A simulation test device for the influence of shale gas exploitation induced earthquake on buildings

Abstract

The present application relates to a kind of shale gas exploitation induced earthquake simulation test device for simulating the influence of building, belong to shale gas exploitation field.It includes: simulation container, multiple hydraulic machines, fault pad, simulated fault, rock-soil layer, simulated borehole pipe, simulated shale gas layer, surface soil and control mechanism;The hydraulic machine is arranged below the simulation container, the fault pad is arranged above the hydraulic machine, the simulated fault is arranged above the fault pad, the rock-soil layer and the simulated shale gas layer are arranged above the simulated fault, the simulated shale gas layer is arranged in the middle of the rock-soil layer, the surface soil is arranged above the rock-soil layer, the simulated borehole pipe passes through the lateral wall of the simulation container, and is connected with the simulated shale gas layer.The present application is beneficial to the physical model test of shale gas exploitation process, simulates the influence of fault sliding on the earthquake caused by shale gas exploitation and the influence of building on the earthquake induced by shale gas exploitation.

Description

Technical Field

[0001] This invention relates to the field of shale gas extraction, and more particularly to a simulation test device for the impact of earthquakes induced by shale gas extraction on buildings. Background Technology

[0002] Shale gas refers to commercially valuable biogenic, pyrogenic, or mixed-origin natural gas stored in mature, organic-rich dark mudstone or high-carbon mudstone due to organic matter adsorption or the presence of fractures and matrix pores. During shale gas fracturing, the seismic impacts caused by controlling factors such as fluid injection rate and pressure vary. Therefore, to better assess the impact of shale gas extraction on regional seismic safety, it is necessary to combine research on the interrelationships between fracturing and tectonic seismic induction factors, conduct research on the main controlling factors and seismic characteristics of shale gas extraction areas, accurately identify earthquake types, and clarify the potential impacts of earthquakes on buildings, thereby providing technical support for the construction and safe operation of major engineering projects.

[0003] Currently, most studies on hydraulic fracturing processes in shale gas extraction rely on numerical simulations, including 3D geospatial modeling, hydraulic fracturing modeling, and reservoir numerical simulation. There are relatively few existing physical experimental models for hydraulic fracturing in shale gas extraction. Existing equipment cannot simulate the impact of earthquakes caused by shale gas extraction on buildings, nor can it simulate the effect of fault slippage on vibrations caused by shale gas extraction. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a simulation test device for the impact of shale gas extraction-induced earthquakes on buildings, so as to solve the above-mentioned problem.

[0005] The technical solution of this invention to solve the above-mentioned technical problems is as follows: A simulation test device for the impact of shale gas extraction-induced earthquakes on buildings, comprising: a simulation container, multiple hydraulic presses, a fault pad, a simulated fault, a soil and rock layer, a simulated borehole pipe, a simulated shale gas layer, surface soil, and a control mechanism; the hydraulic presses are disposed below the simulation container, the fault pad is disposed above the hydraulic presses, the simulated fault is disposed above the fault pad, the soil and rock layer and the simulated shale gas layer are disposed above the simulated fault, the simulated shale gas layer is disposed in the middle of the soil and rock layer, the surface soil is disposed above the soil and rock layer, the simulated borehole pipe passes through the side wall of the simulation container and is connected to the simulated shale gas layer, the fault pad, the simulated fault, the soil and rock layer, the simulated shale gas layer, and the surface soil are all disposed in the simulation container; a triaxial accelerometer and multiple simulated buildings are disposed at the top of the surface soil, and the triaxial accelerometer and the hydraulic presses are connected to the control mechanism.

[0006] The beneficial effects of this invention are: by simulating the structure of shale gas extraction and setting up triaxial acceleration sensors and simulated buildings on the surface soil, it is beneficial to simulate and study the impact of earthquakes caused by shale gas extraction on buildings; at the same time, the fault pad combined with the hydraulic press is beneficial to simulate and study the impact of fault slippage on earthquakes caused by shale gas extraction, thus making up for the problem that the test devices in the prior art cannot perform physical simulation.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the simulated container includes: a metal shell, glass side panels, and multiple support columns. The metal shell and the glass side panels are wound around each other to form a tubular structure, and the support columns are disposed at the bottom ends of the metal shell and the glass side panels.

[0009] The advantages of adopting the above-mentioned further scheme are: the metal shell and glass side plate are conducive to fixing the simulated strata, and the glass side plate is conducive to the experimenters observing the experimental phenomena.

