CN114061814B

CN114061814B - Real-time dynamic monitoring test device for water conditions of roof of coal mine mining working face

Info

Publication number: CN114061814B
Application number: CN202111385198.6A
Authority: CN
Inventors: 桑亚群; 李占利; 秋兴国; 牟琦; 张昭昭
Original assignee: Xian University of Science and Technology
Current assignee: Xian University of Science and Technology
Priority date: 2021-11-22
Filing date: 2021-11-22
Publication date: 2023-06-20
Anticipated expiration: 2041-11-22
Also published as: CN114061814A

Abstract

The invention discloses a real-time dynamic monitoring test device for the water condition of a roof of a coal mine mining working face, which comprises a frame body and a base, wherein a first motor is fixed on the inner wall of the base, a driving end of the first motor is fixedly connected with the outer wall of the frame body, a clamping mechanism is arranged between the frame body and the base, a bottom plate is fixed in the frame body, a rock mass is fixed on the upper side wall of the bottom plate, a stress contact positioned on the lower side of the rock mass is fixedly embedded on the upper side wall of the bottom plate, a second motor is fixed on the inner wall of the frame body, and a two-way screw rod is horizontally arranged and fixed on the driving end of the second motor. The advantages are that: according to the invention, the rock mass and the bottom plate which are made of the same materials of the coal mine and the water tank are contacted with the bottom plate, so that the material loss of the rock mass and the bottom plate in the drilling process under different water body thicknesses is simulated, and the stress contact is used for monitoring the stress, so that the loss ratio and the stress change of the rock mass under different water body thicknesses are monitored.

Description

Real-time dynamic monitoring test device for water conditions of roof of coal mine mining working face

Technical Field

The invention relates to the technical field of coal mine mining monitoring tests, in particular to a device for dynamically monitoring the water condition of a roof of a coal mine mining working face in real time.

Background

At present, as coal seam mining is deepened continuously, geological structures and hydrogeology are increasingly complex, the damage depth of mine pressure and mining stress to a bottom plate is increased continuously, and the mining water bursting problem of a thin water-resisting layer and a high-bearing water-bearing layer encountered during coal mining is becoming a main threat of mine water damage.

At present, the research on the water conditions of the top plate and the bottom plate mainly comprises a field detection method and an indoor simulation method, but the influence on the top plate under different water conditions of the bottom plate can not be actually and dynamically monitored, so that the significance of the actual dynamic monitoring is lost.

In order to solve the problems, a device for dynamically monitoring the water condition of a roof of a mining working face of a coal mine in real time is provided.

Disclosure of Invention

The invention aims to solve the problems in the background technology, and provides a real-time dynamic monitoring test device for the water conditions of a roof of a mining working face of a coal mine.

In order to achieve the above purpose, the present invention adopts the following technical scheme: the utility model provides a real-time dynamic monitoring test device of colliery mining face roof water regime, includes framework and base, the inner wall of base is fixed with motor one, the drive end of motor one and the outer wall fixed connection of framework, be equipped with screens mechanism between framework and the base, be fixed with the bottom plate in the framework, the upper side wall of bottom plate is fixed with the rock mass, the upper side wall of bottom plate is still fixed to inlay and is established with the stress contact that is located the rock mass downside, be fixed with motor two on the inner wall of framework, motor two's drive end level sets up and is fixed with two-way lead screw, the equal cooperation cover of both ends outer wall of two-way lead screw is equipped with the slider, two the upper side wall of slider is all rotated and is connected with the bracing piece, the lower side wall slip of bottom plate is inserted and is equipped with the basin, two the upper end of bracing piece is rotated with the lower side wall of basin and is connected, the right side wall of basin is connected with the extension groove, the tip slip of extension groove is provided with the piston rod, the outer wall of basin is fixed with the gusset, the tip of gusset is installed to the tip, be located the right side the upper side wall of slider is fixed with the gear, and is located right side wall fixed with the spur gear and is equipped with the spur gear and is meshed with the spur gear.

In the real-time dynamic monitoring test device for the water conditions of the top plate of the working face of the coal mine, the clamping mechanism comprises a vertical plate fixed on the inner bottom wall of the base, a connecting plate is fixed at the upper end of the vertical plate, a clamping plate is inserted on the connecting plate in a sliding mode, a bayonet matched with the clamping plate is arranged on the outer wall of the frame body, a magnet plate is fixedly sleeved on the outer wall of the clamping plate, an electromagnet is fixedly embedded on the connecting plate, and a compression spring is fixedly connected between one end of the clamping plate far away from the bayonet and the inner wall of the base.

