Visual test device for fracture evolution and seepage characteristics in fluidized mining of coal mine

Abstract

The invention relates to the technical field of mineral exploitation, and particularly discloses a coal mine fluidized exploitation fracture evolution and seepage characteristic visual test device which comprises a bottom plate, a support is fixedly connected to the top of the bottom plate, a drilling device is fixedly connected to the top of the support, and an experimental device is fixedly connected to the part, away from the support, of the top of the bottom plate. The part, far away from the experimental device, of the top of the bottom plate is fixedly connected with a mixing device, the top of the mixing device is fixedly connected with a washing device, the part, far away from the washing device, of the top of the mixing device is communicated with a feeding port, and the washing device can effectively mix an accelerator and liquid. The coal mine fluidized mining fracture evolution and seepage characteristic visual test device achieves the purposes that the drilling depth can be effectively observed, meanwhile, the pH value can be autonomously adjusted to test the influence on different conditions, meanwhile, an accelerator can be more fully mixed with liquid, and the liquid initial setting effect is better and more uniform.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mineral exploitation, in particular to a coal mine fluidized mining fracture evolution and seepage characteristic visualization test device. BACKGROUND

[0002] Deep coal resource fluidized mining involves stress-temperature-seepage-chemistry-microorganism and other multi-field coupling. In the process of fluidized mining, the fracture evolution and seepage characteristics of the coal body are comprehensively affected by various factors such as changes in ground stress, fluctuations in temperature, fluid seepage, and chemical reactions. The interaction of these factors makes the fracture evolution and seepage process extremely complex, which needs to be studied in depth through a visualization test device. Factors such as reservoir electrical properties affect the seepage pattern. For example, after adding a surfactant during coal seam water injection, the gas-liquid two-phase seepage pattern under the influence of different electrical properties on the coal reservoir surface is more complex. However, existing seepage experimental techniques cannot perform seepage tests under different electrical conditions, nor can they simulate seepage under other complex conditions.

[0003] The current coal mine fluidized mining fracture evolution and seepage characteristic visualization test device cannot fully mix the accelerator with the liquid, resulting in inconsistent initial setting effects. SUMMARY

[0004] To solve the above problems, the present application is implemented by the following technical scheme: a coal mine fluidized mining fracture evolution and seepage characteristic visualization test device, comprising a bottom plate, the top of the bottom plate is fixedly connected with a support, the top of the support is fixedly connected with a drilling device, the top of the bottom plate is fixedly connected with an experimental device on one side of the support, the top of the bottom plate is fixedly connected with a mixing device on one side of the experimental device, the top of the mixing device is fixedly connected with a flushing device, and the top of the mixing device is communicated with a feed inlet on one side of the flushing device; The drilling device comprises a first motor, the driving end of the first motor is fixedly connected with a first rotating shaft, the bottom of the first rotating shaft is fixedly connected with the fixed end of a first automatic telescopic rod, the movable end of the first automatic telescopic rod is fixedly connected with a chuck, the chuck is sleeved and fixedly connected with a first fixed ring, the first fixed ring is penetrated and fixedly connected with a second automatic telescopic rod, the movable end of the second automatic telescopic rod is fixedly connected with a second fixed ring, the bottom of the second fixed ring is fixedly connected with a scale adjusting plate, the bottom of the scale adjusting plate is fixedly connected with a bottom device, the bottom of the second fixed ring is fixedly connected with an elastic telescopic rod on one side of the scale adjusting plate, the bottom center position of the chuck is fixedly connected with a drill bit, the contraction of the first automatic telescopic rod controls the height of the drill bit, and the second automatic telescopic rod and the elastic telescopic rod control the height and the length of the scale adjusting plate, thereby facilitating the observation of the staff.

[0005] Preferably, the first motor bottom is fixedly connected with the support, and the first rotating shaft penetrates through the support and is rotationally connected with the support.

[0006] Preferably, the bottom device comprises a plate body, a mounting hole is formed in the top of the plate body, a mounting groove is formed in the inner wall of the mounting hole, a spring is fixedly connected with the inner wall of the mounting groove, a sliding block is fixedly connected with the end of the spring away from the inner wall of the mounting groove, a sleeve is fixedly connected with the bottom of the plate body and communicates with the mounting hole, a fixed end of a third automatic telescopic rod is fixedly connected with the part of the bottom of the plate body on one side of the sleeve, a spherical shell is fixedly connected with the movable end of the third automatic telescopic rod, a spherical body is slidably connected with the inner wall of the spherical shell, and a limiting plate is fixedly connected with the bottom of the spherical body.

