A simulation test system for deformation and failure of surrounding rock in a cavern

Abstract

The present invention relates to the technical field of chamber surrounding rock simulation systems, and discloses a chamber surrounding rock deformation and failure simulation test system, including a test bench. A mechanism frame is fixed at the top end of the test bench, and tempered glass is fixed on the outside of the mechanism frame. One side of the tempered glass is hinged. The system further includes a pressing plate, which vertically moves within the tempered glass. Two hydraulic rods are symmetrically and fixedly connected to the top end of the pressing plate, and a cross bar is fixed to the top ends of the two hydraulic rods. The cross bar is fixed to the test bench. An experimental material is placed in the middle of the top end of the mechanism frame. By using two contact components that move synchronously with the simulation mechanism, the present invention ensures that when simulating the deformation and failure of the surrounding rock, stress change data in different vertical directions can be obtained synchronously, and stress change data at different distances can also be obtained, so that more reference data can be obtained when the equipment conducts simulation tests synchronously, providing protection for subsequent underground construction projects.

Description

Technical Field

[0001] The present invention relates to the technical field of chamber surrounding rock simulation systems, and in particular to a chamber surrounding rock deformation and failure simulation test system. Background Art

[0002] In recent years, more and more underground construction projects have led to increasingly prominent engineering geological problems. Since the surrounding rock is the rock surrounding the chamber, which can be artificially excavated or naturally formed, the physical and mechanical properties of the surrounding rock vary greatly, and the deformation and failure mechanisms are different, which will bring many potential hazards to underground engineering practice. Therefore, before formal construction, it is necessary to conduct a deformation and failure simulation test on the chamber surrounding rock to specifically study the deformation and failure mechanism of the corresponding chamber surrounding rock, so as to reduce the risks during excavation and construction.

[0003] In the Chinese patent with the publication number CN216955503U, a chamber surrounding rock deformation and failure simulation test device is disclosed, including an installation mechanism, a first loading mechanism, a second loading mechanism, and a third loading mechanism; the installation mechanism includes an installation table, a loading table, and a support rod, the first loading mechanism includes a first loading driving member, a first loading frame, a first force transmission rod, and a first pressure head, the loading table is provided with a chute extending in the X-axis direction, the second loading mechanism includes a second loading driving member, a second loading frame, a second force transmission rod, and a second pressure head, the loading table is also provided with a chute extending in the Y-axis direction, and the third loading mechanism includes a third loading driving member, a third loading frame, a third force transmission rod, and a third pressure head. The above-mentioned chamber surrounding rock deformation and failure simulation test device can study the relationship between the stress and strain of the surrounding rock in three different directions of XYZ, and study the deformation and failure mechanism of the surrounding rock.

[0004] Regarding the above related technologies, the inventor believes that there are the following defects:

[0005] When the above device adapts in the XY direction, it cannot perform adjustment tests for the Z direction (vertical direction), and can only perform displacement tests on a single plane. Therefore, the relationship between stress and strain obtained is not comprehensive and accurate enough. Secondly, the force transmission rod and the pressure head at Z can only perform vertical pressure and tests in a single direction. With the cooperation of the three, the data obtained by the entire device is relatively single, and the comparability is insufficient. The data obtained by the simulation is not comprehensive enough, which is not conducive to the development of later excavation and construction operations. Summary of the Invention

[0006] In order to solve the technical problem that the data obtained during the simulation test by the existing device in the background art is relatively single and not comprehensive enough, which is prone to potential hazards during later trimming, the present invention provides a chamber surrounding rock deformation and failure simulation test system.

