Testing device and method for simulating mine tailing slurry consolidation process and retaining wall stress

Abstract

The invention relates to the technical field of mine solid waste filling, in particular to a test device and method for simulating the consolidation process of mine tailing slurry and the stress of a retaining wall. The test device comprises a frame assembly, a constant-temperature maintenance unit, an access unit, a retaining wall simulation unit, an automatic pressure control system and a data acquisition system, the constant-temperature maintenance unit and the automatic pressure control system are both arranged on the frame assembly, and the automatic pressure control system is connected with the constant-temperature maintenance unit; the access unit is communicated with the constant-temperature maintenance unit, and the retaining wall simulation unit is arranged on the access unit; and the data acquisition system is connected with the constant-temperature maintenance unit, the route unit and the automatic pressure control system. By means of the technical scheme, the stress change of the filling slurry and the stress borne by the filling retaining wall in the test process are collected and recorded, theoretical test parameters are provided for design of the mine filling retaining wall, research on the theory of the filling retaining wall and monitoring on the consolidation process of the filling slurry are facilitated, and therefore mine filling is better guided.

Description

Technical Field

[0001] The present application relates to the technical field of mine solid waste filling, and in particular to a test device and method for simulating the consolidation process of mine tailings slurry and the stress of retaining walls. Background Art

[0002] After the underground mine has completed the ore recovery, a certain volume of mining voids will be formed. Due to the lack of support, the mined-out area is at risk of collapse, threatening the ore recovery of adjacent mining areas and bringing hidden dangers to mine safety production. At present, mines usually use the filling method to dispose of the mined-out area, preparing tailings, cement and other materials into filling slurry, and then transporting it into the mined-out area.

[0003] After the filling slurry enters the goaf, it remains in liquid state for a period of time, and then gradually turns into solid state due to cement hydration reaction. The liquid filling slurry is still fluid and will flow from the goaf into the production tunnel. Therefore, a special filling retaining wall is required to block the liquid filling slurry. At this time, the main function of the filling retaining wall is to block and drain water. Therefore, the retaining wall must meet certain strength requirements to effectively resist the force of the filling slurry. Otherwise, the retaining wall may be washed away and the filling slurry may leak into the tunnel. Therefore, experiments are needed to provide theoretical guidance for the design of the filling retaining wall. Due to the many difficulties and data uncertainties in on-site engineering experiments, indoor experiments are urgently needed to study the theory of the filling retaining wall.

[0004] At the same time, the time required for the consolidation of the filling slurry and the quality of the filling body will directly affect the mining time and safety of the adjacent mining areas. Therefore, it is necessary to monitor the consolidation process of the filling slurry to better guide the mining sequence. Summary of the invention

[0005] The purpose of this application is to provide a test device and method for simulating the consolidation process of mine tailings slurry and the stress of retaining walls, which can study the theory of filling retaining walls and monitor the consolidation process of filling slurry, so as to better guide the order of mining.

[0006] In order to achieve the above-mentioned object, in a first aspect, the present invention provides a test device for simulating the consolidation process of mine tailings slurry and the stress of retaining wall, including a frame assembly, a constant temperature maintenance unit, a retaining wall simulation unit, an access unit, an automatic pressure control system and a data acquisition system;

[0007] The constant temperature curing unit and the automatic pressure control system are both arranged on the frame assembly, the constant temperature curing unit is used to place slurry, and the automatic pressure control system is connected to the constant temperature curing unit to control the loading pressure of the constant temperature curing unit;

[0008] The access unit is connected to the constant temperature maintenance unit, and the retaining wall simulation unit is arranged in the access unit;

[0009] The data acquisition system is connected to the constant temperature maintenance unit, the route unit and the automatic pressure control system, and is used to collect data from the constant temperature maintenance unit, the route unit and the automatic pressure control system.

[0010] In an optional embodiment, the constant temperature curing unit includes a curing container, a constant temperature controller, a temperature sensor and a first fixing member;

[0011] The maintenance container is arranged on the frame assembly through the first fixing member;

[0012] The curing container comprises a curing layer, a heating layer and a heat preservation layer arranged in sequence from the inside to the outside;

[0013] The temperature sensor is arranged on the curing container and is used to measure the temperature in the curing container;

[0014] The constant temperature controller is connected to the temperature sensor and the heating layer signal.

