Anti-seepage experiment device and anti-seepage experiment method for coal mine underground reservoir

Abstract

The invention provides an anti-seepage experiment device and an anti-seepage experiment method.The anti-seepage experiment device comprises a base, a first water tank, a second water tank, a third water tank and a loading assembly, the first water tank is provided with a water inlet A and a water outlet A, the second water tank is provided with a water inlet B and a water outlet B, the water outlet B is communicated with the water inlet A, and in the vertical direction, the water inlet A is communicated with the loading assembly; the water outlet B is higher than the water inlet A; the third water tank is provided with a water inlet C and a water outlet C, the water inlet C is communicated with the water outlet A, and the water inlet C is lower than the water outlet A in the vertical direction; a pressing plate of the loading assembly is used for abutting against a dam body test piece in the first water tank. Pressure is applied to the dam body test piece in the first water tank through the loading assembly, and the water level of the first water tank is changed through communication between the water tanks, so that the pressure bearing, water immersion and water loss working conditions of the underground reservoir dam body are simulated, and the research on the anti-seepage performance of the underground reservoir dam body is more real and effective.

Description

Technical Field

[0001] The invention relates to the technical field of anti-seepage experiments of underground reservoirs, and in particular to an anti-seepage experimental device and an anti-seepage experimental method for underground reservoirs in coal mines. Background Art

[0002] The dam of underground reservoir in coal mines is affected by static load and long-term cyclic immersion-dehydration. Under the action of water and rock, many microcracks will be formed, which will then crack, expand and penetrate, affecting its long-term stability. Its stability control has become the core issue of the construction and long-term safe operation of underground reservoir in coal mines. Therefore, it is very necessary to study the anti-seepage performance of underground reservoir dam in coal mines under pressure state under the influence of long-term cyclic immersion-dehydration conditions.

[0003] Existing technical equipment can only conduct immersion experiments on the dam body by maintaining a fixed water level in the water tank for a long time. It cannot simulate the pressure-bearing cyclic immersion and water loss according to the operation of the coal mine underground reservoir, thereby affecting the research on its anti-seepage performance.

[0004] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0005] The main purpose of the present invention is to provide an anti-seepage experimental device and an anti-seepage experimental method for underground water reservoirs in coal mines, so as to solve the technical problem that the experimental equipment in the prior art cannot fully simulate the pressure-bearing cyclic immersion and water loss conditions of underground water reservoirs, thereby affecting the research on the anti-seepage performance of underground water reservoir dams.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided an anti-seepage test device for underground water reservoirs in coal mines, comprising: a base; a first water tank, the first water tank being connected to the base, the first water tank having a water inlet A and a water outlet A; a second water tank, the second water tank being connected to the base, the second water tank having a water inlet B and a water outlet B, the water outlet B being connected to the water inlet A, and in the vertical direction, the position height of the water outlet B is higher than the position height of the water inlet A, so that the water in the second water tank flows into the first water tank through the water outlet B; a third water tank, the third water tank being connected to the base, the third water tank having a water inlet C and a water outlet C, the water inlet C being connected to the water outlet A, and in the vertical direction, the position height of the water inlet C is lower than the position height of the water outlet A, so that the water in the first water tank flows into the third water tank through the water outlet A; a loading assembly, the loading assembly being connected to the base, the loading assembly having a pressure plate, the pressure plate being used to abut against the dam body specimen in the first water tank to apply a vertical load to the dam body specimen.

[0007] Furthermore, the anti-seepage experimental device also includes: a water pump, which is connected to the base, the inlet of the water pump is connected to the water outlet C, and the outlet of the water pump is connected to the water inlet B.

[0008] Furthermore, the base is provided with a first bearing surface, a second bearing surface and a third bearing surface, in the vertical direction, the position height of the first bearing surface is lower than the position height of the second bearing surface, and the position height of the first bearing surface is higher than the position height of the third bearing surface, wherein the first water tank is connected to the first bearing surface, the second water tank is connected to the second bearing surface, and the third water tank is connected to the third bearing surface.