[0007] Preferably, the top of the plate body is fixedly connected with the elastic telescopic rod, and the part of the top of the plate body on one side of the elastic telescopic rod is fixedly connected with the scale adjusting plate.

[0008] Preferably, the mixing device comprises a box body and a base plate, a first pipeline is communicated with the top of the box body, the water outlet end of a first water pump is communicated with the end of the first pipeline away from the box body, the water inlet end of the first water pump is communicated with a second pipeline, the ends of the alkali material pipe and the acid material pipe away from the third pipeline are respectively communicated with the two sides of the end of the second pipeline away from the first water pump, the first electric control valve is arranged on the alkali material pipe, the alkali material pipe is communicated with an alkali box at the bottom penetrating through the end of the alkali material pipe away from the third pipeline, the bottom of the alkali box is fixedly connected with the base plate, the second electric control valve is arranged on the acid material pipe, the acid material pipe is communicated with an acid box at the bottom penetrating through the end of the acid material pipe away from the third pipeline, the bottom of the acid box is fixedly connected with the base plate, the top of the box body is fixedly connected with the first water pump, and a push type stirrer is rotationally connected with the bottom of the inner wall of the box body.

[0009] Preferably, the bottom of the box body is fixedly connected with the bottom plate, and the bottom of the base plate is fixedly connected with the bottom plate.

[0010] Preferably, the top of the box body is fixedly connected with the flushing device, and the top of the box body is communicated with the feeding port.

[0011] Preferably, the flushing device comprises a fifth pipeline, one end of the fifth pipeline is communicated with the water inlet end of a second water pump, the water outlet end of the second water pump is communicated with a sixth pipeline, the side of the end of the sixth pipeline away from the second water pump is fixedly connected with a third motor through a motor support, the driving shaft of the third motor penetrates the sixth pipeline and is fixedly connected with a first fan blade, one side of the sixth pipeline is communicated with an eighth pipeline, the end of the eighth pipeline away from the sixth pipeline is communicated with a quick-setting agent tank, the mixed liquid is extracted and the quick-setting agent is put in through the second water pump, and the first fan blade and the second fan blade are used for stirring and mixing to the maximum extent.

[0012] Preferably, the second water pump bottom is fixedly connected with the tank body, the quick-setting agent tank bottom is fixedly connected with the bottom plate, and the fifth pipeline end away from the second water pump is communicated with the tank body.

[0013] The coal mine fluidized mining fissure evolution and seepage characteristic visualization test device has the following beneficial effects: 1. The coal mine fluidized mining fissure evolution and seepage characteristic visualization test device is provided with a drilling device, the drilling device is designed, a first motor drives a first rotating shaft to rotate, and then drives a first automatic telescopic rod and a chuck to rotate, rotation drilling of a drill bit is realized, a second automatic telescopic rod and a second fixed ring enable a scale adjusting plate and an elastic telescopic rod to be lowered synchronously with the drill bit until the scale adjusting plate and the elastic telescopic rod stop lowering and then drilling is started, so that the drilling depth can be clearly observed during drilling, and observation is facilitated.

[0014] 2. The coal mine fluidized mining fissure evolution and seepage characteristic visualization test device is provided with a bottom device, the bottom device is designed, a plate body in the bottom device serves as a foundation support, an assembly groove on the plate body cooperates with a spring and a sliding block, the normal work of the drill bit is not affected, and the drill bit is protected from being damaged in the non-working condition. Meanwhile, the setting of a sleeve further facilitates positioning of the drill bit during work, ensures accurate drilling operation, and the combined design of a third automatic telescopic rod, a spherical shell and a ball enables the bottom device to adapt to relatively complex terrain conditions, enables the drill bit to be adjusted to an optimal drilling angle according to actual needs, and the setting of a limiting plate effectively limits the rotation range of the ball and provides support for the bottom device, and ensures stability and controllability during the adjustment process.

[0015] 3. The coal mine fluidized mining fissure evolution and seepage characteristic visualization test device is provided with a mixing device, different substances are mixed in proportion by the mixing device, the actual environment in coal mining is simulated, and the change of liquid PH is automatically adjusted through rotation, so that the whole experiment is more abundant and real.

