Grouting reinforcement test device for fault fracture zone

Abstract

The invention relates to the technical field of blocking fault local activation, in particular to a fault fracture zone grouting reinforcement test device. The fault fracture zone grouting reinforcement test device comprises a grouting mold, a grouting pipe and a grouting pipe, wherein a fault fracture zone sample is arranged in the grouting mold; the conveying assembly is provided with a grouting pipe, the grouting pipe penetrates through the fault fracture zone sample, and a plurality of grouting holes are formed in the side wall of the grouting pipe. According to the arrangement, multiple positions of the fault fracture zone sample are grouted at the same time through the multiple grouting holes, the grout contains microorganisms, calcite gel is rapidly separated out among particles of the fault fracture zone through the mineralization effect of the microorganisms, and therefore the physical and mechanical properties of the fault fracture zone are improved. The problems that the upper layer of the fault fracture zone sample is firstly solidified by the grout, the grout cannot flow to the lower layer, or the grout accelerates to flow due to self weight, grouting is uneven, solidification is incomplete and the like are solved, and the grouting uniformity is guaranteed.

Description

[0001] This application is a divisional application. The original application invention name is "A fault fracture zone grouting reinforcement test device", the application number is 202210867471.7, and the application date is July 22, 2022. Technical Field

[0002] The present application relates to the technical field of blocking local activation of faults, and more specifically, to a fault fracture zone grouting reinforcement test device. Background Art

[0003] Fault reactivation occurs when a fault is disturbed by excavation, resulting in redistributed shear stress exceeding the fault's shear strength, leading to relative displacement of the two sides of the fault, accompanied by a massive release of energy. Fault reactivation significantly impacts dynamic hazards such as floor water inrush, rock bursts, roof collapse, rockbursts, and gas accidents. To date, research and prevention efforts on fault reactivation have primarily focused on microseismic monitoring, numerical simulation, similarity modeling, real-time monitoring, and the placement of protective pillars. Grouting techniques using cement and chemical slurries are often used to reinforce and block water in weak zones such as fault fracture zones during the excavation of shafts, tunnels, and chambers. However, existing grouting materials suffer from limitations such as poor durability, environmental impact, and high cost. Biomaterials, by contrast, offer simpler reaction conditions, fewer negative impacts, and improved compatibility. They face fewer application restrictions and are more environmentally friendly, economical, and reliable.

[0004] Microbial-induced mineralization grouting reinforcement technology injects bacterial solution and nutrients into broken rock and soil particles. The microbial mineralization process rapidly precipitates calcite gel between sand particles, improving the physical and mechanical properties of the soil. Microbial grouting reinforcement technology offers advantages such as minimal construction disturbance, low grouting pressure, and environmental benefits. It can significantly improve soil strength, stiffness, and liquefaction resistance, and has a wide range of applications.

[0005] However, existing microbial grouting reinforcement technologies mostly employ a grouting method where the solution is injected from the upper end and discharged from the lower end. This can easily lead to the upper layer being consolidated first, preventing the microbial-induced mineralization solution from flowing to the lower layer, or the solution accelerating due to its own weight, resulting in uneven grouting and incomplete consolidation. Furthermore, there are currently no reports on research on microbial-induced mineralization reinforcement technology for fault fracture zones under high-stress conditions. Therefore, studying the microbial-induced reinforcement mechanism of high-stress fault fracture zones based on indoor grouting experiments has extremely important engineering value.

[0006] Therefore, it is necessary to propose a fault fracture zone grouting reinforcement test device to at least partially solve the problems existing in the prior art. Summary of the Invention

[0007] The Summary of the Invention introduces a series of simplified concepts that will be further described in the Detailed Description of the Invention. The Summary of the Invention is not intended to limit the key features and essential features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0008] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0009] To this end, the present invention provides a fault fracture zone grouting reinforcement test device.