[0015] In an optional embodiment, the automatic pressure control system includes a press, a pressure sensor, a pressurizing piston and a telescopic bracket;

[0016] The press is arranged below the frame assembly;

[0017] The telescopic bracket is arranged above the frame assembly, and the telescopic bracket is connected to the pressurizing piston, and can drive the pressurizing piston to move linearly in the constant temperature curing unit;

[0018] The pressure sensor is used to monitor the pressure inside the constant temperature curing unit, and the pressure sensor is connected to the data acquisition system and the press signal;

[0019] After receiving the pressure data from the pressure sensor and the data acquisition system, the press can autonomously adjust the loading pressure in the constant temperature curing unit.

[0020] In an optional embodiment, the retaining wall simulation unit is a plane partition or an arc partition, and a surface of the plane partition has holes of a set size.

[0021] In an optional embodiment, the inlet unit includes an inlet pipe, a first connecting flange and a second connecting flange;

[0022] The first connecting flange and the second connecting flange are respectively arranged at opposite ends of the inlet pipe;

[0023] The inlet pipe includes a left half pipe and a right half pipe;

[0024] After the left half pipe and the right half pipe are spliced ​​into a complete pipeline, they are fixed by a clamp;

[0025] A slot and a scale are provided in the inlet pipe, the slot is used to install the retaining wall simulation unit, and the scale is used to adjust the installation position of the retaining wall simulation unit;

[0026] The inner wall of the inlet pipe is provided with threads, and the threads are used to increase the friction between the slurry and the inner wall.

[0027] In an optional embodiment, the inlet unit has a water outlet pipeline at one end away from the constant temperature maintenance unit, and an electromagnetic flowmeter is provided on the water outlet pipeline.

[0028] In an optional embodiment, the frame assembly includes a base, a second fixing member, and a plurality of supporting columns;

[0029] One end of the support column is fixedly connected to the base, and the other end is fixedly connected to the second fixing member;

[0030] The constant temperature maintenance unit is arranged on the base and some components of the automatic pressure control system are connected to the second fixing member.

[0031] In an optional embodiment, a recessed groove and a threading hole are provided on the base, the recessed groove is used for installing the constant temperature maintenance unit, and the threading hole can pass a data line of a sensor inside the constant temperature maintenance unit.

[0032] In an optional embodiment, a main controller is further included, and the main controller is signal-connected to the automatic pressure control system and the data acquisition system.

[0033] In a second aspect, the present invention also provides a test method for a test device simulating the consolidation process of mine tailings slurry and the stress of a retaining wall, comprising the following steps:

[0034] Filling slurry is placed in the constant temperature curing unit, and the retaining wall simulation unit arranged in the access unit is impacted. The pressure applied to the filling slurry is adjusted by the automatic pressure control system, and the data acquisition system is used to collect and record the force changes of the filling slurry and the force on the filling retaining wall during the test.

[0035] Through the above technical scheme, the force changes of the filling slurry and the force exerted on the filling retaining wall during the test are obtained, which provides theoretical test parameters for the design of mine filling retaining walls, is conducive to the theoretical study of filling retaining walls and the monitoring of the consolidation process of the filling slurry, so as to better guide mine filling.

[0036] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 A front view of a test device for simulating the consolidation process of mine tailings slurry and the stress of a retaining wall provided in an embodiment of the present invention;

[0039] Figure 2 A schematic diagram of the three-dimensional structure of a test device for simulating the consolidation process of mine tailings slurry and the stress of a retaining wall provided in an embodiment of the present invention;

[0040] Figure 3 A front view of a frame assembly of a test device for simulating the consolidation process of mine tailings slurry and the stress of a retaining wall provided in an embodiment of the present invention;

[0041] Figure 4 A schematic diagram of the three-dimensional structure of a frame assembly of a test device for simulating the consolidation process of mine tailings slurry and the stress of a retaining wall provided in an embodiment of the present invention;

[0042] Figure 5 A schematic diagram of the three-dimensional structure of the chassis of a test device for simulating the consolidation process of mine tailings slurry and the stress of a retaining wall provided in an embodiment of the present invention;

[0043] Figure 6 A front view of a telescopic support of a test device for simulating the consolidation process of mine tailings slurry and the stress of a retaining wall provided by an embodiment of the present invention;

[0044] Figure 7 A schematic diagram of the three-dimensional structure of a telescopic bracket of a test device for simulating the consolidation process of mine tailings slurry and the stress of a retaining wall provided in an embodiment of the present invention;

[0045] Figure 8 A front view of an inlet unit of a test device for simulating the consolidation process of mine tailings slurry and the stress of a retaining wall provided in an embodiment of the present invention;

[0046] Fig. 9 for Figure 8 AA section view;

[0047] Fig.10 for Figure 8 BB cross-sectional view.