[0016] 4. The coal mine fluidized mining fissure evolution and seepage characteristic visualized test device is provided with a flushing device, and the flushing device draws the mixed liquid out from the sixth pipeline through the second water pump, transmits to the first fan blade and the second fan blade through the first bearing, the second rotating ring and the like components, forms high-speed rotating water flow, flushes the fissure after drilling, thereby simulating the seepage characteristic in the coal mine fluidized mining process, and meanwhile can enhance the mixing degree of the accelerator and the mixed liquid. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the coal mine fluidized mining fissure evolution and seepage characteristic visualized test device. Figure 2 It is a structural schematic view of the coal mine fluidized mining fissure evolution and seepage characteristic visualized test device. Figure 3 It is a structural schematic view of the drilling device. Figure 4 It is a structural schematic view of the bottom device. Figure 5 It is a structural schematic view of the mixing device. Figure 6 It is a structural schematic view of the mixing device. Figure 7 It is a structural schematic view of the flushing device. Figure 8 It is a structural schematic view of the flushing device.

[0018] In the figure: 1, bottom plate; 2, experimental device; 3, support; 4, drilling device; 41, first motor; 42, first automatic telescopic rod; 43, chuck; 44, first fixed ring; 45, second automatic telescopic rod; 46, second fixed ring; 47, scale adjusting plate; 48, drill bit; 49, elastic telescopic rod; 410, bottom device; 4101, plate body; 4102, assembly groove; 4103, spring; 4104, sliding block; 4105, sleeve; 4106, third automatic telescopic rod; 4107, spherical shell; 4108, ball; 4109, limiting plate; 41010, assembly hole; 411, first rotating shaft; 5, mixing device; 51, box body; 53, first pipeline; 54, first water pump; 55, second pipeline; 56, alkali material pipe; 57, base plate; 58, alkali box; 59, acid box; 510, first electric control valve; 511, second electric control valve; 512, push type stirrer; 513, acid material pipe; 514, third pipeline; 6, flushing device; 61, fifth pipeline; 62, second water pump; 63, sixth pipeline; 67, first fan blade; 613, eighth pipeline; 614, accelerator box; 617, third motor; 7, feeding port. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0020] The first embodiment, please refer to Figures 1-2 The present application provides a technical solution: a coal mine fluidized mining fracture evolution and seepage characteristic visualization test device, comprising a bottom plate 1, the top of the bottom plate 1 is fixedly connected with a support 3, the top of the support 3 is fixedly connected with a drilling device 4, the top of the bottom plate 1 is fixedly connected with an experimental device 2 on one side of the support 3, the top of the bottom plate 1 is fixedly connected with a mixing device 5 on one side of the experimental device 2, the top of the mixing device 5 is fixedly connected with a flushing device 6, and the top of the mixing device 5 is communicated with a feed inlet 7 on one side of the flushing device 6. The drilling device 4 comprises a first motor 41, the driving end of the first motor 41 is fixedly connected with a first rotating shaft 411, the bottom of the first rotating shaft 411 is fixedly connected with the fixed end of a first automatic telescopic rod 42, the movable end of the first automatic telescopic rod 42 is fixedly connected with a chuck 43, the chuck 43 is sleeved and fixedly connected with a first fixed ring 44, the first fixed ring 44 is penetrated and fixedly connected with a second automatic telescopic rod 45, the movable end of the second automatic telescopic rod 45 is fixedly connected with a second fixed ring 46, the bottom of the second fixed ring 46 is fixedly connected with a scale adjusting plate 47, the bottom of the scale adjusting plate 47 is fixedly connected with a bottom device 410, the bottom of the second fixed ring 46 is fixedly connected with an elastic telescopic rod 49 on one side of the scale adjusting plate 47, the bottom center position of the chuck 43 is fixedly connected with a drill bit 48, the bottom of the first motor 41 is fixedly connected with the support 3, and the first rotating shaft 411 penetrates through the support 3 and is rotationally connected with the support 3.

