the shower pipe 2 is provided with a rack groove 21, and the inner wall of the rigid annular movable chamber 32 is provided with a self-propelled mechanism 35 that cooperates with the rack groove 21.

[0042] In this embodiment, the self-propelled mechanism 35 can be engaged with the rack and pinion groove 21 by a servo motor and gears to achieve self-propelled movement. Self-propelled movement is mainly used for the active displacement of the movable plug 3.

[0043] In this embodiment, a fixed storage slot 43 and a movable storage slot 33 are respectively provided on opposite sides of the rigid annular fixed compartment 42 and the rigid annular movable compartment 32. The width of the fixed storage slot 43 and the movable storage slot 33 is greater than the diameter of the spiral connecting pipe 5.

[0044] In this embodiment, in order to ensure the accuracy of the regional connection, a movable storage slot 33 and a fixed storage slot 43 are provided. When the rigid annular fixed chamber 42 and the rigid annular movable chamber 32 are in contact with each other, the movable storage slot 33 and the fixed storage slot 43 form a space to accommodate the spiral connecting pipe 5. The structural clearance ensures that the rigid annular fixed chamber 42 and the rigid annular movable chamber 32 can contact each other.

[0045] In this embodiment, the end of the shower pipe 2 away from the main water supply pipe 1 is provided with an end sealing ring groove 22, and the self-propelled mechanism 35 is located on the side of the end sealing ring groove 22 close to the main water supply pipe 1. There is a gap between the rack groove 21 and the end sealing ring groove 22.

[0046] In this embodiment, there is a gap between the end sealing ring groove 22 and the rack groove 21. The rack groove 21 needs to match the self-propelled mechanism 35. Therefore, the end sealing ring groove 22 is a complete annular structure, so that when the end sealing airbag 34 is inflated, it can cooperate with the end sealing ring groove 22 to achieve a seal. The seal is not affected by the structure of the rack groove 21.

[0047] In this embodiment, pressure sensors 8 are provided in the movable sealing airbag 31, the end sealing airbag 34, and the fixed sealing airbag 41.

[0048] The pressure sensor 8 can be used to detect the pressure inside the movable sealing airbag 31, the end sealing airbag 34, and the fixed sealing airbag 41, thereby judging the sealing condition based on the pressure value.

[0049] In this embodiment, the rigid annular fixed chamber 42 is connected to the external water replenishment chamber through the water replenishment pipe 11. Due to geological reasons, during the cutting process, a pit with a significant impact is generated in a local area on the side wall of the hole. At this time, the expansion pressure of the movable sealing airbag 31, the end sealing airbag 34, and the fixed sealing airbag 41 is insufficient, so it is necessary to replenish the liquid through the water replenishment pipe 11.

[0050] Procedure for measuring water-conducting fracture zones:

[0051] S1: Send the shower hose 2 into the first fracture zone detection area D, and inject water into the rigid annular fixed chamber 42 through the water supply pipe 11. Since the rigid annular fixed chamber 42 and the fixed sealing airbag 41 are connected, the fixed sealing airbag 41 expands under the pressure of the water. Open the water pump valve C713, close the water pump valve A711, water pump valve B712, and water supply valve C723, and regulate the water pump 6 to draw the liquid in the fixed sealing airbag 41. Then, it is delivered to the movable sealing airbag 31 and the end sealing airbag 34 through the water supply pipe 72 until the pressure sensor 8 in the fixed sealing airbag 41, the movable airbag 31, and the end sealing airbag 34 reaches the specified pressure. The fixed sealing airbag 41 and the movable airbag 31 form a closed environment in area D. After water is injected through the main water supply pipe 1, the liquid enters the closed area D through the shower hose 2 to measure the water-conducting fracture zone.

[0052] S2: After the measurement is completed, the main water supply pipeline 1 pumps the liquid to the outside through the shower pipe 2. The pumping valves C713 and B712 are opened, and the pumping valve A711 is closed. The water supply valves C723 and B722 are closed, and the water supply valve A721 is opened. At this time, when the water pump 6 is working, the liquid in the end sealing airbag 34 and the fixed sealing airbag 41 is pumped out through the pumping pipeline 71 and then transported to the inside of the movable sealing airbag 31 through the water supply pipeline 72. The internal pressure of the movable sealing airbag 31 increases. As the sliding friction between the movable sealing airbag 31 and the orifice increases, the fixed sealing airbag 41 and the end sealing airbag 34 shrink, and the fixed sealing airbag 41 can no longer contact the orifice. The rigid annular movable chamber 32 and the shower pipe 2 are separated from the limiting effect of the end sealing airbag 34. The main water supply pipe 1 is extended and pushed. The self-propelled mechanism 35 cooperates with the rack and pinion groove 21 to drive the shower pipe 2 to push deeper until the fixed sealing device 4 and the movable sealing device 3 come into contact. The spiral connecting pipe 5 is stored in the movable storage groove 33 and the fixed storage groove 43.