[0010] In view of this, according to an embodiment of the present application, a fault fracture zone grouting reinforcement test device is proposed, comprising:

[0011] A grouting mold, wherein a fault fracture zone sample is arranged in the grouting mold;

[0012] The conveying component is provided with a grouting pipe, the grouting pipe runs through the fault fracture zone sample, and a plurality of grouting holes are opened on the side wall of the grouting pipe.

[0013] In a feasible embodiment, the grouting mold includes:

[0014] a housing, wherein the housing is provided with an air inlet;

[0015] A rubber sleeve is arranged in the shell, and the fault fracture zone sample is arranged in the rubber sleeve;

[0016] A plug body is used to block the port of the rubber sleeve, and the plug body is provided with a through hole; the grouting pipe passes through the rubber sleeve through the through hole;

[0017] Wherein, a pressurized air bag is formed between the shell and the rubber sleeve.

[0018] In a feasible embodiment, the fault fracture zone sample is composed of breccia, crushed stone, debris and fault gouge.

[0019] In a feasible embodiment, the fault fracture zone grouting reinforcement test device further includes:

[0020] The filter screen is sleeved on the grouting pipe and is located outside the grouting hole.

[0021] In a feasible embodiment, the grouting pipe is made of stainless steel, the diameter of the grouting hole is less than or equal to 2 mm, and the distance between adjacent grouting holes is 0.5 mm to 0.7 mm.

[0022] In a feasible embodiment, the fault fracture zone grouting reinforcement test device further includes:

[0023] a collecting assembly connected to the grouting pipe and used to collect slurry flowing through the fault fracture zone sample;

[0024] a first detection component connected to the conveying component and used to detect parameters of the slurry in the conveying component;

[0025] a second detection component connected to the collecting component and configured to detect parameters of the slurry in the collecting component;

[0026] Wherein, the parameters are pH, conductivity, pressure, flow rate and weight of the slurry.

[0027] In a feasible embodiment, the conveying assembly includes:

[0028] a first liquid reservoir;

[0029] a first delivery pipe connected to the first liquid reservoir, and the grouting pipe connected to the first delivery pipe;

[0030] a first three-way valve, wherein a first passage of the first three-way valve is connected to the first delivery pipe, and a second passage of the first three-way valve is connected to the grouting pipe;

[0031] a second delivery pipe connected to the third passage of the first three-way valve;

[0032] a first valve, disposed on the first delivery pipe;

[0033] a pump body, provided on the first delivery pipe and located between the first valve and the first three-way valve;

[0034] a second valve, provided on the first delivery pipe, between the pump body and the first three-way valve;

[0035] The third valve is arranged on the second delivery pipe.

[0036] In a feasible embodiment, the collection component includes:

[0037] a second three-way valve, wherein a fourth passage of the second three-way valve is connected to the grouting pipe;

[0038] a first collecting pipe connected to the fifth passage of the second three-way valve;

[0039] a second collecting pipe connected to the sixth passage of the second three-way valve;

[0040] a fourth valve, disposed on the second collecting pipe;

[0041] a fifth valve, disposed on the first collecting pipe;

[0042] The second liquid reservoir is connected to the first collecting tube.

[0043] In a feasible embodiment, the first detection component includes:

[0044] a first pH tester connected to the first liquid reservoir;

[0045] a first conductivity meter connected to the first liquid reservoir;

[0046] a first balance, wherein the first liquid reservoir is connected to the first balance;

[0047] a first flow meter, disposed on the first delivery pipe and located between the pump body and the second valve;

[0048] The first pressure gauge is arranged at the port of the second delivery pipe.

[0049] In a feasible implementation manner, the second detection component includes:

[0050] a second pH tester connected to the second liquid reservoir;

[0051] a second conductivity meter connected to the second liquid reservoir;

[0052] a second balance, the second liquid reservoir being connected to the second balance;

[0053] a second flow meter, disposed on the first collecting pipe and located between the second liquid reservoir and the fifth valve;

[0054] The second pressure gauge is arranged at the port of the second collecting pipe.