[0021] In use, the first motor 41 is started, the first motor 41 drives the first rotating shaft 411 to start rotating, the first rotating shaft 411 drives the first automatic telescopic rod 42 to rotate, and then the chuck 43 rotates, the chuck 43 drives the drill bit 48 to rotate, and meanwhile, the position and angle of the drill bit 48 can be adjusted according to actual needs through the first automatic telescopic rod 42 and the second automatic telescopic rod 45, the bottom device 410 helps the drill bit 48 to be effectively positioned, the elastic telescopic rod is used to control the telescopic amount of the scale adjusting plate, the scale adjusting plate 47 can be conveniently observed and the descending depth of the drill bit 48 is recorded, while the drill bit 48 is drilling, corresponding materials can be added into the mixing device 5 through the feeding port 7, the materials are mixed by the mixing device 5, and then the drilling position is flushed by the flushing device 6, so that the actual situation in the process of coal mine fluidized mining is simulated, and the experimental device 2 can monitor and record the crack evolution and seepage characteristics in real time, thereby providing accurate data support for subsequent research and analysis.

[0022] The second embodiment, please refer to Figures 1-3 On the basis of the first embodiment, the application provides a technical scheme: the bottom device 410 comprises a plate body 4101, a mounting hole 41010 is formed in the top of the plate body 4101, a mounting groove 4102 is formed in the inner wall of the mounting hole 41010, a spring 4103 is fixedly connected to the inner wall of the mounting groove 4102, a sliding block 4104 is fixedly connected to the end, away from the inner wall of the mounting groove 4102, of the spring 4103, a sleeve 4105 in communication with the mounting hole 41010 is fixedly connected to the bottom of the plate body 4101, a fixed end of a third automatic telescopic rod 4106 is fixedly connected to the part of the bottom of the plate body 4101 on one side of the sleeve 4105, a spherical shell 4107 is fixedly connected to the movable end of the third automatic telescopic rod 4106, a spherical body 4108 is slidably connected to the inner wall of the spherical shell 4107, a limiting plate 4109 is fixedly connected to the bottom of the spherical body 4108, the plate body 4101 is fixedly connected with the elastic telescopic rod 49 at the top, and the part of the plate body 4101 on the elastic telescopic rod 49 is fixedly connected with the scale adjusting plate 47.

[0023] In use, the bottom device 410 is installed at a designated position, when adjustment is required, the third automatic telescopic rod 4106 starts to work, the movable end drives the spherical shell 4107 to move, the ball 4108 in the spherical shell 4107 rotates, and then drives the limiting plate 4109 to move to a suitable position, so that the position adjustment is realized, and the drill bit 48 pushes the sliding block 4104 when working, so that the sliding block 4104 and the spring 4103 are compressed in the assembly groove 4102. The top of the plate body 4101 is fixedly connected with the elastic telescopic rod 49 and the scale adjusting plate 47, so that the elastic telescopic rod 49 can be elastically telescoped according to actual needs, and the scale adjusting plate 47 can accurately display the telescoping length, so that the operator can accurately master the adjustment range. After work, the drill bit 48 is retracted, the spring 4103 is rebounded to drive the sliding block 4104 to return to the initial position, and the drill bit 48 is protected to prevent accidental damage.

[0024] The third embodiment, please refer to Figures 1-7 On the basis of the second embodiment, the application provides a technical scheme: the mixing device 5 comprises a box body 51 and a base plate 57, the top of the box body 51 is communicated with a first pipeline 53, the water outlet end of a first water pump 54 is communicated with one end of the first pipeline 53 away from the box body 51, the water inlet end of the first water pump 54 is communicated with a second pipeline 55, the two sides of one end of the second pipeline 55 away from the first water pump 54 are respectively communicated with an alkali material pipe 56 and an acid material pipe 513, the alkali material pipe 56 is provided with a first electric control valve 510, the alkali material pipe 56 penetrates through the bottom to be communicated with an alkali material box 58 away from the third pipeline 514, the bottom of the alkali material box 58 is fixedly connected with the base plate 57, the acid material pipe 513 is provided with a second electric control valve 511, the acid material pipe 513 penetrates through the bottom to be communicated with an acid material box 59 away from the third pipeline 514, the bottom of the acid material box 59 is fixedly connected with the base plate 57, the top of the box body 51 is fixedly connected with the first water pump 54, a push type stirrer 512 is rotationally connected to the inner wall bottom of the box body 51, the bottom of the box body 51 is fixedly connected with the bottom plate 1, the bottom of the base plate 57 is fixedly connected with the bottom plate 1, the top of the box body 51 is fixedly connected with the flushing device 6, and the top of the box body 51 is communicated with the feed inlet 7.

