Multi-directional crustal stress self-adaptive adjusting mechanical structure

Abstract

The invention, which belongs to the technical field of crustal stress measurement, discloses a multidirectional crustal stress adaptive adjustment mechanical structure comprising two pressure sensors, the lower end of the pressure sensor located at the lower side is fixedly connected with a lower blocking mechanism, and the lower end of the pressure sensor located at the lower side is fixedly connected with an upper blocking mechanism. The upper end of the pressure sensor located on the upper side is fixedly connected with an upper plugging mechanism, and the distance between the first rubber plug and the second rubber plug can be adjusted according to the length of a detected drill hole section through cooperation of the lower plugging mechanism and the upper plugging mechanism when rock stratum crustal stress detection is conducted through a hydraulic fracturing method. The ground stress test can be carried out on a drilling section with any length, then high-pressure water is injected into a drilling hole through the upper plugging mechanism, so that a group of longitudinal cracks passing through the axis of the drilling hole are generated in a drilling surrounding rock, and the size and direction of the ground stress can be determined according to the relationship between a water pressure value and the original rock stress in the water injection fracturing process. The function of detecting the multidirectional crustal stress of the drilling sections with different lengths in an adjustable mode is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of ground stress measurement, and more specifically to a multi-directional ground stress self-adaptive regulating mechanical structure. Background Art

[0002] Geostress is the stress existing in the earth's crust. In a broad sense, it also refers to the stress inside the earth. It includes stress generated by geothermal heat, gravity, changes in the earth's rotation speed and other factors. Geomechanics believes that the stress activity in the earth's crust is the reason why the earth's crust overcomes resistance and continues to move and develop; all deformations in the earth's crust, such as folds and fractures (see joints, faults), are the result of geostress.

[0003] Geostress testing is an important means to determine the properties of engineering rock mass. By accurately measuring geostress, we can gain a deep understanding of the mechanical properties of the rock mass and then conduct surrounding rock stability analysis, which is crucial for the scientific design and decision-making of rock engineering excavation. Geostress is not only the fundamental force that causes deformation and damage in underground or open-pit rock excavation projects, but also a key factor affecting engineering safety in many fields such as mineral resource mining, water conservancy and hydropower engineering, and transportation tunnel construction.

[0004] Traditional geostress testing methods have many limitations, such as complex operation, limited test range, inaccurate test results, etc. Among them, hydraulic fracturing, as one of the most commonly used methods in geostress testing, has the advantages of relatively simple operation, large test range, and the ability to perform three-dimensional or four-dimensional stress analysis, but it still faces some technical challenges in practical applications. For example, how to flexibly adjust the test device according to the length of the test borehole section to meet the needs of geostress testing at different depths; how to ensure the stability and accuracy of the test device in the borehole to improve the accuracy and reliability of geostress testing.

[0005] Therefore, in order to solve the above problems, a multi-directional ground stress adaptive adjustment mechanical structure is proposed. Summary of the invention

[0006] 1. Technical issues to be solved

[0007] In view of the problems existing in the prior art, the object of the present invention is to provide a multi-directional geostress adaptive adjustment mechanical structure, which can realize the function of adjustable detection of multi-directional geostress of drilling sections of different lengths.

[0008] 2. Technical solution

[0009] To solve the above problems, the present invention adopts the following technical solutions.

[0010] A multi-directional ground stress adaptive adjustment mechanical structure comprises two pressure sensors, wherein the lower end of the pressure sensor located at the lower side is fixedly connected to a lower blocking mechanism, and the upper end of the pressure sensor located at the upper side is fixedly connected to an upper blocking mechanism.

[0011] Furthermore, the lower blocking mechanism includes a rubber plug, the upper end of which is fixedly connected to the lower end of the pressure sensor located at the lower side, the inner cavity of the rubber plug is fixedly connected to an electric heating plate, the inner surface of the electric heating plate is fixedly connected to a wiring tube, and an interface is opened at the upper end of the wiring tube.