[0053] S3: Pump valve A711 opens, pump valves B712 and C713 close, water supply valves A721 and B722 close, and water supply valve C723 opens. The regulating water pump 6 draws liquid from the movable sealing airbag 31 into the fixed sealing airbag 41. The fixed sealing airbag 41 expands, increasing friction with the orifice. The movable sealing airbag 31 contracts. The self-propelled mechanism 35, in conjunction with the rack and pinion groove 21, moves to the end of the shower hose 2. Pump valve C713 opens, and pump valves A711 and B712 close. The system is closed. Water supply valve C723 is closed, and water supply valves A721 and B722 are closed. The regulating water pump 6 diverts the liquid in the fixed sealing airbag 41 to the movable sealing airbag 31 and the end sealing airbag 34 through the water supply pipeline 72. The end sealing airbag 34 cooperates with the end sealing ring groove 22 to seal the rigid annular movable chamber 32 and the shower pipe 2. The movable sealing airbag 31 expands to fit the orifice and form a closed second fracture zone detection area E. At this time, the boundary between the first fracture zone detection area D and the second fracture zone detection area E overlaps.

[0054] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A measuring device for water-conducting fracture zones in the roof of a coal seam, comprising a main water supply pipeline (1) and a shower pipe (2), characterized in that: A fixed plug (4) is installed at one end of the shower pipe (2) near the main water supply line (1), and a movable plug (3) is slidably connected at the other end of the shower pipe (2) away from the main water supply line (1). The fixed plug (4) and the movable plug (3) are connected by a spiral connecting pipe (5) wrapped around the outside of the shower pipe (2). The movable plug (3) and the fixed plug (4) have the same length. The fixed plug (4) includes a rigid annular fixed chamber (42) fixedly connected to the shower pipe (2) and a fixed plug airbag (41) fixedly connected to the outside of the rigid annular fixed chamber (42). The movable plug (3) includes a rigid annular movable chamber (32) slidably connected to the outside of the shower pipe (2) and a movable plug airbag (31) fixedly connected to the outside of the rigid annular movable chamber (32). The inner wall of the rigid annular movable chamber (32) is provided with an end plug airbag (34). The rigid annular movable chamber (32) and the shower pipe (2) are sealed by the end plug airbag (34). The fixed plug (4) is equipped with a regulating water pump (6). The regulating water pump (6) is connected to the movable plug airbag (31), the end plug airbag (34), and the fixed plug airbag (41) through a regulating pipeline (7). The water pumping pipeline (71) is connected to the movable plug airbag (31), the end plug airbag (34), and the fixed plug airbag (41) respectively. The water pumping pipeline (71) is provided with a connection to the movable plug airbag (31), the end plug airbag (34), and the fixed plug airbag (41). The airbag (41) is equipped with a water pumping valve A (711), a water pumping valve B (712), and a water pumping valve C (713). The water supply pipeline (72) is connected to the movable sealing airbag (31), the end sealing airbag (34), and the fixed sealing airbag (41), respectively. The water supply pipeline (72) is equipped with a water supply valve A (721), a water supply valve B (722), and a water supply valve C (723) corresponding to the movable sealing airbag (31), the end sealing airbag (34), and the fixed sealing airbag (41).

2. The measuring device for water-conducting fracture zones in the roof of a coal seam according to claim 1, characterized in that: The outer wall of the shower pipe (2) is provided with a rack groove (21), and the inner wall of the rigid annular movable chamber (32) is provided with a self-propelled mechanism (35) that cooperates with the rack groove (21).

3. The measuring device for water-conducting fracture zones in the roof of a coal seam according to claim 2, characterized in that: The rigid annular fixed chamber (42) and the rigid annular movable chamber (32) are respectively provided with a fixed storage slot (43) and a movable storage slot (33) on opposite sides. The width of the fixed storage slot (43) and the movable storage slot (33) is greater than the diameter of the spiral connecting pipe (5).

