System for testing corrosivity, dissolution and expansibility of gypsum rock

Abstract

The invention discloses a gypsum rock corrosivity, corrosivity and expansibility test system which comprises a lining simulation device, a surrounding rock lining simulation device and a magnetic outer frame, the lining simulation device is located in a magnetic suspension rotating device, the surrounding rock lining simulation device is fixedly arranged on the lining simulation device in a sleeving mode, and the magnetic outer frame covers the surrounding rock lining simulation device. The magnetic suspension rotating device can enable the surrounding rock and lining structure simulation device to suspend and rotate; the expansive force testing system is used for measuring the pressure strain of the surrounding rock-lining device; the temperature control system is used for measuring the temperature and the change of the temperature in the system; the flow field simulation analysis system can inject water into the surrounding and lining simulation system to simulate underground water seepage and detect water quality changes; the grouting system is used for grouting into the surrounding rock lining simulation device; the integrity testing device is used for pressing inert gas into the magnetic suspension rotating device so as to test the integrity of the rock mass. The system for testing the corrosivity, the corrosivity and the expansibility of the gypsum rock can be used for conveniently and accurately detecting the corrosivity, the corrosivity and the expansibility of the gypsum rock, simulating underground water and slurry seepage and accurately measuring the temperature change of the system.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction equipment, and in particular to a gypsum rock corrosiveness, dissolution and expansion test system. Background Art

[0002] During the tunnel excavation process, the dissolution, expansion and corrosiveness of gypsum rock change with the water pressure and surrounding rock permeability. Understanding the laws of such changes is crucial to the durability design and maintenance of the tunnel.

[0003] At present, the main method for testing gypsum rock in tunnels is to study the relationship between physical indicators and expansion force by using powder samples, or to conduct radial or axial free expansion rate tests using rock samples, and to obtain the lateral restrained expansion force under the condition of constant volume by indirect methods, to establish stress-strain model and strain-time model, or to establish a three-dimensional expansion constitutive model using a triaxial expansion tester. Based on this, the tunnel lining structure design is carried out.

[0004] Whether using powdered samples or rock samples, it is impossible to simulate the relative relationship between the surrounding rock occurrence and the tunnel, nor is it possible to simulate the interaction between the dissolution, expansion, and corrosiveness of unloaded gypsum rock under a multi-field coupling state and its relationship with time, which makes it difficult to achieve strength coordination and deformation coordination between the surrounding rock and lining in the project. Summary of the invention

[0005] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a gypsum rock corrosive dissolution and expansion test system, which uses 3D printing to control the uneven distribution of gypsum, and realizes the dissolution, expansion and corrosive change laws of gypsum rock under unloading conditions under multi-field coupling by changing the rock layer thickness and occurrence, rock integrity, confining pressure and permeability.

[0006] In order to achieve the above object, the present invention is implemented through the following technical scheme: a gypsum rock corrosive dissolution and expansion test system, comprising:

[0007] The magnetic levitation rotating device is a hollow transparent body;

[0008] A surrounding rock lining structure simulation system is located in the magnetic suspension rotating device, comprising a surrounding rock lining simulation device, a lining simulation device and a magnetic outer frame, wherein the surrounding rock lining simulation device is arranged between the lining simulation device and the magnetic outer frame and is fixed on the lining simulation device; the lining simulation device has an adjustable stiffness, and the magnetic outer frame cover is arranged outside the surrounding rock-lining simulation device; the magnetic force generated between the magnetic suspension rotating device and the magnetic outer frame can cause the surrounding rock lining structure simulation system to suspend in the magnetic suspension rotating device and can drive the surrounding rock lining structure simulation system to rotate;

[0009] An expansion force testing system, installed on the surrounding rock lining simulation device, is used to measure the pressure and strain generated by the expansion of the surrounding rock;

[0010] The flow field simulation analysis system and the grouting system are connected to the inner cavity of the magnetic suspension rotating device, and can simulate groundwater and slurry seepage by grouting and injecting water into the surrounding rock lining structure simulation system, and can detect the change of water quality after the gypsum rock of the device is dissolved;

[0011] a temperature control system, disposed in the magnetic levitation rotating device, for measuring the heat generated by the hydration of the gypsum rock in the magnetic levitation rotating device and its temperature change; and

[0012] The integrity testing device is connected to the inner cavity of the magnetic suspension rotating device through an air pipe, and can pressurize inert gas into the magnetic suspension rotating device to test the integrity of the rock mass.

