Surrounding rock permeation pressure monitoring device and method

Abstract

The embodiment of the application relates to the field of measuring drilling pressure, and particularly relates to a surrounding rock permeation pressure monitoring device and method. The device and method can position the monitoring assembly at a target depth in the drilling hole by setting a plugging assembly, so that the device is stable in position when monitoring; the monitoring assembly and underground water in the drilling hole are isolated from the external environment by the plugging assembly, so that the water pressure in the drilling hole and the surrounding rock pore water pressure can be kept in dynamic balance, and the permeation pressure monitored by the monitoring assembly is close to the actual pressure value; and compared with the existing permanent installation mode, the monitoring assembly and the plugging assembly are set to be detachable, and the plugging assembly can be controlled to plug the drilling hole through an operating member, which indicates that the overall layout of the monitoring device is in a form of being able to be taken back, the maintenance and replacement of the components of the monitoring device are facilitated, the layout and taking back of the monitoring device will not damage the drilling hole structure, the drilling hole reusability and the monitoring data continuity are improved, and the construction and use cost of the surrounding rock permeation pressure monitoring is reduced.

Description

Technical Field

[0001] The embodiments of this application relate to the field of borehole pressure measurement, and particularly to a device and method for monitoring surrounding rock permeability pressure. Background Technology

[0002] The statements herein are provided merely as background information in connection with this application and do not necessarily constitute prior art.

[0003] Groundwater in deep rock fissures acts on the voids in the surrounding rock medium, creating seepage pressure. Since deep engineering projects typically traverse water-rich strata with well-developed fissures, and the greater the burial depth, the higher the water pressure, the high water pressure environment, together with the interconnected fissure network, affects the magnitude and distribution of seepage pressure.

[0004] Seepage pressure is constantly redistributed as excavation unloading and disturbance occur, affecting the stability of the surrounding rock. Therefore, monitoring the seepage pressure of the surrounding rock helps to analyze the stability of the surrounding rock, thereby assessing the safety risks of engineering construction and operation. It can also help verify the effectiveness of fissure grouting and water plugging, ensuring the safety of deep engineering projects. Summary of the Invention

[0005] A brief overview of this application is provided below to offer a basic understanding of certain aspects thereof. It should be understood that this overview is not an exhaustive summary of the application. It is not intended to identify key or essential parts of the application, nor is it intended to limit its scope. Its purpose is merely to present certain concepts in a simplified form as a prelude to the more detailed description that follows.

[0006] This application provides a surrounding rock seepage pressure monitoring device, comprising: a monitoring component, a sealing component, and an operating component. The monitoring component is detachably mounted on the sealing component and configured to contact groundwater within a borehole in the surrounding rock to monitor seepage pressure within the borehole. The sealing component is configured to fix the monitoring component at a predetermined depth within the borehole and to allow the seepage pressure data obtained by the monitoring component to be transmitted to the outside of the borehole. The operating component is mounted on the sealing component and configured to be able to be subjected to external force to seal the borehole, thereby isolating the monitoring component and the groundwater within the borehole from the outside.

[0007] The surrounding rock seepage pressure monitoring device provided in this application, by setting a sealing component, can position the monitoring component at the target depth within the borehole through the sealing borehole, ensuring the device's stable position during monitoring. The sealing component isolates the monitoring component and groundwater within the borehole from the external environment, maintaining a dynamic balance between the water pressure within the borehole and the pore water pressure of the surrounding rock mass. This ensures that the seepage pressure monitored by the component is close to the actual pressure value, achieving long-term stable and accurate monitoring. Furthermore, compared to existing permanently buried installation methods, the monitoring component and sealing component are detachable, and the sealing component can be controlled to seal the borehole via an operating device. This indicates that the overall deployment of the monitoring device is retrievable, facilitating the maintenance and replacement of device components. The deployment and retrieval of the monitoring device do not damage the borehole structure, improving borehole reusability and monitoring data continuity, and reducing the construction and usage costs of surrounding rock seepage pressure monitoring.

[0008] This application also provides a method for monitoring the seepage pressure of surrounding rock. By using the aforementioned device, the water pressure inside the borehole can be kept in dynamic balance with the pore water pressure of the surrounding rock mass, ensuring that the monitored seepage pressure is close to the actual pressure value and achieving long-term stable and accurate monitoring. Compared with the existing permanent installation method, it is easier to maintain and replace the monitoring device components. Furthermore, the deployment and retrieval of the monitoring device will not damage the borehole structure, improving the reusability of the borehole and the continuity of monitoring data, and reducing the construction and use costs of monitoring the seepage pressure of surrounding rock. Attached Figure Description

[0009] To further illustrate the above and other advantages and features of this application, the specific embodiments of this application will be described in more detail below with reference to the accompanying drawings. The drawings, together with the following detailed description, are included in and form a part of this specification. Elements having the same function and structure are indicated by the same reference numerals. It should be understood that these drawings only depict typical examples of this application and should not be considered as limiting the scope of this application.