[0025] In use, the acid and base materials are placed in the acid material box 59 and the base material box 58 respectively, and the flow of the acid and base materials in the base material pipe 56 and the acid material pipe 513 is controlled by opening and closing the first electric control valve 510 and the second electric control valve 511 according to actual requirements, the first water pump 54 is started, the first water pump 54 draws the materials in the acid material box 59 or the base material box 58 through the second pipe 55, and then the materials are transported into the box 51 through the first pipe 53. At the same time, other raw materials that need to be mixed are put into the box 51 from the feeding port 7, after the materials are all put into the box 51, the advancing stirrer 512 is started to fully stir and mix the materials in the box 51, and after the mixing is completed, the flushing device 6 draws the mixed liquid.

[0026] The fourth embodiment, please refer to Figures 1-8 On the basis of the third embodiment, the flushing device 6 comprises a fifth pipe 61, one end of the fifth pipe 61 is communicated with the water inlet end of a second water pump 62, the water outlet end of the second water pump 62 is communicated with a sixth pipe 63, the side of the end of the sixth pipe 63 away from the second water pump 62 is fixedly connected with a third motor 617 through a motor support, the driving shaft of the third motor 617 penetrates through the sixth pipe 63 and is fixedly connected with a first fan blade 67, one side of the sixth pipe 63 is communicated with an eighth pipe 613, the end of the eighth pipe 613 away from the sixth pipe 63 is communicated with a quick-setting agent box 614, the bottom of the second water pump 62 is fixedly connected with the box 51, the bottom of the quick-setting agent box 614 is fixedly connected with the bottom plate 1, and the end of the fifth pipe 61 away from the second water pump 62 is communicated with the box 51.

[0027] In use, the second water pump 62 is started, the second water pump 62 draws the mixed liquid in the box 51 through the fifth pipe 61 and transports it into the sixth pipe 63, an appropriate amount of quick-setting agent can be drawn from the quick-setting agent box 614 through the eighth pipe 613 and added to the liquid in the sixth pipe 63 to realize the preliminary mixing of the mixed liquid and the quick-setting agent, the mixed liquid is transported to the first bearing 64 through the sixth pipe 63, then flows into the first rotating ring 65, the driving shaft of the third motor 617 drives the first fan blade 67 to rotate, the first fan blade 67 drives the second fan blade 68 to rotate synchronously through the connecting block 615, and the second fan blade 68 drives the second rotating ring 610 to rotate, in this process, the third motor 617 is started, the driving shaft of the third motor 617 drives the connecting block 615 to rotate, which provides power for the entire flushing device 6, and makes the rotation of the first fan blade 67 and the second fan blade 68 more stable and powerful, so as to realize the full mixing of the quick-setting agent and the liquid, and the shell 616 plays a protective role in the mixing process to prevent flowing into the outside.

[0028] Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art and related fields without creative labor should belong to the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application are implemented according to the conventional means in the art, if not specifically described and limited.

Claims

1. A visualization test device for coal mine fluidized mining fracture evolution and seepage characteristics, characterized in that: The utility model provides a kind of experimental device, including bottom plate (1), the top fixed connection of bottom plate (1) is connected with support (3), the top fixed connection of support (3) is connected with drilling device (4), the portion fixed connection of bottom plate (1) top in experimental device (2) one side of support (3) is connected with mixing device (5), the portion fixed connection of bottom plate (1) top in mixing device (5) one side of experimental device (2) is connected with flushing device (6), the top fixed connection of mixing device (5) is connected with flushing device (6), the portion communication of mixing device (5) top in flushing device (6) one side has feed inlet (7); ​ The drilling device (4) includes a first motor (41), the first motor (41) is fixedly connected with a first rotating shaft (411) at the drive end, the first rotating shaft (411) is fixedly connected with the fixed end of a first automatic telescopic rod (42) at the bottom, the first automatic telescopic rod (42) is fixedly connected with a chuck (43) at the movable end, the chuck (43) is sleeved and fixedly connected with a first fixed ring (44), the first fixed ring (44) is fixedly connected with a second automatic telescopic rod (45) penetratingly, the second automatic telescopic rod (45) is fixedly connected with a second fixed ring (46) at the movable end, the second fixed ring (46) is fixedly connected with a scale adjusting plate (47) at the bottom, the scale adjusting plate (47) is fixedly connected with a bottom device (410) at the bottom, the second fixed ring (46) is fixedly connected with an elastic telescopic rod (49) at the portion on one side of the scale adjusting plate (47) at the bottom, the chuck (43) is fixedly connected with a drill bit (48) at the bottom center position.