[0048] icon:

[0049] 1-press; 2-inlet unit; 3-constant temperature maintenance unit; 4-frame assembly; 5-telescopic bracket; 6-constant temperature controller; 7-data acquisition system; 8-computer; 9-support column; 10-base; 11-first fixing piece; 12-second fixing piece; 13-fixing nut; 14-connector; 15-sensor seal; 16-recessed groove; 17-threading hole; 18-column through hole; 19-sensor connector; 20-pressure sensor; 21-sensor heightening pad; 22-pressurizing piston; 23-exhaust valve; 24-inlet pipe; 25-first connecting flange; 26-second connecting flange; 27-clamp; 28-electromagnetic flowmeter; 29-thread; 30-retaining wall simulation unit; 31-left half pipe; 32-right half pipe; 33-sealing pad. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0051] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0052] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] The present invention provides a test device and method for simulating the consolidation process of mine tailings slurry and the stress of retaining wall. Figure 1 and Figure 2As shown, it includes a frame assembly 4, a constant temperature curing unit 3, a retaining wall simulation unit, an approach unit 2, an automatic pressure control system and a data acquisition system 7; the constant temperature curing unit 3 and the automatic pressure control system are both arranged on the frame assembly 4, the constant temperature curing unit 3 is used to place slurry, and the automatic pressure control system is connected to the constant temperature curing unit 3, and is used to control the loading pressure of the constant temperature curing unit; the approach unit 2 is connected to the constant temperature curing unit 3, and the retaining wall simulation unit 30 is arranged in the approach unit 2; the data acquisition system 7 is connected to the constant temperature curing unit 3, the approach unit 2 and the automatic pressure control system, and is used to collect data from the constant temperature curing unit 3, the approach unit 2 and the automatic pressure control system.

[0054] In this embodiment, the constant temperature maintenance unit 3 is arranged on the frame assembly 4, and has a first accommodating space inside, and the first accommodating space is used to place slurry; the route unit 2 is connected to the constant temperature maintenance unit 3, and the route unit 2 has a second accommodating space, and the second accommodating space is connected to the first accommodating space; the retaining wall simulation unit 30 is arranged in the second accommodating space of the route unit 2, and its position can be freely adjusted in the route unit 2; the automatic pressure control system is arranged on the frame assembly 4, and can adjust the loading pressure of the constant temperature maintenance unit 3; the data acquisition system 7 is arranged outside the simulation test device, which is used to collect data from all sensors during the test, and record the force changes of the filling slurry and the force exerted on the filling retaining wall during the test, so as to provide theoretical test parameters for the design of mine filling retaining walls.

[0055] In an optional embodiment, the constant temperature curing unit 3 includes a curing container, a constant temperature controller 6, a temperature sensor and a first fixing member 11; the curing container is arranged on the frame assembly 4 through the first fixing member 11; the curing container includes a curing layer, a heating layer and an insulation layer arranged in sequence from the inside to the outside; the temperature sensor is arranged on the curing container for measuring the temperature inside the curing container; the constant temperature controller 6 is connected to the temperature sensor and the heating layer signal.

[0056] In this embodiment, the constant temperature curing unit 3 is a cylindrical curing container, and the space inside it is the first accommodation space. In this embodiment, the curing container is a multi-layer structure, which is a curing layer, a heating layer and a heat preservation layer from the inside to the outside. The curing container is connected to a temperature sensor and a constant temperature controller 6, and is fixed to the frame assembly 4 through a first fixing member 11.