[0012] Furthermore, the upper plugging mechanism includes an injection pipe, the outer surface of the injection pipe is fixedly connected to a shell, the rear end of the shell is fixedly connected to a reciprocating component, the rear end of the shell is fixedly connected to an adjustment component, the lower end of the shell is fixedly connected to an upper plugging component, and the interior of the upper plugging component is fixedly connected to a positioning component.

[0013] Furthermore, the upper plugging assembly includes a rubber plug 2, the lower end of the rubber plug 2 is fixedly connected to the upper end of the pressure sensor located on the upper side, the upper and lower ends of the rubber plug 2 are provided with a positioning groove 1, the upper and lower ends of the rubber plug 2 are provided with a positioning groove 2, the inner surfaces of the two positioning grooves 2 are fixedly connected to the outer surface of the injection pipe, and the inner cavity of the rubber plug 2 is fixedly connected to an electric heating ring.

[0014] Furthermore, the positioning assembly includes a positioning tube, and the upper and lower ends of the positioning tube are provided with wire outlets, and the inner surfaces of the upper and lower ends of the positioning tube are fixedly connected with sealing rings.

[0015] Furthermore, the reciprocating component includes a motor 1, the front end of the motor 1 is fixedly connected to the rear end of the shell, the output end of the motor 1 is fixedly connected to a reciprocating screw via a coupling, the outer surface of the reciprocating screw is slidably connected to a driving head, the right end of the driving head is fixedly connected to a winding tube, the front end of the reciprocating screw is rotatably connected to a rotating head 1, and the front end of the rotating head 1 is fixedly connected to the front wall of the inner cavity of the shell.

[0016] Furthermore, the adjustment component includes motor 2, the front end of which is fixedly connected to the outer shell, the output end of which is fixedly connected to a rotating shaft via a coupling, the outer surface of the rotating shaft is fixedly connected to a wire drum, the outer surface of the wire drum is wound with a connecting wire, the front end of the rotating shaft is rotatably connected to a rotating head 2, and the front end of the rotating head 2 is fixedly connected to the front wall of the inner cavity of the outer shell.

[0017] Furthermore, the outer surface of the positioning tube is fixedly connected to the inner surface of the two positioning grooves.

[0018] Furthermore, the outer surface of the connecting wire is slidably connected to the inner surfaces of the two wire outlets, and the outer surface of the connecting wire is slidably connected to the inner surfaces of the two sealing rings.

[0019] Furthermore, the outer surface of the connecting line is fixedly connected to the inner surface of the interface, and the outer surface of the connecting line is slidably connected to the inner surface of the coiling tube.

[0020] 3. Beneficial effects

[0021] Compared with the prior art, the advantages of the present invention are:

[0022] This scheme uses the cooperation of the lower plugging mechanism and the upper plugging mechanism. When the hydraulic fracturing method is used to detect the ground stress of the rock formation, the ground stress in multiple directions can be measured, and it can be adjusted according to the test drilling section, so that the distance between the rubber plug one and the rubber plug two is changed. The ground stress test can be carried out on the drilling section of any distance, and then high-pressure water is injected into the borehole through the upper plugging mechanism, causing a group of longitudinal cracks passing through the borehole axis in the surrounding rock of the borehole. According to the relationship between the water pressure value and the original rock stress during the water injection fracturing process, the size and direction of the ground stress can be determined. By measuring the ground stress, the mechanical properties of the rock mass can be understood, and then the stability analysis of the surrounding rock can be carried out, so as to realize the scientific design and decision-making of rock engineering excavation and improve the practicality of the mechanical structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the lower blocking mechanism of the present invention;

[0025] Figure 3 It is a schematic diagram of the upper blocking mechanism of the present invention;

[0026] Figure 4 It is a schematic diagram of the upper plugging assembly of the present invention;

[0027] Figure 5 It is a schematic diagram of the positioning component of the present invention;

[0028] Figure 6 It is a schematic diagram of a reciprocating assembly of the present invention;

[0029] Figure 7 It is a schematic diagram of the adjustment component of the present invention.