[0055] Compared with the prior art, the present invention has at least the following beneficial effects: the fault fracture zone grouting reinforcement test device provided in the embodiment of the present application is provided with a grouting mold and a conveying assembly, wherein the grouting mold is provided with a fault fracture zone sample, and the conveying assembly conveys a slurry containing microorganisms to the grouting mold, so as to utilize the microbial mineralization to quickly precipitate calcite gel between the particles of the fault fracture zone, thereby improving the physical and mechanical properties of the fault fracture zone. In addition, a plurality of grouting holes are opened on the side wall of the grouting pipe, and the fault fracture zone sample is grouted simultaneously at multiple locations through the plurality of grouting holes, thereby avoiding the upper layer of the fault fracture zone sample being solidified by the slurry first, and the slurry cannot flow to the lower layer, or the slurry is accelerated due to its own weight, resulting in uneven grouting, incomplete consolidation and other problems. By observing the consolidation speed and consolidation uniformity of the sample, the grouting position and the position and number of the grouting holes are adjusted, thereby ensuring the actual grouting uniformity of the fault fracture zone according to the test and ensuring the comprehensive consolidation of the fault fracture zone.

[0056] The following description will embody, and part of it will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present description. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0058] Figure 1 A schematic structural diagram of a fault fracture zone grouting reinforcement test device provided in an embodiment of the present application;

[0059] Figure 2 A schematic structural diagram of a grouting pipe provided in this application;

[0060] Figure 3 This is a schematic structural diagram of the shell of a grouting mold provided in this application.

[0061] in, Figures 1 to 3 The corresponding relationship between the reference numerals and component names is as follows:

[0062] 110 grouting mold, 111 shell, 112 rubber sleeve, 113 plug body, 114 pressurized air bag, 115 air inlet, 120 delivery assembly, 121 grouting pipe, 1211 grouting hole, 122 first liquid reservoir, 123 first delivery pipe, 124 first three-way valve, 125 second delivery pipe, 126 first valve, 127 pump body, 128 second valve, 129 third valve, 130 collection assembly, 131 second three-way valve, 132 first collecting tube, 133 second collecting tube, 134 fourth valve, 135 fifth valve, 136 second liquid reservoir, 141 first pH tester, 142 first conductivity meter, 143 first balance, 144 first flow meter, 145 first pressure gauge, 151 second pH tester, 152 second conductivity meter, 153 second balance, 154 second flow meter, 155 second pressure gauge, 160 fault fracture zone sample. DETAILED DESCRIPTION

[0063] In order to better understand the above technical solution, the technical solution of the embodiment of the present application is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiment of the present application and the specific features in the embodiment are detailed descriptions of the technical solution of the embodiment of the present application, rather than limitations on the technical solution of the present application. In the absence of conflict, the embodiment of the present application and the technical features in the embodiment can be combined with each other.

[0064] like Figure 1 and Figure 2As shown, according to an embodiment of the present application, a fault fracture zone grouting reinforcement test device is proposed, including: a grouting mold 110, in which a fault fracture zone sample 160 is arranged; a conveying component 120, in which a grouting pipe 121 is provided, and the grouting pipe 121 passes through the fault fracture zone sample 160, and a plurality of grouting holes 1211 are opened on the side wall of the grouting pipe 121.

[0065] It can be understood that the fault fracture zone grouting reinforcement test device provided in the embodiment of the present application is provided with a grouting mold 110 and a conveying component 120, wherein a fault fracture zone sample 160 is provided in the grouting mold 110, and the conveying component 120 conveys a slurry containing microorganisms to the grouting mold 110, so as to utilize the microbial mineralization action to quickly precipitate calcite gel between the particles of the fault fracture zone, thereby improving the physical and mechanical properties of the fault fracture zone. In addition, a plurality of grouting holes 1211 are provided on the side wall of the grouting pipe 121, and grouting is performed simultaneously on multiple locations of the fault fracture zone sample 160 through the plurality of grouting holes 1211 to realize cross-layer injection of slurry, thereby avoiding the upper layer of the fault fracture zone sample 160 being solidified by the slurry first, and the slurry being unable to flow to the lower layer, or the slurry accelerating to flow due to its own weight, resulting in uneven grouting, incomplete consolidation and other problems. By observing the consolidation speed and uniformity of the sample, the grouting position and the position and number of the grouting holes 1211 are adjusted, thereby ensuring the actual grouting uniformity of the fault fracture zone according to the test and ensuring comprehensive consolidation of the fault fracture zone.