[0009] Furthermore, the first water tank, the second water tank and the third water tank are all made of transparent material.

[0010] Furthermore, a plurality of through holes are opened on one side of the first water tank, and the plurality of through holes are arranged at intervals along the height direction of the first water tank.

[0011] Furthermore, the loading assembly includes: a first support member, which is connected to the base; a second support member, which is located above the first water tank, and is hinged to the second support member. A pressure plate is provided in the middle of the second support member, and a tray is provided at one end of the second support member away from the first support member, and the tray is used to carry a counterweight.

[0012] Furthermore, an extension rod is provided in the middle of the second support member, the extension rod is vertically arranged with the second support member, and the pressure plate is hinged with the extension rod.

[0013] According to another aspect of the present invention, a method for anti-seepage testing of underground water reservoirs in coal mines is provided. The anti-seepage testing device mentioned above is used to perform the anti-seepage testing. The method comprises the following steps: placing a dam body specimen into a first water tank; applying an experimental load to the dam body specimen using a loading assembly according to the load borne by the dam body of the underground reservoir; calculating the experimental water level change height difference in the first water tank according to the water level change height difference of the underground reservoir; controlling the water level of the first water tank to change within a set time period according to the water level change frequency of the underground reservoir and the experimental water level change height difference; and taking out the dam body specimen to complete the experiment.

[0014] Furthermore, based on the height difference of the water level change in the underground reservoir, the experimental water level change height difference in the first water tank is calculated, including the following steps: measuring the height of the dam body specimen and the height of the underground reservoir dam body, and calculating the height ratio of the dam body specimen to the underground reservoir dam body; taking the quotient of the height difference of the water level change in the underground reservoir and the height ratio to obtain the experimental water level change height difference.

[0015] Furthermore, according to the frequency of water level changes in the underground reservoir and the height difference of the experimental water level changes, the water level of the first water tank is controlled to change within a set time period, including the following steps: filling water into the first water tank to a first water level; after the first water level persists for a first time period, the first water tank discharges water to a second water level; after the second water level persists for a first time period, the first water tank is filled with water to the first water level; within the set time period, the water level of the first water tank is controlled to switch between the first water level and the second water level.

[0016] By applying the technical solution of the present invention, the first water tank is used to place the dam body specimen, and the loading assembly applies a vertical load to the dam body specimen through a pressure plate to simulate the pressure-bearing condition of the underground reservoir dam body; the water inlet A of the first water tank is connected to the water outlet B of the second water tank, and the second water tank supplies water to the first water tank to simulate the flooding condition of the underground reservoir dam body; the water outlet A of the first water tank is connected to the water inlet C of the third water tank, and the first water tank discharges water into the third water tank to simulate the water loss condition of the underground reservoir dam body. In the above scheme, the dam body specimen in the first water tank is pressurized by the loading assembly, and the water level of the first water tank is changed by connecting the water tanks to fully simulate the pressure-bearing, flooding and water loss conditions of the underground reservoir dam body, thereby making the research on the anti-seepage performance of the underground reservoir dam body more realistic and effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 The three-dimensional structure schematic diagram of the anti-seepage experimental device of the present invention is shown;

[0019] Figure 2 Shows Figure 1 The main view;

[0020] Figure 3 Shows Figure 1 A top view of

[0021] Figure 4 Shows Figure 1 Right view of .

[0022] The above drawings include the following reference numerals:

[0023] 1. Base;

[0024] 11. First support; 12. Second support; 13. Third support;

[0025] 2. The first water tank;

[0026] 21. Water outlet A; 22. Through hole;

[0027] 3. Second water tank;

[0028] 31. Water outlet B;

[0029] 4. The third water tank;

[0030] 5. Load components;

[0031] 51. A first support member;

[0032] 52. second support member; 521. extension rod;

[0033] 53. Press plate;

[0034] 54. Pallet;

[0035] 6. Water pump. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0038] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0039] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0040] Figure 1 It is a three-dimensional structural schematic diagram of the anti-seepage experimental device in the present invention, Figure 2 This is the main view of the anti-seepage experimental device. Figure 3This is a top view of the anti-seepage experimental device. Figure 4 This is the right view of the anti-seepage experimental device.