[0013] Furthermore, the magnetic levitation rotating device includes an outer shell, a magnetic outer frame and a magnetic pole fixed to the outer shell. The outer shell is a transparent body. The outer shell cover is arranged outside the magnetic outer frame. A plurality of magnetic poles are fixed on the outer shell at circumferential intervals. The magnetic force of each magnetic pole is adjustable, and the magnetic outer frame is driven to rotate in the outer shell by changing the magnetic force.

[0014] Furthermore, the surrounding rock lining simulation device includes an inner frame and a plurality of surrounding rock pieces. The inner frame is arranged close to the inner wall of the magnetic outer frame, the lining simulation device is located in the inner frame, and the plurality of surrounding rock pieces are fixed on the inner frame at intervals and are located between the inner frame and the lining simulation device.

[0015] Furthermore, the surrounding rock simulation system inner frame also includes a heat insulation layer, and the heat insulation layer is arranged between the magnetic inner frame and the surrounding rock lining simulation device.

[0016] Furthermore, the lining simulation device comprises a multi-layer lining structure, wherein the multi-layer lining structure is stacked layer by layer from the inside to the outside, and the stiffness of each layer of the lining structure is adjustable.

[0017] Furthermore, the expansion force testing system includes a plurality of pressure gauges, and the plurality of pressure gauges are installed at intervals on the inner side of the inner frame.

[0018] Furthermore, the temperature control system includes a temperature measuring instrument and a temperature regulating component. The temperature measuring instrument is located in the lining structure simulation system. The temperature measuring instrument is electrically connected to the temperature regulating component and can heat the surrounding rock system.

[0019] Furthermore, the grouting system includes a grouting pipe and a plurality of slurry bags, wherein the plurality of slurry bags are respectively fixed in the outer shell and the surrounding rock lining simulation device, each of the slurry bags is connected to a grouting pipe into which slurry can be injected, and the slurry bags can rupture under pressure.

[0020] Furthermore, the flow field simulation and analysis system includes a water injection pipe, a water inlet pipe, a water outlet pipe, a containing bottle and a water quality sensor. The water injection pipe is arranged on the shell and connects the shell with an external water source. The water inlet pipe is connected to the inside of the surrounding rock lining simulation device and can rotate radially with the inner frame, and the shell of the water outlet pipe. The containing bottle is placed on one side of the shell and is connected to the water outlet pipe during the test. The water quality sensor is installed on the containing bottle and is used to analyze the ion content of the system solution after the surrounding rock is dissolved.

[0021] Furthermore, it also includes a base and a weighing system, and the magnetic suspension rotating device is fixed to the weighing system through the base.

[0022] Beneficial effects of the present invention:

[0023] The above-mentioned gypsum rock corrosive dissolution and expansibility test system includes a magnetic levitation rotating device, a surrounding rock lining structure simulation system, and a grouting system. When in use, the current of the magnetic poles on the inner wall of the magnetic levitation rotating device can be adjusted and controlled respectively to make the magnetic poles generate deflection magnetic force, driving the surrounding rock lining structure simulation system to suspend and rotate in the magnetic levitation rotating device, so as to simulate the relative geometric relationship between the layered gypsum rock and the tunnel and the surrounding rock lining structure simulation system under different water pressure and flow rate conditions, and the expansion and expansibility changes of the gypsum rock under dissolution.

[0024] When in use, the lining simulation device can be used to radially pressurize the surrounding rock lining simulation device to break the surrounding rock lining simulation device and test the integrity of the rock mass. At the same time, various support conditions can be simulated by adjusting the structural stiffness of the lining simulation device. In addition, water can be injected into the magnetic suspension rotating device through the flow field simulation analysis system, and the surrounding rock permeability can be simulated by controlling the simulated water pressure and flow rate changes. A sensor is installed in the solution bottle at the water outlet to analyze the system ion changes.

[0025] By adopting the above-mentioned gypsum rock corrosive dissolution and swelling test system, the dissolution, swelling and corrosive change laws of gypsum rock under unloading conditions under multi-field coupling can be tested by changing the rock layer thickness and occurrence, rock integrity, confining pressure and permeability.

