Internal osmotic pressure-stress-deformation deep sensing device for surrounding rock with anchored cracks

Abstract

The utility model discloses an anchoring crack surrounding rock internal osmotic pressure-stress-deformation deep layer sensing device which comprises a plurality of hollow rod bodies, adjacent rod bodies are connected through a tensile stress sensor, through holes are formed in the side faces of the rod bodies, osmotic pressure monitoring assemblies communicated with the through holes are arranged in the rod bodies, and end axial force monitoring assemblies are arranged at the outer ends of the rod bodies. The data acquisition component is in communication connection with the tensile stress sensor, the osmotic pressure monitoring component and the end axial force monitoring component at the same time, and the data acquisition component is also in communication connection with the data processing component. The device can realize cooperative monitoring of internal and external transmission deformation and pore water pressure in the rock mass under the action of disturbance stress, and realizes comprehensive perception of the stability and safety of the rock mass.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering safety monitoring equipment, and more specifically to a deep-layer sensing device for internal seepage pressure-stress-deformation of anchored fractured surrounding rocks. Background Art

[0002] During the construction of underground rock projects such as highway tunnels, hydraulic tunnels and metal mines in water-rich geological areas such as tropical islands, problems such as the development of surrounding rock fissures, water-rich strata and shallow burial depth are generally faced. Especially after strong tropical storm precipitation, the rainstorm effect of groundwater is more significant. Therefore, monitoring of hydraulic penetration damage of weathered fissure surrounding rock has become an important aspect of island rock tunnel construction.

[0003] However, in the existing highway tunnel construction process, the stress and deformation of the surrounding rock are mainly monitored, and the permeability pressure of the surrounding rock of the island rock tunnel is not monitored. If the permeability pressure of the surrounding rock needs to be monitored in actual engineering construction, the method of burying pore water pressure sensors is generally adopted. This method uses stress, deformation and permeability as independent monitoring technical indicators, and cannot be combined as a whole for analysis to determine risks. Moreover, in the existing tunnel construction process, the strain of the anchor rod is analyzed by attaching strain gauges on the surface of the anchor rod. However, this method is not reliable because the strain gauges on the surface of the rod are easily damaged by extrusion or moisture, so the reliability is low. Therefore, how to comprehensively monitor and perceive the stability and safety of the anchored fractured rock mass with fracture water pressure in the special case of water-rich geology is an urgent problem to be solved. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a deep-layer sensing device for the internal seepage pressure-stress-deformation of anchored fractured surrounding rocks, which can realize the coordinated monitoring of the internal and external transmission deformation and the pore water pressure inside the rock mass under the action of disturbed stress, and realize the comprehensive perception of the stability and safety of the anchored fractured rock mass.

[0005] The utility model provides an anchored fractured surrounding rock internal osmotic pressure-stress-deformation deep sensing device, comprising a plurality of hollow rod bodies for inserting into the surrounding rock, adjacent rod bodies are connected by means of tensile stress sensors, and through holes are provided on the sides of the rod bodies, an osmotic pressure monitoring component connected to the through holes is provided in the rod bodies, an end axial force monitoring component is provided at the outer end of the rod body located outside the surrounding rock, and also comprises a data acquisition component that is simultaneously communicatively connected to the tensile stress sensor, the osmotic pressure monitoring component and the end axial force monitoring component to obtain tensile stress data, osmotic pressure data and end axial force data, and the data acquisition component is also communicatively connected to a data processing component.

[0006] Preferably, in the above-mentioned anchored fracture surrounding rock internal seepage pressure-stress-deformation deep sensing device, the through hole is opened in the outer periphery of the rod body which is buried the deepest.

[0007] Preferably, in the above-mentioned anchored fracture surrounding rock internal seepage pressure-stress-deformation deep sensing device, the distance between adjacent through holes ranges from 10 cm to 20 cm.

[0008] Preferably, in the above-mentioned anchored fracture surrounding rock internal permeability pressure-stress-deformation deep sensing device, the number of the through holes ranges from 10 to 20.

[0009] Preferably, in the above-mentioned anchored fracture surrounding rock internal osmotic pressure-stress-deformation deep sensing device, the osmotic pressure monitoring component includes an osmotic pressure sensor and a permeable stone arranged at the front end of the osmotic pressure sensor, and the permeable stone can contact the water that penetrates from the through hole.