[0007] The present invention is implemented by the following technical solutions: A simulation test system for the deformation and failure of surrounding rock in a cavern, including a test bench, on the top of which an institutional framework is fixed, and tempered glass is fixed on the outside of the institutional framework, and one side of the tempered glass is hinged;

[0008] It further includes a pressing plate, which vertically moves within the tempered glass, and two hydraulic rods are symmetrically and fixedly connected to the top of the pressing plate, and a cross bar is fixed to the top of the two hydraulic rods, and the cross bar is fixed to the test bench;

[0009] Experimental materials, which are placed in the middle of the top of the institutional framework;

[0010] A receiving mechanism, which is installed around the institutional framework and includes two contact components, and the two contact components are both symmetrically arranged;

[0011] A simulation mechanism, which is arranged at the bottom of the pressing plate and includes a circular plate. The top of the circular plate is in sliding contact with the pressing plate. A movable rod is rotatably connected to the bottom of the circular plate. Threaded protrusions are provided on the outer wall of the upper part of the movable rod, and spiral grooves are provided on the outer wall of the lower part of the movable rod. The threaded protrusions and the spiral grooves are arranged in the opposite direction to keep the contact components stable when increasing the simulation force.

[0012] Through the above technical solutions, the tempered glass is used to facilitate the real-time observation of the internal experimental situation, and the acting force during the internal experimental simulation of the surrounding rock deformation can be used to collect and summarize the data of stress and strain at different heights through two symmetrically arranged contact components; and when the simulation mechanism is used to apply pressure and simulate different positions of the experimental materials, it will synchronously drive the two contact components to move synchronously, so that the simulation mechanism can always be in the same vertical plane as the two symmetrically arranged contact components respectively, so as to collect the stress and strain generated by the deformation and failure of the surrounding rock. And as the position of the simulation mechanism changes, the distance from the contact components will also be different, so that the strain generated at different distances can be collected, so as to obtain more comprehensive experimental data on the simulation of the deformation and failure of the surrounding rock, provide reasonable data support for underground construction projects, and reduce construction hazards.

[0013] As a further improvement of the above solution, the simulation mechanism further includes a second limiting plate and a first limiting plate that are sequentially slidably connected to the movable rod from top to bottom. The middle parts of the second limiting plate and the first limiting plate are both provided with chute openings for adapting to the sliding of the movable rod, and the first limiting plate and the second limiting plate are perpendicular to each other. Contact components are connected to both sides of the first limiting plate and the second limiting plate for collecting and comparing simulation experiment data.

[0014] Through the above technical solutions, as the movable rod moves, it can drive the contact components on both sides to move adaptively under the sliding of the second limiting plate and the first limiting plate, and maintain them in a relatively vertical section.

[0015] As a further improvement of the above solution, a vertical groove is provided on the outer wall of the lower part of the movable rod. The vertical groove communicates with the bottom end of the spiral groove. A round block is slidably connected in the vertical groove and the spiral groove. A first ring is fixedly connected to the outside of the round block. A first moving block is fixedly connected to the bottom end of the first ring. A sleeve is symmetrically and fixedly connected to the top end of the first moving block. A pressure sensor is provided at the bottom of the movable rod. A cylinder is built in the first moving block for driving the first moving block to displace in a single horizontal direction.

[0016] As a further improvement of the above solution, a horizontal transverse groove is provided on the top of the first limiting plate. A horizontal slider is horizontally slidably connected in the horizontal transverse groove. A second ring is fixedly connected to the top end of the horizontal slider. A second spring is elastically connected between the second ring and the round plate. The second spring is sleeved outside the thread protrusion. A thread groove is provided on the inner wall of the second ring and can be threadedly connected with the thread protrusion. The aperture of the second ring is larger than the cross-sectional diameter of the movable rod, so as not to affect the normal downward sliding of the movable rod.

[0017] As a further improvement of the above solution, the receiving mechanism includes slide bars uniformly arranged around the mechanism frame. One group of slide bars is symmetrically arranged at the top end of the mechanism frame and is horizontally slidably connected with a second moving block. Cylinders are provided in both of the second moving blocks for displacing in a single horizontal direction. Guide rods are fixedly connected to the middle parts of both of the second moving blocks. The outer wall of the guide rod is horizontally slidable with the bottom end of the first moving block to realize the specified movement of the first moving block at the top of the mechanism frame.

