Similar simulation experiment device under water accumulation condition of abandoned mine goaf

Abstract

The utility model relates to the technical field of analog simulation experiments under the water accumulation condition of a waste mine goaf, in particular to an analog simulation experiment device under the water accumulation condition of the waste mine goaf, which comprises a frame, a transparent acrylic plate is hermetically clamped and mounted on the front surface of the frame, a hole is formed in the transparent acrylic plate, and the transparent acrylic plate is connected with the frame. Multiple groups of water inlets are formed in one side of the frame, multiple groups of water outlets are formed in the other side of the frame, the water inlets and the water outlets are symmetrically arranged, water inlet assemblies are mounted at the water inlets, and water outlet assemblies are mounted at the water outlets; the rock stratum simulation material is built in the frame according to the mine rock stratum geology, the water bag is placed in the rock stratum simulation material, after building is stable, the water bag is punctured through the hole, ore bed mining is simulated, and a goaf is formed, so that compared with the use of solid paraffin, a user does not need to worry that the test result is influenced by adhesion of the material and the inner wall of the device; and the test pressure condition is not influenced by a heating device.

Description

TECHNICAL FIELD

[0001] The utility model relates to the similar simulation experiment field under the condition of abandoned mine goaf water, concretely is a similar simulation experiment device under the condition of abandoned mine goaf water. BACKGROUND

[0002] The abandoned mine goaf refers to the mined-out cavity or underground space left after the mine stops operating and mining operation terminates. After the mine is closed, due to the lack of conventional drainage system, surface water or groundwater may seep into the goaf through the fissures of the rock stratum, shaft or ventilation hole. Precipitation around the mine area may also enter the goaf through the cracks and channels of the mine. Moreover, when the mine is closed, the drainage equipment such as water pump is usually shut down, resulting in the gradual rise of groundwater level and the flooding of the goaf, eventually forming water accumulation. This leads to the instability of the stratum in the abandoned mine goaf, and there is a risk of collapse, especially the settlement of the surface above the mining area, which affects the safety of buildings and infrastructure.

[0003] In order to study the influence mechanism of mine water on the movement of overlying stratum and crack expansion in the closed mine goaf, physical similar simulation experiments need to be conducted under the condition of abandoned mine goaf water. The existing similar simulation experiment device under the condition of abandoned mine goaf water, such as the two-dimensional solid-liquid coupling similar simulation coal mine goaf water experiment device proposed in patent application number "CN202122326775.6", uses a test box, a base, a coal seam, overlying strata, a heating device, a liquid discharge pipe and other structures. The coal seam is simulated by solid paraffin, the heating device heats the coal seam, and the solid paraffin melts to simulate coal mining, forming a mined-out area.

[0004] However, the existing technology has defects. After the solid paraffin melts, the solid paraffin and the upper simulation material still stick together, resulting in a certain adhesion between the simulation material and the inner wall of the test box, which affects the geological changes after the simulation material accumulates water. Moreover, the heating device changes the pressure conditions of the test conditions, resulting in inaccurate simulation experiment process. Therefore, a similar simulation experiment device under the condition of abandoned mine goaf water is proposed. Utility model content

[0005] The utility model aims to provide a similar simulation experiment device under the condition of abandoned mine goaf water to solve the problems raised in the background technology.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] The utility model provides a kind of similar simulation experiment device under the condition of abandoned mine goaf water, including frame, the transparent acrylic plate of frame front face sealing type clamping installation, transparent acrylic plate is opened with hole, frame one side is opened with multiple groups of water inlets, the other side is opened with multiple groups of water outlets, water inlet and water outlet are symmetrically arranged, water inlet is installed with water inlet assembly, and water outlet is installed with water outlet assembly, frame is filled with rock stratum simulation material, water bag is filled in the position of hole side inside rock stratum simulation material, and pressure sensor is buried in the position of rock stratum simulation material above water bag.

[0008] Preferably, the frame is fixed with a clamping frame on the front, the clamping frame is shaped as a "U" type, the transparent acrylic plate is clamped and installed in the clamping frame, and a sealing strip is squeezed and filled between the edge of the transparent acrylic plate and the inner wall of the clamping frame.