[0010] Furthermore, the fault pad includes an upper fault pad and a lower fault pad, which abut against each other. The upper fault pad and the lower fault pad are disposed at the top of the support column and abut against the bottom inner wall of the metal shell and the glass side plate.

[0011] The beneficial effects of adopting the above-mentioned further scheme are: the fault upper plate and the fault lower plate are conducive to the lifting of the simulated fault under the jacking action of the hydraulic press, thereby realizing the simulation of fault slip, and thus facilitating the simulation study of the impact of fault slip on the seismic impact of shale gas extraction.

[0012] Furthermore, the simulated fault includes a simulated fault hanging wall and a simulated fault footwall, which abut against each other, and the simulated fault hanging wall and the simulated fault footwall are respectively disposed above the fault hanging wall pad and the fault footwall pad.

[0013] The beneficial effects of adopting the above-mentioned further scheme are: simulating the hanging wall and footwall of the fault facilitates the realization of misalignment under the jacking action of the hanging wall pad and footwall pad, thereby simulating fault slip.

[0014] Furthermore, the contact angle between the simulated fault hanging wall and the simulated fault footwall is between -90 degrees and 90 degrees.

[0015] The beneficial effect of adopting the above-mentioned further scheme is that it is conducive to simulating fault slip at different angles according to experimental requirements, thereby improving the applicability of the experiment.

[0016] Furthermore, the soil and rock layer includes an upper soil and rock body and a lower soil and rock body. The upper soil and rock body and the lower soil and rock body are respectively arranged at the upper and lower ends of the simulated shale gas layer. The lower soil and rock body is arranged above the simulated fault, and the surface soil is arranged above the upper soil and rock body.

[0017] The beneficial effects of adopting the above-mentioned further scheme are: it helps to simulate the soil and rock layers in the actual underlying structure, and improves the reliability and accuracy of the experiment.

[0018] Furthermore, the simulated shale gas layer includes: shale simulation material, drilling holes, a hydraulic fracturing device, multiple perforations, and a packer; the drilling holes are blind holes set on the sidewall of the shale simulation material, the simulated drill pipe is inserted into the drilling holes, the hydraulic fracturing device passes through the simulated drill pipe and is inserted into the drilling holes, the multiple perforations are through holes surrounding the hydraulic fracturing device at the end away from the simulated drill pipe, and the packer is sleeved on the hydraulic fracturing device and is sealed to the outer wall of the hydraulic fracturing device and the inner wall of the drilling holes.

[0019] The beneficial effects of adopting the above-mentioned further scheme are: the simulated borehole pipe and borehole are conducive to simulating the drilling and extraction structure of shale gas; the hydraulic fracturing device, together with the perforation and the external pressurizer, is conducive to using fracturing fluid to pressurize the shale simulation material, thereby simulating the phenomenon of pressure-induced fractures during the extraction of shale gas; and the packer is conducive to preventing gas from escaping from the shale simulation material.

[0020] Furthermore, the shale simulation material uses river sand and C in a ratio of 8:3:7:0.08. 20 The shale simulation material is made by mixing silicate cement, gypsum, and glycerin with water, and the pores inside the material contain gas.

[0021] The beneficial effect of adopting the above-mentioned further scheme is that it helps to create pores inside the shale simulation material and retain the gas in the pores, thereby simulating the shale gas present in the shale gas layer.

[0022] Furthermore, a simulated river valley is also provided at the top of the surface soil.

[0023] The beneficial effect of adopting the above-mentioned further scheme is that it helps to analyze the impact of earthquakes caused by hydraulic fracturing during shale gas extraction on the topography of rivers and valleys on the surface. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure provided in an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of a simulated shale gas reservoir structure provided in an embodiment of the present invention.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1. Simulated container; 2. Hydraulic press; 3. Fault pad; 4. Simulated fault; 5. Soil and rock layer; 6. Simulated borehole pipe; 7. Simulated shale gas layer; 8. Topsoil; 11. Metal shell; 12. Glass side plate; 13. Support column; 31. Fault upper plate; 32. Fault lower plate; 41. Simulated fault upper plate; 42. Simulated fault lower plate; 51. Upper soil and rock layer; 52. Lower soil and rock layer; 71. Simulated shale material; 72. Drill hole; 73. Hydraulic fracturing device; 74. Perforation; 75. Packer; 81. Triaxial accelerometer; 82. Simulated building; 83. Simulated valley. Detailed Implementation