[0066] It can be understood that the grouting pipe 121 can be inserted from the bottom of the grouting mold 110, so that the grouting operation can be injected from the bottom of the fault fracture zone sample 160, thereby realizing the through-layer injection of a preset volume of slurry containing microorganisms into the fault fracture zone sample 160, which can discharge the air in the pores of the fault fracture zone sample 160 and avoid the slurry from being accelerated from top to bottom due to the influence of gravity, further ensuring that the grouting is more uniform.

[0067] In some examples, such as Figures 1 to 3 As shown, the grouting mold 110 includes: a shell 111, the shell 111 is provided with an air inlet 115; a rubber sleeve 112, which is arranged in the shell 111, and the fault fracture zone sample 160 is arranged in the rubber sleeve 112; a plug body 113, which blocks the port of the rubber sleeve 112, and the plug body 113 is provided with a through hole; the grouting pipe 121 passes through the rubber sleeve 112 through the through hole; wherein, a pressurized air bag 114 is formed between the shell 111 and the rubber sleeve 112.

[0068] It can be understood that the grouting mold 110 is provided with a shell 111, a rubber sleeve 112 and a plug body 113, wherein the shell 111 is provided with an air inlet 115, and a pressurized air bag 114 is formed between the shell 111 and the rubber sleeve 112. The rubber sleeve 112 is arranged in the shell 111, and the fault fracture zone sample 160 is arranged in the rubber sleeve 112. Plug bodies 113 are provided at both ends of the rubber sleeve 112. The grouting pipe 121 passes through the through hole of the plug body 113 and penetrates the rubber sleeve 112 to be inserted into the fault fracture zone sample 160 therein. Gas is injected into the pressurized airbag 114 through the air inlet 115 to increase the confining pressure on the fracture zone sample in the rubber sleeve 112. The rubber material of the rubber sleeve 112 can effectively transmit the pressure to the fault fracture zone sample 160, thereby changing the pressure condition of the fault fracture zone sample 160 to simulate the influence of the fault fracture zone test consolidation under various pressure environments. The plug body 113 can seal the rubber sleeve 112 to prevent the fault fracture zone sample 160 from flowing out of the rubber sleeve 112 under the influence of high pressure, thereby ensuring reliability.

[0069] For example, the pressurized airbag 114 may provide a pressure of 5 MPa to 16 MPa to the fault zone specimen 160 in the rubber sleeve 112 .

[0070] In some examples, the fault fracture zone sample 160 is composed of breccia, crushed stone, debris, and fault gouge.

[0071] It is understood that the proportions of breccia, crushed stone, debris, and fault gouge in the fault fracture zone sample 160 can be adjusted based on the content ratios of the various components in the actual fault fracture zone, wherein a fault gouge layer is provided between the mixture of breccia, crushed stone, and debris. This minimizes the difference between the sample and the actual fault fracture zone to ensure the accuracy of the test results.

[0072] In some examples, the fault fracture zone grouting reinforcement test device further includes: a filter screen, which is sleeved on the above-mentioned grouting pipe 121 and located outside the above-mentioned grouting hole 1211.

[0073] It can be understood that the grouting test device is also provided with a filter screen, which is set on the grouting pipe 121 and wrapped around the outside of the grouting hole 1211. This arrangement avoids the grouting hole 1211 being blocked by the fault fracture zone sample 160 during the process of inserting the grouting pipe 121 into the fault fracture zone sample 160 and during the grouting process, thereby ensuring the stability of the test.

