Device and method for simulating seepage erosion of fractured rock mass in geothermal environment

Abstract

The invention relates to the technical field of geothermal energy exploitation, and particularly discloses a device and a method for simulating seepage erosion of a fractured rock mass in a geothermal environment, the device for simulating seepage erosion of the fractured rock mass in the geothermal environment provided by the invention comprises a power driving module, a seepage erosion testing module, a temperature maintaining module, an information acquisition and analysis module and the like, the seepage erosion condition of the single-fracture rock in the geothermal exploitation process of the abandoned mine can be achieved, and the method has the advantages of being easy to operate, low in manufacturing cost and visual. The device can realize rock seepage test in a certain temperature field, is suitable for shallow geothermal energy exploitation, and can clearly and intuitively see the seepage erosion process so as to capture the seepage erosion process information. According to the method, fracture erosion morphology graphs under different hydraulic pressures and fracture erosion morphology graphs under different temperatures can be obtained, seepage erosion is stable, and the method is simple to operate and easy to master.

Description

Technical Field

[0001] The present invention relates to the technical field of geothermal energy exploitation, and in particular to a device and method for simulating seepage erosion of fractured rock mass in a geothermal environment. Background Art

[0002] As a large energy consumer, my country is more urgent to develop clean and efficient new energy. Geothermal energy, as a low-cost, clean and renewable energy, has a certain role in promoting my country's energy transformation. Nowadays, the development and utilization of geothermal energy resources in abandoned / closed mines is relatively extensive, and heat pump systems are mostly used to extract mine water for cooling in summer and for heating in winter. During the extraction or recharge process, a large number of fracture networks will be generated in the weakly cemented rock strata in the abandoned mine goaf. Under a certain temperature environment, the water flow will continuously erode the fracture channel, causing the fractures to increase continuously, resulting in water inrush disasters, which have a great impact on the stability of the surrounding rock of the abandoned mine. Therefore, it is very important to study the mechanism of surrounding rock instability induced by seepage erosion in the abandoned mine goaf, which can not only ensure the stability and safety of abandoned mines, but also have a certain significance for improving the efficiency of shallow geothermal energy mining.

[0003] Therefore, it is urgent to provide a device for simulating the seepage erosion of fractured rock mass in geothermal environment, so as to simulate the seepage erosion of single fractured rock in the process of geothermal mining in abandoned mines. Summary of the invention

[0004] The purpose of the present invention is to provide a device and method for simulating seepage erosion of fractured rock mass in a geothermal environment, so as to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above object, the present invention provides a device for simulating seepage erosion of fractured rock mass in a geothermal environment, comprising:

[0006] A seepage erosion test module, which is used to simulate the evolution of crack morphology during the seepage erosion process and obtain information on the seepage erosion process;

[0007] A power driving module, the power driving module is used to supply the seepage erosion test module with fluids for seepage erosion at different pressures;

[0008] A temperature maintaining module, which is arranged at the periphery of the seepage erosion test module and is used to heat and keep the seepage erosion test module warm;

[0009] The information collection and analysis module is used to obtain the erosion mass of the fracture sample in the seepage erosion test module and calculate the erosion rate.

[0010] Preferably, the seepage erosion test module includes a seepage erosion device equipped with a crack sample and a high-speed camera for obtaining information on the seepage erosion process, and the wall panel of the seepage erosion device facing the high-speed camera is a transparent structure; the power drive module is connected to the water inlet of the seepage erosion device through a pipeline, the information collection and analysis module is connected to the water outlet of the seepage erosion device through a pipeline, and the inner wall of the temperature maintenance module is in contact with the seepage erosion device.