[0010] Preferably, in the above-mentioned anchored fracture surrounding rock internal permeability pressure-stress-deformation deep sensing device, both ends of the tensile stress sensor have external threads, the end of the rod body used for connecting with the tensile stress sensor has an internal thread, and the tensile stress sensor and the rod body are connected by the cooperation of the external thread and the internal thread.

[0011] Preferably, in the above-mentioned anchored fracture surrounding rock internal seepage pressure-stress-deformation deep layer sensing device, the end axial force monitoring component includes:

[0012] An anchor tray is sleeved on the outer periphery of the rod body, and the anchor tray abuts against the outer surface of the surrounding rock;

[0013] A yield ring sleeved on the outer periphery of the rod body, the yield ring abutting against a side of the anchor tray away from the surrounding rock;

[0014] A deformable tooth piece sleeved on the outer periphery of the rod body, the deformable tooth piece abutting against a side of the yield ring away from the anchor tray;

[0015] An axial force sensor sleeved on the outer periphery of the rod body, the axial force sensor abutting against a side of the deformable tooth piece away from the yield ring;

[0016] A fixing nut is sleeved on the outer periphery of the rod body and fixed to the rod body, wherein the fixing nut abuts against a surface of the axial force sensor away from the deformable tooth piece.

[0017] Preferably, in the above-mentioned anchored fracture surrounding rock internal seepage pressure-stress-deformation deep sensing device, the outer peripheral portion of the deepest buried rod body close to the innermost end is provided with a plurality of transverse ribs used as grouting anchoring sections.

[0018] Preferably, in the above-mentioned anchored fracture surrounding rock internal seepage pressure-stress-deformation deep sensing device, the rod body is a steel rod body.

[0019] Preferably, in the above-mentioned anchored fractured surrounding rock internal osmotic pressure-stress-deformation deep sensing device, the data acquisition component and the tensile stress sensor, the osmotic pressure monitoring assembly and the end axial force monitoring assembly are all communicated with each other using sensor cables, and the sensor cable for connecting the tensile stress sensor and the osmotic pressure monitoring assembly extends from the internal space of the rod body to the outside of the surrounding rock and then is connected to the data acquisition component.

[0020] It can be seen from the above technical scheme that the above-mentioned anchored fractured surrounding rock internal osmotic pressure-stress-deformation deep sensing device provided by the utility model, since adjacent rod bodies are connected by means of tensile stress sensors, and through holes are opened on the sides of the rod bodies, an osmotic pressure monitoring component connected to the through holes is arranged in the rod body, and an end axial force monitoring component is arranged at the outer end of the rod body located outside the surrounding rock. Therefore, tensile stress data, osmotic pressure data and end axial force data can be obtained simultaneously. Since it also includes a data acquisition component, and the data acquisition component is also communicatively connected to the data processing component, the above-mentioned multiple information can be integrated. It can be seen that in this way, all-round information of the rod body inside the rock mass can be sensed, thereby realizing coordinated monitoring of internal and external transmission deformation and pore water pressure inside the rock mass under the action of disturbed stress, and realizing comprehensive perception of the stability and safety of the anchored fractured rock mass. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of an embodiment of a device for sensing deep permeability-stress-deformation inside anchored fractured surrounding rocks provided by the utility model. DETAILED DESCRIPTION

[0023] The core of the utility model is to provide a deep-layer sensing device for the internal seepage pressure-stress-deformation of anchored fractured surrounding rocks, which can realize the coordinated monitoring of the internal and external transmission deformation and the pore water pressure inside the rock mass under the action of disturbed stress, and realize the comprehensive perception of the stability and safety of the anchored fractured rock mass.