[0074] In some examples, the grouting pipe 121 is made of stainless steel, the diameter of the grouting hole 1211 is less than or equal to 2 mm, and the distance between adjacent grouting holes 1211 is 0.5 mm to 0.7 mm.

[0075] It is understood that the grouting pipe 121 is made of stainless steel to reduce corrosion, extend its service life, and prevent the impact of rust on the test results. The diameter of the grouting hole 1211 is less than or equal to 2 mm to avoid the hole being too large, which would cause the fault fracture zone specimen 160 to enter the grouting pipe 121 through the grouting hole 1211 and cause blockage. The distance between adjacent grouting holes 1211 is 0.5 mm to 0.7 mm to ensure uniform grouting.

[0076] For example, the inner diameter of the grouting pipe 121 is 10 mm, the wall thickness is 1 mm, the aperture of the grouting hole 1211 is 2 mm, and the distance between adjacent grouting holes 1211 is 0.6 mm. The grouting pipe 121 is inserted from bottom to top along the axial direction of the fault fracture zone sample 160 to reduce the impact of uneven gas and slurry flow rates between pores and improve grouting uniformity.

[0077] In some examples, such as Figure 1 As shown, the above-mentioned fault fracture zone grouting reinforcement test device also includes: a collecting component 130, connected to the above-mentioned grouting pipe 121, for collecting the slurry flowing through the above-mentioned fault fracture zone sample 160; a first detection component, connected to the above-mentioned conveying component 120, for detecting the parameters of the slurry in the above-mentioned conveying component 120; a second detection component, connected to the above-mentioned collecting component 130, for detecting the parameters of the slurry in the above-mentioned collecting component 130; wherein the above-mentioned parameters are the pH, conductivity, pressure, flow rate and weight of the above-mentioned slurry.

[0078] It can be understood that the grouting test device is also provided with a collecting component 130, which is connected to the upper side of the grouting pipe 121 and is used to collect the slurry flowing through the above-mentioned fault fracture zone sample 160, so as to facilitate the detection of this part of the slurry. At the same time, a first detection component and a second detection component are also provided, wherein the first detection component is connected to the conveying component 120, and is used to detect the parameters of the slurry before being injected into the fault fracture zone sample 160, and the second detection component is connected to the collecting component 130, and is used to detect the parameters of the slurry flowing through the fault fracture zone sample 160, so as to obtain the pH, conductivity, pressure, flow rate and weight of the slurry before and after injection. By comparing the test data before and after injection, the most suitable test data can be determined, the uncertainty of human operation can be reduced, and the accuracy and reliability of the test results can be improved. A test database can be constructed based on the test results to facilitate subsequent research work.

[0079] In some examples, such as Figure 1As shown, the above-mentioned conveying assembly 120 includes: a first liquid reservoir 122; a first conveying pipe 123, connected to the above-mentioned first liquid reservoir 122, and the above-mentioned grouting pipe 121 is connected to the first conveying pipe 123; a first three-way valve 124, the first passage of the above-mentioned first three-way valve 124 is connected to the above-mentioned first conveying pipe 123, and the second passage of the above-mentioned first three-way valve 124 is connected to the above-mentioned grouting pipe 121; a second conveying pipe 125, connected to the third passage of the above-mentioned first three-way valve 124; a first valve 126, arranged on the above-mentioned first conveying pipe 123; a pump body 127, arranged on the above-mentioned first conveying pipe 123, located between the above-mentioned first valve 126 and the above-mentioned first three-way valve 124; a second valve 128, arranged on the above-mentioned first conveying pipe 123, located between the above-mentioned pump body 127 and the above-mentioned first three-way valve 124; a third valve 129, arranged on the above-mentioned second conveying pipe 125.