[0057] Specifically, in this embodiment, the curing layer is arranged at the innermost side of the curing container, followed by the heating layer, and the outermost layer is the insulation layer. The three are tightly combined and cannot be disassembled; the temperature sensor is fixed on the curing container; the heating layer and the temperature sensor are both connected to the constant temperature controller 6, and the constant temperature controller 6 is further connected to the controller (i.e., computer 8), and the temperature of the curing container can be adjusted by the constant temperature controller 6 or the computer 8; the first fixing member 11 is fixed on the outer wall of the curing container and is fixedly connected to the frame assembly 4 to realize the fixation of the curing container.

[0058] It should be pointed out that the curing layer, the heating layer and the heat-insulating layer can be installed in a non-detachable manner or in a detachable manner, as long as the constant temperature function of the curing container can be achieved.

[0059] In some embodiments, the data line of the sensor installed in the curing container is installed through a hole in the side wall of the curing container.

[0060] In an optional embodiment, the automatic pressure control system includes a press 1, a pressure sensor 20, a pressurizing piston 22 and a telescopic bracket 5; the press 1 is arranged below the frame assembly 4; the telescopic bracket 5 is arranged above the frame assembly 4, and the telescopic bracket 5 is connected to the pressurizing piston 22, and can drive the pressurizing piston 22 to move linearly in the constant temperature maintenance unit 3; the pressure sensor 20 is used to monitor the pressure inside the constant temperature maintenance unit 3, and the pressure sensor 20 is connected to the data acquisition system 7 and the press 1 signal; after receiving the pressure data from the pressure sensor 20 and the data acquisition system 7, the press 1 can autonomously adjust the loading pressure in the constant temperature maintenance unit.

[0061] In this embodiment, the automatic pressure control system includes a press 1, a pressure sensor 20, a telescopic bracket 5, a pressurizing piston 22 and automatic pressure control software. The press 1 is arranged below the base 10 of the frame assembly 4, and the pressurizing piston 22 is arranged above the frame assembly 4. The pressurizing piston 22 can make reciprocating linear movements in the constant temperature curing container. The end of the pressure sensor 20 close to the curing container is connected to the pressurizing piston 22, and the end of the pressure sensor 20 away from the curing container is connected to the telescopic bracket 5. The pressure sensor 20 is connected to the data acquisition system 7, and the press 1 and the data acquisition system 7 are connected to the computer 8. The automatic pressure control software adjusts the pressure of the press 1 by collecting data from the pressure sensor 20, and the automatic pressure control software can automatically control the pressure of the press 1 according to the set program.

[0062] Specifically, in this embodiment, the press machine 1 is arranged below the base 10 of the frame assembly 4, the press machine 1 and the frame assembly 4 are detachably connected, the telescopic bracket 5 is fixed above the curing container by the second fixing member 12, and the sensor connecting member 19, the pressure sensor 20, the sensor heightening pad 21 and the pressurizing piston 22 are connected in sequence below the telescopic bracket 5 by bolts, and the pressurizing piston 22 can make reciprocating linear movements in the curing container, such as Figure 6 and Figure 7 shown.

[0063] Specifically, in this embodiment, a sealing groove is provided on the edge of the pressurizing piston 22, and the sealing groove is used to place the first sealing ring, so that the pressurizing piston 22 can fit tightly with the curing container. At the same time, an exhaust valve 23 is provided on the pressurizing piston 22 to exhaust the air between the pressurizing piston 22 and the filling slurry after the pressurizing piston 22 enters the curing container and has not yet contacted the filling slurry.

[0064] Specifically, in the present embodiment, the sensor heightening pad 21 is to prevent water from flowing out of the exhaust valve 23 when the slurry is bonded or water from leaking from the pressurizing piston 22, thereby damaging the sensor.

[0065] In an optional embodiment, the telescopic support 5 is an air pump or a hydraulic pump.

[0066] In this embodiment, the telescopic bracket 5 is telescopically extended by using an air pump or a hydraulic pump as a power and telescopic device to achieve the function of the telescopic bracket 5 .

[0067] It can be understood that in the present embodiment, the telescopic bracket 5 is an air pump or a hydraulic pump, but it is not limited to air pumps or hydraulic pumps. It can also be other telescopic structures, such as a scissor-type telescopic structure, a threaded screw linear drive mechanism and other structures in combination with a power structure. In other words, as long as it can drive the piston to move back and forth in a straight line in the curing container, it will be fine.

[0068] In a preferred embodiment, the retaining wall simulation unit is a plane partition or an arc partition, and a hole of a set size is provided on its surface.