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The utility model provides an implementation example of a device for sensing the internal seepage pressure-stress-deformation of anchored fractured surrounding rocks. Figure 1 As shown, Figure 1 This is a schematic diagram of an embodiment of an anchored fractured surrounding rock internal osmotic pressure-stress-deformation deep layer sensing device provided by the utility model. The device may include a plurality of hollow rods 2 for inserting into the surrounding rock 1. Figure 1The dotted lines in the figure represent the joints and fissures inside the surrounding rock. The hollow rod body 2 can be transformed using a traditional anchor rod structure by hollowing out its interior, which can retain the function of the anchor rod. That is to say, after the hollow rod body 2 is extended into the surrounding rock, it can meet the reinforcement requirements of the fractured surrounding rock. The adjacent rod bodies 2 are connected by a tensile stress sensor 3. When the adjacent rod bodies 2 are driven to move in opposite directions due to deformation inside the surrounding rock during operation, tensile stress is generated between the two. The tensile stress can be sensed using the tensile stress sensor 3. How the tensile stress sensor 3 specifically monitors the tensile stress belongs to the prior art and will not be described here. Moreover, a tensile stress sensor 3 is arranged between each adjacent rod body 2, which realizes the axial force load monitoring function of multi-node perception, so that the magnitude of the tensile stress borne by the rod body 2 at different depths can be known in real time, so that the stress at different depths can be monitored. There is a global monitoring of the stress situation, so that the monitoring effect is better. The connection relationship between the tensile stress sensor 3 and the rod body 2 is not limited, as long as the two can be connected firmly enough, and a through hole 4 is opened on the side of the rod body 2, and an osmotic pressure monitoring component 5 connected to the through hole 4 is arranged in the rod body 2. This osmotic pressure monitoring component 5 can realize the monitoring of osmotic pressure. This is a prior art and will not be repeated here. In this way, the monitoring of the osmotic pressure inside the fractured rock mass can be realized. It should be noted that an increase in osmotic pressure will cause the fracture to be filled with water, causing the fracture to open and close, thereby causing deformation of the surrounding rock and increasing the risk of the surrounding rock. Therefore, here, by monitoring the osmotic pressure, more monitoring basis can be provided for the safety of the surrounding rock. Moreover, the outer end of the rod body 2 located outside the surrounding rock 1 is provided with an end axial force monitoring component 6. Specifically, a mechanical intelligent terminal sensing structure (Intelligent Terminal Sensing Structure) can be installed at the exposed end of the rod body 2. The terminal structure (ITS) realizes the deformation sensing function of the axial load of the rod body caused by the internal deformation of the surrounding rock and transmitted to the end of the rod body. It can be used to monitor the axial force and deformation on the outside of the surrounding rock 1. The monitoring of axial force and deformation is also an existing technology and will not be repeated here. When the osmotic pressure inside the surrounding rock increases or other factors cause the overall expansion of the surrounding rock, the axial force of the rod body 2 will increase, causing the rod body 2 to push out to the outside of the surrounding rock. At this time, the end axial force monitoring component 6 can be used to calculate the change of this axial force, and combined with the osmotic pressure monitoring parameters, relevant personnel can understand the safety risk of the surrounding rock at each moment. It also includes a data acquisition component 7 that is simultaneously connected to the tensile stress sensor 3, the osmotic pressure monitoring component 5 and the end axial force monitoring component 6 to obtain tensile stress data, osmotic pressure data and end axial force data. The data acquisition component 7 is also connected to the data processing component 8. It can be seen that the scheme uses this data acquisition component to realize the synchronous acquisition of the above three types of data, so as to provide a more comprehensive data basis for rock mass safety monitoring.By using the data processing component 8 in the deep sensing device for the internal osmotic pressure-stress-deformation of the anchored fractured surrounding rock, the deformation data can be analyzed according to the change law of the measured end axial force data. It should be noted here that this analysis method is also a prior art, and the stress position of the rod body where deformation occurs inside the fractured surrounding rock and the safety level of the anchored fractured surrounding rock can also be obtained according to the tensile stress data, the osmotic pressure data, the end axial force data and the deformation data. It can be seen that according to the obtained four parameters, a more sufficient basis can be provided for the overall monitoring and evaluation process. Moreover, this data processing component 8 can simultaneously analyze the data of multiple parts of multiple rod bodies, and can transmit the relevant analysis data to the display component to display these real-time analysis results to the relevant personnel, so that the relevant personnel can intuitively see at any time which part or parts are under greater stress and the size of the safety level. When the safety level of a certain part is dangerous, corresponding measures should be taken to avoid dangerous accidents. It can be seen that the adoption of this scheme can better prevent accidents before they happen, which is more conducive to the safety of anchored fractured surrounding rocks under island geological conditions, and has important value for the efficient construction and safe operation and maintenance monitoring of island rock tunnels or other underground projects in water-rich environments.

[0026] An example is given to illustrate the above analysis method as follows: the above tensile stress data T n and osmotic pressure data P p , the osmotic pressure data is obtained When , it indicates that the anchored fracture surrounding rock has been damaged. In the above formula, T n The unit is MPa, σ is the compressive strength of the fractured rock mass, the unit is MPa, τ is the shear strength of the fractured rock mass, the unit is MPa, c m is the cohesion of the complete rock mass, in MPa, φ m is the internal friction angle of the complete rock block, in degrees. Of course, the analysis method is not limited to this and is not limited here. Moreover, these analysis methods are existing and this application does not make any improvements to these analysis methods.