[0080] It can be understood that the slurry containing microorganisms before being injected into the fault fracture zone is stored in the first liquid reservoir 122, and the flow direction of the slurry is controlled by the first three-way valve 124. When the first passage and the second passage of the first three-way valve 124 are opened and the third passage is closed, the slurry can be transported along the first conveying pipe 123 and the grouting pipe 121 to the fault fracture zone sample 160 to consolidate the fault fracture zone sample 160; when the first passage and the third passage of the first three-way valve 124 are opened and the second passage is closed, the slurry flows out from the first conveying pipe 123 and the second conveying pipe 125 and will not be injected into the fault fracture zone sample 160; when the first passage, the second passage and the third passage of the first three-way valve 124 are all open, the slurry is conveyed to the fault fracture zone sample 160 and at the same time to the second conveying pipe 125.

[0081] A first valve 126 is provided on the first delivery pipe 123 to control the flow of slurry in the first delivery pipe 123. A pump body 127 is also provided on the first delivery pipe 123. The pump body 127 is located between the first valve 126 and the first three-way valve 124 to provide power for the slurry, pumping the slurry to the first three-way valve 124, and then pumping the slurry into the fault zone sample 160 and / or the second delivery pipe 125. A second valve 128 is provided on the first delivery pipe 123, located between the pump body 127 and the first three-way valve 124, to control the flow of the slurry after being powered by the pump body 127. A third valve 129 is provided on the second delivery pipe 125 to control the flow of slurry in the second delivery pipe 125.

[0082] In some examples, such as Figure 1As shown, the above-mentioned collecting assembly 130 includes: a second three-way valve 131, the fourth passage of the above-mentioned second three-way valve 131 is connected to the above-mentioned grouting pipe 121; a first collecting pipe 132, connected to the fifth passage of the above-mentioned second three-way valve 131; a second collecting pipe 133, connected to the sixth passage of the above-mentioned second three-way valve 131; a fourth valve 134, arranged on the above-mentioned second collecting pipe 133; a fifth valve 135, arranged on the above-mentioned first collecting pipe 132; and a second liquid reservoir 136, connected to the above-mentioned first collecting pipe 132.

[0083] It can be understood that the collection component 130 is also provided with a second three-way valve 131, which controls the direction of the slurry flowing out of the fault fracture zone sample 160. Specifically, when the fourth passage and the fifth passage of the second three-way valve 131 are opened and the sixth passage is closed, the slurry flows out from the grouting pipe 121 to the first collection pipe 132. When the fourth passage and the sixth passage of the second three-way valve 131 are opened and the fifth passage is closed, the slurry flows out from the grouting pipe 121 to the second collection pipe 133. When the fourth passage, the fifth passage and the sixth passage of the second three-way valve 131 are all opened, the slurry flows out from the grouting pipe 121 to the first collection pipe 132 and at the same time flows out to the second collection pipe 133.

[0084] A fourth valve 134 is provided on the second collection pipe 133 to control the flow of the slurry in the second collection pipe 133. The second collection pipe 133 is connected to a second liquid reservoir 136 to store the slurry flowing out of the second collection pipe 133. A fifth valve 135 is provided on the first collection pipe 132 to control the flow of the slurry in the first collection pipe 132.

[0085] In some examples, such as Figure 1 As shown, the first detection component includes: a first pH tester 141, connected to the first liquid reservoir 122; a first conductivity meter 142, connected to the first liquid reservoir 122; a first balance 143, to which the first liquid reservoir 122 is connected; a first flow meter 144, arranged on the first delivery pipe 123, located between the pump body 127 and the second valve 128; and a first pressure gauge 145, arranged at the port of the second delivery pipe 125.

[0086] As can be understood, the first detection assembly includes a first pH tester 141, a first conductivity meter 142, and a first balance 143, all connected to the first liquid reservoir 122 to detect the pH, conductivity, and weight of the slurry within the first liquid reservoir 122. Furthermore, a first flowmeter 144 is provided on the first delivery pipe 123. Specifically, the first flowmeter 144 is located between the pump body 127 and the second valve 128 to detect the flow rate of the slurry after it is powered by the pump body 127. A first pressure gauge 145 is installed at the end of the second delivery pipe 125. By adjusting the passage of the first three-way valve 124, the first pressure gauge 145 can detect the pressure of the slurry injected into the fault fracture zone sample 160. This arrangement allows the grouting speed to be adjusted based on the test results, by adjusting the power of the pump body 127 and the opening and closing of the first and second valves 126, 128, to ensure a uniform and slow grouting speed, ensuring that the slurry fully contacts the fault fracture zone sample 160.