[0028] The principles and features of the present invention are described below. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0029] like Figure 1 As shown, a simulation test device for the impact of shale gas extraction-induced earthquakes on buildings includes: a simulation container 1, multiple hydraulic presses 2, a fault pad 3, a simulated fault 4, a soil and rock layer 5, a simulated borehole pipe 6, a simulated shale gas layer 7, surface soil 8, and a control mechanism; the hydraulic presses 2 are located below the simulation container 1, the fault pad 3 is located above the hydraulic presses 2, the simulated fault 4 is located above the fault pad 3, the soil and rock layer 5 and the simulated shale gas layer 7 are located above the simulated fault 4, and the simulated shale gas layer... 7 is located in the middle of the soil and rock layer 5, and the surface soil 8 is located above the soil and rock layer 5. The simulated borehole pipe 6 passes through the side wall of the simulated container 1 and is connected to the simulated shale gas layer 7. The fault pad 3, the simulated fault 4, the soil and rock layer 5, the simulated shale gas layer 7, and the surface soil 8 are all located in the simulated container 1. A triaxial acceleration sensor 81 and multiple simulated buildings 82 are provided at the top of the surface soil 8. The triaxial acceleration sensor 81 and the hydraulic press 2 are connected to the control mechanism.

[0030] It should be noted that, in the technical solution of the present invention, the material and thickness of the simulated fault 4, the soil and rock layer 5, the simulated shale gas layer 7 and the surface soil 8 need to be adjusted according to the actual simulated geological environment.

[0031] The beneficial effects of this invention are: by simulating the structure of shale gas extraction and setting up triaxial acceleration sensors and simulated buildings on the surface soil, it is beneficial to simulate and study the impact of earthquakes caused by shale gas extraction on buildings; at the same time, the fault pad combined with the hydraulic press is beneficial to simulate and study the impact of fault slippage on earthquakes caused by shale gas extraction, thus making up for the problem that the test devices in the prior art cannot perform physical simulation.

[0032] Preferred, such as Figure 1 As shown, the simulated container 1 includes: a metal shell 11, a glass side plate 12 and a plurality of support columns 13. The metal shell 11 and the glass side plate 12 are wound together to form a tubular structure, and the support columns 13 are disposed at the bottom ends of the metal shell 11 and the glass side plate 12.

[0033] It should be noted that, in a preferred embodiment of the present invention, the glass side plate 12 is connected to the metal shell 11 by glass glue, thereby ensuring the airtightness of the tubular structure formed by the metal shell 11 and the glass side plate 12.

[0034] The simulated drill pipe 6 is welded to the metal outer shell 11.

[0035] The advantages of adopting the above-mentioned preferred scheme are: the metal shell and glass side plate are conducive to fixing the simulated strata, and the glass side plate is conducive to the experimenters observing the experimental phenomena.

[0036] Preferred, such as Figure 1 As shown, the fault pad 3 includes an upper fault pad 31 and a lower fault pad 32. The upper fault pad 31 and the lower fault pad 32 abut against each other. The upper fault pad 31 and the lower fault pad 32 are disposed at the top of the support column 13 and abut against the bottom inner wall of the metal shell 11 and the glass side plate 12.

[0037] The advantages of adopting the above-mentioned preferred scheme are: the upper and lower plate of the fault are conducive to the lifting of the simulated fault under the jacking action of the hydraulic press, thereby realizing the simulation of fault sliding, and thus facilitating the simulation study of the impact of fault sliding on the earthquake caused by shale gas extraction.

[0038] Preferred, such as Figure 1 As shown, the simulated fault 4 includes a simulated fault hanging wall 41 and a simulated fault footwall 42. The simulated fault hanging wall 41 and the simulated fault footwall 42 abut against each other. The simulated fault hanging wall 41 and the simulated fault footwall 42 are respectively arranged above the fault hanging wall pad 31 and the fault footwall pad 32.

[0039] It should be noted that, in a preferred embodiment of the present invention, the simulated fault upper plate 41 and the simulated fault lower plate 42 are made of waterproof and airproof materials.

[0040] The advantages of adopting the above-mentioned preferred scheme are: simulating the hanging wall and footwall of the fault facilitates the realization of misalignment under the jacking action of the hanging wall pad and footwall pad, thereby simulating fault slip.

[0041] Preferably, the contact angle between the simulated fault hanging wall 41 and the simulated fault footwall 42 is between -90 degrees and 90 degrees.

[0042] The advantages of adopting the above-mentioned preferred scheme are: it is conducive to simulating fault slip at different angles according to experimental requirements, and improves the applicability of the experiment.

[0043] Preferred, such as Figure 1 As shown, the soil and rock layer 5 includes an upper soil and rock body 51 and a lower soil and rock body 52. ​​The upper and lower ends of the simulated shale gas layer 7 are respectively provided with the upper soil and rock body 51 and the lower soil and rock body 52. ​​The lower soil and rock body 52 is located above the simulated fault 4, and the surface soil body 8 is located above the upper soil and rock body 51.