[0010] Figure 1 This is a schematic diagram of the surrounding rock seepage pressure monitoring device provided in an embodiment of this application; Figure 2 This is a partial structural schematic diagram of the sealing component of the device provided in the embodiments of this application; Figure 3 This is a schematic diagram of the structure of the monitoring component of the device provided in the embodiments of this application; Figure 4 This is a partial structural schematic diagram of the surrounding rock seepage pressure monitoring device provided in an embodiment of this application; Figure 5 This is a partial structural diagram of the operating components of the monitoring device provided in the embodiments of this application.

[0011] Explanation of reference numerals in the attached figures: 10. Monitoring component; 11. Monitoring element; 110. Data transmission line; 12. Receiving element; 121. Receiving section; 1210. Water permeable hole; 122. First sealing part; 1220. Pipe hole; 1221. Wire hole; 123. Second sealing part; 13. Flushing element; 14. Drainage element; 15. Filler; 16. Monitoring fixing element; 20. Sealing component; 21. Connector; 22. Guide component; 23. Sealing component; 24. Limiting component; 30. Operating component; 31. Operating part; 32. Connecting part; 33. Pushing part; 100. Surrounding rock seepage pressure monitoring device. Detailed Implementation

[0012] Exemplary embodiments of this application will be described below with reference to the accompanying drawings. For clarity and brevity, not all features of actual implementations are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the development of any such actual embodiment to achieve the developer's specific goals, such as complying with constraints related to the system and business, and these constraints may vary depending on the implementation. Furthermore, it should be understood that while development work can be very complex and time-consuming, such development work is merely a routine task for those skilled in the art who benefit from the content of this application.

[0013] It should also be noted that, in order to avoid obscuring this application with unnecessary details, only the equipment structure and / or processing steps closely related to the solution according to this application are shown in the accompanying drawings, while other details that are not closely related to this application are omitted.

[0014] The following disclosure provides several different implementations or examples for carrying out this application. To simplify the disclosure of this application, specific examples of components and methods are described below. Of course, these are merely examples and are not intended to limit this application. In the description of the embodiments of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0015] Currently, the common method for monitoring seepage pressure in underground engineering is as follows: A piezometer with a data cable at its tail end is deployed to the target monitoring point in a borehole at a depth equal to the target monitoring depth of the surrounding rock. After backfilling the monitoring section with filter material, cement mortar is injected into the borehole opening to seal it. During this process, the data cable from the piezometer extends out of the borehole through the cement mortar. Because the borehole is sealed with cement mortar, this method results in permanent installation. The piezometer cannot be retrieved and reused after the monitoring cycle ends, and the monitoring hole cannot be repurposed, leading to increased monitoring costs and affecting the continuity of monitoring data.

[0016] To address the aforementioned problems, embodiments of this application provide, in one aspect, a device for monitoring the permeability pressure of surrounding rock. Figure 1 This is a schematic diagram of the surrounding rock seepage pressure monitoring device provided in an embodiment of this application, as shown below. Figure 1 As shown, the surrounding rock seepage pressure monitoring device 100 includes: a monitoring component 10, a sealing component 20, and an operating component 30. The monitoring component 10 is detachably mounted on the sealing component 20 and is configured to contact the groundwater in the borehole of the surrounding rock to monitor the seepage pressure in the borehole. The sealing component 20 is configured to fix the monitoring component 10 at a predetermined depth in the borehole and to allow the seepage pressure data monitored by the monitoring component 10 to be transmitted to the outside of the borehole. The operating component 30 is mounted on the sealing component 20 and is configured to be able to seal the borehole by external force, so as to isolate the monitoring component 10 and the groundwater in the borehole from the outside.