[0011] Preferably, the seepage erosion device is a hollow rectangular columnar structure, and the seepage erosion device includes a rear limit plate and a front limit plate, and two lateral limit plates, a top limit water-permeable plate and a bottom limit water-permeable plate are arranged between the rear limit plate and the front limit plate, and the two ends of the two lateral limit plates, the top limit water-permeable plate and the bottom limit water-permeable plate are detachably connected to the rear limit plate and the front limit plate respectively; two pads are arranged between the two lateral limit plates, and the two pads are respectively fixed to the two lateral limit plates by bolts, and the crack specimens are fixedly connected to the opposite side of the pads, and the crack specimens on the two pads are a self-made crack is formed between the two plates; the water inlet of the seepage erosion device is arranged on the top limit water-permeable plate, and the water outlet of the seepage erosion device is arranged on the bottom limit water-permeable plate, and the water inlet and the water outlet are arranged corresponding to the self-made crack; an observation port is opened in the middle of the front limit plate, and the observation port is arranged corresponding to the crack sample, and the observation port is arranged corresponding to the high-speed camera; an acrylic perspective plate is arranged between the front limit plate and the crack sample, and the left and right ends of the acrylic perspective plate are respectively in contact with the two lateral limit plates, and the upper and lower ends of the acrylic perspective plate are respectively in contact with the top limit water-permeable plate and the bottom limit water-permeable plate.

[0012] Preferably, the power drive module includes:

[0013] An air compressor, wherein a pressure gauge 1 for detecting the internal pressure of the air compressor is installed on the air compressor;

[0014] A sealed water tank 1, wherein the air outlet of the air compressor is connected to the air inlet at the top of the sealed water tank 1, a pressure gauge 2 for detecting the internal pressure of the sealed water tank 1 is installed at the top of the sealed water tank 1, and the water outlet of the sealed water tank 1 is connected to the water inlet of the seepage erosion device; valves are installed at the air inlet and water outlet of the sealed water tank 1, and a flow meter is installed on the pipeline between the sealed water tank 1 and the seepage erosion device.

[0015] Preferably, the temperature maintenance module includes an annular insulation chamber covered on the periphery of the seepage erosion device, the inner wall of the annular insulation chamber is in contact with the outer wall of the seepage erosion device, the material of the annular insulation chamber is high temperature resistant glass, a slot for placing a temperature control heating rod is provided on the top of the annular insulation chamber, and the interior of the annular insulation chamber is filled with a heat conductive medium.

[0016] Preferably, the information collection and analysis module includes:

[0017] A sealed water tank 2, wherein a filter is arranged in the sealed water tank 2, the water outlet of the seepage erosion device is connected with the water inlet of the sealed water tank 2 through a pipeline, and the water inlet and the water outlet of the sealed water tank 2 are respectively arranged on both sides of the filter;

[0018] A water storage tank, the water storage tank is located below the sealed water tank, and the water outlet of the sealed water tank 2 is connected to the water storage tank through a pipeline;

[0019] A weighing platform 1, wherein the sealed water tank 2 is arranged on the top of the weighing platform 1;

[0020] Weighing platform 2, the water tank is arranged on the top of the weighing platform 2;

[0021] The computer terminal is electrically connected to the weighing platform 1 and the weighing platform 2.

[0022] Preferably, the information collection and analysis module further includes:

[0023] A support frame, a pulley is installed at the bottom of the support frame, the support frame is a layered structure, the seepage erosion device is arranged on the top layer of the support frame, the second sealed water tank and the first weighing platform are arranged on the second top layer of the support frame, and the water tank and the second weighing platform are arranged on the bottom layer of the support frame.

[0024] The present invention uses a test method using a device that simulates seepage erosion of fractured rock mass in a geothermal environment, and specifically comprises the following steps:

[0025] S1. Assemble a device for simulating seepage erosion of fractured rock mass in a geothermal environment, and place a fracture sample in the seepage erosion device;

[0026] S2, turning on the power of the air compressor, observing the internal pressure of the air compressor by the pressure gauge 1, when the internal pressure of the air compressor reaches the preset pressure, opening the inlet switch of the sealed water tank 1;

[0027] S3, using pressure gauge 2 to observe the internal pressure of sealed water tank 1, when the internal pressure of sealed water tank 1 reaches a preset water pressure, opening the outlet switch of sealed water tank 1;

[0028] S4, using a temperature-controlled heating rod to heat the annular heat preservation chamber to a required temperature, and continue heating to keep it at the current temperature;

[0029] S5. Turn on the water inlet and outlet switches of the seepage erosion device to conduct a seepage erosion test. At the same time, turn on a high-speed camera to record the erosion morphology, record the weighing data of the two weighing platforms, and calculate the erosion mass based on the weighing data to obtain the erosion rate of the fracture sample.