[0026] In addition, through the above system, by changing the lining structure and grouting materials, it is also possible to find economical, durable, safe and corrosion-resistant lining structures and slurry materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation of the present invention, the following will briefly introduce the drawings required for use in the specific implementation. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0028] Figure 1 A schematic diagram of a gypsum rock corrosive dissolution and swelling test system provided by one embodiment of the present invention;

[0029] Figure 2 for Figure 1 A schematic diagram of a surrounding rock lining simulation device in a gypsum rock corrosive dissolution and swelling test system is shown;

[0030] Figure 3 for Figure 1 A schematic diagram of the assembly of a surrounding rock lining structure simulation system in a gypsum rock corrosive dissolution and swelling test system;

[0031] Figure 4 for Figure 1 A water injection pipe in a gypsum rock corrosive dissolution and expansion test system shown;

[0032] Reference numerals:

[0033] 100, magnetic levitation rotating device; 110, outer shell; 120, magnetic pole; 130, magnetic outer frame; 200, surrounding rock lining structure simulation system; 210, lining simulation device; 220, surrounding rock lining simulation device; 221, inner frame; 222, surrounding rock piece; 230, magnetic outer frame; 240, thermal insulation layer; 300, grouting system; 310, grouting pipe; 400, expansion force testing system; 410, pressure gauge; 500, temperature control system; 600, flow field simulation and analysis system; 610, water injection pipe; 620, water outlet pipe; 630, holding bottle; 640, water quality sensor; 700, integrity measurement device; 800, base; 900, weighing system. DETAILED DESCRIPTION

[0034] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0035] See also Figures 1 to 4 The present invention provides a gypsum rock corrosive dissolution and expansion test system, including a magnetic suspension rotating device 100, a surrounding rock lining structure simulation system 200, a grouting system 300, an expansion force testing system 400, a temperature control system 500, a flow field simulation analysis system 600 and an integrity measurement device 700.

[0036] Specifically, the magnetic suspension rotating device 100 is a hollow transparent body. The surrounding rock lining structure simulation system 200 is located in the magnetic suspension rotating device 100, and the surrounding rock lining structure simulation system 200 includes a lining simulation device 210, a surrounding rock lining simulation device 220 and a magnetic outer frame 230. The magnetic outer frame 230 is arranged outside the surrounding rock lining simulation device 220, and the surrounding rock lining simulation device 220 is arranged on the lining simulation device; and the shape of the surrounding rock lining simulation device 220 is changeable; the magnetic outer frame 230 is arranged outside the surrounding rock lining simulation device 220, and the magnetic force generated between the magnetic suspension rotating device 100 and the magnetic outer frame 230 can make the surrounding rock lining structure simulation system 200 suspend in the magnetic suspension rotating device 100 and can drive the surrounding rock lining structure simulation system 200 to rotate.

[0037] The grouting system 300 is connected to the surrounding rock lining structure simulation system 200 and can inject grout into the surrounding rock lining simulation device 220. The expansion force testing system 400 is installed on the surrounding rock lining simulation device 220 and is used to measure the pressure and strain generated by the surrounding rock lining simulation device 220. The temperature control system 500 is arranged in the magnetic levitation rotating device 100 and is used to measure and regulate the heat and temperature in the magnetic levitation rotating device 100. The flow field simulation and analysis system 600 can inject water into the surrounding rock lining structure simulation system 200 and detect the water quality in this system. The integrity measurement device 700 is connected to the surrounding rock lining structure simulation system 200 through the air pipe and can fill the surrounding rock lining structure simulation system 200 with inert gas.

[0038] When in use, the magnitude of the current passing through the magnetic poles 120 on the inner wall of the magnetic levitation rotating device 100 can be adjusted and controlled respectively to cause the magnetic poles 120 to generate a deflection magnetic force, thereby driving the surrounding rock lining structure simulation system 200 to suspend and rotate in the magnetic levitation rotating device 100, so as to simulate the relative geometric relationship between the layered gypsum rock and the tunnel, and the expansion and expansion changes of the surrounding rock lining structure simulation system 200 under different water pressure and flow rate conditions, and the gypsum rock dissolution.

[0039] When in use, the lining simulation device 210 can be used to radially pressurize the surrounding rock lining simulation device 220 to break the surrounding rock lining simulation device 220 and test the integrity of the rock mass. At the same time, by adjusting the structural stiffness of the lining simulation device 210, various support working conditions can be simulated.