[0044] The advantages of adopting the above-mentioned preferred scheme are: it helps to simulate the soil and rock layers in the actual underlying structure and improves the reliability and accuracy of the experiment.

[0045] Preferred, such as Figure 2 As shown, the simulated shale gas layer 7 includes: shale simulation material 71, drilling holes 72, hydraulic fracturing unit 73, multiple perforations 74, and packer 75; the drilling holes 72 are blind holes provided on the side wall of the shale simulation material 71, the simulated drill pipe 6 is inserted into the drilling holes 72, the hydraulic fracturing unit 73 passes through the simulated drill pipe 6 and is inserted into the drilling holes 72, the multiple perforations 74 are through holes surrounding the hydraulic fracturing unit 73 at the end away from the simulated drill pipe 6, and the packer 75 is sleeved on the hydraulic fracturing unit 73 and is sealed to the outer wall of the hydraulic fracturing unit 73 and the inner wall of the drilling holes 72.

[0046] It should be noted that, in the technical solution of this invention, the end of the hydraulic fracturing device 73 furthest from the perforation 74 is connected to a pressurizer, thereby pumping fracturing fluid out of the perforation 72, causing the shale simulation material 71 to exhibit the following characteristics: Figure 2 The pressure-induced crack shown.

[0047] The advantages of adopting the above-mentioned preferred scheme are: the simulated borehole pipe and borehole are conducive to simulating the drilling and extraction structure of shale gas; the hydraulic fracturing device, together with the perforation and the external pressurizer, is conducive to using fracturing fluid to pressurize the shale simulation material, thereby simulating the phenomenon of pressure-induced fractures during the extraction of shale gas; and the packer is conducive to preventing gas from escaping from the shale simulation material.

[0048] Preferably, the shale simulation material 71 is made of river sand and C in a ratio of 8:3:7:0.08. 20 The shale simulation material 71 is made by mixing silicate cement, gypsum and glycerin with water, and the pores inside the material contain gas.

[0049] It should be noted that, in the technical solution of the present invention, the shale simulation material 71 does not require vibration treatment when it is made, so that the shale simulation material 71 has pores inside and the gas in the pores is retained. After it is prepared, the shale simulation material 71 is poured into a customized mold for shaping.

[0050] The advantages of adopting the above-mentioned preferred scheme are: it helps to create pores inside the shale simulation material and retain the gas in the pores, thereby simulating the shale gas present in the shale gas layer.

[0051] Preferred, such as Figure 1 As shown, a simulated river valley 83 is also provided at the top of the surface soil 8.

[0052] The advantages of adopting the above-mentioned preferred scheme are: it is helpful to analyze the impact of earthquakes caused by hydraulic fracturing during shale gas extraction on the topography of rivers and valleys on the surface.

[0053] The working process of the present invention will be described below through an embodiment:

[0054] like Figure 1 and Figure 2 As shown, by adjusting the lifting height of the hydraulic press 2, the upper fault plate 31 and the lower fault plate 32 are made flush with the bottom of the metal casing 11. Pure water is added into the simulated valley 83, and the hydraulic fracturing device 73 is connected to a pressurizer to pump the fracturing fluid to the perforation 74 for injection, causing the shale simulation material 71 to exhibit the following characteristics: Figure 2 The hydraulic fracturing is shown. During this process, the readings of the triaxial accelerometer 81 and the settlement and tilt angle of the simulated building 82 are recorded to analyze the impact of hydraulic fracturing-induced earthquakes on the superstructure.

[0055] The lifting height of the hydraulic press 2 is adjusted so that the upper plate 31 of the fault rises higher than the lower plate 32 of the fault, thereby causing a slow slippage between the simulated upper plate 41 and the simulated lower plate 42 of the fault. During this process, the readings of the triaxial accelerometer 81 and the settlement and tilt angle of the simulated structure 82 are recorded to analyze the impact of fault slippage on earthquakes caused by shale gas extraction.

[0056] This invention can perform physical simulation experiments on the impact of shale gas extraction-induced earthquakes on surrounding buildings, achieving a more realistic simulation of the on-site environment compared to numerical simulation experiments.

[0057] This invention enables river and building simulation. Traditional methods only perform numerical simulations and do not consider the state of superstructures and rivers. This invention can simulate the impact of earthquakes caused by shale gas extraction on buildings.