[0027] It can be seen from the above technical scheme that in the embodiment of the above-mentioned anchored fractured surrounding rock internal osmotic pressure-stress-deformation deep sensing device provided by the utility model, since adjacent rod bodies are connected by tensile stress sensors, and a through hole is opened on the side of the rod body, an osmotic pressure monitoring component connected to the through hole is arranged in the rod body, and an end axial force monitoring component is arranged at the outer end of the rod body located outside the surrounding rock, so that tensile stress data, osmotic pressure data and end axial force data can be obtained at the same time, and since it also includes a data acquisition component, the data acquisition component is also communicatively connected to the data processing component, and the data processing component is used to analyze the deformation data according to the change law of the measured end axial force data, and according to the tensile stress data, osmotic pressure data, end axial force data and deformation data, the stress position of the rod body where deformation occurs inside the fractured surrounding rock and the safety level of the anchored fractured surrounding rock are obtained. Therefore, it can be seen that the comprehensive information of the rod body can be obtained by combining these data, so that it can be seen that the above-mentioned three integrated monitoring devices are used at the same time, so that the coordinated monitoring of the internal and external transmission deformation and the pore water pressure inside the rock mass under the action of disturbed stress can be realized, and the stability and safety of the anchored fractured rock mass can be evaluated.

[0028] In a specific embodiment of the above-mentioned anchored fracture surrounding rock internal osmotic pressure-stress-deformation deep sensing device, the above-mentioned through hole 4 is opened on the outer periphery of the deepest buried rod body 2. It should be noted that, generally speaking, the deeper the position inside the surrounding rock, the more reference value the osmotic pressure at its location has. Therefore, it is preferred to open the through hole 4 on the outer periphery of the deepest buried rod body 2, so that water at the deepest position can pass through the through hole 4 and then be sensed by the osmotic pressure monitoring component. At this time, the osmotic pressure situation in the surrounding rock can be more accurately evaluated. Of course, it can also be set on the second deepest buried rod body 2 or other rod bodies according to actual needs. There is no restriction here, and the specific position on the rod body can also be adjusted.

[0029] Furthermore, the distance between adjacent through holes 4 can preferably be in the range of 10 cm to 20 cm. It should be noted that this distance can ensure that a sufficient amount of water enters the rod body 2 through the through holes to achieve effective osmotic pressure monitoring, and will not reduce the strength of the rod body 2, and will not affect its function of fastening the surrounding rock. If the through holes are too close, the rod body may be insufficiently strong at this position and break. Of course, this distance can also be adjusted according to actual needs, and is not limited here.

[0030] Furthermore, the number of the through holes can preferably range from 10 to 20. It should be noted that this number of through holes can ensure that sufficient water can be introduced into the rod body 2 and that the strength of the rod body 2 is high enough. Taking the through holes with a spacing of 10 cm as an example, the total length of the rock-entering part minus the 1-meter anchoring section is divided by the 10-cm spacing to obtain the number of through holes 4. Of course, this can be selected according to actual needs and is not limited here. In addition, the through holes can preferably be arranged at equal spacing or unequal spacing. The shape of the through holes can be circular, square or any other shape, which is not limited here.

[0031] Based on the above embodiments, further referring to Figure 1 The osmotic pressure monitoring assembly 5 may include an osmotic pressure sensor 51 and a permeable stone 52 disposed at the front end of the osmotic pressure sensor 51, and the permeable stone 52 may contact the water that penetrates from the through hole 4. Specifically, the polycrystalline silicon osmotic pressure sensor may be used but is not limited to the type, the tip of the polycrystalline silicon osmotic pressure sensor is a permeable stone, and the range is 0 to 1000 MPa.

[0032] In another specific embodiment of the above-mentioned anchored fracture surrounding rock internal osmotic pressure-stress-deformation deep layer sensing device, continue to refer to Figure 1 , both ends of the tensile stress sensor 3 may have external threads 31, and the end of the rod body 2 for connecting with the tensile stress sensor 2 may have internal threads (not shown in the figure), and the tensile stress sensor 3 and the rod body 2 may be connected by the cooperation of the external threads 31 and the internal threads. That is to say, in actual operation, one end of a tensile stress sensor 3 may be screwed into the rod body 2, and the two may be fastened together by the cooperation of the external threads and the internal threads, and then the other end of the tensile stress sensor 3 may be screwed into another rod body 2, and the tensile stress sensor 3 and the other rod body 2 may be fastened together by the cooperation of the external threads and the internal threads. In this way, when the two rod bodies 2 are in the surrounding rock and are subjected to external force, the rod body 2 located on the outside moves outward, and tensile stress is generated between the rod body 2 located on the inside, and the tensile stress sensor 3 can monitor this tensile stress. Moreover, a tensile stress sensor 3 is set between adjacent rod bodies 2, so that the stress conditions at different depths in the surrounding rock can be monitored at the same time, thereby providing more basis for the safety assessment of the surrounding rock. Of course, the connection between the tensile stress sensor 3 and the rod body 2 can also be achieved by welding, riveting or any other method that can achieve a fastened connection, as long as the connection strength is sufficient and will not be broken under high stress.