[0040] In addition, water can be injected into the magnetic levitation rotating device 100 through the flow field simulation analysis system 600, and the permeability of the surrounding rock can be simulated by controlling the simulated water pressure and flow rate changes. A sensor is installed in the solution bottle at the water outlet to analyze the system ion changes.

[0041] The above-mentioned gypsum rock corrosive dissolution and swelling test system is used to test the dissolution, swelling and corrosive changes of gypsum rock under unloading conditions under multi-field coupling by changing the rock layer thickness and occurrence, rock integrity, confining pressure and permeability.

[0042] In addition, through the above system, by changing the lining structure and grouting materials, we can find economical, durable, safe and corrosion-resistant lining structures and slurry materials.

[0043] In this embodiment, the magnetic suspension rotating device 100 includes a shell 110, a magnetic outer frame 130 and a magnetic pole 120. The shell 110 is a transparent body. The shell 110 is provided with a cover at intervals outside the magnetic outer frame 130. There are multiple magnetic poles 120, and the multiple magnetic poles 120 are fixed on the shell 110 at intervals in the circumferential direction. The magnetic force of each magnetic pole 120 is adjustable. The magnetic strength of the magnetic pole 120 is adjusted to generate a rotation torque, which drives the magnetic outer frame to rotate, and the magnetic outer frame 230 rotates in the shell 110. If the magnetic pole 120 is a magnet block, the magnetic force can be adjusted by changing the position and number of the magnet block, and if it is an electromagnet, the magnetic force can be adjusted by changing the current.

[0044] In a specific implementation, the number of magnetic poles 120 can be four, and the four magnetic poles 120 are evenly spaced in the circumferential direction. By adjusting the size of a single magnetic pole 120, the surrounding rock lining structure simulation system 200 is suspended in the magnetic suspension rotating device 100 and rotates. 1. How to keep suspended, 2. How to maintain a specified state

[0045] In this embodiment, the surrounding rock lining simulation device 220 includes an inner frame 221 and a plurality of blade-shaped surrounding rock pieces 222 constrained by the inner frame 221. The inner frame 221 is arranged close to the inner wall of the magnetic outer frame 130. The lining simulation device 210 is located in the inner frame 221. The plurality of surrounding rock pieces 222 are fixed to the inner frame 221 at intervals and can be detachably fixed thereto, and are located between the inner frame 221 and the lining simulation device 210.

[0046] During the test, the number of surrounding rock pieces 222, the distance between two adjacent surrounding rock pieces 222, the angle between the surrounding rock piece 222 and the horizontal plane, and the thickness of the surrounding rock piece 222 can be changed to simulate the heterogeneity of the real surrounding rock. In specific implementation, the material of the surrounding rock piece 222 can be selected as gypsum, and the gypsum content of a certain part of the tunnel can be adjusted by adjusting the arrangement of the gypsum surrounding rock. Or according to the dissolution during the test, the damaged blade rock layer at the specified part can be replaced to improve the test efficiency.

[0047] In a specific implementation, the surrounding rock piece 222 can be manufactured by 3D printing, and the gypsum content and its distribution are pre-set in the printing program.

[0048] As a preferred embodiment, the surrounding rock lining structure simulation system 200 further includes a heat insulation layer 240, which is disposed between the magnetic outer frame 230 and the surrounding rock lining simulation device 220. The heat insulation layer 240 prevents the surrounding rock from losing heat.

[0049] In this embodiment, the lining simulation device 210 includes a multi-layer lining structure, and the lining stiffness is adjusted by the intermediate layer.

[0050] In this embodiment, the expansion force testing system 400 includes a plurality of pressure gauges 410, which may be sensors such as film-shaped pressure boxes, strain gauges, etc. The plurality of pressure gauges 410 are evenly spaced around the edge of the surrounding rock lining simulation device 220 to measure the pressure and strain generated by the surrounding rock lining simulation device 220 as it dissolves and expands.

[0051] In this embodiment, the temperature control system 500 includes a temperature measuring instrument and a temperature regulating component. The temperature measuring instrument is located in the surrounding rock lining structure simulation system 200. The temperature measuring instrument is electrically connected to the temperature regulating component and controls the temperature of the surrounding rock lining structure simulation system.

[0052] In this embodiment, the grouting system 300 includes a grouting pipe 310 and multiple slurry bags. The multiple grouting pipes are respectively fixed to the outer shell 110, and the grouting bags are buried in the surrounding rock lining simulation device 220. Each slurry bag is connected to a grouting pipe 310 that can inject slurry into it.