[0017] The surrounding rock seepage pressure monitoring device 100 provided in the embodiments of this application, by setting a sealing component 20, can position the monitoring component 10 at the target depth in the borehole through sealing the borehole, so that the device is stable in position during monitoring; by isolating the monitoring component 10 and groundwater in the borehole from the external environment by the sealing component 20, the water pressure in the borehole can be kept in dynamic balance with the pore water pressure of the surrounding rock mass, ensuring that the seepage pressure monitored by the monitoring component 10 is close to the actual pressure value, and achieving long-term stable and accurate monitoring; and compared with the existing permanent buried installation method, the monitoring component 10 and the sealing component 20 are set to be detachable, and the sealing component 20 can be controlled to seal the borehole by the operating component 30, indicating that the overall layout of the monitoring device is in a retrievable form, which facilitates the maintenance and replacement of the monitoring device components, and the layout and retrieval of the monitoring device will not damage the borehole structure, improve the reusability of the borehole and the continuity of monitoring data, and reduce the construction and use costs of surrounding rock seepage pressure monitoring.

[0018] Figure 2 This is a partial structural schematic diagram of the sealing component of the device provided in the embodiments of this application. In some embodiments, such as... Figure 1 and Figure 2 As shown, the sealing assembly 20 includes a connector 21, a guide 22, and a sealing member 23. The connector 21 is fixedly disposed on the guide 22 and is configured to be detachably connected to the monitoring assembly 10. The sealing member 23 is disposed on the guide 22 and is configured to be able to fit against the guide 22 and the borehole under the action of the operating member 30 to seal the borehole. The guide 22 is configured to extend outside the borehole to adjust the depth of the connector 21 fixed thereto in the borehole, thereby fixing the monitoring assembly 10 to a predetermined depth in the borehole.

[0019] When the sealing component 23 is subjected to force and fits against the guide component 22 and the borehole, the space between the borehole and the guide component 22 is filled, blocking the communication channel between the groundwater inside the borehole and the outside of the borehole; and since the monitoring component 10 is connected to the connector 21, the sealing component 23 can provide friction when it fills the space between the borehole and the guide component 22 to counteract the axial pressure of the borehole generated by the groundwater, thereby making the monitoring component 10 firmly fixed at a predetermined depth inside the borehole.

[0020] In some embodiments, such as Figure 2 As shown, the connector 21 is fixedly disposed at one end of the guide 22 so as to facilitate the disassembly and connection of the monitoring component 10 with the connector 21, and to facilitate the monitoring component 10 to be transported to a predetermined depth in the borehole.

[0021] In some embodiments, such as Figure 1 As shown, the sealing assembly 20 also includes multiple limiting members 24, and multiple sealing members 23 are provided. The limiting members 24 are provided on the guide member 22 and are positioned between adjacent sealing members 23. Compared with the whole structure, setting multiple sealing members 23 can reduce the overall stiffness, so as to conform to the undulations of the borehole wall at different depths, enhance the adaptability to irregular borehole walls, and ensure the effectiveness and stability of sealing. By setting the limiting members 24 between adjacent sealing members 23, the deformation stroke of each sealing member 23 can be limited, so that the deformation degree of multiple sealing members 23 is uniform, avoiding local stress concentration that leads to sealing instability.

[0022] Figure 3 This is a schematic diagram of the structure of the monitoring component of the device provided in the embodiments of this application. In some embodiments, such as... Figure 1 and Figure 3 As shown, the monitoring component 10 includes a monitoring element 11, a receiving element 12, a flushing element 13, and a draining element 14. The receiving element 12 is configured to accommodate the monitoring element 11 and to allow groundwater in the borehole to flow through the monitoring element 11 to monitor the seepage pressure in the borehole. The receiving element 12 is filled with a filler 15 to fix the monitoring element 11 and filter impurities in the groundwater. The flushing element 13 is configured to flush the impurities in the filler 15. The draining element 14 is configured to drain the liquid flushed from the filler 15 out of the receiving element 12. The receiving element 12 is configured to be detachably connected to the connector 21 of the sealing component 20.

[0023] By setting the filler 15 inside the container 12, the positions of the monitoring element 11 and the flushing element 13 inside the container 12 can be fixed, enabling long-term in-situ monitoring. Furthermore, the filler 15 forms a continuous water medium within the container 12, eliminating any potential air gaps or discontinuous water sections, ensuring that changes in water pressure in the surrounding rock fissures of the borehole can be rapidly transmitted to the sensor of the monitoring element 11, achieving a lag-free, immediate response. Simultaneously, the filler 15 can filter fine particulate impurities in the groundwater, reducing the rate at which the monitoring element 11 becomes clogged and extending its effective working period. The flushing element 13 flushes away the fine particulate impurities deposited in the filler 15 and the monitoring element 11, restoring permeability and preventing signal distortion or delay caused by blockage of the filler 15. The detachable nature of the container 12 and the connecting element 21 facilitates the replacement of the filler 15 and the monitoring element 11, which experience rapid performance degradation.