[0087] It can be understood that when the reading of the first flow meter 144 becomes significantly smaller and the reading of the first pressure gauge 145 changes significantly, it means that the grouting is sufficient, and the grouting valve, the first valve 126 and the second valve 128 can be closed to allow the slurry to stand in the fault fracture zone sample 160 for a first preset time to ensure sufficient and uniform contact to ensure the consolidation effect.

[0088] In some examples, such as Figure 1 As shown, the second detection component includes: a second pH tester 151, connected to the second liquid reservoir 136; a second conductivity meter 152, connected to the second liquid reservoir 136; a second balance 153, to which the second liquid reservoir 136 is connected; a second flow meter 154, arranged on the first collecting tube 132, located between the second liquid reservoir 136 and the fifth valve 135; and a second pressure gauge 155, arranged at the port of the second collecting tube 133.

[0089] As can be understood, the second detection assembly is equipped with a second pH tester 151, a second conductivity meter 152, and a second balance 153, all connected to the second liquid reservoir 136 to detect the pH, conductivity, and weight of the slurry in the second liquid reservoir 136. Furthermore, a second flowmeter 154 is installed on the first collection tube 132 to detect the flow rate of the slurry flowing out of the fault fracture zone sample 160, and a second pressure gauge 155 is installed at the port of the second collection tube 133 to detect the pressure of the slurry flowing out of the fault fracture zone sample 160. By comparing the test data before and after injection, the most appropriate test data can be determined, reducing the uncertainty of human operation and improving the accuracy and reliability of the test results. A test database can be constructed based on the test results to facilitate subsequent research.

[0090] It can be understood that the entire test process is as follows: a fault fracture zone sample 160 is made according to the components of the actual fault fracture zone; after completing the assembly of the test device, gas is injected into the pressurized airbag 114 according to the actual pressure conditions to ensure that the confining pressure of the fault fracture zone sample 160 is close to the actual situation; the passage of the first three-way valve 124 is adjusted, and the slurry in the first liquid reservoir 122 is injected into the fault fracture zone sample 160 along the first conveying pipe 123 and the grouting pipe 121; and by adjusting the power of the pump body 127 and the opening and closing size of the first valve 126 and the second valve 128, the slurry is made to flow at a uniform and slow speed, so that the slurry is fully in contact with the fault fracture zone sample 160 to ensure the consolidation effect. When the reading of the first flow meter 144 becomes significantly smaller and the reading of the first pressure gauge 145 changes significantly, it means that the grouting is sufficient. The grouting valve, the first valve 126 and the second valve 128 can be closed to allow the slurry to stand in the fault fracture zone sample 160 for a first preset period of time, and then a preset volume of binder liquid is injected. After standing for a second preset period of time, the fifth valve 135 is opened and the injected slurry is collected through the second liquid reservoir 136.

[0091] During this process, the slurry parameters before injection can be recorded by reading the first flowmeter 144, the first pressure gauge 145, the first balance 143, the first pH meter 141, and the first conductivity meter. The slurry parameters after injection can be recorded by reading the second flowmeter 154, the second pressure gauge 155, the second balance 153, the second pH meter 151, and the second conductivity meter. This allows for the slurry's osmotic pressure, mass changes, and before-and-after comparisons of flow rate, pH, and conductivity. This enables real-time data collection and facilitates timely adjustment of test results. This reduces the uncertainty of human operation, improves the accuracy and reliability of test results, and allows the construction of a test database based on the test results to facilitate subsequent research.

[0092] In the description of the present invention, it should be understood that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0093] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations 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 any one or more embodiments or examples.