[0041] Combination Figures 1 to 4 As shown, according to a specific embodiment of the present application, a coal mine underground reservoir anti-seepage experimental device is provided.

[0042] Specifically, the anti-seepage experimental device includes: a base 1, a first water tank 2, a second water tank 3, a third water tank 4 and a loading assembly 5. The first water tank 2 is connected to the base 1, and the first water tank 2 has a water inlet A and a water outlet A21. The second water tank 3 is connected to the base 1, and the second water tank 3 has a water inlet B and a water outlet B31, and the water outlet B31 is connected to the water inlet A. In the vertical direction, the position height of the water outlet B31 is higher than the position height of the water inlet A, so that the water in the second water tank 3 flows into the first water tank 2 through the water outlet B31. The third water tank 4 is connected to the base 1, and the third water tank 4 has a water inlet C and a water outlet C. The water inlet C is connected to the water outlet A21, and in the vertical direction, the position height of the water inlet C is lower than the position height of the water outlet A21, so that the water in the first water tank 2 flows into the third water tank 4 through the water outlet A21. The loading assembly 5 is connected to the base 1 , and has a pressing plate 53 , which is used to abut against the dam body specimen in the first water tank 2 to apply a vertical load to the dam body specimen.

[0043] Among them, the position height of the water outlet B31 is higher than the position height of the water inlet A, and the position height of the water inlet C is lower than the position height of the water outlet A21. There is no need to set up a suction device. The inherent characteristics of the water flow are used to achieve the water level adjustment of the first water tank 2, thereby reducing the design cost of the anti-seepage experimental device.

[0044] In the embodiment of the present application, the first water tank 2 is used to place the dam body specimen, and the loading assembly 5 applies a vertical load to the dam body specimen through the pressure plate 53 to simulate the pressure-bearing condition of the underground reservoir dam body; the water inlet A of the first water tank 2 is connected to the water outlet B31 of the second water tank 3, and the second water tank 3 supplies water to the first water tank 2 to simulate the flooding condition of the underground reservoir dam body; the water outlet A21 of the first water tank 2 is connected to the water inlet C of the third water tank 4, and the first water tank 2 drains water into the third water tank 4 to simulate the water loss condition of the underground reservoir dam body. In the above scheme, the dam body specimen in the first water tank 2 is pressurized by the loading assembly 5, and the water level of the first water tank 2 is changed by the connection between the water tanks, so as to fully simulate the pressure-bearing, flooding and water loss conditions of the underground reservoir dam body, thereby making the research on the anti-seepage performance of the underground reservoir dam body more realistic and effective.

[0045] In an exemplary embodiment of the present application, the anti-seepage experimental device also includes: a water pump 6, which is connected to the base 1, the inlet of the water pump 6 is connected to the water outlet C, and the outlet of the water pump 6 is connected to the water inlet B.

[0046] Specifically, Figure 1 , Figure 2 As shown, the base 1 is a frame structure, the water pump 6 is installed inside the base 1, the inlet of the water pump 6 is connected with the water outlet C through a hose, the outlet of the water pump 6 is connected with the water inlet B through a hose, and the water in the third water tank 4 flows into the second water tank 3 through the water pump 6, so that the water in the three water tanks circulates, thereby achieving an energy-saving effect.

[0047] Furthermore, the base 1 is provided with a first bearing surface, a second bearing surface and a third bearing surface, and in the vertical direction, the position height of the first bearing surface is lower than the position height of the second bearing surface, and the position height of the first bearing surface is higher than the position height of the third bearing surface, wherein the first water tank 2 is connected to the first bearing surface, the second water tank 3 is connected to the second bearing surface, and the third water tank 4 is connected to the third bearing surface. The structure of the base 1 above makes the bottom of the second water tank 3 higher than the top of the first water tank 2, and the top of the third water tank 4 is lower than the bottom of the first water tank 2, thereby making the positions of the water inlet and outlet of each water tank unrestricted and can be set at will.