[0024] In some embodiments, such as Figure 2 and Figure 3 As shown, the receiving member 12 includes a receiving portion 121, a first sealing portion 122, and a second sealing portion 123. The first sealing portion 122 is fixedly disposed in the receiving portion 121, and the second sealing portion 123 is detachably disposed in the receiving portion 121 to retain the monitoring member 11, the filler 15, and the flushing member 13 within the receiving portion 121. The first sealing portion 122 is configured to be detachably connected to the connecting member 21. The detachable arrangement of the second sealing portion 123 and the receiving portion 121 facilitates the arrangement of the flushing member 13, the monitoring member 11, and the filling of the filler 15 within the receiving portion 121, and also facilitates disassembly and replacement.

[0025] In some embodiments, such as Figure 2 and Figure 3 As shown, the connector 21 can be configured as a cylindrical structure with internal threads, and the first sealing part 122 can be configured as a cylindrical structure with external threads to achieve disassembly and connection, so as to facilitate the monitoring component 10 and the sealing component 20 to be updated and maintained respectively.

[0026] In some embodiments, such as Figure 1 As shown, a plurality of permeable holes 1210 are uniformly formed on the receiving part 121 so that groundwater can flow through it.

[0027] In some embodiments, such as Figure 1 and Figure 3 As shown, the data transmission line 110, flushing member 13, and draining member 14 of the monitoring member 11 are configured to extend through the first sealing part 122 and out of the receiving part 121, so that the data monitored by the monitoring member 11 is transmitted to the outside of the borehole via the data transmission line 110, and the draining member 14 can receive water flow from the outside of the borehole to flush the filling material 15 and the monitoring member 11 in the receiving part 121, and discharge the flushed water flow from the draining member 14.

[0028] In some embodiments, when the flushing member 13 is flushing, the drain member 14 may be configured to open or close according to the pressure change of the monitoring member 11.

[0029] In some embodiments, when the seepage pressure detected by the monitoring element 11 does not increase significantly, it indicates that the tiny particulate impurities deposited in the filling material 15 are flushed by the water flow of the flushing element 13, discharged along the permeable holes 1210 formed on the receiving part 121, and then flow away along the fissures in the borehole. At this time, the drainage element 14 remains closed. When the seepage pressure detected by the monitoring element 11 increases significantly, the drainage element 14 is set to open so that the tiny particulate impurities deposited and blocked in the filling material 15 can be discharged out of the borehole through the drainage element 14, so as to avoid the extreme high pressure generated by the flushing element 13 during flushing and damage to the pressure sensing element of the monitoring element 11. Compared with removing and replacing the monitoring element 11 and the filling material 15 and re-laying them, the in-situ backwashing using the flushing element 13 and the drainage element 14 can maintain the originality and stability of the groundwater pressure environment in the borehole for a long time, and can effectively ensure the continuity and authenticity of the monitoring data.

[0030] In some embodiments, such as Figure 3 As shown, the first sealing part 122 may have two through holes 1220 for the flushing component 13 and the draining component 14 to pass through. The flushing component 13 and the draining component 14 may be configured to pass through the through holes 1220 and be integrally sealed and welded to the outer end face of the first sealing part 122.

[0031] In some embodiments, such as Figure 3 As shown, the first sealing part 122 may have a wire hole 1221, and the monitoring fixing member 16 fixes the data transmission line 110 that passes through the wire hole 1221 and seals the wire hole 1221.

[0032] Figure 4 This is a partial structural schematic diagram of the surrounding rock permeability pressure monitoring device provided in an embodiment of this application. In some embodiments, such as... Figure 4 As shown, the guide member 22 and connector 21 of the sealing assembly 20 are hollow, so that the data transmission line 110 extends out of the borehole along the guide member 22, thereby transmitting the permeation pressure data monitored by the monitoring member 11 to the outside of the borehole. This allows the data transmission line 110 to be held within the hollow structure formed by the guide member 22 and connector 21, reducing the damage to the data transmission line 110 caused by external environmental influences, ensuring the continuity of monitoring data, and extending its service life.

[0033] In some embodiments, the flushing member 13 may extend through the through hole 1220 of the first sealing part 122 and extend through a borehole in the hollow structure formed by the connector 21 and the guide 22, so that the flushing member 13 can be connected to a water source outside the borehole to provide sufficient and stable water flow for flushing the filler 15 and the monitoring member 11.