4. A measuring device for water-conducting fracture zones in the roof of a coal seam according to claim 2, characterized in that: The shower pipe (2) has an end sealing ring groove (22) at the end away from the main water supply pipe (1). The self-propelled mechanism (35) is located on the side of the end sealing ring groove (22) close to the main water supply pipe (1). There is a gap between the rack groove (21) and the end sealing ring groove (22).

5. A measuring device for water-conducting fracture zones in the roof of a coal seam according to claim 1, characterized in that: The rigid annular fixed chamber (42) is connected to the external water replenishment chamber through a water replenishment pipe (11).

6. The measuring device for water-conducting fracture zones in the roof of a coal seam according to claim 1, characterized in that: Pressure sensors (8) are provided inside the active sealing airbag (31), the terminal sealing airbag (34), and the fixed sealing airbag (41).

7. The method of using the measuring device for water-conducting fracture zones in the roof of a coal seam according to any one of claims 1-6, characterized in that: include: S1: Send the shower hose (2) into the first crack zone detection area D, and inject water into the rigid annular fixed chamber (42) through the water supply pipe (11). Since the rigid annular fixed chamber (42) and the fixed sealing airbag (41) are connected, the fixed sealing airbag (41) expands under the action of water pressure. Open the water pumping valve C (713), close the water pumping valve A (711), water pumping valve B (712), and water supply valve C (723), and adjust the water pump (6) to draw the liquid in the fixed sealing airbag (41) into the water supply pipe (72) and then deliver it to the water supply pipe (72). The liquid is sent to the inside of the active sealing airbag (31) and the end sealing airbag (34) until the pressure sensor (8) inside the fixed sealing airbag (41), the active sealing airbag (31) and the end sealing airbag (34) reaches the specified pressure. The fixed sealing airbag (41) and the active sealing airbag (31) form a closed environment in area D. After water is injected through the main water supply pipeline (1), the liquid enters the closed area D through the shower pipe (2) to measure the water-conducting fracture zone. S2: After the measurement is completed, the main water supply pipeline (1) pumps the liquid to the outside through the shower pipe (2). The pumping valve C (713) and pumping valve B (712) are opened, and the pumping valve A (711) is closed. The water supply valve C (723) and water supply valve B (722) are closed, and the water supply valve A (721) is opened. At this time, when the regulating water pump (6) is working, the liquid in the end sealing airbag (34) and the fixed sealing airbag (41) is pumped out through the pumping pipeline (71) and then transported to the inside of the movable sealing airbag (31) through the water supply pipeline (72). The pressure inside the movable sealing airbag (31) increases, and the liquid in the movable sealing airbag (31) increases. As the sliding friction between the moving sealing airbag (31) and the orifice increases, the fixed sealing airbag (41) and the end sealing airbag (34) shrink, and the fixed sealing airbag (41) and the orifice cannot contact each other. The rigid annular movable chamber (32) and the shower pipe (2) are separated from the limiting effect of the end sealing airbag (34), and the main water supply pipe (1) is lengthened and pushed. The self-propelled mechanism (35) cooperates with the rack groove (21) to drive the shower pipe (2) to push deeper until the fixed sealing device (4) and the moving sealing device (3) contact each other. The spiral connecting pipe (5) is stored in the movable storage groove (33) and the fixed storage groove (43). S3: Pump valve A (711) is open, pump valves B (712) and C (713) are closed, water supply valves A (721) and B (722) are closed, water supply valve C (723) is open, the regulating pump (6) draws the liquid in the movable sealing airbag (31) into the fixed sealing airbag (41), the fixed sealing airbag (41) expands to increase the contact friction with the orifice, the movable sealing airbag (31) shrinks, the self-propelled mechanism (35) and the rack groove (21) cooperate to walk to the end of the shower pipe (2), pump valve C (713) is open, pump valves A (711) and B (713) are closed, pump valves B (712) and C (713) are closed, pump valves A (711) and B (713) are closed, and the water supply valves C (712) and C (713) are closed. 712) Close, water supply valve C (723) close, water supply valve A (721) and water supply valve B (722) open, regulate water pump (6) to divert liquid in fixed sealing airbag (41) to movable sealing airbag (31) and end sealing airbag (34) through water supply pipeline (72). End sealing airbag (34) and end sealing ring groove (22) cooperate to seal rigid annular movable chamber (32) and shower pipe (2). Movable sealing airbag (31) expands to fit the hole body to form a closed second fracture zone detection area E. At this time, the boundary of the first fracture zone detection area D and the second fracture zone detection area E overlaps.

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