[0048] Specifically, Figure 1 , Figure 2 As shown, the base 1 includes a first support 11, a second support 12 and a third support 13, wherein the first support 11 is located between the second support 12 and the third support 13, that is, the second support 12, the first support 11 and the third support 13 are sequentially connected and arranged along the length direction of the base 1, so that the base 1 has a stepped structure. The bottom surface of the first support 11, the bottom surface of the second support 12 and the bottom surface of the third support 13 are arranged flush, the top surface of the first support 11 is lower than the top surface of the second support 12, and the top surface of the first support 11 is higher than the top surface of the second support 12, wherein the top surface of the first support 11 is connected to the first water tank 2 as a first bearing surface, the top surface of the second support 12 is connected to the second water tank 3 as a second bearing surface, and the top surface of the third support 13 is connected to the third water tank 4 as a third bearing surface. Among them, the first support 11 and the second support 12 are both frame structures, that is, the first support 11 and the second support 12 are each provided with a accommodating cavity inside, the water pump 6 is arranged in the accommodating cavity of the second support 12, and the hose connected to the water pump 6 is passed through the accommodating cavity of the first support 11 and the accommodating cavity of the second support 12.

[0049] Specifically, Figure 1 , Figure 2As shown, the top opening of the first water tank 2 serves as the water inlet A, and the water outlet A21 of the first water tank 2 is arranged close to the bottom of the first water tank 2, which effectively increases the effective volume of the first water tank 2; in addition, the distance between the water inlet A and the water outlet A21 is increased to increase the range of water level variation in the first water tank 2. The water inlet B of the second water tank 3 is arranged close to the top opening of the second water tank 3, and the water outlet B31 of the second water tank 3 is arranged close to the bottom of the second water tank 3, so that the second water tank 3 can accommodate the aqueous solution to a greater extent, that is, increase the effective volume of the second water tank 3. The top opening of the third water tank 4 serves as the water inlet C, and the water outlet C of the third water tank 4 is arranged close to the bottom of the third water tank 4, so that the third water tank 4 can accommodate the aqueous solution to a greater extent, that is, increase the effective volume of the third water tank 4.

[0050] Specifically, Figure 2 As shown, a first valve is provided at the water outlet A21 of the first water tank 2, and a second valve is provided at the water outlet B31 of the second water tank 3. The water level in the first water tank 2 is changed by opening and closing the first valve and the second valve to simulate the immersion condition and water loss condition of the dam specimen.

[0051] In the embodiment of the present application, the first water tank 2, the second water tank 3 and the third water tank 4 are all made of transparent materials. Each water tank is made of transparent materials, which makes it easy to observe the changes of each water tank.

[0052] The first water tank 2, the second water tank 3 and the third water tank 4 can be made of transparent materials such as tempered glass or acrylic plates.

[0053] In an exemplary embodiment of the present application, a plurality of through holes 22 are provided on one side of the first water tank 2, and the plurality of through holes 22 are arranged at intervals along the height direction of the first water tank 2. By blocking the through holes 22 at corresponding heights, the effective height of the first water tank 2 is adjusted, thereby achieving water level change adjustment in the first water tank 2.

[0054] Specifically, Figure 1 , Figure 2 As shown, a side surface of the first water tank 2 close to the third water tank 4 is provided with a plurality of through holes 22, the plurality of through holes 22 are arranged at intervals along the height of the first water tank 2, each group of through holes 22 has a plurality of through holes 22, and the plurality of through holes 22 in each group are arranged at intervals along the width direction of the first water tank 2. A guide nozzle is provided at each through hole 22, and the guide nozzle is extended along the length direction of the first water tank 2 to guide the water in the first water tank 2 to be discharged into the third water tank 4.

[0055] In an exemplary embodiment of the present application, the loading assembly 5 includes: a first support member 51 and a second support member 52. The first support member 51 is connected to the base 1; the second support member 52 is located above the first water tank 2, the second support member 52 is hinged to the second support member 52, a pressing plate 53 is provided in the middle of the second support member 52, and a tray 54 is provided at one end of the second support member 52 away from the first support member 51, and the tray 54 is used to carry the counterweight. The first support member 51 and the second support member 52 constitute a force lever so that the counterweight is applied to the pressing block with multiple gravity.