[0033] In another specific embodiment of the above-mentioned anchored fracture surrounding rock internal osmotic pressure-stress-deformation deep layer sensing device, continue to refer to Figure 1, the end axial force monitoring component 6 may specifically include:

[0034] An anchor tray 61 is sleeved on the outer periphery of the rod body 2, and the anchor tray 61 abuts against the outer surface of the surrounding rock 1;

[0035] A yield ring 62 is sleeved on the outer periphery of the rod body 2, and the yield ring 62 abuts against a side of the anchor tray 61 away from the surrounding rock 1;

[0036] A deformable tooth piece 63 sleeved on the outer periphery of the rod body 2, the deformable tooth piece 63 abuts against a side of the yield ring 62 away from the anchor tray 61;

[0037] An axial force sensor 64 is sleeved on the outer periphery of the rod body 2, and the axial force sensor 64 abuts against a side of the deformable tooth piece 63 away from the yield ring 62;

[0038] The fixing nut 65 is sleeved on the outer periphery of the rod body 2 and fixed to the rod body 2 . The fixing nut 65 abuts against a surface of the axial force sensor 64 away from the deformable tooth piece 63 .

[0039] In this case, when the deformed tooth piece 63 breaks, it indicates that stress and deformation transfer occurs inside the rock mass, and the internal and external transfer deformation can be calculated based on the change of the end axial force data and the tooth piece structure parameters. When the tensile stress data sensed by the tensile stress sensor 3 at each connection position of the rod body 2 increases, the fracture of the above-mentioned deformed tooth piece 63 at the end of the rod body 2 and the deformation of the yield ring 62 can be observed at this time, and the safety level of the anchored fracture surrounding rock can be determined accordingly. For example, when the tensile stress data of the tensile stress sensor increases, and the deformed tooth piece 63 at the end of the rod body 2 does not break, it indicates that the anchored fracture surrounding rock is stable and safe; when the tensile stress data of the tensile stress sensor increases, the first deformed tooth piece 63 at the end of the rod body 2 breaks, and the end axial force data undergoes a sudden change, it indicates that obvious deformation occurs inside the anchored fracture surrounding rock, thereby performing a level I warning of the anchored fracture surrounding rock, and so on, so that the safety level of the anchored fracture surrounding rock can be more accurately determined.

[0040] In a preferred embodiment of the above-mentioned anchored fracture surrounding rock internal osmotic pressure-stress-deformation deep layer sensing device, continue to refer to Figure 1, the outer peripheral part of the deepest buried rod body 2 near the innermost end can be provided with a plurality of transverse ribs 9 used as grouting anchoring sections. The number of the transverse ribs 9 can be 6 to 12, and the specific number can be selected according to needs. Such transverse ribs 9 are transverse reinforcing members used to enhance the anchoring effect, and can be members made of steel bars, steel plates or other materials. They can increase the tensile strength of the anchoring section, improve the overall stability of the anchoring, and help to disperse the concentrated stress on the anchoring section to a larger area, reducing local stress concentration. During the grouting process, the transverse ribs can limit the position of the anchor body to prevent it from shifting, and can serve as a support and fixing point during the grouting process. Moreover, the above-mentioned rod body 2 can preferably be a steel rod body. This steel material can ensure that the rod body is stronger, so the anchoring effect is better and the service life is longer. Of course, other high-strength materials can also be selected according to actual needs, which is not limited here.