[0009] Preferably, the multiple groups of water inlets and water outlets are arranged in a linear array, and the multiple groups of water inlets and water outlets are located at the middle part of the side of the frame. The water inlet assembly includes multiple groups of connecting pipes I, the multiple groups of connecting pipes I are respectively installed on the multiple groups of water inlets, the end portions of the multiple groups of connecting pipes I are commonly connected and fixed with a water injection pipe, the lower end of the water injection pipe is commonly connected and fixed with a water injection port, and the side walls of the multiple groups of connecting pipes I are fixed with electromagnetic valves.

[0010] Preferably, the water outlet assembly includes multiple groups of connecting pipes II, the side walls of the multiple groups of connecting pipes II are fixed with pressure maintaining valves, the multiple groups of connecting pipes II are respectively installed on the multiple groups of water outlets, the end portions of the multiple groups of connecting pipes II are commonly connected and fixed with a water outlet pipe, and the lower end of the water outlet pipe is commonly connected and fixed with a drain port.

[0011] Preferably, the transparent acrylic plate is fixed with two groups of sliding frames on one side outside the frame, the two groups of sliding frames are slidingly connected with a transparent sealing plate, and the transparent sealing plate is used to close the hole.

[0012] Preferably, the transparent acrylic plate is provided with a scale line on one side, and the frame is fixed with a base for supporting the device at the lower end.

[0013] The utility model has the advantages that:

[0014] The utility model builds rock stratum simulation material according to mine rock stratum geology inside the frame, places the water bag in the rock stratum simulation material when building, and makes the water bag on one side of the hole. After the rock stratum simulation material is built stably, the water bag is pierced through the hole to simulate mining of the ore bed and form a goaf. Compared with the use of solid paraffin, the utility model does not need to worry about the adhesion of the material and the inner wall of the device affecting the test results, and the heating device does not affect the test pressure condition. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical schemes in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced as follows. Obviously, the drawings needed to be used for the description of the embodiments can also be obtained by those of ordinary skill in the art without any creative effort.

[0016] Figure 1 is a schematic diagram of the overall structure of the present application;

[0017] Figure 2 is a schematic diagram of the front structure of the present application;

[0018] Figure 3 is a schematic diagram of the cross-sectional structure of the present application;

[0019] Figure 4 is a schematic diagram of the top view structure of the present application;

[0020] Figure 5 is Figure 4 is an enlarged schematic diagram of the structure at A of the present application;

[0021] The reference signs in the drawings are as follows:

[0022] 1, frame; 2, transparent acrylic plate; 3, base; 4, clamping frame; 5, sealing strip; 6, sliding frame; 7, hole; 8, transparent sealing plate; 9, scale; 10, water inlet; 11, water outlet; 12, connecting pipe one; 13, electromagnetic valve; 14, water injection pipe; 15, water injection port; 16, connecting pipe two; 17, pressure retaining valve; 18, water outlet pipe; 19, drain port; 20, rock stratum simulation material; 21, water bag; 22, pressure sensor. DETAILED DESCRIPTION

[0023] The technical schemes in the embodiments of the present application will be described clearly and completely in combination with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without any creative effort fall within the scope of the present application.

[0024] A similar simulation experiment device under the condition of accumulated water in a waste mine goaf is provided, such as Figures 1-5As shown, including frame 1, the frame 1 is sealed to the front of the card installation of transparent acrylic plate 2, transparent acrylic plate 2 is provided with a hole 7, frame 1 is provided with a plurality of water inlet 10 on one side, the other side is provided with a plurality of water outlet 11, water inlet 10 and water outlet 11 are symmetrically arranged, water inlet 10 is provided with a water inlet assembly, water outlet 11 is provided with a water outlet assembly, the frame 1 is filled with rock layer simulation material 20, the rock layer simulation material 20 is filled with water bag 21 inside the hole 7 side, the rock layer simulation material 20 is buried with pressure sensor 22 above the water bag 21.

[0025] Transparent acrylic plate 2 is sealed with frame 1, which is convenient for observing the internal condition of frame 1, water inlet 10 and water outlet 11 are arranged as a vertical column, compared with traditional rock layer simulation material 20, the experiment considers that the traditional material will disintegrate when it meets water, so the traditional material is improved, the experiment adopts some hydrophobic materials such as paraffin, vaseline and the like as the main cementing material, adopts paraffin, vaseline and the like as hydrophobic material, and adopts fine sand, pebbles, quartz sand and the like material, then mixes the material according to the similar ratio of waste mine coal rock layer distribution characteristics, stress, size, time and the like to form rock layer simulation material 20.

