CN116773749A - Three-dimensional mining seepage simulation device and method for coal mine engineering - Google Patents
Three-dimensional mining seepage simulation device and method for coal mine engineering Download PDFInfo
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- CN116773749A CN116773749A CN202310761470.9A CN202310761470A CN116773749A CN 116773749 A CN116773749 A CN 116773749A CN 202310761470 A CN202310761470 A CN 202310761470A CN 116773749 A CN116773749 A CN 116773749A
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
Abstract
The application relates to a three-dimensional mining seepage simulation device and a three-dimensional mining seepage simulation method for coal mine engineering, wherein geological analogues are paved in a box body, and a coal bed is made of water-soluble materials; a pressure box and a water pressure gauge are arranged in the upper stratum and the lower stratum of the coal bed; supplying water to the coal seam through a first water inlet pipe to simulate the coal seam mining process; injecting water into the overburden formation through the second water inlet pipe to construct an aquifer above the coal seam; the first drain pipe is used for draining liquid after the coal bed is dissolved; the second drain pipe is used for draining water in the overlying stratum; acoustic emission detection probes and wave velocity detection probes are arranged above and beside the geological similar body; the monitoring control station is electrically connected with the pressure box, the water pressure meter, the acoustic emission detection probe and the wave speed detection probe. The application can accurately monitor the three-dimensional space development change condition of stratum cracks, physical and mechanical parameters of rock mass and structural characteristic parameter changes in the coal seam mining process, realizes multi-dimensional intelligent information acquisition, and the monitoring result is closer to the actual mining condition.
Description
Technical Field
The application belongs to the technical field of coal mining, and particularly relates to a three-dimensional mining seepage simulation device and method for coal mine engineering.
Background
Due to the complexity of mine engineering environment and the restriction of high cost of field test, the similar simulation test becomes an important scientific research means for reproducing underground engineering environment. Based on the similarity simulation theory, mine engineering environments under different conditions can be effectively realized, relevant technical parameters are obtained, and basis is provided for practical engineering application. The three-dimensional physical similarity simulation test can reproduce the engineering environment of the underground engineering structure or the rock stratum, so that the simulation process and the simulation result are closer to the reality. Therefore, before a construction scheme is selected, the influence of the construction process on surrounding rocks must be deeply understood, and a model test is one of the most effective means. The similarity simulation test is based on a similarity theory, simplifies complex and changeable observation objects in a scene, and performs a scientific test of simulation research indoors, and is widely applied to the field of mine development engineering.
The research of the actual influence of mining and water seepage coupling on the stratum is one of the precondition bases for solving a series of problems including water diversion crack development, mining disaster and the like. Due to the complexity of the stratum and the limitations of research means, the actual influence of the coupling effect of mining and water seepage on the stratum still lacks systematic research at present. The mine engineering construction process relies on site in-situ monitoring means to early warn disasters, and although construction safety is guaranteed to a certain extent, site in-situ monitoring research is more a posterior analysis, and further improvement of evolution reliability of an early warning mechanism is prevented. Therefore, it is necessary to develop indoor simulation tests with multiple types and multiple influencing factors.
However, the existing simulation test device has single monitoring parameters on similar stratum, and generally only one type of monitoring component is arranged on a single side of the stratum, so that the three-dimensional space development change condition of stratum cracks, physical mechanical parameters of rock mass and structural characteristic parameter changes in the coal seam mining process can not be accurately monitored at the same time, and the simulation result of the existing simulation test device has obvious limitation in reflecting the field working condition. In addition, the bottom plate of the box body of the existing simulation test device is horizontal, generally only horizontal parallel stratum can be simulated, and often inclined similar stratum cannot be simulated; alternatively, while it is possible to fabricate a sloped like formation, the process of fabricating a sloped formation is time consuming and labor intensive; in addition, the sealing performance of the box body of the existing test device and the similar stratum is poor, after water is injected into the aquifer, water leakage is easy to occur between the similar stratum and the inner wall of the box body, water pressure is affected, and accuracy of a test result is poor.
Disclosure of Invention
In view of the above analysis, embodiments of the present invention are directed to a three-dimensional mining-induced seepage simulation device and method for coal mine engineering, which are used for solving one or more of the above problems in the prior art.
The purpose of the invention is realized in the following way:
a three-dimensional mining seepage simulation device for coal mine engineering, comprising:
the box body is provided with a steel frame, and four coamings and a bottom plate are arranged on the steel frame to form an accommodating space;
the geological similar body is provided with a coal bed, an overburden stratum positioned above the coal bed and a underburden stratum positioned below the coal bed, and the coal bed, the overburden stratum and the underburden stratum are arranged in the accommodating space according to a stratum lithology structure of the stratum to be simulated; the coal seam is made of water-soluble materials; a pressure box and a water pressure gauge are arranged in the overlying stratum and the underlying stratum;
a first inlet conduit for supplying water to the coal seam to simulate a coal seam mining process by dissolving the coal seam into a liquid;
the second water inlet pipe is used for injecting water into the overlying stratum so as to construct an aquifer above the coal seam;
a first drain configured to drain the liquid after the coal seam is dissolved;
a second drain configured to drain water from the overburden;
the acoustic emission detection probes are arranged above and beside the geological similar body and are configured to monitor stratum crack evolution conditions in the drainage process and spatially locate cracks;
The wave speed detection probes are arranged above and beside the geological similar body and are configured to monitor rock physical and mechanical parameters and structural characteristic parameter changes of the geological similar body;
and the monitoring control station is electrically connected with the pressure box, the water pressure gauge, the acoustic emission detection probe and the wave speed detection probe, and is used for receiving monitoring data transmitted by the pressure box, the water pressure gauge, the acoustic emission detection probe and the wave speed detection probe in real time, and analyzing based on the monitoring data to obtain a simulation result.
Further, the first drain pipe is provided with a first water inlet and a first water outlet, the first water inlet extends into the accommodating space from the bottom of the box body upwards, and the first water inlet is positioned on the bottom surface of the coal seam; the first water outlet is positioned outside the box body and is provided with a first water discharge switch; the second drain pipe is provided with a second water inlet and a second water outlet, the second water inlet extends upwards into the accommodating space from the bottom of the box body, and the second water inlet at least extends into an overlying strata above the coal seam; the second water outlet is positioned outside the box body and is provided with a second drainage switch.
