Axial stress detection stress meter and coupling stress measurement module
By designing an axial stress detection stress gauge and a coupled stress measurement module, the problem that existing borehole stress gauges cannot detect axial stress has been solved, enabling accurate monitoring of borehole axial stress, improving the comprehensiveness and accuracy of monitoring, and making it suitable for safety maintenance in underground coal mines.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- UROICA (SHANDONG) MINING TECH CO LTD
- Filing Date
- 2025-05-14
- Publication Date
- 2026-05-15
AI Technical Summary
Existing borehole stress gauges cannot effectively detect the axial stress in boreholes, resulting in biased and distorted monitoring results, which cannot timely maintain the safety of underground coal mine faces and roadways.
Design an axial stress detection stress gauge, including a telescopic tube, an anchoring device, and an oil pipe assembly. The axial stress is detected by the change of hydraulic oil in the telescopic tube, and comprehensive stress monitoring is performed by combining it with a coupled stress measurement module.
It enables accurate detection of borehole axial stress, integrates axial and radial stress detection, improves the comprehensiveness and accuracy of monitoring, and can promptly capture signs of rockburst and coal and gas outburst.
Smart Images
Figure CN224247185U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of borehole original rock stress measurement technology, specifically to an axial stress detection stress gauge and a coupled stress measurement module. Background Technology
[0002] The forces exerted on coal, rock, and support structures by mining activities are called mining stress. Mining alters the original rock stress field, creating a new stress state. Predicting and evaluating the impact hazard of coal and rock strata from a stress field perspective, and researching stress monitoring sensors for deep mining areas prone to rockbursts, is of practical significance. During underground coal mining, the stress field state at various locations and in various directions within the rock mass frequently changes. With increasing mining depth and space, these changes become more pronounced, leading to a high concentration of stress and resulting in stress problems in the coal and rock mass, such as rockbursts. Therefore, accurately monitoring changes in surrounding rock stress is crucial for maintaining the safety of the mining area and roadways.
[0003] Currently, the main equipment used to monitor changes in surrounding rock stress is borehole stress sensors. Existing hydraulic borehole stress gauges typically use only one hydraulic pressure pillow, or multiple pillows within a single borehole, to monitor stress changes from the surrounding rock around the borehole. Coal seam borehole stress gauges employ a special structure with a fluid-filled, expanding hydraulic pressure pillow, specifically designed for measuring relative stress within coal and rock masses, particularly for monitoring the changes in stress in the surrounding rock mass during mining operations.
[0004] Most common borehole stress gauges are hydraulic pillow-type stress gauges. However, these gauges only monitor stress in the circumferential and radial directions, failing to detect stress at the bottom of the borehole along the axial direction. This makes them unsuitable for detecting axial stress in boreholes prone to coal and gas outbursts. Since stress exists at various locations and in all directions within the rock mass, current equipment provides only a partial and distorted view of stress changes, failing to comprehensively reflect changes in rock mass stress and hindering timely maintenance of safety in underground coal mine faces and tunnels.
[0005] For those skilled in the art, how to detect the axial stress in a borehole is a technical problem that needs to be solved. Utility Model Content
[0006] The core of this invention is to provide an axial stress detection stress gauge. The telescopic tube can withstand axial stress and compresses the hydraulic oil inside. Axial stress can be detected by the change in oil pressure inside the telescopic tube. The specific solution is as follows:
[0007] An axial stress detection stress gauge includes a telescopic tube, an anchoring device, and an oil pipe assembly, wherein the anchoring device is fixed to the rear end of the telescopic tube along the axial direction.
[0008] The telescopic tube is capable of extending and retracting along the axial direction; the oil pipe assembly is connected to the inner cavity of the telescopic tube and is used to deliver hydraulic oil to the telescopic tube;
[0009] The front end of the telescopic tube is used to press against the end of the borehole, and the anchoring device is used to press against the side wall of the borehole to axially limit the rear end of the telescopic tube from moving backward.
[0010] Optionally, the telescopic tube is a corrugated tube.
[0011] Optionally, the telescopic tube is provided with a venting mechanism, which is used to release the gas inside the telescopic tube during the oil filling stage.
[0012] Optionally, the venting mechanism is located at the front end of the telescopic tube.