[0094] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A fault fracture zone grouting reinforcement test device, characterized in that: include: A grouting mold (110), comprising a shell (111) and a rubber sleeve (112) disposed in the shell (111), a fault fracture zone sample (160) disposed in the rubber sleeve (112), an air inlet (115) being provided in the shell (111), a pressurized air bag (114) being formed between the shell (111) and the rubber sleeve (112), and the pressurized air bag (114) being configured to apply a pressure of 5 MPa to 16 MPa to the fault fracture zone sample (160); The fault fracture zone sample (160) is composed of breccia, crushed stone, debris and fault gouge; A conveying assembly (120), the conveying assembly (120) comprising a grouting pipe (121) penetrating the fault fracture zone specimen (160), a plurality of grouting holes (1211) being provided on a side wall of the grouting pipe (121), the grouting pipe (121) having an inner diameter of 10 mm, a wall thickness of 1 mm, a hole diameter less than or equal to 2 mm, and a spacing between adjacent grouting holes (1211) of 0.5 mm to 0.7 mm; a collecting assembly (130), the collecting assembly (130) being connected to the grouting pipe (121) and being used for collecting slurry flowing through the fault fracture zone sample (160); The collecting assembly (130) comprises a first three-way valve (124), wherein a first passage of the first three-way valve (124) is connected to a first delivery pipe (123), a second passage of the first three-way valve (124) is connected to the grouting pipe (121), the first delivery pipe (123) is connected to the first liquid reservoir (122), the grouting pipe (121) is connected to the first delivery pipe (123), a third passage of the first three-way valve (124) is connected to a second delivery pipe (125), a first valve (126) and a second valve (128) are provided on the first delivery pipe (123), a pump body (127) is further provided on the first delivery pipe (123), the pump body (127) is located between the first valve (126) and the first three-way valve (124), the second valve (128) is located between the pump body (127) and the first three-way valve (124), and a third valve (129) is provided on the second delivery pipe (125); The collecting assembly (130) further comprises a second three-way valve (131), a fourth passage of the second three-way valve (131) being connected to the grouting pipe (121); a fifth passage of the second three-way valve (131) being connected to the first collecting pipe (132); a sixth passage of the second three-way valve (131) being connected to the second collecting pipe (133); a fourth valve (134) being provided on the second collecting pipe (133); a fifth valve (135) being provided on the first collecting pipe (132); and a second liquid reservoir (136) being connected to the first collecting pipe (132). A first detection assembly, the first detection assembly comprising a first pressure gauge (145) disposed at a port of the second delivery pipe (125); A second detection component, wherein the second detection component includes a second pressure gauge (155) arranged at a port of the second collecting pipe (133).

2. The device according to claim 1, characterized in that The grouting mold (110) further comprises: The plug body (113) blocks the port of the rubber sleeve (112), and the plug body (113) is provided with a through hole; the grouting pipe (121) passes through the rubber sleeve (112) through the through hole.

3. The device according to claim 1, characterized in that The grouting pipe (121) is made of stainless steel, and the outside of the grouting pipe (121) is covered with a filter screen.

4. The device according to claim 1, characterized in that The first detection component further includes: a first pH tester (141), connected to the first liquid reservoir (122); a first conductivity meter (142), connected to the first liquid reservoir (122); a first balance (143), wherein the first liquid reservoir (122) is connected to the first balance (143); The first flow meter (144) is provided on the first delivery pipe (123) and is located between the pump body (127) and the second valve (128).

5. The device according to claim 1, characterized in that The second detection component further includes: a second pH tester (151), connected to the second liquid reservoir (136); a second conductivity meter (152), connected to the second liquid reservoir (136); a second balance (153), wherein the second liquid reservoir (136) is connected to the second balance (153); The second flow meter (154) is provided on the first collecting pipe (132) and is located between the second liquid reservoir (136) and the fifth valve (135).

6. Application of the fault fracture zone grouting reinforcement test device according to any one of claims 1 to 5 in a fault fracture zone grouting reinforcement test.

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