Dynamic water grouting plugging experiment device for simulating three-dimensional rock mass fracture

Abstract

The invention discloses a flowing water grouting plugging experiment device for simulating three-dimensional rock mass fractures, and belongs to the field of mining simulation experiment devices. The device comprises a supporting frame and an observation plate set fixed to the supporting frame, the observation plate set comprises a first plate body, a second plate body and a third plate body which are perpendicular to one another, and every two of the first plate body, the second plate body and the third plate body form a cross-shaped plate body structure; an accommodating cavity is formed among the adjacent first plate body, second plate body and third plate body; grouting holes are formed in one or more of the first plate body, the second plate body and the third plate body; the water injection baffle plate is connected with the observation plate group and is connected with a water supply system so as to inject water into the accommodating cavity; and the water collecting baffle plate is connected with the observation plate group and is connected with a water return system so as to discharge the grouting water in the accommodating cavity. According to the invention, the grouting plugging effect analysis under the three-dimensional condition can be realized, and the research on the diffusion form and rule of the flowing water grouting slurry can be realized.

Description

Technical Field

[0001] This invention relates to the field of mining simulation experimental devices, and in particular to an experimental device and method for simulating dynamic water grouting and sealing of three-dimensional rock mass fissures. Background Technology

[0002] Extensive engineering practice has shown that the instability and failure of rock mass engineering is related to the expansion and penetration of internal joints and fissures. Grouting, as an economical and effective technology for strengthening soil and rock structures, has been widely used in underground engineering projects such as mines and tunnels. The flow of grout driven by pressure within fissures in dynamic water-bearing rock masses is a complex process, typically involving multiple factors such as the pressure field, seepage field, their coupling, and the expansion path. In actual grouting projects, the grout is injected into the fissure rock mass, making it difficult to directly observe the flow and distribution of the grout within the fissures. This results in the inherent concealment and uncertainty of grouting projects. In-situ experiments are difficult to obtain the aforementioned parameters and are costly. Therefore, grouting simulation experiments are needed to study the flow and sealing patterns of grout within rock mass fissures.

[0003] Currently, the simulation of rock mass fractures in rock mass grouting experimental devices typically uses a two-dimensional structure, which places the fractures within a horizontally arranged plate. This results in a significant discrepancy between the experimental simulation effect and the actual condition. Summary of the Invention

[0004] The technical problem to be solved by this invention is that the existing rock mass fracture grouting simulation experimental device differs greatly from the actual situation. To this end, this invention proposes a dynamic water grouting sealing experimental device and method for simulating three-dimensional rock mass fractures.

[0005] To address the aforementioned technical problems, the present invention provides the following technical solution:

[0006] An experimental device for simulating three-dimensional rock mass fissures through dynamic water grouting and sealing includes: a support frame and an observation plate assembly fixed to the support frame. The observation plate assembly includes a first plate, a second plate, and a third plate arranged perpendicularly to each other. Each pair of the first, second, and third plates forms a cross-shaped plate structure, and a cavity is formed between adjacent first, second, and third plates. Grouting holes are provided on one or more of the first, second, and third plates. A water injection baffle connected to the observation plate assembly is connected to a water supply system to inject water into the cavity. A water collection baffle connected to the observation plate assembly is connected to a return water system to discharge the grouting water from the cavity.

[0007] In one specific embodiment of the present invention, the water injection baffle and the water collection baffle are cross-shaped plates. The water injection baffle has a cross-shaped water injection cavity on the side facing the cavity, and a water injection hole is provided in the central area of ​​the side of the water injection baffle away from the cavity, and the water injection hole communicates with the water injection cavity. The water collection baffle has a cross-shaped water collection cavity on the side facing the cavity, and a water collection hole is provided in the central area of ​​the side of the water collection baffle away from the cavity, and the water collection hole communicates with the water collection cavity.

[0008] In one specific embodiment of the present invention, the water injection baffle and the water collection baffle are respectively connected to the two end faces of the cross-shaped plate body formed by the first plate body and the second plate body; the water injection baffle is provided with at least one stepped surface on the inner wall of the water injection cavity, and the water collection baffle is provided with at least one stepped surface on the inner wall of the water collection cavity to match the cavity width of the cross-shaped plate body.