[0013] Optionally, the venting mechanism includes a venting bolt and a combination washer, wherein the venting bolt is threadedly connected to the telescopic tube, and the combination washer is installed between the venting bolt and the telescopic tube to achieve a seal.
[0014] Optionally, the anchoring device includes a positioning post and an expansion claw, the positioning post being fixed to the rear end of the telescopic tube, and the expansion claw being inserted into the positioning post;
[0015] The expanding claws expand gradually from front to back.
[0016] Optionally, a plurality of the expansion claws are centrally symmetrically distributed about the axis of the telescopic tube, and the inner ends of the expansion claws are relatively fixed.
[0017] Optionally, the tubing assembly includes a tubing and a female connector, with the front end of the tubing connected to the telescopic tube and the female connector fixed to the rear end of the tubing.
[0018] Optionally, the front end of the telescopic tube is provided with a tapering section, the outer diameter of which gradually shrinks from back to front.
[0019] This utility model also provides a coupled stress measurement module, including the axial stress detection stress gauge described in any of the above claims, and also including the radial stress detection stress gauge; the axial stress detection stress gauge and the radial stress detection stress gauge are respectively connected to their respective pressure valve bodies through external oil pipes, and the pressure valve body is provided with an oil return switch, a male connector, and a pressure gauge.
[0020] This application provides an axial stress detection stress gauge. An anchoring device is fixed to the rear end of a telescopic tube along its axial direction to axially limit the rear end of the tube, preventing it from retracting. An oil pipe assembly supplies hydraulic oil to the telescopic tube, generating pressure within its inner cavity. The axial stress detection stress gauge is placed at the deepest point of the borehole, with the front end of the telescopic tube pressing against the end of the borehole. When the surrounding rock undergoes axial deformation, pressure is applied to the front end of the telescopic tube, causing it to extend and retract along its axial direction. The anchoring device axially limits the rear end of the telescopic tube, preventing it from retracting. Therefore, the axial pressure causes the telescopic tube to shorten, increasing the oil pressure inside. Axial stress can be detected by sensing changes in the oil pressure inside the telescopic tube. This application's coupled stress measurement module integrates axial stress detection and radial stress detection, achieving the aforementioned technical effects. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a front view of a specific embodiment of the axial stress detection stress gauge of this utility model;
[0023] Figure 2 for Figure 1 Side view corresponding to the embodiment;
[0024] Figure 3 This is an isometric drawing of a specific embodiment of the axial stress detection stress gauge of this utility model;
[0025] Figure 4 for Figure 3 Side view corresponding to the embodiment;
[0026] Figure 5 for Figure 3 Axonometric sectional view of the corresponding embodiment;
[0027] Figure 6 A partial cross-sectional view showing the fit between the pressure valve body and the external oil pipe;
[0028] Figure 7 for Figure 6 Cross-sectional view along the AA direction.
[0029] The image includes:
[0030] Telescopic tube 10, tapered section 101, anchoring device 20, positioning post 201, expansion claw 202, oil pipe assembly 30, oil pipe 301, female connector 302, venting mechanism 40, venting bolt 401, combination washer 402, pressure valve body 50, return oil switch 501, male connector 502, pressure gauge 503, external oil pipe 60. Detailed Implementation
[0031] To enable those skilled in the art to better understand the technical solution of this utility model, the axial stress detection stress gauge and the coupled stress measurement module of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0032] The axial stress detection stress gauge of this invention is installed in the borehole to detect the axial stress of the borehole. In use, the stress gauge can be placed in a horizontal borehole, or in an inclined or vertical borehole.
[0033] Combination Figure 1 , Figure 3 As shown, this utility model discloses an axial stress detection stress gauge, comprising a telescopic tube 10, an anchoring device 20, an oil pipe assembly 30, and other structures. The telescopic tube 10 has an internal cavity for accommodating hydraulic oil, which fills the cavity during axial stress detection. The telescopic tube 10 can extend and retract along its axial direction, such as... Figure 1 The X-axis direction shown is the same as the length extension direction of the entire telescopic 10, which is consistent with the length extension direction of the borehole.