[0018] Through the above technical solution, the movable rod can push the pressing plate through the hydraulic rod to realize the downward sliding of the round plate, and the pressure sensor is used to collect and summarize the real-time pressure data and send it to the terminal. When the round plate slides down, it can realize its own rotation under the sliding of the spiral groove and the round block. As the movable rod descends, the thread protrusion can be threadedly connected with the inner wall of the second ring. Since the directions of the spiral groove and the thread protrusion are opposite, it is ensured that as the movable rod descends, the thread protrusion can be threadedly connected with the second ring so that the second ring is always at the same vertical height, avoiding continuous downward pressing on the contact components on both sides, and only making the contact components stably contact the experimental material.

[0019] As a further improvement of the above solution, the contact component includes two groups of slide plates. The two groups of slide plates can slide horizontally relative to the slide bars. Vertical grooves are provided at the top ends of the two groups of slide plates. Vertical sliders are slidably connected in the vertical grooves. Oblique plates are fixedly connected to the outside of the two groups of vertical sliders. Oblique groove openings are provided at the bottom ends of the two groups of oblique plates.

[0020] As a further improvement of the above solution, sliding rods are slidably connected in both groups of the inclined notches, and outer plates are fixedly connected to the bottom ends of both groups of sliding rods. A plurality of contact rods are evenly and fixedly connected to the inner sides of the outer plates. All the plurality of contact rods are horizontally slidably connected to the sliding plate. Sliding holes are provided at the sliding parts of the sliding plate and the contact rods.

[0021] As a further improvement of the above solution, a plurality of first springs are elastically connected between the sliding plate and the outer plate. The plurality of first springs are sleeved on the outer sides of the contact rods to drive the two outer plates to displace inwards synchronously to contact and abut against the experimental material. Pressure sensors are provided at the contact rods.

[0022] Through the above technical solution, when the first limiting plate and the second limiting plate vertically descend, they can synchronously drive the inclined plates on both sides to push the outer plates to slide inwards until they stably contact the outer wall of the experimental material. The first limiting plate can always be in a sliding abutting state with the second limiting plate under the action of the plurality of first springs in the two contact assemblies connected thereto.

[0023] As a further improvement of the above solution, the tops of the two vertical sliders are fixedly connected to the two ends of the first limiting plate and the second limiting plate respectively to synchronously drive the operation of the two contact assemblies.

[0024] As a further improvement of the above solution, the inner sides of the two sliding plates are fixedly connected to the outer sides of the second moving block and the guide rod respectively to synchronously perform horizontal displacement, ensuring that the simulated pressure application points and the two contact assemblies are in different vertical planes, and enabling the collection of stress and strain data at different position spacings.

[0025] Through the above technical solution, the data collection will be more comparable, so that different data can be obtained at different pressure application positions and intensities, and more-dimensional data on the deformation and failure of the surrounding rock can be obtained.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] (1) The present invention uses two contact assemblies that move synchronously with the simulation mechanism, ensuring that when simulating the deformation and failure of the surrounding rock, stress change data in different vertical directions can be obtained synchronously, and stress change data at different distances can also be obtained. Thus, when the device performs simulation tests synchronously, more reference data can be obtained, which can escort the later underground construction project.