Further, the number of the second drain pipes is three, the second drain pipes comprise a second drain pipe a, a second drain pipe b and a second drain pipe c, a second water inlet of the second drain pipe a penetrates out of the top surface of the overlying stratum, and a second water inlet of the second drain pipe b is higher than a second water inlet of the second drain pipe c.
Further, still include water supply installation, water supply installation includes water tank and water pump, the water pump through water supply branch pipeline with first inlet tube and second inlet tube connection, be equipped with first water inlet switch on the first inlet tube, be equipped with the second water inlet switch on the second inlet tube.
Further, the overlying stratum and the underlying stratum comprise different lithologic strata, and mica layers are paved between the coal bed and the adjacent lithologic strata and between the different lithologic strata.
Further, the coal beds are arranged in a blocking mode on a plane, two adjacent coal beds are separated by a water-proof piece, the top end of the water-proof piece is embedded in the lower portion of the overlying stratum in advance, and the bottom end of the water-proof piece is embedded in the top of the underlying stratum in advance; each coal seam is connected with a first water inlet pipe.
Further, the overlying strata comprise sandy mud strata, middle sand strata and fine sand strata which are arranged from top to bottom; the underburden comprises a fine sandstone layer and a shale layer which are arranged from top to bottom; the middle sandstone layer is used as an aqueous layer, and the water outlet of the second water inlet pipe is positioned in the middle sandstone layer; the part of the second drain pipe located in the aquifer is a drain section, and a plurality of water outlets are formed in the side wall of the drain section.
Further, the steel frame is provided with steel frame vertical rods and rectangular transverse frames, and the rectangular transverse frames are connected to the lower parts of the four steel frame vertical rods; the steel frame vertical rods comprise a first vertical rod, a second vertical rod, a third vertical rod and a fourth vertical rod, and the first vertical rod, the second vertical rod, the third vertical rod and the fourth vertical rod are arranged at four corners of the rectangular transverse frame in parallel according to the anticlockwise vertical direction to form four vertical edges of a cuboid; four bounding walls and a bottom plate are connected with the vertical rod of the steel frame and the rectangular transverse frame in a sealing way to form an accommodating space.
Further, the box body is also provided with a cover plate, an opening communicated with the atmosphere is formed in the middle of the cover plate, an annular sealing body is arranged on the lower surface of the cover plate around the opening, and the circumferential side wall surface of the annular sealing body is in sealing contact with the inner wall surface of the coaming; the lower surface of the annular sealing body is in extrusion sealing contact with the top surface of the geological similar body; or the top surface of the geological similar body is higher than the lower surface of the annular sealing body, and at least part of the geological similar body is in sealing contact with the inner side wall surface of the annular sealing body;
further, the outer part of the annular sealing body is coated with a rubber layer.
Further, a sealing annular bulge is arranged on the inner wall surface of the top of the coaming, and the sealing annular bulge is arranged on the inner wall surface of the coaming; when the geological similar is paved, the sealing protrusion is buried in the upper stratum.
Further, the connection points of the rectangular transverse frame and the third vertical rod and the fourth vertical rod are provided with a first height, and the connection points of the rectangular transverse frame and the first vertical rod and the second vertical rod are provided with a second height; wherein the first height is a fixed value and the second height is adjustable.
Further, the box body further comprises a base, wherein the base is provided with a fixed slot and a movable slot; the lower ends of the third vertical rod and the fourth vertical rod are fixedly inserted into the fixed slot, and the third vertical rod and the fourth vertical rod are positioned on a first plane; the first vertical rod and the second vertical rod are arranged in the movable slot through a transverse position adjusting assembly, and the first vertical rod and the second vertical rod are positioned on a second plane; wherein the lateral position adjustment assembly is configured to adjust a vertical distance between the first plane relative to the second plane.
Further, one side of the rectangular transverse frame is rotationally connected with the third vertical rod and the fourth vertical rod; the other side of the rectangular transverse frame is spliced with the first vertical rod and the second vertical rod.
Further, the rectangular transverse frame comprises a first transverse rod, a second transverse rod, a third transverse rod and a fourth transverse rod which are sequentially connected; the first end of the first cross rod and the first end of the same side of the third cross rod are respectively provided with a rotary connecting part, and the third vertical rod and the fourth vertical rod are provided with rotary matching parts matched with the rotary connecting parts; the second end of the first cross rod and the second end of the same side of the third cross rod are respectively provided with an inserting part, and a plurality of longitudinally arranged connecting slots are formed in the third vertical rod and the fourth vertical rod so as to allow the inserting parts to be inserted.
Further, the engagement slot has a slot bottom surface, wherein an included angle between the slot bottom surface and the horizontal direction is 0 ° -60 °, and an included angle between the slot bottom surface and the horizontal direction is sequentially increased from bottom to top, so that after the insertion portion is inserted into the engagement slot, a lower surface of the insertion portion is in surface contact with the slot bottom surface.
Further, the rotation connecting portion comprises a circular arc-shaped groove, the rotation matching portion comprises a spherical structure, the spherical structure is arranged in the side wall grooves on the third vertical rod and the fourth vertical rod, and the top of the spherical structure can be installed in the circular arc-shaped groove to realize rotation connection.
Further, the third vertical rod and the fourth vertical rod are provided with axial center holes, the center holes penetrate through the plurality of connection slotted holes, the center holes are threaded holes, the jacking screw is installed in the threaded holes, and the plugging portion is jacked by rotating the jacking screw.
Further, an elastic rubber layer is arranged between the rotation connecting part and the rotation matching part; an elastic rubber layer is arranged on the bottom surface of the connecting slot.
Further, the transverse position adjusting assembly comprises a first screw rod, a first screw sleeve, a second screw rod and a second screw sleeve, the first screw sleeve and the second screw sleeve are respectively fixed on the inner walls of the two sides of the movable slot, and the axes of the first screw sleeve and the second screw sleeve are collinear and are horizontally arranged; the first screw rod is in threaded connection in first swivel nut, and second screw rod is in threaded connection in the second swivel nut, the lower extreme of first montant and second montant is located between first screw rod and the second screw rod, through the spiral first screw rod and second screw rod realize with first montant and second montant are fixed appointed position in the movable slot.
Further, the horizontal position adjusting component comprises a first screw rod and a second screw rod, a first threaded hole and a second threaded hole are respectively formed in the inner walls of two sides of the movable slot, the first screw rod is in threaded connection with the first threaded hole, the second screw rod is in threaded connection with the second threaded hole, the lower ends of the first vertical rod and the second vertical rod are located between the first screw rod and the second screw rod, and the first screw rod and the second screw rod are used for fixing the first vertical rod and the second vertical rod at specified positions in the movable slot.