[0069] Specifically, in this embodiment, the retaining wall simulation unit can select a flat partition or a curved partition according to the requirements of the actual mine filling environment. The flat partition is suitable for simulating a vertical mine filling retaining wall, while the curved partition is used to simulate a retaining wall structure with a curvature in the mine to adapt to different filling spaces and geological conditions.

[0070] More specifically, in this embodiment, the surface of the retaining wall simulation unit is provided with holes of set sizes, and the diameter and spacing of these holes can be adjusted according to the test requirements. The size and distribution of the holes directly affect the drainage performance and stress conditions of the mine filling retaining wall. For example, smaller holes can simulate a mine filling retaining wall with low drainage, while larger holes are used to simulate a mine filling retaining wall with high drainage.

[0071] The spacing of the holes can be adjusted according to the actual design requirements of the mine filling retaining wall to study the influence of different drainage densities on the stress of the mine filling retaining wall.

[0072] In an optional embodiment, if Figure 8 , Fig. 9 and Fig.10 As shown, the inlet unit 2 includes an inlet pipe 24, a first connecting flange 25 and a second connecting flange 26; the first connecting flange 25 and the second connecting flange 26 are respectively arranged at the opposite ends of the inlet pipe 24; a card slot and a scale are arranged in the inlet pipe 24, the card slot is used to install the retaining wall simulation unit 30, and the scale is used to adjust the installation position of the retaining wall simulation unit 30.

[0073] In this embodiment, the inlet pipe 24 of the inlet unit 2 is connected to the interior of the curing container. The filling slurry in the curing container can enter the inlet pipe 24 under the action of the pressurizing piston 22, and impact the retaining wall simulation unit 30 in the inlet pipe 24, thereby realizing data research on the theory of mine filling retaining wall and monitoring the consolidation process of the filling slurry.

[0074] Specifically, in this embodiment, the first connecting flange 25 is used to connect the inlet pipe to the curing container, and the second connecting flange 26 is used to connect other components on the other end of the inlet pipe 24 .

[0075] More specifically, in this embodiment, the inlet pipe 24 has a slot inside, and the retaining wall simulation unit 30 is mounted inside the inlet pipe through the slot.

[0076] More specifically, in this embodiment, there are multiple card slots, and the multiple card slots are set at different distances between the inlet pipe 24 and the maintenance container, which can test the stress conditions of the retaining wall simulation units 30 at different positions, or test the stress conditions of different retaining wall simulation units 30.

[0077] More specifically, in this embodiment, the scale is located near the card slot to indicate the relative position of the card slot. The card slot is a structure for installing the retaining wall simulation unit 30, and the scale provides an accurate quantitative reference for the installation position of the retaining wall simulation unit 30. The tester can install the retaining wall simulation unit 30 at a predetermined position according to the scale mark, thereby realizing accurate control of the position of the retaining wall simulation unit 30.

[0078] In an optional embodiment, the inlet pipe 24 includes a left half pipe 31 and a right half pipe 32 ; after the left half pipe 31 and the right half pipe 32 are spliced ​​into a complete pipeline, they are fixed by a clamp 27 .

[0079] In this embodiment, the inlet pipe 24 is a completed pipeline composed of a left half pipe 31 and a right half pipe 32 which are spliced ​​together and fixed by a clamp 27 .

[0080] Sealing pads 33 are provided at both ends of the inlet pipe 24 and between the left half pipe 31 and the right half pipe 32 to achieve sealing of the inlet pipe 24 and prevent leakage of the filling slurry.

[0081] In some embodiments, the inlet unit 2, the curing container and the electromagnetic flowmeter 28 can be connected by applying structural adhesive.

[0082] Specifically, in this embodiment, the inner walls of the left half tube 31 and the right half tube 32 are both provided with a slot and a thread 29 , and the side walls are provided with a threading hole 17 for passing the connecting wire of the sensor.

[0083] The threading hole 17 is provided with a seal to ensure the sealing of the inside of the inlet pipe 24 .

[0084] In some embodiments, the inlet pipe 24 can be divided into three parts for splicing and installation, and the connection between them can also be bolted.