[0028] (2) The present invention utilizes the reverse setting of the spiral groove and the thread protrusion to ensure that during the simulation test, two sets of contact components can be synchronously driven to keep the contact distance with the experimental material unchanged, and the vertical height of the second ring remains unchanged, ensuring that only the force change in the vertical direction can be achieved; and after each single simulation test, it can return to its original position under the action of the second spring, and the first limiting plate and the second limiting plate can slide and abut against each other under the action of multiple first springs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 FIG. 1 is a schematic diagram of the overall structure of a simulation test system for the deformation and failure of surrounding rock in a cavern provided in Embodiment 1 of the present invention;

[0030] Figure 2 FIG. 2 is a schematic diagram of the structure of the receiving mechanism and the simulation mechanism of the present invention;

[0031] Figure 3 FIG. 3 is a schematic diagram of the top view structure of the present invention; Figure 2 FIG. 4 is a schematic diagram of the enlarged structure at position a in the present invention;

[0032] Figure 4 FIG. 5 is a schematic diagram of the enlarged structure at position b in the present invention; Figure 2 FIG. 6 is a schematic diagram of the enlarged structure at position c in the present invention.

[0033] Figure 5 FIG. 7 is a schematic diagram of the enlarged structure at position b in the present invention; Figure 2 FIG. 8 is a schematic diagram of the enlarged structure at position c in the present invention.

[0034] Figure 6 FIG. 9 is a schematic diagram of the enlarged structure at position c in the present invention. Figure 2 FIG. 10 is a schematic diagram of the enlarged structure at position c in the present invention.

[0035] MAIN SYMBOL DESCRIPTION:

[0036] 1. Test bench; 2. Mechanism frame; 3. Tempered glass; 4. Pressing plate; 5. Hydraulic rod; 6. Experimental material; 7. Slide bar; 8. Slide plate; 9. Contact rod; 10. Outer plate; 11. First spring; 12. Slide rod; 13. Inclined plate; 14. Vertical slider; 15. Guide rod; 16. Sleeve; 17. First moving block; 18. Second moving block; 19. First ring; 20. Round block; 21. Movable rod; 22. Vertical groove; 23. Spiral groove; 24. Round plate; 25. Thread protrusion; 26. Second ring; 27. Second spring; 28. Horizontal slider; 29. First limiting plate; 30. Horizontal transverse groove; 31. Second limiting plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] Next, with reference to the drawings and the specific embodiments, the present invention will be further described. It should be noted that, on the premise of no conflict, any combination of the following described embodiments or technical features can form a new embodiment.

[0038] Embodiment 1:

[0039] Please combine with Figures 1 - 5 For a simulation test system of the deformation and failure of the surrounding rock of a cavern in this embodiment, it includes a test bench 1. A mechanism frame 2 is fixed at the top of the test bench 1, and tempered glass 3 is fixed outside the mechanism frame 2. One side of the tempered glass 3 is hinged;

[0040] It further includes a pressing plate 4. The pressing plate 4 is vertically movable in the tempered glass 3, and two hydraulic rods 5 are symmetrically and fixedly connected to the top of the pressing plate 4. A cross bar is fixed at the top of the two hydraulic rods 5, and the cross bar is fixed to the test bench 1;

[0041] An experimental material 6 is placed in the middle of the top of the mechanism frame 2;

[0042] A receiving mechanism is installed around the mechanism frame 2, including two contact components, and the two contact components are both symmetrically arranged;

[0043] A simulation mechanism is arranged at the bottom of the pressing plate 4, including a circular plate 24. The top of the circular plate 24 is in sliding contact with the pressing plate 4. A movable rod 21 is rotatably connected to the bottom of the circular plate 24. Threaded protrusions 25 are arranged on the outer wall of the upper part of the movable rod 21, and spiral grooves 23 are formed on the outer wall of the lower part of the movable rod 21. The threaded protrusions 25 and the spiral grooves 23 are arranged in the opposite direction to keep the contact components stable when increasing the simulation force.

[0044] The simulation mechanism further includes a second limiting plate 31 and a first limiting plate 29 that are slidably connected to the movable rod 21 from top to bottom in sequence. Chute openings are formed in the middle of the second limiting plate 31 and the first limiting plate 29 to adapt to the sliding of the movable rod 21. The first limiting plate 29 and the second limiting plate 31 are perpendicularly arranged, and contact components are connected to both sides of the first limiting plate 29 and the second limiting plate 31 to collect and compare the simulation experiment data.