[0034] Figure 5 This is a partial structural schematic diagram of the operating components of the monitoring device provided in an embodiment of this application. In some embodiments, such as... Figure 4 and Figure 5 As shown, the operating component 30 includes an operating part 31, a connecting part 32, and a pushing part 33. The connecting part 32 is configured to connect to both the operating part 31 and the pushing part 33. The pushing part 33 abuts against the sealing member 23 of the sealing assembly 20. The operating part 31 is configured to allow the connecting part 32 to slide relative to the guide member 22 of the sealing assembly 20, so that the pushing part 33 compresses the sealing member 23, thereby isolating the monitoring component 10 and the groundwater in the borehole from the outside. By setting the connecting part 32, the operating part 31 can be located near the borehole opening, facilitating operation by the operator; and by setting the pushing part 33 to abut against the sealing member 23, the axial movement of the connecting part 32 can be converted into axial compression and radial expansion of the sealing member 23 to seal the borehole.

[0035] In some embodiments, the operating part 31 can be configured as a handwheel and threadedly connected to the end of the guide member 22 away from the connecting member 21. The operating part 31 and the connecting part 32 are connected by a thrust bearing, which is sleeved on the guide member 22. With the above configuration, the rotatable operating part 31 can drive the thrust bearing to move axially, thereby driving the connecting part 32 to move axially. This allows for accurate control of the compression stroke when the sealing member 23 is pushed to seal the borehole, saving operating steps.

[0036] In some embodiments, the handwheel may have a trapezoidal internal thread structure, and the end of the guide member 22 away from the connector 21 may have a trapezoidal external thread. The two are connected to each other and can self-lock after the handwheel compresses the sealing member 23, thereby improving the ease of operation.

[0037] In some embodiments, the pusher 33 may be integrally welded to the end of the connector 32 away from the borehole to form a stable pusher structure, thereby ensuring that the sealing member 23 is subjected to uniform force when compressed.

[0038] In some embodiments, the connecting portion 32 is configured to expose a predetermined length of the borehole, which is greater than the deformation length of the sealing member 23 in the axial direction of the borehole, so that the position of the operating portion 31 after the compression operation is performed is still in a position that is easy to operate.

[0039] Preferably, the predetermined length is not less than 20cm.

[0040] Another embodiment of this application provides a method for monitoring the seepage pressure of surrounding rock. It uses the aforementioned device to maintain a dynamic balance between the water pressure inside the borehole and the pore water pressure of the surrounding rock mass, ensuring that the monitored seepage pressure is close to the actual pressure value and achieving long-term stable and accurate monitoring. Compared with the existing permanent installation method, it facilitates the maintenance and replacement of the monitoring device components, and the deployment and retrieval of the monitoring device will not damage the borehole structure, improving the reusability of the borehole and the continuity of monitoring data, and reducing the construction and use costs of monitoring the seepage pressure of surrounding rock.

[0041] In some embodiments, the method for monitoring surrounding rock seepage pressure includes the following steps: S10: arranging a borehole and installing the device inside the borehole; S20: using the operating component 30 to compress the sealing component 23 of the sealing assembly 20 to isolate the monitoring assembly 10 and the groundwater inside the borehole from the outside; S30: using the monitoring assembly 10 to monitor the seepage pressure inside the borehole. By first installing the monitoring device in the borehole and then using the operating component 30 to control the sealing assembly 20 to seal the borehole, the overall layout of the monitoring device is designed to be retrievable. Compared to the existing permanent installation method, this facilitates the maintenance and replacement of the monitoring device components. Furthermore, the installation and retrieval of the monitoring device do not damage the borehole structure, improving the reusability of the borehole and the continuity of monitoring data, and reducing the construction and usage costs of surrounding rock seepage pressure monitoring.

[0042] In some embodiments, step S20 specifically includes the following steps: S21: When deploying the device, determine that the monitoring component 10 has reached a predetermined depth position in the borehole; S22: Push the jacking part 33 of the operating member 30 toward the monitoring component 10 to axially compress the sealing member 23, so as to isolate the monitoring component 10 and the groundwater in the borehole from the outside. By first determining the target depth position of the monitoring component 10 in the borehole and then sealing the borehole, the position of the monitoring component 10 can be stabilized during monitoring; by compressing the sealing member 23 by the jacking part 33 to isolate the monitoring component 10 and the groundwater in the borehole from the external environment, the water pressure in the borehole and the pore water pressure of the surrounding rock mass can be kept in dynamic balance, ensuring that the seepage pressure monitored by the monitoring component 10 is close to the actual pressure value, and achieving long-term stable and accurate monitoring.