[0085] In this embodiment, threads 29 are provided on the inner walls of the left half pipe 31 and the right half pipe 32, and the friction of the mine access can be simulated through the threads 29. When the device is disassembled after the test, the filling slurry has solidified, and the connector 14 of the device needs to be disassembled first, and then the filling body in the curing container is squeezed out through the telescopic bracket 5, and then the sensor in the filling body is further disassembled. For the filling body inside the access pipe 24, it is only necessary to disassemble and separate the left half pipe 31 and the right half pipe 32 of the access pipe 24.

[0086] In the above embodiments, the retaining wall simulation unit can also be processed into a non-draining retaining wall or a retaining wall with drainage to varying degrees.

[0087] In some embodiments, the friction of the access pipe 24 can be simulated by pasting materials such as sandpaper on the inner wall to simulate the friction of the mine access.

[0088] In some embodiments, the retaining wall simulation unit is arranged in an arc shape.

[0089] In an optional embodiment, the inlet unit 2 has a water outlet pipeline at one end away from the constant temperature maintenance unit 3, and an electromagnetic flowmeter 28 is provided on the water outlet pipeline.

[0090] In this embodiment, the drainage condition of the retaining wall simulation unit 30 is measured by an electromagnetic flowmeter 28 .

[0091] Specifically, in this embodiment, one end of the electromagnetic flowmeter 28 is used to connect to the inlet unit 2, and the other end is used to connect to the water outlet pipe.

[0092] It can be understood that in this embodiment, the drainage of the retaining wall simulation unit 30 is measured by the electromagnetic flowmeter 28, but it is not limited to this method. It can also be other devices that can measure the drainage of the retaining wall simulation unit 30.

[0093] In an optional embodiment, if Figure 3 and Figure 4 As shown, the frame assembly 4 includes a base 10, a second fixing member 12 and a plurality of supporting columns 9; one end of the supporting column 9 is fixedly connected to the base 10, and the other end is fixedly connected to the second fixing member 12; the constant temperature maintenance unit 3 is arranged on the base 10, and some components of the automatic pressure control system are connected to the second fixing member 12.

[0094] In this embodiment, the frame assembly 4 includes a base 10, a second fixing member 12 and a plurality of supporting columns 9. Figure 5 As shown, the base 10 is provided with a recessed groove 16, a threading hole 17, a column through hole 18 and a sensor seal 15. The recessed groove 16 is arranged in the direction of the curing container, and the lower end of the curing container is arranged in the recessed groove 16. A first sealing ring is arranged in the recessed groove 16, and the first sealing ring is used for sealing the connection between the recessed groove 16 and the curing container. The recessed groove 16, the first sealing ring and the curing container are all detachably connected; the threading hole 17 penetrates the base 10 and is connected to the seal of the wire, which can facilitate the sensor to lead out, and the threading hole 17 and the seal are detachably connected. When necessary, the gap can be filled with structural adhesive to prevent water leakage during the test; the column through hole 18 is used to pass through the supporting column 9; the press connection end is located directly below the base 10, and is used to connect the press 1, and the press connection end is detachably connected to the press 1.

[0095] In some embodiments, the number of threading holes 17 may be determined according to the number of sensors arranged in the experiment.

[0096] Specifically, in this embodiment, the support column 9 includes a column and a connecting head 14. The column is used to connect the base 10, the first fixing member 11 and the second fixing member 12 on the curing container. The connecting head 14 is used to connect the column after passing through the base 10. The connecting head 14 can be embedded under the base 10. The support column 9 and the first fixing member 11, and the support column 9 and the second fixing member are fixedly connected by fixing nuts 13.

[0097] Specifically, in this embodiment, the second fixing member 12 is used to support the telescopic bracket 5, and the wire sealing member is used to seal the wires passing through the test device.

[0098] In this embodiment, the purpose of the telescopic bracket 5 is to firstly bring the pressurizing piston 22 into close contact with the slurry through the telescopic bracket 5 before the press 1 applies pressure, and then apply pressure to the filling slurry through the press 1.

[0099] In the above embodiment, the columns, the base 10, the first fixing member 11, and the second fixing member 12 are connected by bolts. The first fixing member 11 is fixed to the curing container, and the two are inseparable. The curing container is connected to the base 10 through the first fixing member 11. In order to increase the sealing performance, a first sealing ring is provided between the curing container and the recessed groove 16 on the base 10.

[0100] In some embodiments, the maintenance container and the base 10 may be fixed by other means, and the sealing between the two may also be achieved by applying structural adhesive.