[0045] A vertical groove 22 is formed on the outer wall of the lower part of the movable rod 21. The vertical groove 22 communicates with the bottom end of the spiral groove 23. A circular block 20 is slidably connected in the vertical groove 22 and the spiral groove 23. A first ring 19 is fixedly connected to the outside of the circular block 20. A first moving block 17 is fixedly connected to the bottom end of the first ring 19. Two sleeves 16 are symmetrically and fixedly connected to the top of the first moving block 17. A pressure sensor is arranged at the bottom of the movable rod 21. A cylinder is arranged inside the first moving block 17 to drive the first moving block 17 to displace in a single horizontal direction.

[0046] A horizontal transverse groove 30 is provided at the top of the first limiting plate 29. A horizontal slider 28 is horizontally slidably connected in the horizontal transverse groove 30. The top end of the horizontal slider 28 is fixedly connected with a second ring 26. A second spring 27 is elastically connected between the second ring 26 and the circular plate 24. The second spring 27 is sleeved outside the threaded protrusion 25. Threaded grooves are provided on the inner wall of the second ring 26 and can be threadedly connected with the threaded protrusion 25. The aperture of the second ring 26 is larger than the cross-sectional diameter of the movable rod 21, which does not affect the normal downward sliding of the movable rod 21.

[0047] The implementation principle of a simulation test system for the deformation and failure of the surrounding rock of a cavern in the embodiment of the present application is as follows:

[0048] By using the cylinders at the second moving block 18 and the first moving block 17, the first moving block 17 drives the movable rod 21 to move to the position where the deformation and failure of the surrounding rock need to be simulated. Then, the hydraulic rod 5 can be started to push the pressing plate 4, and under the sliding contact between the pressing plate 4 and the circular plate 24, the movable rod 21 is pushed to perform a vertical displacement. When the movable rod 21 performs a vertical downward displacement, it will enter the spiral groove 23 under the vertical sliding guidance of the circular block 20 and the vertical groove 22, and drive the movable rod 21 to rotate and descend. At the same time, the threaded protrusion 25 will be threadedly connected with the inner wall of the second ring 26, so that when the movable rod 21 is vertically displaced and pressed, the second ring 26 will remain relatively unchanged in the vertical position under the threaded connection of the threaded protrusion 25; when a single simulation test is completed, the hydraulic rod 5 is driven to drive the pressing plate 4 to return to its original position. At this time, the circular plate 24 will pull the movable rod 21 rotatably connected thereto to return to its original position under the elasticity of the second spring 27, and collect the data at the pressure sensor and send it to the terminal for analysis.

[0049] Embodiment 2:

[0050] Combined with Figures 1 - 3 and Figure 6 On the basis of Embodiment 1, the further improvement of this embodiment lies in:

[0051] The receiving mechanism includes slide bars 7 uniformly arranged around the mechanism frame 2. One group of slide bars 7 is symmetrically arranged at the top of the mechanism frame 2 and is horizontally slidably connected with a second moving block 18. Cylinders are arranged in both second moving blocks 18 for performing a single horizontal displacement. Guide rods 15 are fixedly connected to the middle of both second moving blocks 18, and the outer wall of the guide rods 15 is horizontally slidable with the bottom end of the first moving block 17 to realize the designated movement of the first moving block 17 at the top of the mechanism frame 2.

[0052] The contact assembly includes two slide plates 8. The two slide plates 8 can slide horizontally relative to the slide bars 7. Vertical grooves are provided at the top ends of the two slide plates 8, and vertical sliders 14 are slidably connected in the vertical grooves. Inclined plates 13 are fixedly connected to the outside of the two vertical sliders 14, and inclined slot openings are provided at the bottom ends of the two inclined plates 13.