Further, the auxiliary transverse frame is arranged above the rectangular transverse frame and parallel to the rectangular transverse frame and is used for auxiliary fixing of the four vertical rods.
On the other hand, the three-dimensional mining seepage simulation method for the coal mine engineering, which uses the three-dimensional mining seepage simulation device for the coal mine engineering, comprises the following steps:
step one: assembling the box body; according to the stratum structure to be simulated, paving a similar geologic body in the box body;
step two: injecting water into the water-containing layer, and injecting water into the coal layer according to a mining scheme to simulate a mining process; meanwhile, the pressure box, the water pressure gauge, the acoustic emission detection probe and the wave velocity detection probe monitor various parameters in the geological similar body in the coal seam mining process in real time, and a monitoring result is obtained.
Compared with the prior art, the invention has at least one of the following beneficial effects:
a) According to the three-dimensional mining seepage simulation device for the coal mine engineering, provided by the invention, the acoustic emission detection probes and the wave velocity detection probes are arranged on the side and the upper side of the similar geologic body, so that the three-dimensional space development change condition of formation cracks and the physical mechanical parameters and structural characteristic parameter changes of a rock mass in the coal seam mining process can be accurately monitored simultaneously, a complete real-time dynamic monitoring system for three-dimensional space development of a mine is formed, and the pressure boxes and the water pressure meters embedded in the geologic similar body are combined to realize multi-dimensional intelligent information acquisition, so that the simulation result can reflect the site working condition more truly, and technical support is provided for analyzing phenomena occurring in the mine development process.
b) The three-dimensional mining seepage simulation device for the coal mine engineering provided by the invention has the advantages that the heights of at least one connecting point between the two sides of the rectangular transverse frame and the vertical rod of the steel frame can be adjusted, the angle between the bottom plate and the horizontal plane can be adjusted, and further, inclined stratum can be simulated, the structure is simple, the operation is convenient, and the stratum with different inclined angles can be simulated.
c) According to the three-dimensional mining seepage simulation device for the coal mine engineering, the annular sealing body is arranged at the lower part of the cover plate of the box body, and/or the sealing annular bulge is arranged on the inner wall surface of the top of the coaming, so that the communication between the similar geologic body and the outside atmosphere can be ensured, and the similar geologic body is identical to the actual geologic condition; and can also guarantee sealing performance between similar geologic body and the box bounding wall, can effectively avoid flowing out outside the box along the internal face of bounding wall when flooding to similar geologic body, the test result of simulation is more accurate.
d) The three-dimensional mining seepage simulation method for the coal mine engineering is simple to operate, and the simulation result is closer to the actual situation.
Drawings
In order to more clearly illustrate the embodiments of the present description or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present description, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a schematic structural diagram of a three-dimensional mining seepage simulation device for coal mine engineering;
FIG. 2 is a schematic view of an inclined formation disposed within a tank provided by the present invention;
FIG. 3 is a schematic diagram of a structure of a water inlet pipe paved inside a coal seam provided by the invention;
FIG. 4 is a schematic diagram of a box according to the present invention;
FIG. 5 is a second schematic structural diagram of the case according to the present invention;
FIG. 6 is a schematic view of the connection structure of the vertical rod, the horizontal rod and the base of the steel frame provided by the invention;
fig. 7 is a schematic structural diagram of a first vertical rod provided by the present invention;
FIG. 8 is a schematic view of a first cross bar according to the present invention;
FIG. 9 is a schematic view of a rectangular cross frame according to the present invention;
fig. 10 is a schematic structural view of a fourth vertical rod provided by the present invention;
FIG. 11 is a schematic structural view of a base according to the present invention;
fig. 12 is a schematic structural view of another base provided by the present invention.
Reference numerals:
1. coaming plate; 2. a bottom plate; 3. a coal seam; 4. coating a stratum; 4-1, sandy mud layer; 4-2, middle sandstone layer; 4-3, fine sand layers; 5. a subsurface formation; 5-1, fine sandstone layer; 5-2, shale layer; 6. a pressure cell; 7. a water pressure gauge; 8. a first water inlet pipe; 8-1, a first water inlet switch; 9. a second water inlet pipe; 9-1, a second water inlet switch; 10. a first drain pipe; 10-1, a first drain switch; 11. a second drain pipe; 11-1, a second drain switch; 11-2, a second drain pipe a;11-3, a second drain pipe b;11-4, a second drain pipe c; 12. an acoustic emission detection probe; 13. a wave velocity detection probe; 14. monitoring a control station; 15. a water tank; 16. a water pump; 17. a steel frame vertical rod; 17-1, a first vertical rod; 17-2, a second vertical rod; 17-3, a third vertical rod; 17-4, a fourth vertical rod; 17-5, linking slot holes; 17-6, tightly pushing the screw; 17-7, a spherical structure; 18. a rectangular transverse frame; 18-1, a first cross bar; 18-2, a second cross bar; 18-3, a third cross bar; 18-4, a fourth cross bar; 18-5, a plug-in part; 18-6, arc-shaped grooves; 19. a cover plate; 19-1, an opening; 19-2, an annular seal; 20. sealing the annular bulge; 21. a base; 21-1, a fixed slot; 21-2, a removable slot; 22. a lateral position adjustment assembly; 22-1, a first screw; 22-2, a first screw sleeve; 22-3, a second screw; 22-4, a second screw sleeve; 23. an auxiliary transverse frame; 24. and reserving a coal pillar.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. It should be noted that embodiments and features of embodiments in the present disclosure may be combined, separated, interchanged, and/or rearranged with one another without conflict. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the drawings, the size and relative sizes of elements may be exaggerated for clarity and/or descriptive purposes. While the exemplary embodiments may be variously implemented, the specific process sequences may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in reverse order from that described. Moreover, like reference numerals designate like parts.
When an element is referred to as being "on" or "over", "connected to" or "coupled to" another element, it can be directly on, connected or coupled to the other element or intervening elements may be present. However, when an element is referred to as being "directly on," "directly connected to," or "directly coupled to" another element, there are no intervening elements present. For this reason, the term "connected" may refer to physical connections, electrical connections, and the like, with or without intermediate components.