[0043] In some embodiments, step S30 specifically includes the following steps: S31: Connecting the data transmission line 110 of the monitoring component 10 to a data acquisition device outside the borehole; S32: Connecting the flushing component 13 of the monitoring component 10 to a water supply device outside the borehole. By connecting the data transmission line 110 and the flushing component 13 to the outside of the borehole, and periodically flushing the monitoring component 11 and the filling material 15 of the monitoring component 10 through the external water source connected to the flushing component 13, fine particulate impurities deposited in groundwater can be removed, improving long-term operating performance and achieving long-term stable in-situ monitoring.

[0044] In some embodiments, such as Figure 1 and Figure 2 As shown, the guide member 22 can be a tubular structure, and the sealing member 23 can be sleeved on the guide member 22 to surround the guide member 22 in a circumferential manner, so as to fill the annular space between the guide member 22 and the borehole.

[0045] In some embodiments, the sealing member 23 is configured as a cylindrical structure and is elastic to fit the annular space between the borehole and the guide member 22, and can deform when subjected to the action of the operating member 30, so that the contact surface of the sealing member 23 is pressed into the tiny unevenness of the borehole wall and the side wall of the guide member 22, thereby improving the sealing performance.

[0046] In some embodiments, the material of the sealing component 23 is typically EPDM rubber with a hardness of 60-70A, and hydrogenated nitrile rubber with a hardness of 75-80A is selected under harsh groundwater conditions.

[0047] In some embodiments, the limiting member 24 can be a circular perforated limiting gasket, which is adapted to be fitted onto the guide member 22 so as to fully contact the sealing member 23 in the axial direction of the borehole, forming a rigid barrier between adjacent sealing members 23, preventing the sealing member 23 from being excessively deformed and extruded, and avoiding instability of the sealing structure.

[0048] In some embodiments, the inner diameter of the sealing member 23 is set to be 1-2 mm larger than the outer diameter of the guide member 22, and the outer diameter of the sealing member 23 is set to be 2-3 mm smaller than the inner diameter of the borehole. The inner diameter setting allows the sealing member 23 to be smoothly fitted onto the guide member 22, and the reserved size difference in the outer diameter allows the sealing member 23 to have sufficient radial deformation space to seal the guide member 22 and the borehole wall, ensuring that the compressive force required for the deformation of the sealing member 23 is within a controllable range and avoiding stress concentration.

[0049] In some embodiments, the inner diameter of the limiting member 24 is set to be 1-2 mm larger than the outer diameter of the guide member 22, and the outer diameter of the limiting member 24 is set to be 2-3 mm smaller than the inner diameter of the drilled hole, with a thickness of 3-5 mm. The inner diameter setting allows the limiting member 24 to slide smoothly along the axial direction of the guide member 22 with the axial deformation of the sealing member 23 when the sealing member 23 is compressed, avoiding jamming of the operating member 30 during compression. At the same time, the small dimensional difference can prevent the sealing member 23 from being squeezed out from the gap between the limiting member 24 and the guide member 22 under high pressure. Meanwhile, the reserved dimensional difference in the outer diameter can reserve space for the radial expansion of the sealing member 23, and also avoid friction between the limiting member 24 and the drilled hole. The thickness setting of the limiting member 24 can avoid occupying too much axial drilling space, ensuring that multiple sealing members 23 are effectively arranged within a limited axial space.

[0050] In some embodiments, the sealing member 23 and the limiting member 24 can be configured to have equal dimensions in the radial direction, and both have the same gap with the sealing member 23 and the same gap with the limiting member 24. Equal dimensions in the radial direction ensure that the contact surface between the sealing member 23 and the limiting member 24 is flat and aligned after the sealing member 23 expands under pressure, avoiding stress concentration caused by steps due to dimensional differences. Simultaneously, the identical fit clearance makes the support and constraint of the limiting member 24 on the sealing member 23 more symmetrical, improving the coordination between axial compression and radial expansion of the sealing member 23.

[0051] In some embodiments, the guide member 22 can be configured as a hollow tubular structure with an inner diameter of 30~40mm. The small diameter facilitates the fitting of the sealing member 23 and the limiting member 24 onto the guide member 22.

[0052] In some embodiments, the filler 15 may be medium-coarse sand filler such as quartz sand.