[0030] Description of the numbers in the figure:

[0031] 1. Pressure sensor; 2. Lower plugging mechanism; 21. Rubber plug 1; 22. Electric heating plate; 23. Wiring tube; 24. Interface; 3. Upper plugging mechanism; 31. Injection tube; 32. Housing; 33. Reciprocating assembly; 331. Motor 1; 332. Reciprocating screw; 333. Rotating head 1; 334. Driving head; 335. Coiling tube; 34. Adjusting assembly; 341. Motor 2; 342. Rotating shaft; 343. Rotating head 2; 344. Wire reel; 345. Connecting wire; 35. Upper plugging assembly; 351. Rubber plug 2; 352. Positioning slot 1; 353. Positioning slot 2; 354. Electric heating ring; 36. Positioning assembly; 361. Positioning tube; 362. Wire outlet; 363. Sealing ring. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Example:

[0036] See also Figure 1-7 A multi-directional ground stress adaptive adjustment mechanical structure includes two pressure sensors 1. The lower end of the pressure sensor 1 located on the lower side is fixedly connected to a lower blocking mechanism 2, and the upper end of the pressure sensor 1 located on the upper side is fixedly connected to an upper blocking mechanism 3.

[0037] This solution can measure the ground stress of the rock formation by cooperating with the lower blocking mechanism 2 and the upper blocking mechanism 3. During use, the upper blocking mechanism 3 is first fixed in the borehole, and then the lower blocking mechanism 2 is lowered according to the required detection length, and high-pressure water is injected into the borehole, causing a group of longitudinal cracks passing through the borehole axis in the surrounding rock of the borehole. The size and direction of the ground stress are determined based on the relationship between the water pressure value and the original rock stress during the water injection fracturing process, and the multi-directional ground stress can be accurately obtained.

[0038] See also Figure 2-7 The upper plugging mechanism 3 includes an injection pipe 31, the outer surface of the injection pipe 31 is fixedly connected to a shell 32, the rear end of the shell 32 is fixedly connected to a reciprocating component 33, the rear end of the shell 32 is fixedly connected to an adjusting component 34, the lower end of the shell 32 is fixedly connected to an upper plugging component 35, and the interior of the upper plugging component 35 is fixedly connected to a positioning component 36.

[0039] The upper plugging assembly 35 includes a rubber plug 351, the lower end of the rubber plug 351 is fixedly connected to the upper end of the pressure sensor 1 located on the upper side, the upper and lower ends of the rubber plug 351 are provided with a positioning groove 352, the upper and lower ends of the rubber plug 351 are provided with a positioning groove 353, the inner surfaces of the two positioning grooves 353 are fixedly connected to the outer surface of the injection pipe 31, and the inner cavity of the rubber plug 351 is fixedly connected to an electric heating ring 354.

[0040] The positioning assembly 36 includes a positioning tube 361, the outer surface of the positioning tube 361 is fixedly connected to the inner surfaces of the two positioning grooves 352, the upper and lower ends of the positioning tube 361 are provided with outlets 362, and the inner surfaces of the upper and lower ends of the positioning tube 361 are fixedly connected with sealing rings 363.

[0041] The reciprocating assembly 33 includes a motor 331, the front end of the motor 331 is fixedly connected to the rear end of the shell 32, the output end of the motor 331 is fixedly connected to the reciprocating screw 332 through a coupling, the outer surface of the reciprocating screw 332 is slidably connected to a driving head 334, the right end of the driving head 334 is fixedly connected to a winding tube 335, the front end of the reciprocating screw 332 is rotatably connected to a rotating head 333, and the front end of the rotating head 333 is fixedly connected to the front wall of the inner cavity of the shell 32.