For descriptive purposes, the present disclosure may use spatially relative terms such as "top," "bottom," "below … …," "below … …," "under … …," "above … …," "upper," "above … …," "higher," and the like, relative to components to describe one component's relationship to another (other) component as illustrated in the figures.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, when the terms "comprises" and/or "comprising," and variations thereof, are used in the present specification, the presence of stated features, integers, steps, operations, elements, components, and/or groups thereof is described, but the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof is not precluded. It is also noted that, as used herein, the terms "substantially," "about," and other similar terms are used as approximation terms and not as degree terms, and as such, are used to explain the inherent deviations of measured, calculated, and/or provided values that would be recognized by one of ordinary skill in the art.
Example 1
In one embodiment of the present invention, as shown in fig. 1 to 3, a three-dimensional mining seepage simulation device for coal mine engineering is disclosed, comprising:
the box body is provided with a steel frame, and an accommodating space is formed by arranging four coamings 1 and a bottom plate 2 on the steel frame;
the geological similar body is provided with a coal seam 3, an overburden layer 4 positioned above the coal seam 3 and a underburden layer 5 positioned below the coal seam 3, and the coal seam 3, the overburden layer 4 and the underburden layer 5 are arranged in the accommodating space according to a stratum lithology structure of a stratum to be simulated; the coal seam 3 is made of water-soluble materials; a pressure box 6 and a water pressure gauge 7 are arranged in the overlying stratum 4 and the underlying stratum 5;
a first water inlet pipe 8 for supplying water to the coal seam 3 to simulate a coal seam 3 mining process by dissolving the coal seam 3 into a liquid;
a second water inlet pipe 9 for injecting water into the overburden 4 to build up an aquifer above the coal seam 3;
a first drainage pipe 10, the first drainage pipe 10 being configured to drain liquid after dissolution of the coal seam 3;
a second drain pipe 11, the second drain pipe 11 being configured to drain water in the overburden formation 4;
The acoustic emission detection probe 12 is arranged above and beside the geological similar body, and is configured to monitor formation crack evolution conditions in the process of draining water from the transverse direction and the longitudinal direction and spatially locate cracks;
a wave velocity detection probe 13, the wave velocity detection probe 13 being disposed above and beside the geologic analogue, configured to monitor changes in physical and mechanical parameters and structural feature parameters of the rock mass of the geologic analogue;
and the monitoring control station 14 is electrically connected with the pressure box 6, the water pressure meter 7, the acoustic emission detection probe 12 and the wave speed detection probe 13, and is used for receiving monitoring data transmitted by the pressure box 6, the water pressure meter 7, the acoustic emission detection probe 12 and the wave speed detection probe 13 in real time, and analyzing based on the monitoring data to obtain a simulation result. The acoustic emission detection probe 12 monitors the stratum crack evolution condition in the drainage process from multiple directions and spatially locates cracks; the density, hardness and elastic modulus of the rock can be calculated by the wave velocity emitted by the wave velocity detection probe 13. Water has a great influence on the propagation velocity of the wave and can therefore also be used for determining the groundwater level and for detecting cracks in the rock.
In this embodiment, the first drain pipe 10 has a first water inlet and a first water outlet, the first water inlet extends from the bottom of the box body upwards into the accommodating space, and the first water inlet is located at the bottom surface of the coal seam 3; the first water outlet is positioned outside the box body and is provided with a first water discharge switch 10-1; the second drain pipe 11 is provided with a second water inlet and a second water outlet, the second water inlet extends upwards into the accommodating space from the bottom of the box body, and the second water inlet at least extends into the overlying strata 4 above the coal seam 3; the second water outlet is positioned outside the box body, and a second water discharge switch 11-1 is arranged.
In the actual drainage process, a shaft is constructed upwards from the inside of a roadway, and the drainage process of a complete well and an incomplete well has differential influence on stratum. Based on this, the number of the second drain pipes 11 in this embodiment is three, including a second drain pipe a11-2, a second drain pipe b11-3, and a second drain pipe c11-4, wherein the second water inlet of the second drain pipe a11-2 passes through the top surface of the overburden layer 4, and the second water inlet of the second drain pipe b11-3 is higher than the second water inlet of the second drain pipe c 11-4. By providing three second drain pipes 11 of different heights, the drain water of the complete well and the incomplete well can be simulated.
In this implementation, colliery engineering three-dimensional mining-induced seepage flow analogue means still includes water supply installation, water supply installation includes water tank 15 and water pump 16, and water tank 15 splendid attire clear water, water tank 15 is connected to the water inlet end of water pump 16, and water supply branch line is connected to the water outlet end of water pump, water pump 16 through water supply branch line with first inlet tube 8 and second inlet tube 9 are connected, be equipped with first water inlet switch 8-1 on the first inlet tube, be equipped with second water inlet switch 9-1 and water gauge on the second inlet tube 9. The water tank 15 is arranged on one side of the tank body, the water tank 15 is connected with the first water inlet pipe and the second water inlet pipe through the water pump, the water injection pressure of the water pump is adjustable, and the water inlet and outlet quantity, the flow rate and the like in each pipe of the first water inlet pipe and the second water inlet pipe can be controlled through the valve.
In one alternative embodiment, the overburden layer 4 and the underburden layer 5 each include different lithologic formations, and mica layers are laid between the coal seam 3 and adjacent lithologic formations and between the different lithologic formations. Mica was laid down to simulate the formation layer so that the layer was visually apparent.
The mining mode is determined before the coal layer is paved. For example, when the coal seam is mined in a horizontal section, the coal seam 3 is arranged in a block manner on a plane when the coal seam is paved, two adjacent coal layers are separated by a water-proof piece, the top end of the water-proof piece is embedded in the lower part of the overlying stratum 4 in advance, and the bottom end of the water-proof piece is embedded in the top of the underlying stratum 5 in advance; each coal seam is connected with a first water inlet pipe 8; alternatively, the separator may be a plastic cloth. During simulation, the horizontal section mining simulation process can be realized by sequentially supplying water through corresponding water supply pipes according to the mining sequences of different coal seam blocks.
Further, a plurality of first water inlet pipes 8 are paved in the same layer of coal seam 4, as shown in fig. 3, 3 first water inlet pipes 8 are paved in the coal seam 4, three first water outlet pipes 10 are arranged below the coal seam 4, and a reserved coal pillar 24 is arranged on one side of the coal seam 4.