[0053] Preferably, such as Figure 3 As shown, the flushing component 13 can be configured as a spiral spring tube with water outlet holes evenly opened on the tube wall to uniformly spray flushing water into the receiving component 12, fully flushing away deposited impurities and improving the restoration effect of water permeability.

[0054] Preferably, the flushing component 13 and the drain component 14 can be high-pressure stainless steel pipes to extend their service life.

[0055] In some embodiments, the diameter of the flushing component 13 and the drain component 14 is 5-6 mm.

[0056] In some embodiments, the receiving portion 121 may be configured as a hollow cylinder with a height of 500 mm and an outer diameter 2-3 mm smaller than the drill hole, so as to make the process of installing it into the drill hole smoother. Both the upper and lower ends of the receiving portion 121 are formed with external threads to engage with the connecting member 21 and the second sealing portion 123 respectively.

[0057] In some embodiments, the second sealing part 123 can be a hollow cylinder with a height of 50 mm, an open top and a closed bottom, and an internal thread structure that is threaded to match one end of the receiving part 121.

[0058] In some embodiments, the drain member 14 extends toward the thread root of the first seal 122 in the direction of the second seal 123, and the flushing member extends toward the closed end of the second seal 123 in the direction of the second seal 123.

[0059] In some embodiments, the monitoring element 11 is a piezometer.

[0060] In some embodiments, the flushing component 13 can be connected to a high-pressure extension pipeline via a ferrule connector to extend the borehole from the target monitoring location; the drainage component 14 can be connected to a high-pressure extension pipeline via a ferrule connector, and the high-pressure extension pipeline is reserved as needed.

[0061] In some embodiments, the connecting portion 32 may be configured as a hollow tubular structure, and its inner diameter may be set to be larger than a predetermined size of the guide member 22 (e.g., 2~3 mm) so that it can move smoothly axially relative to the guide member 22.

[0062] In some embodiments, the position of the monitoring component 10 can be adjusted according to the length of the guide 22 and the connecting portion 32 to meet the needs of monitoring different depths of the borehole.

[0063] In some embodiments, the connector 21 may be integrally welded to the guide 22, and its height may be set to be equal to the height of the first sealing part 122, so as to achieve a stable threaded fit.

[0064] In some embodiments, the sealing member 23 is sleeved on the end of the guide member 22 connected to the connector 21. The diameter of the connector 21 can be set to be 2-3 mm smaller than the inner diameter of the borehole, so as to form a radial dimension difference with the guide member 22 with a smaller diameter, so that the sealing member 23 is fully axially pressed against the connector 21 after being compressed, making the sealing effect more stable.

[0065] In some embodiments, in step S10, the assembly of the device can be completed on the ground before the surrounding rock permeability pressure monitoring device 100 is deployed.

[0066] In some embodiments, in step S10, the surrounding rock permeability pressure monitoring device 100 can be assembled on the ground as follows: the receiving part 121 and the second sealing part 123 are separated, with one end of the opening facing upwards. The monitoring element 11 is placed into the geotextile bag and fixed. The data transmission line 110 is then passed through the wire hole 1221 and the monitoring fixing member 16 in sequence. After keeping the monitoring element 11 in the center position in the middle section of the receiving part 121, the data transmission line 110 is connected and fixed to the first sealing part 122 using the monitoring fixing member 16. The remaining space of the receiving part 121 is filled with filler 15. Then, the second sealing part 123 is installed into the receiving part 121 to complete the sealing. The flushing component 13, drainage component 14, and data transmission line 110, once installed, pass through the hollow space formed by the connector 21 and guide component 22 from bottom to top. This allows the monitored permeation pressure data to be transmitted outside the borehole, and the water flow outside the borehole can flow into the borehole through the flushing component 13 to flush the monitoring component 11 and the filling material. Simultaneously, the flushed water containing impurities can be discharged from the borehole along the drainage component 14 when the pressure inside the receiving component 12 increases. The connector 21 is then connected to the first sealing part 122, and then the sealing component 23 and the limiting component 24 are sequentially fitted onto the guide component 22 from bottom to top, with the sealing component 23 being the topmost layer. The operating part 30 is fitted onto the guide part 22, the operating part 31 is threadedly connected to the upper end of the guide part 22, the pushing part 33 abuts against the uppermost sealing part 23, and a thrust bearing can be installed between the connecting part 32 and the operating part 31. Finally, the ground assembly of the surrounding rock seepage pressure monitoring device 100 is completed. This makes the operation in the borehole only the compression of the sealing part 23, reducing the difficulty of operation and improving the deployment efficiency.