[0026] By building rock layer simulation material 20 in frame 1 according to the geological characteristics of mine rock layer, when building, water bag 21 is placed in rock layer simulation material 20, and water bag 21 is located on one side of hole 7, and pressure sensor 22 (model GPD60) is installed on the upper layer of rock layer simulation material 20, pressure sensor 22 monitors the stress field change in the process of immersion, when rock layer simulation material 20 is built stably, water bag 21 is pierced through hole 7, simulating mining, forming goaf, compared with using solid paraffin, there is no need to worry about the adhesion of material and device inner wall affecting the test result, and there is no heating device affecting the test pressure condition, after the whole simulation rock layer is stable, the similar simulation experiment is carried out.

[0027] As shown in Figure 1 , Figure 4 , Figure 5 As shown, the frame 1 is fixed with a card frame 4 on the front, the card frame 4 is arranged in "U" shape, the transparent acrylic plate 2 is clamped and installed in the card frame 4, and the sealing strip 5 is filled between the edge of the transparent acrylic plate 2 and the inner wall of the card frame 4.

[0028] The card frame 4 is convenient for installing the transparent acrylic plate 2, and the sealing strip 5 seals between the acrylic plate and the inner wall of the card frame 4, preventing water leakage in the frame 1.

[0029] As shown in Figures 1-4As shown in the drawings, the plurality of water inlets 10 and water outlets 11 are arranged in linear arrays, and the plurality of water inlets 10 and water outlets 11 are located at the middle positions of the side surfaces of the frame 1. The water inlet assembly comprises a plurality of connecting pipes 12, the plurality of connecting pipes 12 are respectively installed on the plurality of water inlets 10, the end portions of the plurality of connecting pipes 12 are connected and fixed with a water injection pipe 14, the lower end of the water injection pipe 14 is connected and fixed with a water injection opening 15, and the side walls of the plurality of connecting pipes 12 are fixed with electromagnetic valves 13.

[0030] When the similar simulation experiment is carried out, the external water injection system is connected with the water injection opening 15, the external water injection system comprises a water pump, the internal water injection of the water injection pipe 14 is controlled, the plurality of electromagnetic valves 13 (the model is DN65) are controlled to be opened or closed, and the plurality of electromagnetic valves 13 are opened step by step from the bottom to the top, so that the influence of water accumulated in the mine after the mine is closed on the stress, displacement and crack evolution of the overburden strata of the goaf is simulated.

[0031] As shown in the drawings, Figures 1-4 the water outlet assembly comprises a plurality of connecting pipes 16, the side walls of the plurality of connecting pipes 16 are fixed with pressure maintaining valves 17, the plurality of connecting pipes 16 are respectively installed on the plurality of water outlets 11, the end portions of the plurality of connecting pipes 16 are connected and fixed with a water outlet pipe 18, and the lower end of the water outlet pipe 18 is connected and fixed with a water outlet 19.

[0032] The water in the frame 1 flows out through the water outlet 11, and when the water pressure in the frame 1 exceeds a set valve value, the safety valve is opened, so that the device is prevented from being continuously injected with water to cause the water pressure to be too large and exceed the simulation value.

[0033] As shown in the drawings, Figure 1 , Figure 2 , Figure 4 , Figure 5 the transparent acrylic plate 2 is fixed with two groups of sliding frames 6 on one side outside the frame 1, the two groups of sliding frames 6 are slidably connected with a transparent sealing plate 8, and the transparent sealing plate 8 is used for sealing the hole 7.

[0034] When the water bag 21 is punctured through the hole 7, the transparent sealing plate 8 is immediately pulled downward to seal the hole 7, so that water is prevented from leaking from the hole 7.

[0035] As shown in the drawings, Figure 1 one side of the transparent acrylic plate 2 is provided with a scale line 9, and the lower end of the frame 1 is fixed with a base 3 for supporting the device.

[0036] The scale line 9 facilitates observation of the degree of strata subsidence in the frame 1, and the base 3 supports the device stably.