[0101] In an optional embodiment, a main controller is further included, and the main controller is connected to the automatic pressure control system and the data acquisition system 7 by signals.

[0102] In this embodiment, the main controller is a computer 8, and the computer 8 is used to perform overall background control to achieve complete experimental simulation and data collection.

[0103] The signal connection method can be a wired connection or a wireless connection.

[0104] It can be seen from the above that in the test device for simulating the consolidation process of mine tailings slurry and the stress of retaining wall provided by the present invention, the base 10 of the frame assembly 4 is arranged on the lifting platform of the press 1, and the curing container is arranged in the recessed groove 16 of the base 10, and a first sealing ring is arranged in the recessed groove 16 of the base 10. The pressure sensor 20, the pore water pressure sensor, the matrix suction sensor and other sensors are respectively arranged at the center of the base 10, the edge of the base 10 and the side of the curing container; the curing container is used to place the filling slurry, and the curing temperature of the curing container is regulated by the thermostat 6; one end of the inlet unit 2 is connected to the curing container, and the two are interconnected, and the other end is connected to the electromagnetic flowmeter 28, the retaining wall simulation unit 30 is located on the card slot inside the inlet pipe 24, and the pressure sensor 20 and the pore water pressure sensor are arranged on the retaining wall simulation unit 30; the telescopic bracket 5 is arranged above the frame assembly 4, and the pressure sensor 20 of the automatic pressure control system is connected to the pressurizing piston 22 is arranged on the telescopic bracket 5 and can make reciprocating linear movement in the curing container. The exhaust valve 23 is arranged on the pressurizing piston 22 to exhaust the air in the curing container. The pressure sensor 20 is connected to the data acquisition system 7 by signal. The data acquisition system 7 and the press machine 1 are both connected to the computer 8 by signal. The press machine 1 applies pressure to the pressurizing piston 22 through the telescopic bracket 5, and transmits the pressure value to the data acquisition system 7 through the pressure sensor 20. The data acquisition system 7 feeds back to the computer 8. The computer 8 adjusts the applied pressure according to the corresponding program, and finally realizes automatic pressure control. The data acquisition unit is used to record and display the test data of all sensors.

[0105] It can be seen from the above that the test device for simulating the consolidation process of mine tailings slurry and the stress of retaining wall provided by the present invention can simulate the entire process of filling the mine goaf. First, the pressure applied to the filling slurry is adjusted by the press 1 to simulate the pressure applied to the bottom of the mining area and the mine filling retaining wall by the filling slurry every day during the actual filling process. Secondly, the temperature inside the curing container is adjusted by the constant temperature controller 6 to simulate the filling temperature of the mine. Finally, different types of mine filling retaining walls are set at different positions of the access unit 2 to simulate the actual filling retaining walls of the mine.

[0106] To sum up, the device of the present invention can truly simulate the mine filling environment. It can not only monitor the consolidation change process of the slurry during the filling process, thereby evaluating the quality of the filling body, but also provide guidance on the mining and filling sequence. Secondly, it can also monitor the force of mine filling retaining walls of different positions and types, and then provide a theoretical basis for the installation position and design of mine filling retaining walls, further improve the safety and economy of mine filling, and has very strong applicability.

[0107] Through the above technical scheme, the filling slurry is placed in the constant temperature curing unit 3, the retaining wall simulation unit 30 arranged in the access unit 2 is impacted, the pressure applied to the filling slurry is adjusted by the automatic pressure control system, and then the data acquisition system 7 is used to collect and record the force changes of the filling slurry and the force exerted on the mine filling retaining wall during the test, so as to provide theoretical test parameters for the design of mine filling retaining walls, which is conducive to the theoretical study of mine filling retaining walls and the monitoring of the consolidation process of the filling slurry, so as to better guide the order of mining and filling.

[0108] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

[0109] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A test device for simulating the consolidation process of mine tailings slurry and the stress of retaining wall, characterized in that: It includes frame components, constant temperature maintenance unit, retaining wall simulation unit, access unit, automatic pressure control system and data acquisition system; The constant temperature curing unit and the automatic pressure control system are both arranged on the frame assembly, the constant temperature curing unit is used to place slurry, and the automatic pressure control system is connected to the constant temperature curing unit to control the loading pressure of the constant temperature curing unit; The access unit is connected to the constant temperature maintenance unit, and the retaining wall simulation unit is arranged in the access unit; The data acquisition system is connected to the constant temperature maintenance unit, the route unit and the automatic pressure control system, and is used to collect data from the constant temperature maintenance unit, the route unit and the automatic pressure control system.