In this embodiment, the overburden layer 4 includes a sandy mud layer 4-1, a middle sand layer 4-2, and a fine sand layer 4-3 arranged from top to bottom; the underburden layer 5 comprises a fine sandstone layer 5-1 and a shale layer 5-2 which are arranged from top to bottom; wherein, four bounding wall 1 are organic glass boards, when laying geology analog in the box, can be in organic glass inside scale with the marker, guarantee to lay each layer thickness in the control range of similar material in-process. The geological similar body is made of similar materials, the coal bed is made of soluble materials such as salt, the sandy mud layer, the middle sand layer, the fine sand layer and the shale layer are made of gypsum, white powder, sand and cement according to different proportions according to the actual strength of the stratum, and the physical properties of the interlayer rock layer of the prepared geological similar body are the same as or similar to the physical parameters of the actual stratum to be simulated.
In this embodiment, the middle sandstone layer is used as the water-bearing layer, and the water outlet of the second water inlet pipe 9 is positioned in the middle sandstone layer; the part of the second drain pipe 11 located in the aquifer is a drain section, and a plurality of water outlets are arranged on the side wall of the drain section. By providing a plurality of water outlets in the drainage section, water at different positions in the aquifer can be caused to flow into the second drainage pipe 11 uniformly.
In this embodiment, the steel frame is a disassembly and assembly structure, the steel frame is provided with steel frame vertical rods 17 and rectangular transverse frames 18, and the rectangular transverse frames 18 are connected to the lower parts of the four steel frame vertical rods 17; the steel frame vertical rod 17 comprises a first vertical rod 17-1, a second vertical rod 17-2, a third vertical rod 17-3 and a fourth vertical rod 17-4, wherein the first vertical rod 17-1, the second vertical rod 17-2, the third vertical rod 17-3 and the fourth vertical rod 17-4 are arranged at four corners of a rectangular transverse frame 18 in parallel according to the anticlockwise vertical direction to form four vertical edges of a cuboid; the four coamings 1 and the bottom plate 2 are in sealing connection with the steel frame vertical rods 17 and the rectangular transverse frames 18 by adopting sealant to form an accommodating space, water leakage at the joint of the coaming 1 and the bottom plate 2 is avoided, and the detachable and reusable function is realized.
In order to prevent water supplied into a similar geologic body from flowing upward along the inner wall of the shroud 1, the case of the present embodiment has the following two sealing schemes:
in the first sealing scheme, as shown in fig. 4, the box body is further provided with a cover plate 19, an opening 19-1 communicated with the atmosphere is arranged in the middle of the cover plate 19, an annular sealing body 19-2 is arranged on the lower surface of the cover plate 19 around the opening 19-1, and the circumferential side wall surface of the annular sealing body 19-2 is in sealing contact with the inner wall surface of the coaming 1; the lower surface of the annular sealing body 19-2 is in extrusion sealing contact with the top surface of the geological similar body; alternatively, the top surface of the geologic analogue is higher than the lower surface of the annular sealing body 19-2, and at least part of the geologic analogue is in sealing contact with the inner side wall surface of the annular sealing body 19-2. Further, the outer part of the annular sealing body 19-2 is coated with a rubber layer, and the tightness is improved through an elastic rubber layer.
In a second sealing scheme, as shown in fig. 5, a sealing annular protrusion 20 is arranged on the top inner wall surface of the coaming 1, and the sealing annular protrusion 20 is arranged on the inner wall surface of the coaming 1 and is positioned above the aquifer; the sealing protrusion is buried inside the overburden layer 4 when the geologic analogue is laid.
By adopting the two sealing schemes, on one hand, the communication between the similar geologic body and the outside atmosphere can be ensured, and the similar geologic body is the same as the actual geologic condition; on the other hand, guarantee sealing performance between similar geologic body and the box bounding wall, can effectively avoid flowing out outside the box along the internal face of bounding wall 1 when flooding to similar geologic body, the test result of simulation is more accurate like this.
In this embodiment, the connection point between the rectangular transverse frame 18 and the third vertical rod 17-3 and the fourth vertical rod 17-4 has a first height, and the connection point between the rectangular transverse frame 18 and the first vertical rod 17-1 and the second vertical rod 17-2 has a second height; wherein the first height is a fixed value and the second height is adjustable. This arrangement allows the angle between the bottom plate 2 and the horizontal plane to be adjusted, and thus allows the inclined stratum to be simulated.
Further, the box body further comprises a base 21, wherein the base 21 is provided with a fixed slot 21-1 and a movable slot 21-2; the lower ends of the third vertical rod 17-3 and the fourth vertical rod 17-4 are fixedly inserted into the fixed slot 21-1, and the third vertical rod 17-3 and the fourth vertical rod 17-4 are positioned on a first plane; the first vertical rod 17-1 and the second vertical rod 17-2 are arranged in the movable slot 21-2 through a transverse position adjusting assembly 22, and the first vertical rod 17-1 and the second vertical rod 17-2 are positioned on a second plane; wherein the lateral position adjustment assembly 22 is configured to adjust a vertical distance between the first plane relative to the second plane.
In one alternative embodiment, one side of the rectangular transverse frame 18 is rotatably connected with the third vertical rod 17-3 and the fourth vertical rod 17-4; the other side of the rectangular transverse frame 18 is spliced with the first vertical rod 17-1 and the second vertical rod 17-2. The angle between the rectangular transverse frame 18 and the vertical rods is conveniently adjusted, so that the inclination angle of the bottom plate 2 is conveniently adjusted, the operation is convenient and quick, and the assembly efficiency of the box body is improved.
As shown in fig. 9, the rectangular cross frame 18 includes a first cross bar 18-1, a second cross bar 18-2, a third cross bar 18-3 and a fourth cross bar 18-4 that are sequentially connected, where the first cross bar 18-1, the second cross bar 18-2, the third cross bar 18-3 and the fourth cross bar 18-4 are connected to form a coplanar rectangular cross frame 18; the first end of the first cross bar 18-1 and the first end of the same side of the third cross bar 18-3 are respectively provided with a rotation connecting part, and the third vertical bar 17-3 and the fourth vertical bar 17-4 are provided with rotation matching parts matched with the rotation connecting parts; the second end of the first cross bar 18-1 and the second end of the same side of the third cross bar 18-3 are respectively provided with a plugging portion 18-5, and the third vertical bar 17-3 and the fourth vertical bar 17-4 are provided with a plurality of longitudinally arranged linking slots 17-5 for plugging the plugging portions 18-5, as shown in fig. 6.