[0034] It is divided into two ends along the axis (X-axis), with the front end being the deeper part of the borehole. Figure 1 The middle left end), the rear end is the shallower part of the borehole ( Figure 1 (Right end). The anchoring device 20 is fixed to the rear end of the telescopic pipe 10 along the axial direction. It should be noted that the anchoring device 20 can be fixed either to the rear end face of the telescopic pipe 10 or to the side wall of the telescopic pipe 10 near the rear end face. These fixing methods are considered as fixing to the rear end of the telescopic pipe 10. The anchoring device 20 is at least axially fixed relative to the telescopic pipe 10. Under normal circumstances, the anchoring device 20 and the telescopic pipe 10 can be completely fixed, that is, the anchoring device 20 cannot rotate relative to the telescopic pipe 10, nor can it move axially. The anchoring device 20 and the telescopic pipe 10 are fixed as a whole. The anchoring device 20 can restrict the rear end of the telescopic pipe 10 from moving backward. The telescopic pipe 10 should avoid interfering with the forward movement of the telescopic pipe 10 as much as possible to avoid hindering the placement process of the telescopic pipe 10 into the borehole.
[0035] The oil pipe assembly 30 is connected to the inner cavity of the telescopic pipe 10. The oil pipe assembly 30 serves as a pipeline for conveying hydraulic oil and is used to deliver hydraulic oil to the telescopic pipe 10. The oil pipe assembly 30 can be connected to an external oil pipe 60, the rear end of which can extend outside the borehole and be connected to the oil supply assembly.
[0036] When the telescopic tube 10 is subjected to an axial force, the telescopic tube 10 can extend and retract along the axial direction. When the telescopic tube 10 extends and retracts, it will change the pressure of the hydraulic oil in the inner cavity of the telescopic tube 10. During placement, the front end of the telescopic tube 10 is positioned against the end of the borehole, and the anchoring device 20 presses against the side wall of the borehole to axially limit the rear end of the telescopic tube 10 from moving backward. When the surrounding rock undergoes axial deformation, the end of the borehole (the deepest end face of the borehole) will squeeze the front end of the telescopic tube 10, pushing the front end of the telescopic tube 10 backward. However, the rear end of the telescopic tube 10 is restricted by the anchoring device 20, preventing it from moving backward. In other words, the front end of the telescopic tube 10 retracts while the rear end remains fixed, thus shortening the overall length of the telescopic tube 10. When the overall length of the telescopic tube 10 shortens, the oil pressure inside the cavity increases. When the forces are mutual, the hydraulic oil pressure increases accordingly when the axial stress of the surrounding rock increases. The hydraulic oil pressure is positively correlated with the stress of the surrounding rock. By detecting the pressure of the hydraulic oil inside the telescopic tube 10, the axial stress of the surrounding rock can be detected.
[0037] In use, the inner cavity of the telescopic tube 10 is pre-filled with hydraulic oil. The entire axial stress detection stress gauge is then placed forward to the deepest point of the borehole, with the front end of the telescopic tube 10 pressing against the end of the borehole. The telescopic tube 10 is connected to the oil supply assembly outside the borehole via the oil pipe assembly 30 and the external oil pipe 60. A certain oil pressure, such as an initial oil pressure of 2 MPa, is maintained inside the telescopic tube 10. Under this initial oil pressure, the length of the telescopic tube 10 is stretched, causing the front end to press tightly against the end of the borehole, while the rear end is limited by the anchoring device 20. Since the anchoring device 20 fixes the initial position of the rear end of the telescopic tube 10, the increase in the oil pressure inside the telescopic tube 10 can be considered as limited circumferential expansion and contraction. Because the structural diameter of the telescopic tube 10 is smaller than the borehole diameter, the circumferential thickness can be considered constant. Mechanical performance tests can verify the functional relationship between the oil pressure inside the telescopic tube 10 and the surrounding rock stress, thereby obtaining the axial stress value of the surrounding rock.
[0038] Because the telescopic pipe 10 is pre-filled with oil pressure, the front end of the telescopic pipe 10 can always be pressed against the end of the borehole. When the surrounding rock further squeezes the front end of the telescopic pipe 10, the oil pressure inside the telescopic pipe 10 rises. When the stress of the surrounding rock decreases, the front end of the telescopic pipe 10 moves further forward, and the oil pressure inside the telescopic pipe 10 drops.