[0030] Compared with the prior art, the present invention has the following advantages and technical effects:

[0031] The device for simulating seepage erosion of fractured rock mass in geothermal environment provided by the present invention can realize the seepage erosion of single fractured rock in the process of geothermal exploitation in abandoned mines, and has the characteristics of simple operation, low cost and visualization. The present invention includes multiple modules such as power drive, seepage erosion test, temperature maintenance, information collection and analysis, and can realize rock seepage test under a certain temperature field, which is suitable for shallow geothermal energy exploitation. At the same time, the process of seepage erosion can be clearly and intuitively seen, thereby capturing the process information of seepage erosion.

[0032] The invention can obtain fissure erosion morphology figures under different hydraulic pressures and fissure erosion morphology figures under different temperatures, has stable seepage erosion, is simple to operate, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a schematic diagram of the device for simulating seepage erosion of fractured rock mass in geothermal environment according to the present invention;

[0035] Figure 2 It is a structural schematic diagram of the seepage erosion device of the present invention;

[0036] Figure 3 It is a schematic diagram of the internal structure of the seepage erosion device of the present invention;

[0037] Figure 4 It is a structural schematic diagram of the acrylic perspective board of the present invention;

[0038] In the figure: 1. Seepage erosion device; 2. High-speed camera; 3. Fracture specimen; 4. Air compressor; 5. Sealed water tank 1; 6. Pressure gauge 1; 7. Pressure gauge 2; 8. Flow meter; 9. Annular insulation chamber; 10. Temperature-controlled heating rod; 11. Sealed water tank 2; 12. Filter; 13. Water tank; 14. Weighing platform 1; 15. Weighing platform 2; 101. Rear limit plate; 102. Side limit plate; 103. Top limit permeable plate; 104. Bottom limit permeable plate; 105. Front limit plate; 106. Acrylic perspective plate; 107. Pad; 1051. Observation port. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0040] like Figures 1 to 4 As shown, the present invention provides a device for simulating seepage erosion of fractured rock mass in a geothermal environment, comprising:

[0041] Seepage erosion test module: The seepage erosion test module is used to simulate the evolution of crack morphology during seepage erosion and obtain information on the seepage erosion process;

[0042] A power driving module, the power driving module is used to supply the seepage erosion test module with fluids for seepage erosion at different pressures;

[0043] A temperature maintaining module, which is arranged at the periphery of the seepage erosion test module and is used to heat and keep the seepage erosion test module warm;

[0044] The information collection and analysis module is used to obtain the erosion mass of the fracture sample 3 in the seepage erosion test module and calculate the erosion rate.

[0045] According to a further optimized solution, the seepage erosion test module includes a seepage erosion device 1 equipped with a crack sample 3 and a high-speed camera 2 for obtaining information on the seepage erosion process. The wall panel of the seepage erosion device 1 facing the high-speed camera 2 is a transparent structure; the power drive module is connected to the water inlet of the seepage erosion device 1 through a pipeline, the information collection and analysis module is connected to the water outlet of the seepage erosion device 1 through a pipeline, and the inner wall of the temperature maintenance module is in contact with the seepage erosion device 1.

[0046] A further optimized solution is that the seepage erosion device 1 is a hollow rectangular columnar structure, and the seepage erosion device 1 includes a rear limit plate 101 and a front limit plate 105, and two lateral limit plates 102, a top limit water-permeable plate 103 and a bottom limit water-permeable plate 104 are arranged between the rear limit plate 101 and the front limit plate 105, and the two ends of the two lateral limit plates 102, the top limit water-permeable plate 103 and the bottom limit water-permeable plate 104 are respectively detachably connected to the rear limit plate 101 and the front limit plate 105; two pads 107 are arranged between the two lateral limit plates 102, and the two pads 107 are respectively fixed to the two lateral limit plates 102 by bolts, and the crack sample 3 is fixedly connected to the opposite side of the pad 107, and a self-made crack is formed between the crack samples 3 on the two pads 107, and the width of the self-made crack is controlled About 2mm; the water inlet of the seepage erosion device 1 is arranged on the top limiting permeable plate 103, and the water outlet of the seepage erosion device 1 is arranged on the bottom limiting permeable plate 104, and the water inlet and the water outlet are arranged corresponding to the self-made cracks, and the inner diameters of the water inlet and the water outlet are larger than the width of the self-made cracks, and slightly smaller than the distance between the outermost boundaries of the two rock samples; an observation port 1051 is opened in the middle of the front limiting plate 105, and the observation port 1051 is arranged corresponding to the crack sample 3, and the observation port 1051 is arranged corresponding to the high-speed camera 2; an acrylic perspective plate 106 is arranged between the front limiting plate 105 and the crack sample 3, and the left and right ends of the acrylic perspective plate 106 are respectively in contact with the two lateral limiting plates 102, and the upper and lower ends of the acrylic perspective plate 106 are respectively in contact with the top limiting permeable plate 103 and the bottom limiting permeable plate 104.