[0053] Through simulated grouting, we can check the effect of grouting on dissolution and expansion under the above conditions. There are two grouting methods:

[0054] The first one is that after the excavation of the face, grouting is performed on designated locations as needed.

[0055] The second type: reverse grouting: that is, before the test begins, a slurry bag is pre-buried at the designated location, and the critical fracture pressure of the slurry bag is set. When the pressure is triggered, the slurry bag breaks, and the slurry begins to flow out and flows along the cracks or rock formations to the tunnel face. In addition, the slurry bag is connected to an external pipeline for regular grouting.

[0056] In this embodiment, the flow field simulation analysis system 600 includes a water injection pipe 610 (只需要注入围岩内) , water inlet pipe, water outlet pipe 620, container bottle 630 and water quality sensor 640. The water injection pipe 610 is arranged on the housing 110 and is connected to the external water source. The water inlet pipe is connected to the interior of the surrounding rock lining simulation device. One end of the water outlet pipe 620 is connected to the housing 110, and the other end is connected to the container bottle 630. The water quality sensor 640 is connected to the water outlet pipe 620 and can measure the SO4 content of the liquid passing through the water outlet pipe 620. 2- The content.

[0057] In specific implementation, the depth of insertion of the water inlet pipe is changed, the water pressure of the injected water is used to simulate the flow rate, and the change of ions in the system is analyzed by the water quality sensor 640.

[0058] In specific implementation, the system also includes a base 800 and a weighing system 900. The magnetic levitation rotating device 100 is fixed to the weighing system 900 through the base 800. The weighing system 900 can intuitively reflect the mass change of the entire system, further facilitating the experiment.

[0059] Installation method of the above gypsum rock corrosive dissolution and expansion test system:

[0060] 1. Printing and production of surrounding rock slice 222;

[0061] 2. Assemble the inner frame 221 and the surrounding rock pieces 222 and install them on the lining simulation device 210, and then install the expansion pressure gauge 410, the insulation layer 240 and the magnetic outer frame 230.

[0062] 3. Install the grouting pipe 310 and the water injection pipe 610;

[0063] 5. Install the magnetic suspension rotating device 100;

[0064] 6. According to the relationship between the rock formation occurrence and the tunnel section to be simulated, the magnetic pole 120 is started to drive the surrounding rock lining structure simulation system 200 to rotate to a predetermined state;

[0065] 7. Use temperature control system 500 to measure initial temperature, calibrate instrument weighing system 900, pressure gauge 410

[0066] 8. Axial pressure is applied through the lining simulation device 210 to make the rock layer reach a predetermined degree of integrity, and then the variable stiffness lining simulates the primary support and secondary lining construction conditions by adjusting the lining stiffness.

[0067] 9. The integrity calculation system uses the amount of inert gas pressed in for calculation. Before the test begins, press in the inert gas and record the amount of pressure V1. Then exhaust the inert gas. After axial pressure is applied, press in the inert gas again and measure the amount of pressure V2. Use Kv = V2 / V1 to calculate the integrity.

[0068] 10. The flow field simulation and analysis system 600 injects water into the surrounding rock lining simulation device 220, and simulates the water pressure and seepage velocity by controlling the water head of the water injection pipe and switching the integrated pipe at the low water level.

[0069] 11. After the scheduled time, start the weighing system and image scanning to measure the remaining rock weight, expansion pressure, heat, and ion concentration.

[0070] The above-mentioned gypsum rock corrosive dissolution and swelling test system is used to test the dissolution, swelling and corrosive changes of gypsum rock under unloading conditions under multi-field coupling by changing the rock layer thickness and occurrence, rock integrity, confining pressure and permeability; by changing the lining structure and grouting materials, economical, durable and safe corrosion-resistant lining structure and slurry material are found.