[0039] Based on the above solution, the telescopic tube 10 of this utility model is a corrugated tube, combined with... Figure 3 , Figure 5As shown, the bellows structure is a tubular elastic sensitive element formed by connecting corrugated sheets along the folding and stretching direction, which can deform and stretch along the axial direction. The bellows has several corrugated sections with alternating circumferential sizes. The deformation of the bellows mainly occurs in the axial direction, while the radial direction can be considered as having a constant dimension.
[0040] The corrugations in a bellows are not entirely uniform at different locations; some corrugations have a larger outer diameter, such as... Figure 3 , Figure 5 The two corrugated protrusions near the front end are larger, and larger corrugations are more prone to elastic deformation and deformation. By changing the size of the corrugations locally, the axial deformation of the bellows can be made more concentrated, and a smaller change in oil pressure can cause the bellows to expand and contract axially.
[0041] In addition to using a corrugated pipe, the telescopic tube 10 can also adopt a hydraulic cylinder structure with a sliding sleeve. Any structure that can achieve axial extension and contraction while maintaining almost no radial deformation should be included within the protection scope of this utility model.
[0042] Combination Figure 1 As shown, the telescopic tube 10 is equipped with a venting mechanism 40. The venting mechanism 40 is used to release the gas inside the telescopic tube 10 during the oil filling stage. The telescopic tube 10 is pre-filled with hydraulic oil outside the borehole. During oil filling, the venting mechanism 40 is opened to release the air, and the venting mechanism 40 is closed when the hydraulic oil is full. Air is easily compressed, which can interfere with the accuracy of stress detection. The venting mechanism 40 can release gas to reduce interference.
[0043] Combination Figure 1 As shown, the venting mechanism 40 is located at the front end of the telescopic tube 10 to avoid interference with other structures. When the telescopic tube 10 is pre-filled with oil, first turn the front end of the telescopic tube 10 upwards and open the venting mechanism 40. After all the air is discharged, close the venting mechanism 40.
[0044] Combination Figure 5 As shown, the venting mechanism 40 of this utility model includes a venting bolt 401 and a combination washer 402. The venting bolt 401 is threadedly connected to the telescopic tube 10, and the combination washer 402 is installed between the venting bolt 401 and the telescopic tube 10 to achieve a seal. A threaded hole is provided at the front end of the telescopic tube 10, and the venting bolt 401 is threadedly connected to the threaded hole. The combination washer 402 is an annular sealing ring, which is fitted over the stud of the venting bolt 401. The combination washer 402 is pressed between the bolt head of the venting bolt 401 and the telescopic tube 10. The bolt head of the venting bolt 401 deforms the combination washer 402 by pressing it, thus achieving a seal between the venting bolt 401 and the telescopic tube 10 to prevent oil leakage.
[0045] In one specific embodiment, the anchoring device 20 includes a positioning post 201 and an expanding claw 202, combined with Figure 1 , Figure 3 As shown, the positioning post 201 is fixed to the rear end of the telescopic tube 10, and the expansion claw 202 is inserted into the positioning post 201. The positioning post 201 can be cylindrical, conical, or a combination of different shapes. The positioning post 201 supports the expansion claw 202, which extends beyond the side wall of the positioning post 201. At least three expansion claws 202 are provided, and the positioning and anti-backward movement of the rear end of the telescopic tube 10 is achieved by multiple expansion claws 202 contacting the inner wall of the borehole.
[0046] The expanding claws 202 gradually expand from front to back, forming a tapered structure. For a single expanding claw 202, its diameter may remain constant or its size and / or shape may vary. For multiple expanding claws 202, on a cross-section perpendicular to the axis of the positioning post 201, the area of the polygon formed by connecting two adjacent expanding claws 202 and all the expanding claws 202 on the cross-section varies in size across different cross-sections, with smaller areas on the front cross-sections and larger areas on the rear cross-sections.