[0037] The working principle of the similar simulation experiment device under the condition of waste mine goaf water accumulation provided by the utility model is as follows:

[0038] By building the stratum simulation material 20 according to the geological characteristics of the stratum inside the frame 1, the water bag 21 is placed inside the stratum simulation material 20, and the water bag 21 is located on one side of the hole 7, and the pressure sensor 22 is installed on the upper layer of the stratum simulation material 20, the pressure sensor 22 monitors the stress field change in the water immersion process, when the stratum simulation material 20 is built stably, the water bag 21 is punctured through the hole 7, the stratum simulation material 20 is simulated to be mined, and the goaf is formed, compared with the solid paraffin, the material and the inner wall of the device are not bonded to affect the test results, and the heating device does not affect the test pressure condition, after the overall simulation stratum is stable, the similar simulation experiment is carried out.

[0039] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A similar simulation experiment device under the condition of abandoned mine goaf water, comprising a frame (1), characterized in that, The frame (1) is front sealedly clamped with a transparent acrylic plate (2), the transparent acrylic plate (2) is provided with a hole (7), a plurality of water inlet openings (10) are formed on one side of the frame (1), a plurality of water outlet openings (11) are formed on the other side, the water inlet openings (10) and the water outlet openings (11) are symmetrically arranged, a water inlet assembly is arranged at the water inlet openings (10), a water outlet assembly is arranged at the water outlet openings (11), the frame (1) is filled with a rock layer simulation material (20), a water bag (21) is filled in the rock layer simulation material (20) at a position on one side of the hole (7), and a pressure sensor (22) is buried above the water bag (21).

2. The similar simulation experiment device for the water in the goaf of the abandoned mine according to claim 1, characterized in that, The frame (1) is front sealedly clamped with a transparent acrylic plate (2), the transparent acrylic plate (2) is provided with a hole (7), a plurality of water inlet openings (10) are formed on one side of the frame (1), a plurality of water outlet openings (11) are formed on the other side, the water inlet openings (10) and the water outlet openings (11) are symmetrically arranged, a water inlet assembly is arranged at the water inlet openings (10), a water outlet assembly is arranged at the water outlet openings (11), the frame (1) is filled with a rock layer simulation material (20), a water bag (21) is filled in the rock layer simulation material (20) at a position on one side of the hole (7), and a pressure sensor (22) is buried above the water bag (21).

3. The similar simulation experiment device for the water in the goaf of the abandoned mine according to claim 1, characterized in that, A plurality of the water inlet openings (10) and the water outlet openings (11) are linearly arranged, and a plurality of the water inlet openings (10) and the water outlet openings (11) are located at the middle of the side of the frame (1), the water inlet assembly comprises a plurality of connecting pipes I (12), the plurality of connecting pipes I (12) are respectively arranged on the plurality of water inlet openings (10), the end portions of the plurality of connecting pipes I (12) are connected to a water injection pipe (14) in a common way, the lower end of the water injection pipe (14) is connected to a water injection opening (15) in a common way, and the side walls of the plurality of connecting pipes I (12) are fixedly connected with electromagnetic valves (13).

4. The similar simulation experiment device for the abandoned mine goaf water accumulation condition according to claim 3, characterized in that, The water outlet assembly comprises a plurality of connecting pipes II (16), the side walls of the plurality of connecting pipes II (16) are fixedly connected with pressure maintaining valves (17), the plurality of connecting pipes II (16) are respectively arranged on the plurality of water outlet openings (11), and the end portions of the plurality of connecting pipes II (16) are connected to a water outlet pipe (18) in a common way, the lower end of the water outlet pipe (18) is connected to a drain opening (19) in a common way.

5. The similar simulation experiment device for the abandoned mine goaf water accumulation condition according to claim 1, characterized in that, The transparent acrylic plate (2) is fixedly connected with two slide frames (6) on one side outside the frame (1), the two slide frames (6) are slidably connected with a transparent sealing plate (8), and the transparent sealing plate (8) is used for sealing the hole (7).

6. The similar simulation experiment device for the abandoned mine goaf water accumulation condition according to claim 1, characterized in that, The transparent acrylic plate (2) is provided with a scale line (9) on one side, and the lower end of the frame (1) is fixedly connected with a base (3) for supporting the device.

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