[0056] Specifically, Figure 1 As shown, the first support member 51 is connected to the top surface of the first support 11, and the second support member 52 is hinged to the top end of the first support member 51, wherein the second support member 52 is extended along the width direction of the first support 11. A pressing plate 53 is provided in the middle of the second support member 52, and a tray 54 is provided at one end of the second support member 52 away from the first support member 51. By changing the number of counterweights in the tray 54, the pressure of the pressing plate 53 on the dam body specimen can be adjusted.

[0057] Furthermore, an extension rod 521 is provided in the middle of the second support member 52, and the extension rod 521 is vertically arranged with the second support member 52, and the pressing plate 53 is hinged with the extension rod 521. The pressing plate 53 is hinged with the extension rod 521, and in the process of the second support member 52 rotating around the first support member 51, the pressing plate 53 is always in a horizontal state, that is, the bottom surface of the pressing plate 53 is always in contact with the top surface of the dam body specimen, so that the pressure bearing of the dam body specimen is always arranged in a vertical direction.

[0058] According to another specific embodiment of the present application, a method for anti-seepage testing of underground water reservoirs in coal mines is provided. The anti-seepage testing device in the above embodiment is used to perform an anti-seepage test. The anti-seepage testing method includes the following steps:

[0059] Step S1: placing the dam body specimen into the first water tank 2 .

[0060] Step S2: according to the load on the dam body of the underground reservoir, the loading assembly 5 is used to apply the experimental load to the dam body specimen.

[0061] Step S3: Calculate the experimental water level change height difference in the first water tank 2 according to the water level change height difference of the underground reservoir.

[0062] Step S4: According to the water level change frequency of the underground reservoir and the height difference of the experimental water level change, the water level of the first water tank 2 is controlled to change within a set time period.

[0063] Step S5: Take out the dam specimen and complete the experiment.

[0064] Through the above steps S1 to S5, the anti-seepage experimental device is used to apply pressure to the dam body specimen in the first water tank 2 to simulate the pressure-bearing condition of the underground reservoir dam body, and the water level of the first water tank 2 is changed to simulate the water loss condition of the underground reservoir dam body, thereby making the anti-seepage performance research of the underground reservoir dam body more realistic and effective.

[0065] Among them, the dam body specimen is made into an artificial dam body specimen according to the artificial concrete mix ratio of the underground reservoir; and typical coal pillar dam body specimens can also be obtained by drilling and processing on-site in the underground reservoir.

[0066] In step S2, according to the load on the underground reservoir dam body, the loading assembly 5 is used to apply the experimental load to the dam body specimen, including the following steps:

[0067] The load P0 of the underground reservoir dam specimen is calculated according to the buried depth, and the required counterweight mass M0 is calculated according to the multiple n0 that the loading assembly 5 can magnify the counterweight, and the corresponding counterweight is placed on the tray 54.

[0068] P0 = γ × h0, where P0 is the load on the underground reservoir dam specimen, in Pa; γ is the bulk density of the overlying rock stratum, in N / m 3 ; h0 is the buried depth of the underground reservoir dam specimen, in m.

[0069] M0=(P0×S1)÷(n0×g), where M0 is the mass of the counterweight block, in kg; S1 is the contact area between the dam specimen and the pressure plate 53, in m 2 ; n0 is the magnification factor of the loading component 5, and has no unit; g is the acceleration due to gravity, and its unit is N / kg.

[0070] Step S3, calculating the experimental water level change height difference in the first water tank 2 according to the water level change height difference of the underground reservoir, comprises the following steps:

[0071] Step S31: measuring the height of the dam body specimen and the height of the underground reservoir dam body, and calculating the height ratio of the dam body specimen to the underground reservoir dam body.

[0072] Specifically, n1=h2÷h1, where h2 is the height of the underground reservoir dam, in meters; n1 is the similarity ratio, without units; and h1 is the height of the dam specimen, in meters.