[0047] Several expansion claws 202 are centrally symmetrically distributed about the axis of the telescopic tube 10. The inner ends of the expansion claws 202 are relatively fixed, and the expansion claws 202 are relatively fixed to each other. However, the expansion claws 202 and the positioning post 201 are not relatively fixed. The positioning post 201 is hollow inside, and an opening is provided on the side wall of the positioning post 201 for the expansion claws 202 to pass through. The inner ends of the expansion claws 202 located in the inner cavity of the positioning post 201 are relatively fixed. The distance between the fixed point and the outermost end of the expansion claw 202 is farther, making it easier for the expansion claws 202 to undergo elastic deformation. During the process of placing the expansion claws 202 into the hole from back to front, the obstruction of the expansion claws 202 can be reduced.
[0048] Figure 1 and Figure 5 The expansion claws 202 shown are fixed to each other at their inner ends, and elastic deformation is generated by the elasticity of the expansion claws 202 themselves. It should be noted that multiple expansion claws 202 can be all fixed relative to each other, or some of them can be divided into a group and fixed relative to each other. These specific forms should be included within the protection scope of this utility model.
[0049] In addition to the above-mentioned installation structure, the expansion claw 202 can also adopt other assembly forms, such as directly welding and fixing the expansion claw 202 to the side wall of the positioning post 201; or hinge one end of the expansion claw 202 to the side wall of the positioning post 201, and setting an elastic structure between the expansion claw 202 and the positioning post 201, the elastic structure applying an elastic force to the expansion claw 202 away from the positioning post 201.
[0050] Combination Figure 1, Figure 3 As shown, the oil pipe assembly 30 of this utility model includes an oil pipe 301 and a female connector 302. The front end of the oil pipe 301 is connected to the telescopic pipe 10, and the inner cavity of the oil pipe 301 communicates with the inner cavity of the telescopic pipe 10 to ensure that oil is supplied to the telescopic pipe 10 through the oil pipe 301. The female connector 302 is fixed to the rear end of the oil pipe 301. The female connector 302 serves as a connection structure for insertion and connection with the male connector on the external oil pipe 60.
[0051] Combination Figure 2 , Figure 4 As shown, the oil pipe 301 is not a straight pipe. Oil pipe 301 is used to avoid the positioning post 201, and its front end is fixed to the side of the positioning post 201. The diameter of the positioning post 201 is smaller than the diameter of the telescopic pipe 10, and the positioning post 201 and the telescopic pipe 10 are coaxially arranged. The front end of the oil pipe 301 is fixed to the rear end face of the telescopic pipe 10, without interfering with the positioning post 201. Therefore, the initial section of the oil pipe 301 is far from the axis of the positioning post 201. The length of the oil pipe 301 is greater than the length of the positioning post 201. When the oil pipe 301 extends backward to a position without the positioning post 201, the oil pipe 301 bends towards the axis of the positioning post 201, bringing it closer to the axis of the positioning post 201, thus bringing the female connector 302 closer to the axis of the positioning post 201. The axis of the female connector 302 can coincide with the axis of the positioning post 201, or it can be eccentrically arranged; these specific arrangements are acceptable.
[0052] Combination Figure 1 As shown, the front end of the telescopic tube 10 is provided with a tapered section 101. The shape of the tapered section 101 can be a cone or a pyramid. The outer diameter of the tapered section 101 gradually shrinks from back to front. The tapered section 101 reduces the obstruction during the placement process into the borehole and can prevent the front end of the telescopic tube 10 from being stuck.
[0053] This invention also provides a coupled stress measurement module that integrates both axial stress measurement and radial stress measurement functions. It includes the aforementioned axial stress detection stress gauge, as well as a radial stress detection stress gauge; the axial stress detection stress gauge is used to detect axial stress, and the radial stress detection stress gauge is used to detect radial stress. Two radial stress detection stress gauges can be installed to detect stress in two mutually perpendicular radial directions respectively. Using the axial stress detection stress gauge in conjunction with the original circumferential (radial) borehole stress gauge provides comprehensive detection dimensions, small errors, simple installation, convenient operation, and high sensitivity. It is suitable for large-diameter boreholes, enabling early detection of signs of rockbursts and coal and gas outbursts.