[0047] To further optimize the solution, the power drive module includes:

[0048] An air compressor 4, on which a pressure gauge 6 for detecting the internal pressure of the air compressor 4 is installed;

[0049] A sealed water tank 5, an air outlet of the air compressor 4 is connected with the air inlet at the top of the sealed water tank 5, a pressure gauge 7 for detecting the internal pressure of the sealed water tank 5 is installed at the top of the sealed water tank 5, and the water outlet of the sealed water tank 5 is connected with the water inlet of the seepage erosion device 1; valves are installed at the air inlet and water outlet of the sealed water tank 5, and a flow meter 8 is installed on the pipeline between the sealed water tank 5 and the seepage erosion device 1.

[0050] A further optimized solution is that the temperature maintaining module includes an annular insulation bin 9 which is covered on the periphery of the seepage erosion device 1, the inner wall of the annular insulation bin 9 is in contact with the outer wall of the seepage erosion device 1, the material of the annular insulation bin 9 is high temperature resistant glass, a slot for placing the temperature control heating rod 10 is provided on the top of the annular insulation bin 9, and the interior of the annular insulation bin 9 is filled with a heat conducting medium.

[0051] To further optimize the solution, the information collection and analysis modules include:

[0052] A sealed water tank 11 is provided with a filter 12 in the sealed water tank 11. The water outlet of the seepage erosion device 1 is connected with the water inlet of the sealed water tank 11 through a pipeline. The water inlet and the water outlet of the sealed water tank 11 are respectively provided on both sides of the filter 12.

[0053] A water tank 13, the water tank 13 is located below the sealed water tank, and the water outlet of the sealed water tank 11 is connected to the water tank 13 through a pipeline;

[0054] A weighing platform 14 and a sealed water tank 2 11 are arranged on the top of the weighing platform 14;

[0055] The second weighing platform 15, the water tank 13 is arranged on the top of the second weighing platform 15;

[0056] The computer terminal, weighing platform 1 14 and weighing platform 2 15 are all electrically connected to the computer terminal.

[0057] To further optimize the solution, the information collection and analysis module also includes:

[0058] The support frame has a pulley installed at the bottom thereof, and the support frame is a layered structure. The seepage erosion device 1 is arranged at the topmost layer of the support frame, the sealed water tank 11 and the weighing platform 1 14 are arranged at the second topmost layer of the support frame, and the water tank 13 and the weighing platform 15 are arranged at the bottommost layer of the support frame.

[0059] The present invention uses a test method using a device that simulates seepage erosion of fractured rock mass in a geothermal environment, and specifically comprises the following steps:

[0060] S1, assembling a device for simulating seepage erosion of fractured rock mass in a geothermal environment, and placing a fracture sample 3 in the seepage erosion device 1;

[0061] S2, turn on the power of the air compressor 4, observe the internal pressure of the air compressor 4 by the pressure gauge 6, and when the internal pressure of the air compressor 4 reaches the preset pressure, open the inlet switch of the sealed water tank 5;

[0062] S3, observe the internal pressure of the sealed water tank 1 5 by the pressure gauge 2 7, and when the internal pressure of the sealed water tank 1 5 reaches the preset water pressure, open the outlet switch of the sealed water tank 1 5;

[0063] S4, using the temperature control heating rod 10 to heat the annular heat preservation chamber 9 to the required temperature, and continue heating to keep it at the current temperature;

[0064] S5. Turn on the water inlet and outlet switches of the seepage erosion device 1 to conduct a seepage erosion test. At the same time, turn on the high-speed camera 2 to record the erosion morphology, record the weighing data of the two weighing platforms, and calculate the erosion mass based on the weighing data to obtain the erosion rate of the fracture sample 3.