[0067] Regarding the embodiments of this application, it should also be noted that, without conflict, the embodiments of this application and the features in the embodiments can be combined with each other to obtain new embodiments.

[0068] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. The scope of protection of this application shall be determined by the scope of the claims.

Claims

1. A device for monitoring the permeability pressure of surrounding rock, characterized in that, It includes: Monitoring components, sealing components, and operating components, The monitoring component is detachably mounted on the sealing component and configured to contact the groundwater in the borehole of the surrounding rock in order to monitor the seepage pressure in the borehole. The plugging assembly is configured to fix the monitoring assembly at a predetermined depth within the borehole and to allow the permeation pressure data monitored by the monitoring assembly to be transmitted outside the borehole. The operating component is disposed on the sealing assembly and is configured to be able to be subjected to external force to seal the borehole, thereby isolating the monitoring component and the groundwater in the borehole from the outside.

2. The apparatus according to claim 1, characterized in that, The sealing assembly includes a connector, a guide, and a sealing component. The connector is fixedly mounted on the guide member and configured to be detachably connected to the monitoring component. The sealing member is disposed on the guide member and configured to conform to the guide member and the borehole under the action of the operating member, so as to seal the borehole. The guide is configured to extend outside the borehole to adjust the depth of the connector fixed thereto within the borehole, thereby fixing the monitoring component to a predetermined depth within the borehole.

3. The apparatus according to claim 2, characterized in that, The sealing assembly further includes multiple limiting members. The sealing members are configured in multiple ways, and the limiting members are disposed on the guide members and between adjacent sealing members.

4. The apparatus according to claim 1, characterized in that, The monitoring component includes a monitoring element, a receiving element, a flushing element, and a drainage element. The receiving element is configured to accommodate the monitoring element and to allow groundwater in the borehole to flow through the monitoring element in order to monitor the seepage pressure in the borehole. The container is filled with a filler material to secure the monitoring device and filter impurities from the groundwater. The flushing element is configured to flush out impurities in the filler. The drainage element is configured to drain the liquid used to flush the filler from the container. The receiving element is configured to be detachably connected to the connector of the sealing assembly.

5. The apparatus according to claim 4, characterized in that, The receiving component includes a receiving portion, a first sealing portion, and a second sealing portion. The first sealing part is fixedly disposed in the receiving part, and the second sealing part is detachably disposed in the receiving part, so that the monitoring element, the filler, and the flushing element are retained within the receiving part. The first sealing part is configured to be detachably connected to the connector.

6. The apparatus according to claim 5, characterized in that, The data transmission line of the monitoring device, the flushing device, and the draining device are configured to extend through the first sealing portion and out of the receiving portion.

7. The apparatus according to claim 6, characterized in that, The guide and the connector of the plugging assembly are hollow so that the data transmission line extends out of the borehole along the guide, thereby transmitting the permeation pressure data monitored by the monitoring device to the outside of the borehole.

8. The apparatus according to any one of claims 1-7, characterized in that, The operating component includes an operating part, a connecting part, and a pushing part. The connecting part is configured to connect to both the operating part and the pushing part. The pushing part abuts against the sealing element of the sealing assembly. The operating part is configured to allow the connecting part to slide relative to the guide of the sealing assembly, so that the pushing part compresses the sealing member, thereby isolating the monitoring assembly and the groundwater in the borehole from the outside.

9. The apparatus according to claim 8, characterized in that, The connecting portion is configured to expose a predetermined length of the borehole, the predetermined length being greater than the deformation length of the sealing member in the axial direction of the borehole.

10. A method for monitoring the permeability pressure of surrounding rock, characterized in that, It employs the apparatus described in any one of claims 1-9.

11. The method according to claim 10, characterized in that, It includes the following steps: S10: Arrange the borehole and place the device inside the borehole; S20: Compress the plugging component of the plugging assembly using the operating element to isolate the monitoring component and the groundwater in the borehole from the outside; S30: Use the monitoring component to monitor the permeation pressure inside the borehole.

12. The method according to claim 11, characterized in that, Step S20 specifically includes the following steps: S21: When deploying the device, determine that the monitoring component reaches a predetermined depth position in the borehole; S22: Push the jacking part of the operating member toward the monitoring component to axially compress the sealing member so as to isolate the monitoring component and the groundwater in the borehole from the outside.

13. The method according to claim 11, characterized in that, Step S30 specifically includes the following steps: S31: Connect the data transmission line of the monitoring component to the data acquisition device outside the borehole; S32: Connect the flushing component of the monitoring assembly to the water supply device outside the borehole.

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