[0009] In one specific embodiment of the present invention, the third plate is located between the water injection baffle and the water collection baffle, the distance between the third plate and the water injection baffle is less than the distance between the third plate and the water collection baffle, the grouting hole is located on the second plate, and the grouting hole is set close to the first plate and the third plate.

[0010] In one specific embodiment of the present invention, an auxiliary baffle is further included. The auxiliary baffle is a cross-shaped plate body, which is used to connect with the cross-shaped plate body formed by the first plate body and the third plate body and the cross-shaped plate body formed by the second plate body and the third plate body to seal the cavity.

[0011] In one specific embodiment of the present invention, a pad is further included. The pad cooperates with the first plate, the second plate, and the third plate to form the cavity. The pad is located in the intersection area between any two of the first plate, the second plate, and the third plate, or in the intersection area between the three plates.

[0012] In one specific embodiment of the present invention, a simulated rock layer constructed of cast or 3D printed rock mass is provided inside the cavity, and a sensor group is arranged in the simulated rock layer, the sensor group including one or more of pressure sensors, seepage pressure sensors, and flow sensors.

[0013] In one specific embodiment of the present invention, a pressure application system for applying pressure to simulated rock formations is also included. The pressure application system includes a hydraulic cylinder fixed to a support frame, and the output end of the hydraulic cylinder acts on the observation plate assembly.

[0014] In one specific embodiment of the present invention, the grouting hole is connected to a grouting sealing system, and the grouting sealing system includes a grouting device and a grouting pressure detection device.

[0015] In one specific embodiment of the present invention, a control system and a data acquisition and monitoring system are also included. The control system is used to control one or more of the water supply system, the grouting and sealing system, and the pressure application system to realize automatic real-time control and loading of mine pressure, dynamic water pressure, and fracture grouting. The data acquisition and monitoring system is used to collect one or more parameters of dynamic water flow velocity, temperature, seepage pressure, grout pressure, and flow rate.

[0016] The technical solution of the present invention has the following technical effects compared with the prior art:

[0017] The experimental device for simulating three-dimensional rock mass fissures using dynamic water grouting provided by this invention comprises three mutually perpendicular plates forming an observation plate group to simulate three-dimensional rock mass fissures. Grouting holes are installed on the observation plate group to simulate grouting. The observation plate group is also connected to a water injection baffle and a water collection baffle to inject and drain water from the cavity. This allows for analysis of the grouting sealing effect under three-dimensional conditions and research on the diffusion morphology and laws of dynamic water grout. Compared to two-dimensional methods, this approach is more consistent with engineering practice and allows for direct quantitative observation of the sealing effect. It effectively simulates actual rock mass fissures of varying degrees and dynamic water conditions under different pressures. It features a high degree of mechanization, simple operation, and can obtain curves showing the relationship between diffusion performance and parameters such as grouting pressure and water pressure for sealing effect analysis. Attached Figure Description

[0018] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which will help to understand the purpose and advantages of the present invention, wherein:

[0019] Figure 1 This is a schematic diagram of the experimental apparatus used for simulating three-dimensional cracks in a plate shape in Embodiment 1 of the present invention;

[0020] Figure 2 This is a schematic diagram of the experimental apparatus used for simulating three-dimensional cracks in a plate shape in Embodiment 2 of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the simulated plate-shaped three-dimensional crack portion in the experimental apparatus of Embodiment 1 of the present invention;

[0022] Figure 4 These are schematic diagrams of two structures of the pad in the experimental apparatus of Embodiment 1 of the present invention;

[0023] Figure 5 This is a schematic diagram of the water injection baffle in the experimental apparatus of Embodiment 1 of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the simulated coal and rock fracture part in the experimental device of Embodiment 1 of the present invention. Detailed Implementation

[0025] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] like Figure 1 , Figure 2 The diagram shows an experimental device for simulating three-dimensional rock mass fractures using dynamic water grouting (hereinafter referred to as the experimental device), used to simulate plate-shaped three-dimensional fractures and coal-rock fractures. The following two embodiments illustrate the specific structure of this experimental device for simulating plate-shaped three-dimensional fractures and coal-rock fractures.