[0065] Among them, the calculation method of erosion quality is as follows:

[0066] After seepage erosion occurs, the water flow will first enter the sealed water tank 11 filled with water. The weakly cemented particles eroded will remain in the sealed water tank 11 under the action of the filter 12, and the excess water will flow into the water tank 13 through the hose, and will be weighed by the high-precision weighing platform 14 placed under the sealed water tank 11, and the erosion mass will be calculated by combining the algorithm.

[0067] Before the test, the two weighing platforms were reset to zero and then measured. The mass of the sealed water tank 11 full of water is m 1 The average density and water density of the weakly cemented rock sample are ρ e and ρ w The weight of the sealed water tank filled with water is the increment of water displaced by the weakly cemented rock sample. The mass of the weakly cemented rock sample eroded m e It can be expressed as In order to quantitatively characterize the effect of seepage erosion, the concept of erosion rate Ψ can be introduced, which is defined as the erosion mass m e With the original mass m r The ratio of

[0068] The above are only preferred specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed in the present application should be covered within the protection scope of the present application.

Claims

1. A device for simulating seepage erosion of fractured rock mass in a geothermal environment, characterized in that: include: A seepage erosion test module, which is used to simulate the evolution of crack morphology during the seepage erosion process and obtain information on the seepage erosion process; A power driving module, the power driving module is used to supply the seepage erosion test module with fluids for seepage erosion at different pressures; A temperature maintaining module, which is arranged at the periphery of the seepage erosion test module and is used to heat and keep the seepage erosion test module warm; An information collection and analysis module, wherein the information collection and analysis module is used to obtain the erosion mass of the fracture sample (3) in the seepage erosion test module and calculate the erosion rate.

2. The device for simulating seepage erosion of fractured rock mass under geothermal environment according to claim 1, characterized in that: The seepage erosion test module comprises a seepage erosion device (1) equipped with a crack sample (3) and a high-speed camera (2) for obtaining information on the seepage erosion process, wherein the wall panel of the seepage erosion device (1) facing the high-speed camera (2) is a transparent structure; the power drive module is connected to the water inlet of the seepage erosion device (1) through a pipeline, the information collection and analysis module is connected to the water outlet of the seepage erosion device (1) through a pipeline, and the inner wall of the temperature maintenance module is in contact with the seepage erosion device (1).

3. The device for simulating seepage erosion of fractured rock mass under geothermal environment according to claim 2, characterized in that: The seepage erosion device (1) is a hollow rectangular columnar structure, comprising a rear limit plate (101) and a front limit plate (105), two lateral limit plates (102), a top limit water permeable plate (103) and a bottom limit water permeable plate (104) are arranged between the rear limit plate (101) and the front limit plate (105), and the two lateral limit plates (102), the top limit water permeable plate (103) and the bottom limit water permeable plate (104) are arranged between the rear limit plate (101) and the front limit plate (105). ) and the two ends of the bottom limit permeable plate (104) are detachably connected to the rear limit plate (101) and the front limit plate (105); two pads (107) are arranged between the two lateral limit plates (102); the two pads (107) are respectively fixed to the two lateral limit plates (102) by bolts; the crack specimen (3) is fixedly connected to the opposite side of the pads (107); the two pads (107) are fixedly connected to the opposite side of the pads (107); A self-made crack is formed between the crack samples (3); the water inlet of the seepage erosion device (1) is arranged on the top limit water-permeable plate (103), and the water outlet of the seepage erosion device (1) is arranged on the bottom limit water-permeable plate (104), and the water inlet and the water outlet are arranged corresponding to the self-made crack; an observation port (1051) is opened in the middle of the front limit plate (105), and the observation port (1051) is arranged corresponding to the crack sample (3), and the The observation port (1051) is arranged corresponding to the high-speed camera (2); an acrylic perspective plate (106) is arranged between the front limit plate (105) and the crack sample (3); the left and right ends of the acrylic perspective plate (106) are respectively in contact with the two lateral limit plates (102); the upper and lower ends of the acrylic perspective plate (106) are respectively in contact with the top limit water-permeable plate (103) and the bottom limit water-permeable plate (104).