[0041] In another preferred embodiment of the above-mentioned anchored fracture surrounding rock internal osmotic pressure-stress-deformation deep layer sensing device, continue to refer to Figure 1 , the data acquisition component 7 can communicate with the tensile stress sensor 3, the osmotic pressure monitoring component 5 and the end axial force monitoring component 6 by using the sensor cable 10, and the sensor cable 10 used to connect the tensile stress sensor 3 and the osmotic pressure monitoring component 5 is extended from the internal space of the rod body 2 to the outside of the surrounding rock 1 and then connected to the data acquisition component 7. It should be noted that the use of this cable for wired connection can ensure the effective transmission of the signal, and will not lose the signal or cause signal transmission errors during the transmission process. Moreover, this cable has sufficient strength and will not cause cable damage after deformation due to complex geological environments. Therefore, the service life can be longer. The parameters of the sensor cable used here can be as follows: four-core shielded wire with an anti-stretching mesh shielding layer, an outer diameter of 5mm, and a wire core cross-sectional area of ​​0.2mm². Of course, cables with other parameters can also be selected according to actual needs, which are not limited here.

[0042] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be 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 will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A deep sensing device for permeability pressure, stress and deformation inside anchored fractured surrounding rock, characterized in that: The invention comprises a plurality of hollow rod bodies for inserting into the surrounding rock, wherein adjacent rod bodies are connected by means of tensile stress sensors, and through holes are provided on the sides of the rod bodies, and an osmotic pressure monitoring component connected to the through holes is provided in the rod bodies, and an end axial force monitoring component is provided at the outer end of the rod body located outside the surrounding rock, and further comprises a data acquisition component which is communicatively connected with the tensile stress sensor, the osmotic pressure monitoring component and the end axial force monitoring component at the same time to obtain tensile stress data, osmotic pressure data and end axial force data, and the data acquisition component is also communicatively connected with a data processing component.

2. The device for sensing deep-layer osmotic pressure-stress-deformation inside anchored fractured surrounding rock according to claim 1, characterized in that: The through hole is arranged at the outer peripheral part of the rod body which is buried the deepest.

3. The device for sensing deep-layer osmotic pressure-stress-deformation inside anchored fractured surrounding rock according to claim 2 is characterized in that: The distance between adjacent through holes ranges from 10 cm to 20 cm.

4. The device for sensing deep-layer osmotic pressure-stress-deformation inside anchored fractured surrounding rock according to claim 3 is characterized in that: The number of the through holes ranges from 10 to 20.

5. The device for sensing deep-layer osmotic pressure, stress and deformation inside anchored fractured surrounding rock according to claim 4 is characterized in that: The osmotic pressure monitoring component includes an osmotic pressure sensor and a permeable stone arranged at the front end of the osmotic pressure sensor, and the permeable stone can contact the water that penetrates from the through hole.

6. The device for sensing deep-layer osmotic pressure-stress-deformation inside anchored fractured surrounding rock according to claim 1, characterized in that: Both ends of the tensile stress sensor have external threads, the end of the rod body used for connecting with the tensile stress sensor has internal threads, and the tensile stress sensor and the rod body are connected by the cooperation of the external threads and the internal threads.

7. The device for sensing the internal seepage pressure, stress and deformation of anchored fractured surrounding rocks according to claim 1, characterized in that: The end axial force monitoring component comprises: An anchor tray is sleeved on the outer periphery of the rod body, and the anchor tray abuts against the outer surface of the surrounding rock; A yield ring sleeved on the outer periphery of the rod body, the yield ring abutting against a side of the anchor tray away from the surrounding rock; A deformable tooth piece sleeved on the outer periphery of the rod body, the deformable tooth piece abutting against a side of the yield ring away from the anchor tray; An axial force sensor sleeved on the outer periphery of the rod body, the axial force sensor abutting against a side of the deformable tooth piece away from the yield ring; A fixing nut is sleeved on the outer periphery of the rod body and fixed to the rod body, wherein the fixing nut abuts against a surface of the axial force sensor away from the deformable tooth piece.

8. The device for sensing deep-layer osmotic pressure-stress-deformation inside anchored fractured surrounding rock according to claim 1, characterized in that: The outer peripheral portion of the deepest buried rod body close to the innermost end is provided with a plurality of transverse ribs used as grouting anchoring sections.

9. The device for sensing deep-layer osmotic pressure, stress and deformation inside anchored fractured surrounding rock according to claim 1, characterized in that: The rod body is a steel rod body.

10. The device for sensing deep-layer osmotic pressure-stress-deformation inside anchored fractured surrounding rock according to any one of claims 1 to 9, characterized in that: The data acquisition component is communicatively connected to the tensile stress sensor, the osmotic pressure monitoring component and the end axial force monitoring component by using a sensor cable, and the sensor cable for connecting the tensile stress sensor and the osmotic pressure monitoring component extends from the internal space of the rod body to the outside of the surrounding rock and is then connected to the data acquisition component.

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