[0058] This invention simulates a strike-slip fault, with simulated shale gas layers set in the upper part of the fault, which can simulate the impact of strike-slip fault sliding on earthquakes caused by shale gas layer mining.

[0059] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 this invention and simplifying the description, and are not intended to 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 this invention.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0061] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0062] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0063] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0064] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A simulation test device for the impact of shale gas extraction-induced earthquakes on buildings, characterized in that, include: The system comprises a simulated container (1), multiple hydraulic presses (2), a fault pad (3), a simulated fault (4), a soil and rock layer (5), a simulated borehole pipe (6), a simulated shale gas layer (7), surface soil (8), and a control mechanism; the hydraulic presses (2) are located below the simulated container (1), the fault pad (3) is located above the hydraulic presses (2), the simulated fault (4) is located above the fault pad (3), and the soil and rock layer (5) and the simulated shale gas layer (7) are located below the simulated container (1). Above the simulated fault (4), the simulated shale gas layer (7) is located in the middle of the soil and rock layer (5), the surface soil (8) is located above the soil and rock layer (5), the simulated borehole pipe (6) passes through the side wall of the simulated container (1) and is connected to the simulated shale gas layer (7), the fault pad (3), the simulated fault (4), the soil and rock layer (5), the simulated shale gas layer (7) and the surface soil (8) are all located in the simulated container (1); The top of the surface soil (8) is provided with a triaxial accelerometer (81) and multiple simulated buildings (82), and the triaxial accelerometer (81) and the hydraulic press (2) are connected to the control mechanism; The simulated shale gas layer (7) includes: shale simulation material (71), borehole (72), hydraulic fracturing device (73), multiple perforations (74), and packer (75); the borehole (72) is a blind hole set on the side wall of the shale simulation material (71), the simulated borehole pipe (6) is inserted into the borehole (72), the hydraulic fracturing device (73) passes through the simulated borehole pipe (6) and is inserted into the borehole (72), the multiple perforations (74) are through holes wrapped around the end of the hydraulic fracturing device (73) away from the simulated borehole pipe (6), and the packer (75) is sleeved on the hydraulic fracturing device (73) and is sealed to the outer wall of the hydraulic fracturing device (73) and the inner wall of the borehole (72).

2. The simulation test device for the impact of shale gas extraction-induced earthquakes on buildings according to claim 1, characterized in that, The simulated container (1) includes a metal shell (11), a glass side plate (12) and a plurality of support columns (13). The metal shell (11) and the glass side plate (12) are wound together to form a tubular structure, and the support columns (13) are disposed at the bottom of the metal shell (11) and the glass side plate (12).

3. The simulation test device for the impact of shale gas extraction-induced earthquakes on buildings according to claim 2, characterized in that, The fault pad (3) includes a fault upper plate pad (31) and a fault lower plate pad (32). The fault upper plate pad (31) and the fault lower plate pad (32) abut against each other. The fault upper plate pad (31) and the fault lower plate pad (32) are disposed at the top of the support column (13) and abut against the bottom inner wall of the metal shell (11) and the glass side plate (12).

4. The simulation test device for the impact of shale gas extraction-induced earthquakes on buildings according to claim 3, characterized in that, The simulated fault (4) includes a simulated fault hanging wall (41) and a simulated fault footwall (42), which abut against each other. The simulated fault hanging wall (41) and the simulated fault footwall (42) are respectively arranged above the fault hanging wall pad (31) and the fault footwall pad (32).

5. The simulation test device for the impact of shale gas extraction-induced earthquakes on buildings according to claim 4, characterized in that, The contact angle between the simulated fault hanging wall (41) and the simulated fault footwall (42) is between -90 degrees and 90 degrees.

6. The simulation test device for the impact of shale gas extraction-induced earthquakes on buildings according to claim 1, characterized in that, The soil and rock layer (5) includes an upper soil and rock body (51) and a lower soil and rock body (52). The upper and lower ends of the simulated shale gas layer (7) are respectively provided with the upper soil and rock body (51) and the lower soil and rock body (52). The lower soil and rock body (52) is located above the simulated fault (4), and the surface soil body (8) is located above the upper soil and rock body (51).

7. The simulation test device for the impact of shale gas extraction-induced earthquakes on buildings according to claim 1, characterized in that, The shale simulation material (71) uses river sand and C in a ratio of 8:3:7:0.

08. 20 The shale simulation material (71) is made by mixing silicate cement, gypsum and glycerin with water, and the pores inside the material contain gas.

8. The simulation test device for the impact of shale gas extraction-induced earthquakes on buildings according to claim 1, characterized in that, A simulated river valley (83) is also provided at the top of the surface soil (8).

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