[0073] Step S32: Calculate the quotient of the height difference of the water level change in the underground reservoir and the height ratio to obtain the experimental water level change height difference.

[0074] Specifically, h3=h4÷n1, where h3 is the simulated height difference in the experimental box, in meters; h4 is the actual height difference of the groundwater reservoir water level change, in meters.

[0075] In step S4, according to the water level change frequency of the underground reservoir and the height difference of the experimental water level change, the water level of the first water tank 2 is controlled to change within a set time period, including the following steps:

[0076] Step S41: filling the first water tank 2 with water to a first water level;

[0077] h3 is the simulated height difference in the experimental box. According to the height of the water outlet A21 of the first water tank 2 and the simulated height difference, the height of the first water level is calculated, that is, the sum of the height of the water outlet A21 and the simulated height difference h3.

[0078] Step S42: After the first water level lasts for a first time period, the first water tank 2 drains water to a second water level;

[0079] The first duration is the duration of the high or low water level of the underground reservoir, and controls the first water tank 2 to drain water into the third water tank 4 to the second water level, which is the height of the water outlet A21 of the first water tank 2. That is, the opening and closing of the first valve of the first water tank 2 is controlled by the timing switch.

[0080] Step S43: After the second water level lasts for the first time period, water is added to the first water tank 2 to the first water level;

[0081] The first duration is the duration of the high water level or low water level of the underground reservoir, and the second water tank 3 is controlled to add water to the first water tank 2 to the first water level. That is, the opening and closing of the second valve of the second water tank 3 is controlled by the timer switch.

[0082] Step S44: within a set time period, controlling the water level of the first water tank 2 to switch between the first water level and the second water level.

[0083] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0084] 1. The first water tank 2 is used to place the dam specimen, and the loading assembly 5 applies a vertical load to the dam specimen through the pressure plate 53 to simulate the pressure of the underground reservoir dam body; the water inlet A of the first water tank 2 is connected to the water outlet B31 of the second water tank 3, and the second water tank 3 supplies water to the first water tank 2 to simulate the flooding condition of the underground reservoir dam body; the water outlet A21 of the first water tank 2 is connected to the water inlet C of the third water tank 4, and the first water tank 2 drains water into the third water tank 4 to simulate the water loss condition of the underground reservoir dam body. In the above scheme, the dam specimen in the first water tank 2 is pressurized by the loading assembly 5, and the water level of the first water tank 2 is changed by connecting the bars between the water tanks to fully simulate the pressure, flooding and water loss conditions of the underground reservoir dam body, thereby making the research on the anti-seepage performance of the underground reservoir dam body more realistic and effective.

[0085] 2. The height of the water outlet B31 is higher than that of the water inlet A, and the height of the water inlet C is lower than that of the water outlet A21. There is no need to set up a suction device. The inherent characteristics of the water flow can be used to adjust the water level of the first water tank 2, thereby reducing the design cost of the anti-seepage experimental device.

[0086] 3. The water pump 6 is connected to the base 1, the inlet of the water pump 6 is connected to the water outlet C, and the outlet of the water pump 6 is connected to the water inlet B, so that the experimental water is recycled among the water tanks.

[0087] 4. The first support member 51 and the second support member 52 of the loading assembly 5 form a force-applying lever, so that the counterweight block applies multiple gravity to the pressure block to meet the long-term pressure-bearing conditions of the dam body specimen.

[0088] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0089] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present invention.