Further, the engaging slot 17-5 has a slot bottom surface, the angle between the slot bottom surface and the horizontal direction is 0 ° -60 °, and the angle between the slot bottom surface and the horizontal direction increases sequentially from bottom to top, so that after the plugging portion 18-5 is inserted into the engaging slot 17-5, the lower surface of the plugging portion 18-5 can be in surface contact with the slot bottom surface. The above arrangement can further improve the sealability.
As shown in fig. 6, 8 and 10, the rotation connection portion includes a circular arc groove 18-6, the rotation fitting portion includes a spherical structure 17-7, the spherical structure 17-7 is disposed in side wall grooves on the third vertical rod 17-3 and the fourth vertical rod 17-4, and the top of the spherical structure 17-7 can be fitted into the circular arc groove 18-6 to achieve rotation connection.
As shown in fig. 6 to 7, the third vertical rod 17-3 and the fourth vertical rod 17-4 have axial central holes, the central holes pass through the plurality of engagement slots 17-5, the central holes are threaded holes, and the threaded holes are provided with tightening screws 17-6, and the tightening screws 17-6 are rotated to prop against the insertion parts 18-5. The tight screw rod in top can play the effect of fixed grafting portion on the one hand, and on the other hand has promoted the leakproofness of junction through extrusion grafting portion.
In one alternative embodiment, an elastic rubber layer is arranged between the rotation connecting part and the rotation matching part; an elastic rubber layer is arranged on the bottom surface of the connecting slot 17-5. The arrangement can improve the tightness under the action of gravity of the geological similar body and the downward pressing and jacking action of the jacking screw rod.
In this embodiment, the lateral position adjustment assembly 22 has two configurations.
The first structure of the lateral position adjusting assembly 22 is shown in fig. 11, the lateral position adjusting assembly 22 comprises a first screw 22-1, a first screw sleeve 22-2, a second screw 22-3 and a second screw sleeve 22-4, the first screw sleeve 22-2 and the second screw sleeve 22-4 are respectively fixed on the inner walls of the two sides of the movable slot 21-2, and the axes of the first screw sleeve 22-2 and the second screw sleeve 22-4 are collinear and horizontally arranged; the first screw rod 22-1 is in threaded connection with the first screw sleeve 22-2, the second screw rod 22-3 is in threaded connection with the second screw sleeve 22-4, the lower ends of the first vertical rod 17-1 and the second vertical rod 17-2 are located between the first screw rod 22-1 and the second screw rod 22-3, and the first vertical rod 17-1 and the second vertical rod 17-2 are fixed at the appointed position in the movable slot 21-2 through screwing the first screw rod 22-1 and the second screw rod 22-3. By screwing the length of the first screw 22-1 in the first barrel 22-2 and the length of the second screw 22-3 in the second barrel 22-4, positional adjustment between the two screws is achieved.
The lateral position adjusting assembly 22 of the second structure is shown in fig. 6 and 12, the lateral position adjusting assembly 22 includes a first screw 22-1 and a second screw 22-3, the inner walls of two sides of the movable slot 21-2 are respectively provided with a first threaded hole and a second threaded hole, the first screw 22-1 is in threaded connection with the first threaded hole, the second screw 22-3 is in threaded connection with the second threaded hole, the lower ends of the first vertical rod 17-1 and the second vertical rod 17-2 are located between the first screw 22-1 and the second screw 22-3, and the first vertical rod 17-1 and the second vertical rod 17-2 are fixed at the designated positions in the movable slot 21-2 by screwing the first screw 22-1 and the second screw 22-3. By screwing the length of the first screw 22-1 in the first screw hole and the length of the second screw 22-3 in the second screw hole, the position adjustment between the two screws is realized.
The end parts of the first screw rod 22-1 and the second screw rod 22-3 are further provided with a supporting plate, and the supporting plate can be in contact with the side wall surfaces of the first vertical rod 17-1 and the second vertical rod 17-2, so that the first vertical rod 17-1 and the second vertical rod 17-2 can be vertically arranged.
Further, as shown in fig. 4, the steel frame further includes an auxiliary transverse frame 23, where the auxiliary transverse frame 23 is disposed above the rectangular transverse frame 18 and parallel to the rectangular transverse frame 18, and is used for fixing four vertical rods in an auxiliary manner, so that stability of the steel frame can be improved, and deformation of the laid geological analogues or in the high-pressure flushing process can be prevented.
In this embodiment, the three-dimensional mining-induced seepage-like simulation device for coal mine engineering further includes a hydraulic loading device configured to apply downward pressure to the geological analog through its top to simulate formation pressure above the geological analog. The existence of a deep stress field can be realized through hydraulic loading, the reduction degree is high, the accuracy of a stress loading environment is improved, the complex stratum characteristics under the influence of the pressure of a stratum covered on laboratory reduction can be furthest restored, the geological engineering environment and the construction process are reproduced, the test precision is high, and the data is reliable.
The embodiment also discloses a three-dimensional mining seepage simulation method for the coal mine engineering, and the three-dimensional mining seepage simulation device for the coal mine engineering is used; the simulation method comprises the following steps:
step one: assembling the box body; according to the stratum structure to be simulated, paving a similar geologic body in the box body;
specifically, when the box body is assembled, four coamings 1 and a bottom plate 2 are arranged on a steel frame in a sealing way to form an accommodating space; paving a coal bed 3, an overburden stratum 4 and a underburden stratum 5 in the accommodating space according to the structure of the stratum to be simulated; in the process of paving the geological similar body, embedding the pressure box 6, the water pressure gauge 7, the first water inlet pipe 8, the second water inlet pipe 9, the first water outlet pipe 10 and the second water outlet pipe 11 into corresponding layers of the similar geological body in advance; after the pavement of the geological similar body is completed, arranging a plurality of groups of acoustic emission detection probes 12 and wave speed detection probes 13 above and beside the geological similar body, arranging the acoustic emission detection probes 12 and the wave speed detection probes 13 in pairs, and arranging the acoustic emission detection probes 12 and the wave speed detection probes 13 on the outer wall of the box body and the top surface of the geological similar body; the pressure box, the water pressure gauge, the acoustic emission detection probe and the wave speed detection probe are connected with a monitoring control station;
Step two: injecting water into the water-containing layer, and injecting water into the coal layer 4 according to a mining scheme so as to simulate a mining process; meanwhile, the pressure box 6, the water pressure gauge 7, the acoustic emission detection probe 12 and the wave speed detection probe 13 monitor various parameters in the geological similar body in the coal seam mining process in real time, and a monitoring result is obtained.