[0053] Two sliding rods 12 are slidably connected in both groups of inclined slots, and outer plates 10 are fixedly connected to the bottom ends of the two groups of sliding rods 12. A plurality of contact rods 9 are evenly and fixedly connected to the inner sides of the outer plates 10. The plurality of contact rods 9 are all horizontally slidably connected to the sliding plate 8. Sliding holes are provided at the sliding parts of the sliding plate 8 and the contact rods 9.

[0054] A plurality of first springs 11 are elastically connected between the sliding plate 8 and the outer plate 10. The plurality of first springs 11 are all sleeved on the outer sides of the contact rods 9 to drive the two outer plates 10 to displace inwards synchronously to contact and abut against the experimental material 6. Pressure sensors are provided at the contact rods 9.

[0055] The tops of the two vertical sliders 14 are fixedly connected to the two ends of the first limiting plate 29 and the second limiting plate 31 respectively to synchronously drive the operation of the two contact assemblies.

[0056] The inner sides of the two sliding plates 8 are fixedly connected to the outer sides of the second moving block 18 and the guide rod 15 respectively to synchronously perform horizontal displacement, ensuring that the simulated pressure application points and the two contact assemblies are in different vertical planes, and enabling the collection of stress and strain data at different position spacings.

[0057] The implementation principle of a simulation test system for the deformation and failure of a cavern surrounding rock in an embodiment of the present application is as follows:

[0058] When the pressing plate 4 is pressed down, in the early stage, under the push of the second spring 27, the first limiting plate 29 and the second limiting plate 31 will slide vertically downwards, thereby pressing down the two vertical sliders 14 on both sides. Under the sliding contact between the vertical sliders 14 and the inclined plates 13, the two symmetrically arranged outer plates 10 are synchronously slid inwards, and a plurality of contact rods 9 are pushed to abut against the outer wall of the experimental material 6; when the pressing plate 4 continues to be pressed down, due to the simultaneous resistance of the plurality of first springs 11 and the second spring 27, and the spiral groove 23 is slidably connected to the round block 20, and the thread protrusion 25 is also threadedly connected to the inner wall of the second ring 26, thus under the threaded connection between the thread protrusion 25 and the second ring 26, it is ensured that the second ring 26 will not undergo vertical displacement changes until a single simulation test is completed. After the round plate 24 loses pressure, it can return under the cooperation of a plurality of springs.

[0059] The above implementation manners are only the preferred implementation manners of the present invention and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention belong to the protection scope required by the present invention.

Claims

1. A simulation test system for the deformation and failure of the surrounding rock of a cavern, comprising: A test bench, with a mechanism frame fixed at the top of the test bench, and tempered glass fixed outside the mechanism frame, and one side of the tempered glass is hinged; Characterized in that it further comprises: A pressing plate, which vertically moves in the tempered glass, and two groups of hydraulic rods are symmetrically fixedly connected to the top of the pressing plate, and a cross bar is fixed at the top of the two groups of hydraulic rods, and the cross bar is fixed to the test bench; Experimental materials, which are placed in the middle of the top of the mechanism frame; A receiving mechanism, which is installed around the mechanism frame and includes two groups of contact components, and the two groups of contact components are both symmetrically arranged. The receiving mechanism includes slide bars evenly arranged around the mechanism frame, and one group of slide bars is symmetrically arranged at the top of the mechanism frame and is horizontally slidably connected to a second moving block. Cylinders are arranged in the two second moving blocks for performing single horizontal displacement, and guide rods are fixedly connected to the middle of the two second moving blocks, and the outer wall of the guide rod is horizontally slidable with the bottom end of the first moving block to enable the first moving block to move at a specified position on the top of the mechanism frame; A simulation mechanism, which is arranged at the bottom of the pressing plate and includes a circular plate. The top of the circular plate is in sliding contact with the pressing plate. A movable rod is rotatably connected to the bottom of the circular plate. Threaded protrusions are arranged on the outer wall of the upper part of the movable rod, and spiral grooves are opened on the outer wall of the lower part of the movable rod. The threaded protrusions and the spiral grooves are arranged in the opposite direction to keep the contact components stable when increasing the simulation force.