[0042] The adjustment component 34 includes a motor 2 341, the front end of the motor 2 341 is fixedly connected to the housing 32, the output end of the motor 2 341 is fixedly connected to the rotating shaft 342 through a coupling, the outer surface of the rotating shaft 342 is fixedly connected to the wire drum 344, the outer surface of the wire drum 344 is wound with a connecting wire 345, the outer surface of the connecting wire 345 is slidably connected to the inner surfaces of the two outlets 362, the outer surface of the connecting wire 345 is slidably connected to the inner surfaces of the two sealing rings 363, the outer surface of the connecting wire 345 is fixedly connected to the inner surface of the interface 24, the outer surface of the connecting wire 345 is slidably connected to the inner surface of the winding tube 335, the front end of the rotating shaft 342 is rotatably connected to the rotating head 2 343, and the front end of the rotating head 2 343 is fixedly connected to the front wall of the inner cavity of the housing 32.

[0043] The lower blocking mechanism 2 includes a rubber plug 21, the upper end of the rubber plug 21 is fixedly connected to the lower end of the pressure sensor 1 located at the lower side, the inner cavity of the rubber plug 21 is fixedly connected to a heating plate 22, the inner surface of the heating plate 22 is fixedly connected to a wiring tube 23, and the upper end of the wiring tube 23 is provided with an interface 24.

[0044] In this solution, the rubber plug 351 is placed into the drilled hole, and the electric heating ring 354 is energized to release heat inside the rubber plug 351, so that the rubber plug 351 expands due to the heat and then gets stuck on the inner surface of the rock wall of the drilled hole. Then the motor 341 is started, and the rotating shaft 342 rotates under the action of the motor 341 and the cooperation of the rotating head 343. When the rotating shaft 342 rotates, the wire drum 344 on its outer surface will also rotate. When the wire drum 344 rotates, the connecting wire 345 on its outer surface will start to be released. At this time, the connecting wire 345 will be released along the inner surface of the winding tube 335 and will slide down along the inner surfaces of the two outlets 362. The outer surface of the connecting wire 345 is fixedly connected to the inner surface of the interface 24, so when the connecting wire 345 is released, the rubber plug 21 will slide down along the inner wall of the borehole under the action of its own gravity. In this way, the distance between the rubber plug 2 351 and the rubber plug 21 can be controlled by controlling the length of the connecting wire 345 released, so as to achieve the purpose of measuring the ground stress of different borehole sections. When the position of the rubber plug 21 is lowered to the predetermined point, the action of the motor 2 341 is stopped, and the electric heating plate 22 is energized through the connecting wire 345 to allow the electric heating plate 22 to start releasing heat, so that the rubber plug 21 starts to expand under the action of the heat, so that the rubber plug 21 can also be tightly attached to the inner wall of the borehole.

[0045] When the positions of rubber plug 2 351 and rubber plug 1 21 are fixed, high-pressure liquid can be injected into the space between rubber plug 2 351 and rubber plug 1 21 through the injection pipe 31, and the pressure is increased until the hole wall ruptures, and the pressure change over time is recorded, and the rupture direction is observed with a mold or downhole television. At this time, the two pressure sensors 1 will transmit the measured pressure values, and the corresponding formula can be used to calculate the size and direction of the original principal stress based on the recorded rupture pressure, pump-off pressure and rupture direction to obtain the specific value of the multi-directional stress value.

[0046] After the numerical measurement is completed, it is necessary to stop energizing the electric heating plate 22, so that the rubber plug 21 begins to retract and the rubber plug 21 is released from its position. At this time, the motor 2 341 is started again, and the rotation direction of the motor 2 341 is controlled to be opposite to the first rotation direction, so that the connecting line 345 is recovered. In the process of recovering the connecting line 345, it is also necessary to start the motor 1 331, so that the reciprocating screw 332 can rotate under the action of the motor 1 331 and the cooperation of the rotating head 1 333. When the rod 332 rotates, it will drive the driving head 334 to reciprocate along the outer surface of the reciprocating screw 332. When the driving head 334 moves, it will bring the winding tube 335 together. At this time, the connecting wire 345 can be evenly wound on the outside of the wire coil 344 under the action of the winding tube 335. When the connecting wire 345 is retracted, the power to the electric heating ring 354 is canceled, and the rubber plug 2 351 also starts to retract. The retraction is canceled, and the position of the rubber plug 21 is canceled to retract the mechanical structure, which is more convenient.