2. The coal mine fluidized mining fracture evolution and seepage characteristics visualization test device according to claim 1, characterized in that: The first motor (41) is fixedly connected with the support (3) at the bottom, and the first rotating shaft (411) penetrates through the support (3) and is rotatably connected with the support (3).

3. The coal mine fluidized mining fracture evolution and seepage characteristics visualization test device according to claim 2, characterized in that: The bottom device (410) includes a plate body (4101), the plate body (4101) is provided with an assembly hole (41010) at the top, an assembly groove (4102) is formed in the inner wall of the assembly hole (41010), a spring (4103) is fixedly connected with the inner wall of the assembly groove (4102), one end of the spring (4103) away from the inner wall of the assembly groove (4102) is fixedly connected with a sliding block (4104), the plate body (4101) is fixedly connected with a sleeve (4105) in communication with the assembly hole (41010) at the bottom, the plate body (4101) is fixedly connected with the fixed end of a third automatic telescopic rod (4106) at the portion on one side of the sleeve (4105) at the bottom, the third automatic telescopic rod (4106) is fixedly connected with a spherical shell (4107) at the movable end, the spherical shell (4107) is slidably connected with a spherical body (4108) in the inner wall, and the spherical body (4108) is fixedly connected with a limiting plate (4109) at the bottom.

4. The coal mine fluidized mining fracture evolution and seepage characteristics visualization test device according to claim 3, characterized in that: The plate body (4101) is fixedly connected with the elastic telescopic rod (49) at the top, and the plate body (4101) is fixedly connected with the scale adjusting plate (47) at the portion on one side of the elastic telescopic rod (49).

5. The coal mine fluidized mining fracture evolution and seepage characteristics visualization test device according to claim 4, characterized in that: The mixing device (5) comprises a box (51) and a base plate (57), the top of the box (51) is communicated with a first pipeline (53), one end of the first pipeline (53) away from the box (51) is communicated with the water outlet end of a first water pump (54), the water inlet end of the first water pump (54) is communicated with a second pipeline (55), the two sides of one end of the second pipeline (55) away from the first water pump (54) are respectively communicated with an alkali material pipe (56) and an acid material pipe (513), the alkali material pipe (56) is provided with a first electric control valve (510), the alkali material pipe (56) penetrates through to the bottom away from one end of the third pipeline (514) and is communicated with an alkali material box (58), the bottom of the alkali material box (58) is fixedly connected with the base plate (57), the acid material pipe (513) is provided with a second electric control valve (511), the acid material pipe (513) penetrates through to the bottom away from one end of the third pipeline (514) and is communicated with an acid material box (59), the bottom of the acid material box (59) is fixedly connected with the base plate (57), the top of the box (51) is fixedly connected with the first water pump (54), and the inner wall bottom of the box (51) is rotationally connected with a propelling type stirrer (512).

6. The coal mine fluidized mining fracture evolution and seepage characteristics visualization test device according to claim 5, characterized in that: The bottom of the box (51) is fixedly connected with the bottom plate (1), and the bottom of the base plate (57) is fixedly connected with the bottom plate (1).

7. The coal mine fluidized mining fracture evolution and seepage characteristics visualization test device according to claim 6, characterized in that: The top of the box (51) is fixedly connected with a flushing device (6), and the top of the box (51) is communicated with a feeding port (7).

8. The coal mine fluidized mining fracture evolution and seepage characteristics visualization test device according to claim 7, characterized in that: The flushing device (6) comprises a fifth pipeline (61), one end of the fifth pipeline (61) is communicated with the water inlet end of a second water pump (62), the water outlet end of the second water pump (62) is communicated with a sixth pipeline (63), one side of the sixth pipeline (63) away from the second water pump (62) is fixedly connected with a third motor (617) through a motor support, the driving shaft of the third motor (617) penetrates through the sixth pipeline (63) and is fixedly connected with a first fan blade (67), one side of the sixth pipeline (63) is communicated with an eighth pipeline (613), one end of the eighth pipeline (613) away from the sixth pipeline (63) is communicated with a quick-setting agent box (614).

9. The coal mine fluidized mining fracture evolution and seepage characteristics visualization test device according to claim 8, characterized in that: The bottom of the second water pump (62) is fixedly connected with the box (51), the bottom of the quick-setting agent box (614) is fixedly connected with the bottom plate (1), and one end of the fifth pipeline (61) away from the second water pump (62) is communicated with the box (51).

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