[0030] Example 1

[0031] The experimental setup in this embodiment is used for simulating three-dimensional cracks in a plate. For example... Figure 1 , Figure 3As shown, the experimental apparatus includes a support frame 100 and an observation plate group 20 fixed to the support frame 100. The observation plate group 20 includes a first plate 21, a second plate 22, and a third plate 23 perpendicular to each other. Specifically, eight first plates 21, eight second plates 22, and eight third plates 23 are respectively arranged. Each pair of the first plates 21, two plates 22, and three plates 23 forms a cross-shaped plate structure, and cavities are formed between adjacent first plates 21, two plates 22, and three plates 23. For example, four first plates 21 and four second plates 22 form a cross-shaped plate with cavities, and four of the first plates 21 and four of the second plates 22 form a cross-shaped plate with cavities. The first plate 21 and the four third plates 23 form a cross-shaped plate with a cavity, and the four second plates 22 and the four third plates 23 form a cross-shaped plate with a cavity; one or more of the first plate 21, the second plate 22 and the third plate 23 are provided with grouting holes, which are connected to the grouting sealing system 60; the experimental device also includes a water injection baffle 30 connected to the observation plate group 20, which is connected to the water supply system 70 to inject water into the cavity; a water collection baffle 40 connected to the observation plate group 20 is connected to the return water system to discharge the grouting water in the cavity, that is, water containing dissolved grouting liquid.

[0032] In the aforementioned experimental setup, an observation plate group 20 is formed by three mutually perpendicular plates to simulate three-dimensional rock mass fractures. Grouting holes are installed on the observation plate group 20 to simulate grouting. The observation plate group 20 is also connected to a water injection baffle 30 and a water collection baffle 40 to inject and drain water from the cavity. This allows for analysis of the grouting sealing effect under three-dimensional conditions, and enables research on the diffusion morphology and laws of dynamic water grout. Compared to two-dimensional methods, this approach is more consistent with engineering practice and allows for direct quantitative observation of the sealing effect. It effectively simulates actual rock mass fractures of varying degrees and dynamic water conditions under different pressures. It features a high degree of mechanization, simple operation, and can obtain curves showing the relationship between diffusion performance and parameters such as grouting pressure and water pressure, facilitating the analysis of the sealing effect.

[0033] Specifically, the first plate 21, the second plate 22, and the third plate 23 forming the observation plate group 20 are transparent plexiglass plates, facilitating direct observation of the sealing effect by experimental personnel. The distance from the center of the grouting point is marked on the plexiglass plates for measuring the grout length, enabling quantitative evaluation of grout diffusion and sealing effect. The observation plate group 20 can be formed in several ways. In one embodiment, the observation plate group 20 is formed by connecting eight first plates 21, eight second plates 22, and eight third plates 23, with each pair of plates fixed by interlocking. In another embodiment, one first plate 21, one second plate 22, and one third plate 23 are spliced ​​and fixed to form a mutually perpendicular trihedron, and the observation plate group 20 is formed by setting eight sets of trihedrons.

[0034] In order to form a cavity, such as Figure 4 As shown, the experimental apparatus also includes pads 24, which are located in the intersection areas between any two of the first plate 21, the second plate 22, and the third plate 23, or in the intersection areas between the three plates, to form a support structure. The pads 24 cooperate with the first plate 21, the second plate 22, and the third plate 23 to form the cavity. Specifically, first pads 241 are provided at the cross intersections of the first plate 21 and the second plate 22, the first plate 21 and the third plate 23, and the second plate 22 and the third plate 23, respectively. Second pads 242 are provided at the cross intersections of the first plate 21, the second plate 22, and the third plate 23. The first pads 241 are two-dimensional cross block structures, and the second pads 242 are three-dimensional cross block structures.

[0035] Specifically, the water supply system 70 includes a high-pressure water pump connected to the water injection baffle 30, which is used to pump water to the water injection baffle 30. The water return system includes a water return tank (not shown in the figure), which is used to collect the water after it has passed through the cavity of the observation plate group 20.

[0036] Specifically, in one optional embodiment, the water injection baffle 30 and the water collection baffle 40 are disposed on opposite sides of the observation plate assembly 20, and the water injection baffle 30 is positioned along a first direction ( Figure 3 Water is injected into the cavity in the X direction, and the cavity drains water through the water collection baffle 40 in the first direction.