2. The test device for simulating the consolidation process of mine tailings slurry and the stress of retaining wall according to claim 1, characterized in that: The constant temperature curing unit includes a curing container, a constant temperature controller, a temperature sensor and a first fixing member; The maintenance container is arranged on the frame assembly through the first fixing member; The curing container comprises a curing layer, a heating layer and a heat preservation layer arranged in sequence from the inside to the outside; The temperature sensor is arranged on the curing container and is used to measure the temperature in the curing container; The constant temperature controller is connected to the temperature sensor and the heating layer signal.

3. The test device for simulating the consolidation process of mine tailings slurry and the stress of retaining wall according to claim 1, characterized in that: The automatic pressure control system includes a press, a pressure sensor, a pressurizing piston and a telescopic bracket; The press is arranged below the frame assembly; The telescopic bracket is arranged above the frame assembly, and the telescopic bracket is connected to the pressurizing piston, and can drive the pressurizing piston to move linearly in the constant temperature curing unit; The pressure sensor is used to monitor the pressure inside the constant temperature curing unit, and the pressure sensor is connected to the data acquisition system and the press signal; After receiving the pressure data from the pressure sensor and the data acquisition system, the press can autonomously adjust the loading pressure in the constant temperature curing unit.

4. The test device for simulating the consolidation process of mine tailings slurry and the stress of retaining wall according to claim 1, characterized in that: The retaining wall simulation unit is a plane partition or an arc partition, and a hole of a set size is provided on its surface.

5. The test device for simulating the consolidation process of mine tailings slurry and the stress of retaining wall according to claim 1, characterized in that: The inlet unit includes an inlet pipe, a first connecting flange, and a second connecting flange; The first connecting flange and the second connecting flange are respectively arranged at opposite ends of the inlet pipe; The inlet pipe includes a left half pipe and a right half pipe, and the left half pipe and the right half pipe are spliced ​​into a complete pipe and fixed by a clamp; A slot and a scale are provided in the inlet pipe, the slot is used to install the retaining wall simulation unit, and the scale is used to adjust the installation position of the retaining wall simulation unit; The inner wall of the inlet pipe is provided with threads, and the threads are used to increase the friction between the slurry and the inner wall.

6. The test device for simulating the consolidation process of mine tailings slurry and the stress of retaining wall according to claim 1, characterized in that: The inlet unit has a water outlet pipeline at one end away from the constant temperature maintenance unit, and an electromagnetic flowmeter is arranged on the water outlet pipeline.

7. The test device for simulating the consolidation process of mine tailings slurry and the stress of retaining wall according to claim 1, characterized in that: The frame assembly includes a base, a second fixing member and a plurality of supporting columns; One end of the support column is fixedly connected to the base, and the other end is fixedly connected to the second fixing member; The constant temperature maintenance unit is arranged on the base and some components of the automatic pressure control system are connected to the second fixing member.

8. The test device for simulating the consolidation process of mine tailings slurry and the stress of retaining wall according to claim 7, characterized in that: The base is provided with a recessed groove and a threading hole, wherein the recessed groove is used for installing the constant temperature curing unit, and the threading hole is used for passing a data line of a sensor inside the constant temperature curing unit.

9. The test device for simulating the consolidation process of mine tailings slurry and the stress of retaining wall according to claim 1, characterized in that: It also includes a main controller, which is connected to the automatic pressure control system and the data acquisition system by signals.

10. A test method for simulating the consolidation process of mine tailings slurry and the stress of retaining wall, characterized in that: The test device for simulating the consolidation process of mine tailings slurry and the stress of retaining wall as claimed in any one of claims 1 to 9 is used to conduct the test, comprising the following steps: Filling slurry is placed in the constant temperature curing unit, and the retaining wall simulation unit arranged in the access unit is impacted. The pressure applied to the filling slurry is adjusted by the automatic pressure control system, and the data acquisition system is used to collect and record the force changes of the filling slurry and the force on the filling retaining wall during the test.

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