[0047] It should be noted that the specific installation method, circuit connection method and control method of the pressure sensor 1, electric heating plate 22, motor 1 331, motor 2 341 and electric heating ring 354 in the present invention are all conventional designs and will not be elaborated in detail in the present invention.

[0048] Working principle: when it is necessary to measure the ground stress of the rock formation, first determine the positions of the rubber plug 2 351 and the rubber plug 1 21, then put the rubber plug 2 351 into the drilled hole, and energize the electric heating ring 354 to allow the electric heating ring 354 to release heat inside the rubber plug 2 351, so that the rubber plug 2 351 expands due to the heat and then gets stuck on the inner surface of the rock wall of the drilled hole, and then start the motor 2 341 to allow the rotating shaft 342 to rotate under the action of the motor 2 341 and the cooperation of the rotating head 2 343. When the rotating shaft 342 rotates, the wire drum 344 on its outer surface will also rotate with it. When the wire drum 344 rotates, the connecting wire 345 on its outer surface will be released. At this time, the connecting wire 345 will be drawn along the inner surface of the coiled tube 335. When released, it will slide down along the inner surface of the two outlets 362. Because the outer surface of the connecting line 345 is fixedly connected to the inner surface of the interface 24, when the connecting line 345 is released, the rubber plug 21 will slide down along the inner wall of the borehole under the action of its own gravity. In this way, the distance between the rubber plug 2 351 and the rubber plug 21 can be controlled by controlling the length of the connecting line 345 released, so as to achieve the purpose of measuring the ground stress of different borehole sections. When the position of the rubber plug 21 is lowered to the predetermined point, the action of the motor 2 341 is stopped, and the electric heating plate 22 is energized through the connecting line 345 to allow the electric heating plate 22 to start releasing heat, so that the rubber plug 21 begins to expand under the action of heat, so that the rubber plug 21 can also be tightly attached to the inner wall of the borehole.

[0049] When the positions of rubber plug 2 351 and rubber plug 1 21 are fixed, high-pressure liquid can be injected into the space between rubber plug 2 351 and rubber plug 1 21 through the injection pipe 31, and the pressure is increased until the hole wall ruptures, and the pressure change over time is recorded, and the rupture direction is observed with a mold or downhole television. At this time, the two pressure sensors 1 will transmit the measured pressure values, and the corresponding formula can be used to calculate the size and direction of the original principal stress based on the recorded rupture pressure, pump-off pressure and rupture direction to obtain the specific value of the multi-directional stress value.

[0050] When all the data required for the multi-directional geostress measurement are recorded, the electric heating plate 22 is powered off, so that the rubber plug 21 begins to retract and the rubber plug 21 is unstuck. At this time, the motor 2 341 is started again, and the rotation direction of the motor 2 341 is controlled to be opposite to the first rotation direction, so that the connecting line 345 is recovered. In the process of recovering the connecting line 345, the motor 1 331 needs to be started, so that the reciprocating screw 332 can rotate under the action of the motor 1 331 and the cooperation of the rotating head 1 333. When the reciprocating screw 332 rotates, it will drive the driving head 334 to reciprocate along the outer surface of the reciprocating screw 332. When the driving head 334 moves, it will bring the winding tube 335 together. At this time, the connecting wire 345 can be evenly wound on the outside of the wire coil 344 under the action of the winding tube 335. When the connecting wire 345 is retracted, the power to the electric heating ring 354 is canceled, and the rubber plug 21 also starts to retract. The retraction is canceled, the position of the rubber plug 21 is canceled, and then the mechanical structure is retracted.

[0051] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multi-directional ground stress adaptive adjustment mechanical structure, comprising two pressure sensors (1), characterized in that: The lower end of the pressure sensor (1) located on the lower side is fixedly connected to a lower blocking mechanism (2), and the upper end of the pressure sensor (1) located on the upper side is fixedly connected to an upper blocking mechanism (3).