Specifically, water is injected into the overburden layer 4 through the second water inlet pipe 9 to form an aquifer above the coal seam 3, water is supplied to the coal seam 3 through the first water inlet pipe 8 according to a designed coal seam exploitation scheme, the coal seam 3 is dissolved when meeting the water, the dissolved liquid is discharged through the first water outlet pipe 10, and the water in the overburden layer 4 is discharged through the second water outlet pipe 11; in the process, the pressure box 6, the water pressure gauge 7, the acoustic emission detection probe 12 and the wave speed detection probe 13 monitor various parameters in the geological similar body in the coal seam mining process in real time, and the monitored parameters are transmitted to the monitoring control station 14 in real time, so that a monitoring result is obtained.
In step one, when the inclined stratum is simulated, the second height of the connection point between the rectangular transverse frame 18 and the first vertical rod 17-1 and the second vertical rod 17-2 is adjusted according to the actual stratum inclination angle, so that the inclination angle of the bottom plate 2 is the same as the actual stratum inclination angle, and then the geological analog is paved. Specifically, the lower ends of the third vertical rod 17-3 and the fourth vertical rod 17-4 are fixedly inserted into the fixed slot 21-1 of the base 21, and the first cross rod 18-1 and the insertion part 18-5 of the third cross rod 18-3 are inserted into the engagement slot 17-5 of the corresponding height positions of the third vertical rod 17-3 and the fourth vertical rod 17-4 according to the actual stratum inclination angle; subsequently, the first vertical rod 17-1 and the second vertical rod 17-2 are fixed in the movable slot 21-2 by using the transverse position adjusting assembly 22; the coaming 1, the bottom plate 2, the rectangular transverse frame 18 and four vertical rods are connected in a sealing mode, and the assembly of the box body with the inclined bottom plate is completed.
In the second step, in the initial stage, the damage to the geological similar body caused by the dynamic water pressure is avoided as much as possible, the water pump is used for slowly injecting water, and the water pump can determine different water injection pressures according to actual conditions. And setting the water injection pressure of the water pump to be 2MPa when the actual stratum bearing water pressure is 2MPa. And (3) maintaining the water head, standing the model for 24 hours, observing regional stress strain and water pressure change conditions of each stratum through a simulation test, monitoring stratum crack evolution conditions in the water drainage process by using the acoustic emission detection probe 12, performing space positioning, and simulating water inflow dynamic characteristics in flow field drilling by using data monitored by the water meter. To maintain the pressure in the water-containing layer, the water pump is started when water is discharged, so that the pressure in the water-containing layer is maintained unchanged. After the test is started, the test process is tracked and monitored in real time. After the stratum is saturated with water, a second drainage switch positioned at the bottom of the physical model box is opened, the water discharge process is simulated, and data such as pressure, acoustic emission, wave speed and the like are acquired by using the pressure box 6, the water pressure gauge 7 and the wave speed detection probe 13.
Compared with the prior art, the three-dimensional mining seepage simulation device for the coal mine engineering provided by the embodiment at least has one of the following beneficial effects:
1. By arranging the acoustic emission detection probes and the wave velocity detection probes on the side and the upper side of the similar geologic body, the three-dimensional space development change condition of formation cracks, physical and mechanical parameters of rock mass and structural characteristic parameter changes in the coal seam mining process can be accurately monitored simultaneously, a complete real-time dynamic monitoring system for mine three-dimensional space development is formed, and the intelligent information acquisition of multiple dimensions is realized by combining a pressure box and a water pressure meter embedded in the geologic similar body, so that the simulation result can reflect the field working condition more truly, and technical support is provided for analyzing phenomena occurring in the mine development process.
2. The height of at least one connecting point of the two sides of the rectangular transverse frame and the vertical rod of the steel frame can be adjusted, the angle between the bottom plate and the horizontal plane can be adjusted, and then inclined stratum can be simulated.
3. The annular sealing body is arranged at the lower part of the box cover plate, and/or the sealing annular bulge is arranged on the top inner wall surface of the coaming, so that the communication between the similar geologic body and the outside atmosphere can be ensured, and the similar geologic body is the same as the actual geologic condition; and can also guarantee sealing performance between similar geologic body and the box bounding wall, can effectively avoid flowing out outside the box along the internal face of bounding wall when flooding to similar geologic body, the test result of simulation is more accurate.
4. The main body of the simulation device is composed of a steel frame and organic glass, has the bearing capacity of a large-weight similar material, realizes three-dimensional visual simulation, can effectively simulate drainage water, seepage flow, mining, rock burst and the like in the mine development process, can monitor three-zone development, earth surface deformation and ground crack change conditions under three-dimensional conditions, can observe the water flow seepage direction in the ground in real time, and can meet the requirements of deep complex engineering environment simulation tests.
5. The coal seam simulation material is a water-soluble material, utilizes the characteristic that the water-soluble material is easily soluble in water to simulate coal seam mining, solves the problems of controllable three-dimensional excavation and seepage coupling, reduces artificial disturbance, and can serve intelligent unmanned mining of a working face.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the application, and is not meant to limit the scope of the application, but to limit the application to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the application are intended to be included within the scope of the application.
Claims (10)
1. The utility model provides a three-dimensional mining seepage flow analogue means of colliery engineering which characterized in that includes:
the box body is provided with a steel frame, and four coamings and a bottom plate are arranged on the steel frame to form an accommodating space;
the geological similar body is provided with a coal bed, an overburden stratum positioned above the coal bed and a underburden stratum positioned below the coal bed, and the coal bed, the overburden stratum and the underburden stratum are arranged in the accommodating space according to a stratum lithology structure of the stratum to be simulated; the coal seam is made of water-soluble materials; a pressure box and a water pressure gauge are arranged in the overlying stratum and the underlying stratum;
a first inlet conduit for supplying water to the coal seam to simulate a coal seam mining process by dissolving the coal seam into a liquid;
the second water inlet pipe is used for injecting water into the overlying stratum so as to construct an aquifer above the coal seam;
a first drain configured to drain the liquid after the coal seam is dissolved;
a second drain configured to drain water from the overburden;
the acoustic emission detection probes are arranged above and beside the geological similar body and are configured to monitor stratum crack evolution conditions in the drainage process and spatially locate cracks;
The wave speed detection probes are arranged above and beside the geological similar body and are configured to monitor rock physical and mechanical parameters and structural characteristic parameter changes of the geological similar body;
and the monitoring control station is electrically connected with the pressure box, the water pressure gauge, the acoustic emission detection probe and the wave speed detection probe, and is used for receiving monitoring data transmitted by the pressure box, the water pressure gauge, the acoustic emission detection probe and the wave speed detection probe in real time, and analyzing based on the monitoring data to obtain a simulation result.