[0037] Specifically, in one optional embodiment, the water injection baffle 30 and the water collection baffle 40 are cross-shaped plates. The water injection baffle 30 has a cross-shaped water injection cavity 30a on the side facing the cavity, and a water injection hole 30b is provided in the central area of ​​the side of the water injection baffle 30 away from the cavity, and the water injection hole 30b communicates with the water injection cavity 30a. The water collection baffle 40 has a cross-shaped water collection cavity on the side facing the cavity, and a water collection hole is provided in the central area of ​​the side of the water collection baffle 40 away from the cavity, and the water collection hole communicates with the water collection cavity. By setting the cross-shaped water injection cavity 30a and water collection cavity, the water injection flow field and the drainage flow field can be made smoother, and the water in the three directions within the cavity can be made more uniform.

[0038] Specifically, in one alternative implementation, such as Figure 5As shown, the water injection baffle 30 and the water collection baffle 40 are respectively connected to the two end faces of the cross-shaped plate body formed by the first plate body 21 and the second plate body 22; the water injection baffle 30 is provided with at least one stepped surface 31 on the inner wall of the water injection cavity 30a, and the water collection baffle 40 is provided with at least one stepped surface 31 on the inner wall of the water collection cavity to match the cavity width of the cross-shaped plate body.

[0039] Specifically, the third plate 23 is located between the water injection baffle 30 and the water collection baffle 40. The distance between the third plate 23 and the water injection baffle 30 is less than the distance between the third plate 23 and the water collection baffle 40. The grouting hole is located on the second plate 22, and the grouting hole is positioned close to the first plate 21 and the third plate 23, that is, the grouting hole is infinitely close to the intersection area of ​​the first plate 21, the second plate 22, and the third plate 23, which allows the grout to be injected into the cavity quickly in three directions. Furthermore, since the resistance to grouting towards the water injection baffle 30 is relatively large under the action of water injection pressure, placing the third plate 23 closer to the water injection baffle 30 side allows the grout to be distributed more evenly within the cavity. More specifically, the grouting hole is located near the area of ​​the third plate 23 facing the water collection baffle 40. In other embodiments, the observation plate group 20 is provided with a number of grouting holes. The grouting holes are normally closed. During the experiment, a plan can be formulated to select a number of grouting holes for grouting, and grouting can be carried out in the order and timing of the designed grouting plan to analyze the grouting and sealing effect of different grouting plans.

[0040] Specifically, such as Figure 3 As shown, the experimental apparatus also includes an auxiliary baffle 50, which is a cross-shaped plate body. It is used to connect with the cross-shaped plate body formed by the first plate body 21 and the third plate body 23 and the cross-shaped plate body formed by the second plate body 22 and the third plate body 23 to seal the cavity.

[0041] The support frame 100 is formed into a cuboid frame, and the auxiliary baffle 50 is fixed on the support frame 100 to support and fix the observation plate group 20.

[0042] The grouting and sealing system 60 includes a grouting device and a grouting pressure detection device. The grouting pressure detection device is adapted to detect the grouting pressure. The grouting device includes a grouting pump for injecting grout into the cavity.

[0043] The water supply system 70 consists of a water tank, a water supply pipe, and a pressure-stabilized water supply system 70. It adopts an automatic booster water supply device, has no elevated water tank, and supplies water directly. A pressure sensor is installed on the pipeline of the pressure-stabilized water supply system 70 and connected to a monitoring and information system to monitor the pressure.

[0044] The experimental apparatus also includes a control system 80 and a data acquisition and monitoring system 90. The control system 80 is used to control the water supply system 70 and the grouting device to realize automatic real-time control and loading of dynamic water pressure and crack grouting. The data acquisition and monitoring system 90 is used to collect one or more parameters among dynamic water flow velocity, temperature, seepage pressure, grout pressure, and flow rate.

[0045] The method for simulating three-dimensional plate cracks using the above-mentioned experimental setup is as follows:

[0046] Before use, check the airtightness of the observation plate group 20, water supply tank, and water supply pipe, and also check whether each sensor is properly arranged. During use, first set the slit width of the plate according to the experimental requirements and install it. The first plate 21, the second plate 22, and the third plate 23 are isolated by the pad 24, and the height of the pad 24 simulates the experimental fracture width. Start the water supply system 70, and the data acquisition and monitoring system 90 acquires the water pressure and flow velocity in the fracture (i.e., cavity). The operator observes the formation of a stable water flow field in the fracture outside the observation plate group 20, and verifies the flow rate and velocity of water passing through coal and rock under different water head pressures, comparing it with the actual working conditions on site. If the flow rate and velocity are consistent, start the grouting and sealing system, and grout into the slit according to the experimental plan. Observe the grouting effect through the observation baffle, and record the changes in water pressure and flow rate through the data acquisition and monitoring system 90. After the grouting and sealing is completed, shut down the grouting and sealing system and the water supply system 70, and analyze the data.