[0054] Axial stress gauges and radial stress gauges are connected to their respective pressure valve bodies 50 via external oil pipes 60. Each axial stress gauge is connected to one pressure valve body 50, and each radial stress gauge is connected to one pressure valve body 50, thus detecting stress in the corresponding direction based on oil pressure changes. The pressure valve bodies 50 are located outside the borehole, combined with... Figure 6 , Figure 7 As shown, the pressure valve body 50 is equipped with a return oil switch 501, a male connector 502, and a pressure gauge 503. The return oil switch 501 controls the oil flow of the external oil pipe 60. The male connector 502 is used for insertion and connection to an external oil supply assembly, which supplies oil to the external oil pipe 60. Oil pipe 301 is inserted into a connector of the pressure valve body 50, supplying oil to the telescopic pipe 10 through the external oil pipe 60 and oil pipe 301. The pressure gauge 503 is used to detect oil pressure, and the axial stress value is obtained based on the oil pressure value detected by the pressure gauge 503.
[0055] During use, the oil pump fills the telescopic tube 10 to maintain an initial oil pressure of 2MPa. When subjected to corresponding axial residual pressure, the telescopic tube 10 can be axially stretched and elongated. Since the anchoring device 20 fixes the initial installation position of the rear end of the telescopic tube 10, the initial increase in oil pressure inside the telescopic tube 10 can be regarded as circumferential limited expansion and contraction. Since the structural diameter of the telescopic tube 10 is smaller than the borehole diameter, the circumferential thickness can be regarded as constant.
[0056] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. An axial stress detection stress gauge, characterized in that, It includes a telescopic pipe (10), an anchoring device (20), and a tubing assembly (30), wherein the anchoring device (20) is fixed to the rear end of the telescopic pipe (10) along the axial direction; The telescopic tube (10) is capable of extending and retracting along the axial direction; the oil pipe assembly (30) is connected to the inner cavity of the telescopic tube (10) and is used to deliver hydraulic oil to the telescopic tube (10); The front end of the telescopic tube (10) is used to press against the end of the borehole, and the anchoring device (20) is used to press against the side wall of the borehole to axially limit the rear end of the telescopic tube (10) to move backward.
2. The axial stress detection stress gauge according to claim 1, characterized in that, The telescopic tube (10) is a corrugated tube.
3. The axial stress detection stress gauge according to claim 1, characterized in that, The telescopic tube (10) is provided with a venting mechanism (40), which is used to release the gas inside the telescopic tube (10) during the oil filling stage.
4. The axial stress detection stress gauge according to claim 3, characterized in that, The venting mechanism (40) is located at the front end of the telescopic tube (10).
5. The axial stress detection stress gauge according to claim 4, characterized in that, The venting mechanism (40) includes a venting bolt (401) and a combination washer (402). The venting bolt (401) is threaded to the telescopic tube (10). The combination washer (402) is installed between the venting bolt (401) and the telescopic tube (10) to achieve a seal.
6. The axial stress detection stress gauge according to claim 1, characterized in that, The anchoring device (20) includes a positioning post (201) and an expansion claw (202). The positioning post (201) is fixed to the rear end of the telescopic tube (10), and the expansion claw (202) is inserted into the positioning post (201). The expanding claw (202) expands gradually from front to back.
7. The axial stress detection stress gauge according to claim 6, characterized in that, Several of the expansion claws (202) are centrally symmetrically distributed about the axis of the telescopic tube (10), and the inner ends of the expansion claws (202) are relatively fixed.
8. The axial stress detection stress gauge according to claim 1, characterized in that, The tubing assembly (30) includes a tubing (301) and a female connector (302). The front end of the tubing (301) is connected to the telescopic pipe (10), and the female connector (302) is fixed to the rear end of the tubing (301).
9. The axial stress detection stress gauge according to claim 1, characterized in that, The telescopic tube (10) has a tapered section (101) at its front end, and the outer diameter of the tapered section (101) gradually shrinks from back to front.
10. A coupled stress measurement module, characterized in that, The device includes the axial stress detection stress gauge according to any one of claims 1 to 9, and also includes the radial stress detection stress gauge; the axial stress detection stress gauge and the radial stress detection stress gauge are respectively connected to their respective pressure valve bodies (50) via external oil pipes (60), and the pressure valve body (50) is provided with an oil return switch (501), a male connector (502), and a pressure gauge (503).