2. The three-dimensional mining-induced seepage simulation device for coal mine engineering according to claim 1, wherein the first drain pipe is provided with a first water inlet and a first water outlet, the first water inlet extends into the accommodating space from the bottom of the box body upwards, and the first water inlet is positioned on the bottom surface of the coal seam; the first water outlet is positioned outside the box body and is provided with a first water discharge switch;
the second drain pipe is provided with a second water inlet and a second water outlet, the second water inlet extends upwards into the accommodating space from the bottom of the box body, and the second water inlet at least extends into an overlying strata above the coal seam; the second water outlet is positioned outside the box body and is provided with a second drainage switch.
3. The three-dimensional mining-induced seepage simulation device for coal mine engineering according to claim 2, wherein the number of the second drainage pipes is three, the three drainage pipes comprise a second drainage pipe a, a second drainage pipe b and a second drainage pipe c, a second water inlet of the second drainage pipe a penetrates out of the top surface of the overlying stratum, and a second water inlet of the second drainage pipe b is higher than a second water inlet of the second drainage pipe c.
4. The three-dimensional mining seepage simulation device for coal mine engineering according to claim 1, further comprising a water supply device, wherein the water supply device comprises a water tank and a water pump, the water pump is connected with the first water inlet pipe and the second water inlet pipe through water supply branch pipelines, a first water inlet switch is arranged on the first water inlet pipe, and a second water inlet switch is arranged on the second water inlet pipe.
5. The three-dimensional mining-induced seepage simulation device for coal mine engineering according to claim 1, wherein the coal beds are arranged in blocks on a plane, two adjacent coal beds are separated by a water-proof piece, the top end of the water-proof piece is embedded in the lower part of the overlying stratum in advance, and the bottom end of the water-proof piece is embedded in the top of the underlying stratum in advance;
Each coal seam is connected with a first water inlet pipe.
6. The three-dimensional mining seepage simulation device for coal mine engineering according to claim 1, wherein the box body is further provided with a cover plate, an opening communicated with the atmosphere is formed in the middle of the cover plate, an annular sealing body is arranged on the lower surface of the cover plate around the opening, and the circumferential side wall surface of the annular sealing body is in sealing contact with the inner wall surface of the coaming; the lower surface of the annular sealing body is in extrusion sealing contact with the top surface of the geological similar body; or the top surface of the geological similar body is higher than the lower surface of the annular sealing body, and at least part of the geological similar body is in sealing contact with the inner side wall surface of the annular sealing body;
and/or the number of the groups of groups,
the top inner wall surface of the coaming is provided with a sealing annular bulge, and the sealing annular bulge is arranged on the inner wall surface of the coaming; when the geological similar is paved, the sealing protrusion is buried in the upper stratum.
7. The three-dimensional mining-induced seepage simulation device for coal mine engineering according to claim 1, wherein the steel frames are provided with steel frame vertical rods and rectangular transverse frames, and the rectangular transverse frames are connected to the lower parts of the four steel frame vertical rods;
The steel frame vertical rods comprise a first vertical rod, a second vertical rod, a third vertical rod and a fourth vertical rod, and the first vertical rod, the second vertical rod, the third vertical rod and the fourth vertical rod are arranged at four corners of the rectangular transverse frame in parallel according to the anticlockwise vertical direction to form four vertical edges of a cuboid;
four bounding walls and a bottom plate are connected with the vertical rod of the steel frame and the rectangular transverse frame in a sealing way to form an accommodating space.
8. The three-dimensional mining-induced seepage simulation device for coal mine engineering according to claim 7, wherein the connection point of the rectangular transverse frame and the third vertical rod and the fourth vertical rod is provided with a first height, and the connection point of the rectangular transverse frame and the first vertical rod and the second vertical rod is provided with a second height;
wherein the first height is a fixed value and the second height is adjustable.
9. The three-dimensional mining-induced seepage simulation device for coal mine engineering according to claim 8, wherein the box body further comprises a base, and the base is provided with a fixed slot and a movable slot;
the lower ends of the third vertical rod and the fourth vertical rod are fixedly inserted into the fixed slot, and the third vertical rod and the fourth vertical rod are positioned on a first plane;
the first vertical rod and the second vertical rod are arranged in the movable slot through a transverse position adjusting assembly, and the first vertical rod and the second vertical rod are positioned on a second plane;
Wherein the lateral position adjustment assembly is configured to adjust a vertical distance between the first plane relative to the second plane.
10. A three-dimensional mining-induced seepage simulation method for a coal mine engineering, which is characterized by comprising the following steps of:
step one: assembling the box body; according to the stratum structure to be simulated, paving a similar geologic body in the box body;
step two: injecting water into the water-containing layer, and injecting water into the coal layer according to a mining scheme to simulate a mining process; meanwhile, the pressure box, the water pressure gauge, the acoustic emission detection probe and the wave velocity detection probe monitor various parameters in the geological similar body in the coal seam mining process in real time, and a monitoring result is obtained.
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| CN104931674A (en) * | 2015-05-22 | 2015-09-23 | 山东科技大学 | Heavy-pitch ultra-thick coalbed fully-mechanized caving mining three-dimensional similar material simulation test bed |
| CN107063970A (en) * | 2017-05-11 | 2017-08-18 | 辽宁工程技术大学 | A kind of test system of three-dimensional simulation release coal and rock Penetration Signature |
| CN107907180A (en) * | 2017-12-18 | 2018-04-13 | 信阳师范学院 | Closed coal mine underground reservoir analog simulation experimental rig and method |
| CN110221036A (en) * | 2018-03-01 | 2019-09-10 | 中国矿业大学 | Water-retaining production " sound emission-infra-red radiation " experimental system with seepage apparatus |
| CN214703615U (en) * | 2021-04-12 | 2021-11-12 | 淮北矿业股份有限公司祁南煤矿 | Experimental device for mining stability of composite water-resisting layer under loose confined aquifer of inclined coal seam |
| CN114152507A (en) * | 2021-11-30 | 2022-03-08 | 国家能源投资集团有限责任公司 | Coal mine underground reservoir monitoring simulation test device |
| CN115343416A (en) * | 2022-06-21 | 2022-11-15 | 中国矿业大学(北京) | Coal seam post-mining flowing water grouting simulation device and test method |
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