2. The simulation test system for deformation and failure of chamber surrounding rock according to claim 1, characterized in that The simulation mechanism further includes a second limiting plate and a first limiting plate that are slidably connected to the movable rod from top to bottom in sequence. Chute openings are opened in the middle of the second limiting plate and the first limiting plate to adapt to the sliding of the movable rod, and the first limiting plate and the second limiting plate are perpendicular to each other. Contact components are connected to both sides of the first limiting plate and the second limiting plate for collecting and comparing simulation experiment data.

3. The simulation test system for deformation and failure of chamber surrounding rock according to claim 2, wherein A vertical groove is opened on the outer wall of the lower part of the movable rod, and the vertical groove communicates with the bottom end of the spiral groove. A circular block is slidably connected in the vertical groove and the spiral groove. A first ring is fixedly connected to the outside of the circular block. A first moving block is fixedly connected to the bottom end of the first ring. Two sleeves are symmetrically fixedly connected to the top of the first moving block. A pressure sensor is arranged at the bottom of the movable rod. A cylinder is arranged inside the first moving block for driving the first moving block to perform single horizontal displacement.

4. A simulation test system for deformation and failure of chamber surrounding rock according to claim 2, characterized in that A horizontal transverse groove is opened at the top of the first limiting plate, and a horizontal slider is horizontally slidably connected in the horizontal transverse groove. A second ring is fixedly connected to the top of the horizontal slider. A second spring is elastically connected between the second ring and the circular plate and is sleeved outside the threaded protrusion. A threaded groove is opened on the inner wall of the second ring and is threadedly connected to the threaded protrusion. The aperture of the second ring is larger than the cross-sectional diameter of the movable rod.

5. The simulation test system for deformation and failure of chamber surrounding rock according to claim 2, characterized in that, The contact component includes two groups of slide plates, and the two groups of slide plates slide horizontally relative to the slide bars. Vertical grooves are opened at the top of the two groups of slide plates, and vertical sliders are slidably connected in the vertical grooves. Two inclined plates are fixedly connected to the outside of the two vertical sliders, and inclined groove openings are opened at the bottom of the two inclined plates.

6. The simulation test system for deformation and failure of chamber surrounding rock according to claim 5, characterized in that Two sets of slide bars are slidably connected in the two sets of inclined notches, and the bottom ends of the two sets of slide bars are fixedly connected with outer plates, and a plurality of contact bars are uniformly fixedly connected to the inner sides of the outer plates. The plurality of contact bars are all horizontally slidably connected with a slide plate, and slide holes are provided at the sliding positions of the slide plate and the contact bars.

7. The simulation test system for deformation and failure of chamber surrounding rock according to claim 6, characterized in that, A plurality of first springs are elastically connected between the slide plate and the outer plates. The plurality of first springs are all sleeved on the outer sides of the contact bars to drive the two outer plates to displace inwards synchronously to contact and abut against the experimental materials. Pressure sensors are provided at the contact bars.

8. The simulation test system for deformation and failure of chamber surrounding rock according to claim 5, characterized in that The top parts of the two sets of vertical sliders are respectively fixedly connected with the two ends of a first limiting plate and a second limiting plate to synchronously drive the operation of the two contact assemblies.

9. The simulation test system for deformation and failure of chamber surrounding rock according to claim 7, characterized in that, The inner sides of the two sets of slide plates are respectively fixedly connected with the outer sides of a second moving block and a guiding rod to synchronously perform horizontal displacement, ensuring that the simulated pressure application points and the two contact assemblies are in different vertical planes for collecting stress and strain data at different position intervals.

Images