[0090] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An anti-seepage test device for underground water reservoirs in coal mines, characterized in that: include: Base (1); A first water tank (2), the first water tank (2) being connected to the base (1), the first water tank (2) having a water inlet A and a water outlet A (21); a second water tank (3), the second water tank (3) being connected to the base (1), the second water tank (3) having a water inlet B and a water outlet B (31), the water outlet B (31) being arranged in communication with the water inlet A, and in the vertical direction, the position height of the water outlet B (31) being higher than the position height of the water inlet A, so that the water in the second water tank (3) flows into the first water tank (2) through the water outlet B (31); a third water tank (4), the third water tank (4) being connected to the base (1), the third water tank (4) having a water inlet C and a water outlet C, the water inlet C being connected to the water outlet A (21), and the water inlet C being located at a lower height than the water outlet A (21) in the vertical direction, so that the water in the first water tank (2) flows into the third water tank (4) through the water outlet A (21); A loading assembly (5), the loading assembly (5) being connected to the base (1), the loading assembly (5) having a pressing plate (53), the pressing plate (53) being used to abut against a dam body specimen in the first water tank (2) so as to apply a vertical load to the dam body specimen.

2. The anti-seepage test device according to claim 1, characterized in that: The anti-seepage experimental device also includes: A water pump (6), wherein the water pump (6) is arranged on and connected to the base (1), wherein the inlet of the water pump (6) is connected to the water outlet C, and the outlet of the water pump (6) is connected to the water inlet B.

3. The anti-seepage test device according to claim 1, characterized in that: The base (1) is provided with a first bearing surface, a second bearing surface and a third bearing surface, wherein in the vertical direction, the position height of the first bearing surface is lower than the position height of the second bearing surface, and the position height of the first bearing surface is higher than the position height of the third bearing surface, wherein the first water tank (2) is connected to the first bearing surface, the second water tank (3) is connected to the second bearing surface, and the third water tank (4) is connected to the third bearing surface.

4. The anti-seepage test device according to claim 1, characterized in that: The first water tank (2), the second water tank (3) and the third water tank (4) are all made of transparent material.

5. The anti-seepage test device according to claim 1, characterized in that: A plurality of through holes (22) are provided on one side of the first water tank (2), and the plurality of through holes (22) are arranged at intervals along the height direction of the first water tank (2).

6. The anti-seepage test device according to claim 1, characterized in that: The loading component (5) comprises: A first support member (51), the first support member (51) being connected to the base (1); A second support member (52), the second support member (52) is located above the first water tank (2), the second support member (52) is hinged to the second support member (52), the pressure plate (53) is provided in the middle of the second support member (52), and a tray (54) is provided at one end of the second support member (52) away from the first support member (51), and the tray (54) is used to carry a counterweight.

7. The anti-seepage test device according to claim 6, characterized in that: An extension rod (521) is provided in the middle of the second support member (52), the extension rod (521) and the second support member (52) are arranged vertically, and the pressing plate (53) is hinged to the extension rod (521).

8. A method for anti-seepage test of underground water reservoir in coal mines, characterized in that: The anti-seepage experiment device according to any one of claims 1 to 7 is used to perform an anti-seepage experiment, and the anti-seepage experiment method comprises the following steps: Placing the dam body specimen into the first water tank (2); According to the load on the dam body of the underground reservoir, a test load is applied to the dam body specimen using a loading assembly (5); Calculating the experimental water level change difference in the first water tank (2) according to the water level change difference in the underground reservoir; According to the water level change frequency of the underground reservoir and the height difference of the experimental water level change, the water level of the first water tank (2) is controlled to change within a set time period; The dam body specimen is taken out to complete the experiment.

9. The anti-seepage test method according to claim 8, characterized in that: Calculating the experimental water level change difference in the first water tank (2) according to the water level change difference in the underground reservoir comprises the following steps: Measuring the height of the dam body specimen and the height of the underground reservoir dam body, and calculating the height ratio of the dam body specimen to the underground reservoir dam body; The water level change height difference of the underground water reservoir is divided by the height ratio to obtain the experimental water level change height difference.

10. The anti-seepage test method according to claim 8, characterized in that: According to the water level change frequency of the underground water reservoir and the height difference of the experimental water level change, the water level of the first water tank (2) is controlled to change within a set time period, comprising the following steps: Filling the first water tank (2) with water to a first water level; After the first water level lasts for a first period of time, the first water tank (2) drains water outward to a second water level; After the second water level lasts for the first time period, the first water tank (2) is filled with water to the first water level; Within a set time period, the water level of the first water tank (2) is controlled to switch between the first water level and the second water level.

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