[0047] Example 2

[0048] The experimental setup in this embodiment is used for conducting three-dimensional simulation experiments of coal and rock fractures. For example... Figure 2 , Figure 6 As shown, the experimental apparatus includes a support frame 100, an observation plate group 20 fixed to the support frame 100, a water injection baffle 30, a water collection baffle 40, and an auxiliary baffle 50 connected to the observation plate group 20. The main structure of the experimental apparatus is basically the same as in Embodiment 1. The difference lies in that, in this embodiment, the cavity is constructed from cast or 3D-printed rock mass to simulate rock strata, which can simulate the damage types and degrees of coal and rock masses under different mining pressures. Based on this, water flows from the water injection baffle 30 end to the water collection baffle 40 end, and sealing material is injected into the pre-set grouting holes on the observation plate group 20. The grouting sealing effect is then experimentally analyzed.

[0049] The simulated rock strata are arranged with a sensor group, which includes one or more of a pressure sensor, a seepage pressure sensor, and a flow sensor.

[0050] like Figure 6As shown, the experimental apparatus of this embodiment also includes a pressure application system 10 for applying pressure to the simulated rock strata. The pressure application system 10 includes a hydraulic cylinder 11 fixed to the support frame 100, and the output end of the hydraulic cylinder 11 acts on the observation plate assembly 20. The pressure application system 10 also includes a pressure pump, which controls the pressure application of the hydraulic cylinder.

[0051] To characterize the degree of damage to coal and rock masses caused by different mining pressures, it is necessary to conduct borehole inspection and statistical analysis of fracture data at the engineering site. Therefore, in one optional implementation, inspection holes, grouting holes, and drainage holes are provided on four auxiliary baffles 50. The inspection holes are used to observe the fracture conditions of the coal and rock before water pressurization and grouting, and can also be used as drainage and grouting holes later. The drainage holes are used to adjust the water pressure inside the simulation device, prevent uneven pressure distribution within the cavity, regulate the movement trend of the water in various directions, and ensure that the flow environment of the grout in the test model is similar to that in actual engineering. The fracture propagation range and width ratio distribution are analyzed, and the coal and rock seepage volume and water head height are statistically analyzed. Through on-site monitoring of coal and rock mass stress, strain, and fractures, and through theoretical calculations and numerical simulations, the basic conditions such as indoor experimental mining pressure and seepage intensity are determined.

[0052] The experimental apparatus in this embodiment also includes a control system 80 and a data acquisition and monitoring system 90. The control system 80 is used to control the water supply system 70, the grouting device, and the pressure application system 10 to realize automatic real-time control and loading of mine pressure, dynamic water pressure, and fracture grouting. The data acquisition and monitoring system 90 is used to collect one or more parameters among dynamic water flow velocity, temperature, seepage pressure, grout pressure, and flow rate.

[0053] The experimental setup in this embodiment is used to simulate a three-dimensional rock mass fissure dynamic water grouting and sealing test. The method of use includes: Before use, checking whether the hydraulic cylinder 11 is stably connected to ensure safety during pressurization. Checking the airtightness of the observation plate group 20, water supply tank, and water supply pipe, and simultaneously checking whether the sensors are properly arranged. During use, pressure is applied to the coal and rock through the hydraulic cylinder 11 of the pressurization system 10 to create fissures. The distribution and width of the fissures are observed through the viewing hole, and the data is recorded. The viewing hole is then sealed, and the water supply system 70 is started. The water supply pressure is adjusted using the water supply system 70 to obtain the water pressure and flow velocity within the fissures. A stable water flow field is observed within the fissures through the observation baffle. The flow rate and velocity of the water passing through the coal and rock under different head pressures are verified. When the flow rate and velocity are consistent, grout is injected into the coal and rock fissures according to the experimental plan using the grouting and sealing system and grouting holes. The grouting effect is observed through the observation baffle, and the changes in water pressure and flow rate are recorded through the monitoring and information collection system. After the cement grout sealing is completed, shut down the grouting sealing system, water supply system 70 and pressure system 10, and compile and analyze the data.