[0071] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A gypsum rock corrosiveness, dissolution and expansion test system, characterized in that: include: The magnetic levitation rotating device is a hollow transparent body; A surrounding rock lining structure simulation system is located in the magnetic suspension rotating device, comprising a surrounding rock lining simulation device, a lining simulation device and a magnetic outer frame, wherein the surrounding rock lining simulation device is arranged between the lining simulation device and the magnetic outer frame and fixed on the lining simulation device; the lining simulation device has an adjustable stiffness, and the magnetic outer frame cover is arranged outside the surrounding rock-lining simulation device; the magnetic force generated between the magnetic suspension rotating device and the magnetic outer frame can cause the surrounding rock lining structure simulation system to suspend in the magnetic suspension rotating device and can drive the surrounding rock lining structure simulation system to rotate; An expansion force testing system, installed on the surrounding rock lining simulation device, is used to measure the pressure and strain generated by the expansion of the surrounding rock; The flow field simulation analysis system and the grouting system are connected to the inner cavity of the magnetic suspension rotating device, and can simulate groundwater and slurry seepage by grouting and injecting water into the surrounding rock lining structure simulation system, and can detect the change of water quality after the gypsum rock of the device is dissolved; A temperature control system is arranged in the magnetic suspension rotating device and is used to measure the heat generated by the hydration of the gypsum rock in the magnetic suspension rotating device and its temperature change; and The integrity testing device is connected to the inner cavity of the magnetic suspension rotating device through an air pipe, and can pressurize inert gas into the magnetic suspension rotating device to test the integrity of the rock mass.

2. The gypsum rock corrosiveness, dissolution and swelling test system according to claim 1 is characterized in that: The magnetic levitation rotating device includes an outer shell, a magnetic outer frame and magnetic poles fixed to the outer shell. The outer shell is a transparent body. The outer shell cover is arranged outside the magnetic outer frame. A plurality of magnetic poles are fixed to the outer shell at circumferential intervals. The magnetic force of each magnetic pole is adjustable. The magnetic outer frame is driven to rotate in the outer shell by changing the magnetic force.

3. The gypsum rock corrosiveness, dissolution and expansion testing system according to claim 2 is characterized in that: The surrounding rock lining simulation device includes an inner frame and multiple surrounding rock pieces. The inner frame is arranged close to the inner wall of the magnetic outer frame, the lining simulation device is located in the inner frame, and the multiple surrounding rock pieces are fixed on the inner frame at intervals and located between the inner frame and the lining simulation device.

4. The gypsum rock corrosiveness, dissolution and expansion testing system according to claim 1 or 3, characterized in that: The surrounding rock simulation system inner frame also includes a heat insulation layer, and the heat insulation layer is arranged between the magnetic inner frame and the surrounding rock lining simulation device.

5. The gypsum rock corrosiveness, dissolution and expansion testing system according to claim 1 is characterized in that: The lining simulation device comprises a multi-layer lining structure, wherein the multi-layer lining structure is stacked layer by layer from the inside to the outside, and the stiffness of each layer of the lining structure is adjustable.

6. The gypsum rock corrosiveness, dissolution and expansion testing system according to claim 2, characterized in that: The expansion force testing system comprises a plurality of pressure gauges, and the plurality of pressure gauges are installed at intervals inside the inner frame.

7. The gypsum rock corrosiveness, dissolution and expansion testing system according to claim 1, characterized in that: The temperature control system includes a temperature measuring instrument and a temperature regulating component. The temperature measuring instrument is located in the lining structure simulation system. The temperature measuring instrument is electrically connected to the temperature regulating component and can heat the surrounding rock system.

8. The gypsum rock corrosiveness, dissolution and expansion testing system according to claim 2, characterized in that: The grouting system includes a grouting pipe and a plurality of slurry bags. The plurality of slurry bags are respectively fixed in the outer shell and the surrounding rock lining simulation device. Each of the slurry bags is connected to a grouting pipe into which slurry can be injected. The slurry bags can rupture under pressure.

9. The gypsum rock corrosiveness, dissolution and expansion testing system according to claim 3, characterized in that: The flow field simulation and analysis system includes an injection pipe, a water inlet pipe, a water outlet pipe, a containing bottle and a water quality sensor. The injection pipe is arranged on the outer shell and connects the outer shell with an external water source. The water inlet pipe is connected to the inside of the surrounding rock lining simulation device and can rotate radially with the inner frame. The outer shell of the water outlet pipe, the containing bottle is placed on one side of the outer shell and is connected to the water outlet pipe during the test. The water quality sensor is installed on the containing bottle and is used to analyze the ion content of the system solution after the surrounding rock is dissolved.

10. The gypsum rock corrosiveness, dissolution and expansion testing system according to claim 1, characterized in that: It also includes a base and a weighing system, and the magnetic suspension rotating device is fixed on the weighing system through the base.

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