2. A multi-directional ground stress adaptive adjustment mechanical structure according to claim 1, characterized in that: The lower blocking mechanism (2) comprises a rubber plug (21), the upper end of the rubber plug (21) being fixedly connected to the lower end of the pressure sensor (1) located at the lower side, the inner cavity of the rubber plug (21) being fixedly connected to an electric heating plate (22), the inner surface of the electric heating plate (22) being fixedly connected to a wiring tube (23), and the upper end of the wiring tube (23) being provided with an interface (24).

3. The multi-directional ground stress adaptive adjustment mechanical structure according to claim 1, characterized in that: The upper plugging mechanism (3) comprises an injection pipe (31), the outer surface of the injection pipe (31) is fixedly connected to a shell (32), the rear end of the shell (32) is fixedly connected to a reciprocating assembly (33), the rear end of the shell (32) is fixedly connected to an adjusting assembly (34), the lower end of the shell (32) is fixedly connected to an upper plugging assembly (35), and the interior of the upper plugging assembly (35) is fixedly connected to a positioning assembly (36).

4. The multi-directional ground stress adaptive adjustment mechanical structure according to claim 3 is characterized in that: The upper plugging component (35) comprises a second rubber plug (351), the lower end of the second rubber plug (351) being fixedly connected to the upper end of the pressure sensor (1) located on the upper side, the second rubber plug (351) being provided with a first positioning groove (352) at both the upper and lower ends, the second rubber plug (351) being provided with a second positioning groove (353) at both the upper and lower ends, the inner surfaces of the two second positioning grooves (353) being fixedly connected to the outer surface of the injection pipe (31), and the inner cavity of the second rubber plug (351) being fixedly connected to an electric heating ring (354).

5. The multi-directional ground stress adaptive adjustment mechanical structure according to claim 4, characterized in that: The positioning assembly (36) comprises a positioning tube (361), the upper and lower ends of the positioning tube (361) are provided with wire outlets (362), and the inner surfaces of the upper and lower ends of the positioning tube (361) are fixedly connected with sealing rings (363).

6. The multi-directional ground stress adaptive adjustment mechanical structure according to claim 5, characterized in that: The reciprocating assembly (33) comprises a motor 1 (331), the front end of the motor 1 (331) is fixedly connected to the rear end of the housing (32), the output end of the motor 1 (331) is fixedly connected to a reciprocating screw (332) via a coupling, the outer surface of the reciprocating screw (332) is slidably connected to a driving head (334), the right end of the driving head (334) is fixedly connected to a winding tube (335), the front end of the reciprocating screw (332) is rotatably connected to a rotating head 1 (333), and the front end of the rotating head 1 (333) is fixedly connected to the front wall of the inner cavity of the housing (32).

7. The multi-directional ground stress adaptive adjustment mechanical structure according to claim 6, characterized in that: The adjustment component (34) comprises a second motor (341), the front end of the second motor (341) is fixedly connected to the rear end of the housing (32), the output end of the second motor (341) is fixedly connected to a rotating shaft (342) via a coupling, the outer surface of the rotating shaft (342) is fixedly connected to a wire drum (344), the outer surface of the wire drum (344) is wound with a connecting wire (345), the front end of the rotating shaft (342) is rotatably connected to a second rotating head (343), and the front end of the second rotating head (343) is fixedly connected to the front wall of the inner cavity of the housing (32).

8. The multi-directional ground stress adaptive adjustment mechanical structure according to claim 5, characterized in that: The outer surface of the positioning tube (361) is fixedly connected to the inner surfaces of the two positioning grooves (352).

9. The multi-directional ground stress adaptive adjustment mechanical structure according to claim 7, characterized in that: The outer surface of the connection line (345) is slidably connected to the inner surfaces of the two line outlets (362), and the outer surface of the connection line (345) is slidably connected to the inner surfaces of the two sealing rings (363).

10. The multi-directional ground stress adaptive adjustment mechanical structure according to claim 7, characterized in that: The outer surface of the connecting wire (345) is fixedly connected to the inner surface of the interface (24), and the outer surface of the connecting wire (345) is slidably connected to the inner surface of the coiled tube (335).

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