[0054] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A device for simulating water-flooding grouting plugging experiment of three-dimensional rock mass crack, characterized in that, The application relates to a support frame and an observation plate group fixed to the support frame, wherein the observation plate group comprises first, second and third plate bodies arranged perpendicularly to each other, the first, second and third plate bodies form a cross-shaped plate body structure, and a cavity is formed between adjacent first, second and third plate bodies; one or more of the first, second and third plate bodies are provided with a grouting hole. A water injection baffle connected to the observation plate group, wherein the water injection baffle is connected to a water supply system to inject water into the cavity. A water collecting baffle connected to the observation plate group, wherein the water collecting baffle is connected to a water return system to discharge grouting water in the cavity. The water injection baffle and the water collecting baffle are cross-shaped plate bodies, the water injection baffle is provided with a cross-shaped water injection cavity on one side facing the cavity, the water injection baffle is provided with a water injection hole in the central area away from the cavity, and the water injection hole is communicated with the water injection cavity; the water collecting baffle is provided with a cross-shaped water collecting cavity on one side facing the cavity, the water collecting baffle is provided with a water collecting hole in the central area away from the cavity, and the water collecting hole is communicated with the water collecting cavity.

2. The device for simulating the water-filling grouting plugging experiment of the fissure in the three-dimensional rock mass according to claim 1, characterized in that, The water injection baffle and the water collecting baffle are respectively connected to the two side end faces of the cross-shaped plate body formed by the first plate body and the second plate body; at least one step surface is arranged on the inner wall of the water injection cavity of the water injection baffle, and at least one step surface is arranged on the inner wall of the water collecting cavity of the water collecting baffle, so as to match the width of the cavity of the cross-shaped plate body.

3. The device for simulating the water-filling grouting plugging experiment of the fissure in the three-dimensional rock mass according to claim 2, characterized in that, The third plate body is located between the water injection baffle and the water collecting baffle, the distance between the third plate body and the water injection baffle is smaller than the distance between the third plate body and the water collecting baffle, the grouting hole is arranged on the second plate body, and the grouting hole is arranged close to the first plate body and the third plate body.

4. The device for simulating the water-filling grouting plugging experiment of the three-dimensional rock mass crack according to claim 3, characterized in that, An auxiliary baffle is further arranged, the auxiliary baffle is a cross-shaped plate body, and the auxiliary baffle is connected to the cross-shaped plate body formed by the first plate body and the third plate body and the cross-shaped plate body formed by the second plate body and the third plate body, so as to seal the cavity.

5. The device for simulating the water-filling grouting plugging experiment of the fissure in the three-dimensional rock mass according to claim 4, characterized in that, A cushion block is further arranged, the cushion block matches the first plate body, the second plate body and the third plate body to form the cavity, and the cushion block is arranged in the intersection area between two of the first plate body, the second plate body and the third plate body or in the intersection area between the three plate bodies.

6. The device for simulating the water-filling grouting plugging experiment of the three-dimensional rock mass crack according to claim 1, characterized in that, A simulated rock stratum formed by a rock body constructed by pouring or 3D printing is arranged in the cavity, a sensor group is arranged on the simulated rock stratum, and the sensor group comprises one or more of a pressure sensor, a seepage pressure sensor and a flow sensor.

7. The device according to claim 1, wherein, A pressure applying system for applying pressure to the simulated rock stratum is further arranged, the pressure applying system comprises a hydraulic oil cylinder fixed to the support frame, and an output end of the hydraulic oil cylinder acts on the observation plate group.

8. The device according to claim 7, wherein, The grouting hole is connected to a grouting plugging system, and the grouting plugging system comprises a grouting device and a grouting pressure detection device.

9. The device for simulating the water-filling grouting plugging experiment of the fissure in the three-dimensional rock mass according to claim 8, characterized in that, ​ 10. The device for simulating the water-filling grouting plugging experiment of the fissure in the three-dimensional rock mass according to claim 9, characterized in that, The control system is used for controlling one or more of the water supply system, the grouting plugging system and the pressure application system, so as to realize automatic real-time control loading of mine pressure, dynamic water pressure and fissure grouting. The data acquisition and monitoring system is used for acquiring one or more parameters of dynamic water flow rate, temperature, osmotic pressure, grout pressure and flow rate.

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