4. The device for simulating seepage erosion of fractured rock mass under geothermal environment according to claim 2, characterized in that: The power drive module comprises: An air compressor (4), wherein the air compressor (4) is provided with a pressure gauge (6) for detecting the internal pressure of the air compressor (4); A sealed water tank (5), the air outlet of the air compressor (4) is connected to the air inlet at the top of the sealed water tank (5), a pressure gauge (7) for detecting the internal pressure of the sealed water tank (5) is installed at the top of the sealed water tank (5), the water outlet of the sealed water tank (5) is connected to the water inlet of the seepage erosion device (1); valves are installed at the air inlet and water outlet of the sealed water tank (5), and a flow meter (8) is installed on the pipeline between the sealed water tank (5) and the seepage erosion device (1).

5. The device for simulating seepage erosion of fractured rock mass under geothermal environment according to claim 2, characterized in that: The temperature maintaining module comprises an annular heat preservation chamber (9) which is arranged on the periphery of the seepage erosion device (1); the inner wall of the annular heat preservation chamber (9) is in contact with the outer wall of the seepage erosion device (1); the material of the annular heat preservation chamber (9) is high temperature resistant glass; a slot for placing a temperature control heating rod (10) is provided on the top of the annular heat preservation chamber (9); and the interior of the annular heat preservation chamber (9) is filled with a heat conducting medium.

6. The device for simulating seepage erosion of fractured rock mass under geothermal environment according to claim 2, characterized in that: The information collection and analysis module includes: A sealed water tank (11), wherein a filter (12) is arranged in the sealed water tank (11), the water outlet of the seepage erosion device (1) is connected to the water inlet of the sealed water tank (11) through a pipeline, and the water inlet and the water outlet of the sealed water tank (11) are respectively arranged on both sides of the filter (12); A water storage tank (13), the water storage tank (13) is located below the sealed water tank, and the water outlet of the sealed water tank 2 (11) is connected to the water storage tank (13) through a pipeline; A weighing platform (14), wherein the sealed water tank (11) is arranged on the top of the weighing platform (14); A second weighing platform (15), wherein the water tank (13) is arranged on the top of the second weighing platform (15); The computer terminal, the weighing platform 1 (14) and the weighing platform 2 (15) are both electrically connected to the computer terminal.

7. The device for simulating seepage erosion of fractured rock mass under geothermal environment according to claim 6, characterized in that: The information collection and analysis module also includes: A support frame, a pulley is installed at the bottom of the support frame, the support frame is a layered structure, the seepage erosion device (1) is arranged on the top layer of the support frame, the sealed water tank (2) (11) and the weighing platform (14) are arranged on the second top layer of the support frame, and the water tank (13) and the weighing platform (2) (15) are arranged on the bottom layer of the support frame.

8. A method for simulating seepage erosion of fractured rock mass in a geothermal environment, characterized in that: The device for simulating seepage erosion of fractured rock mass in geothermal environment according to any one of claims 1 to 7 specifically comprises the following steps: S1. Assembling a device for simulating seepage erosion of fractured rock mass in a geothermal environment, and placing a fractured sample (3) in the seepage erosion device (1); S2, turning on the power supply of the air compressor (4), observing the internal pressure of the air compressor (4) by means of the pressure gauge 1 (6), and when the internal pressure of the air compressor (4) reaches a preset pressure, opening the inlet switch of the sealed water tank 1 (5); S3, using the pressure gauge 2 (7) to observe the internal pressure of the sealed water tank 1 (5), and when the internal pressure of the sealed water tank 1 (5) reaches a preset water pressure, opening the outlet switch of the sealed water tank 1 (5); S4, using the temperature control heating rod (10) to heat the annular heat preservation chamber (9) to a required temperature, and continue heating to keep it at the current temperature; S5. Turn on the water inlet and outlet switches of the seepage erosion device (1) to conduct a seepage erosion test. At the same time, turn on the high-speed camera (2) to record the erosion morphology, record the weighing data of the two weighing platforms, and calculate the erosion mass based on the weighing data to obtain the erosion rate of the fracture sample (3).

Images