In the real-time dynamic monitoring test device for the water conditions of the roof of the mining working face of the coal mine, the telescopic rod is fixed on the inner wall of the frame body, the motor is fixed on the driving end of the telescopic rod, and the drill bit arranged towards the rock body is fixed on the driving end of the motor.

In the real-time dynamic monitoring test device for the water condition of the top plate of the coal mine mining working face, a drying groove positioned on one side of the bottom plate is fixed in the frame body, a weighing sensor is fixedly embedded in the lower side wall of the drying groove, and a plurality of heating pipes are fixed in the drying groove.

In the real-time dynamic monitoring test device for the water condition of the roof of the coal mine mining working face, the limiting plate is fixed in the frame body, the cross rod is inserted in the limiting plate in a sliding mode, the end portion of the cross rod is fixedly connected with the outer wall of the drying groove, the motor III is fixed on the inner wall of the frame body, the rotary table is fixed on the driving end of the motor III, the connecting rod is connected to the outer wall of the rotary table in a rotary mode, and the other end of the connecting rod is connected to the end portion of the cross rod in a rotary mode.

In the device for dynamically monitoring the water condition of the roof of the mining working face of the coal mine in real time, the connecting position of the connecting rod and the turntable is deviated from the circle center of the turntable.

In the real-time dynamic monitoring test device for the water condition of the roof of the coal mine mining working face, the outer wall of the water tank is fixedly provided with the filtering tank, the filtering tank is internally provided with the screen, the return pipe is connected between the filtering tank and the extension tank, the water pump connected with the return pipe is arranged in the filtering tank, and the one-way valve is arranged at the joint of the return pipe and the extension tank.

Compared with the prior art, the device for dynamically monitoring the water condition of the roof of the mining working face of the coal mine in real time has the advantages that:

1. the second motor drives the two-way screw rod to rotate, the sliding block moves towards the inner side or the outer side at the same time in the two-way screw rod, the supporting rod is supported or leveled, the height of the water tank is increased or decreased, when the height of the water tank is increased, the bottom plate extrudes water in the water tank to flow back into the extension tank, the thickness of water in the water tank is decreased, when the height of the water tank is decreased, the thickness of water in the water tank is increased, and the conditions of the bottom plate and the rock body under the condition of different water body thicknesses are simulated;

2. the drill bit is contacted with the rock mass to perform drilling, stress variation is monitored in real time through the stress contact, the drilled rock mass fragments fall into the drying groove, the rock mass fragments are dried through the heating pipe and then weighed, and the loss ratio of the rock mass in drilling under different water body thicknesses is tested;

3. the motor drives the turntable to rotate, the turntable drives the connecting rod to do circular motion at the joint of the turntable and the connecting rod, the other end of the connecting rod moves left and right, the drying groove is pulled to move left and right by the cross rod, drying of rock mass fragments is accelerated, and weighing of the fragments can be timely carried out;

in summary, the rock mass and the bottom plate made of the same materials of the coal mine and the water tank are arranged to be in contact with the bottom plate, so that material losses of the rock mass and the bottom plate in the drilling process under different water body thicknesses are simulated, and stress contacts are used for monitoring stress, so that the monitoring of the loss ratio and the stress change of the rock mass under different water body thicknesses is realized.

Drawings

FIG. 1 is a schematic diagram of a device for dynamically monitoring the water condition of a roof of a mining working face of a coal mine in real time;

FIG. 2 is an enlarged view of part B of FIG. 1;

FIG. 3 is an enlarged view of part A of FIG. 1;

fig. 4 is a partial rear view of a real-time dynamic monitoring test device for water conditions of a roof of a mining working face of a coal mine.

In the figure: 1 frame body, 2 base, 3 motor one, 4 risers, 5 connecting plates, 6 magnet plates, 7 clamping plates, 8 clamping openings, 9 compression springs, 10 motor two, 11 bidirectional screw rods, 12 sliding blocks, 13 supporting rods, 14 bottom plates, 15 water tanks, 16 stress contacts, 17 rock mass, 18 telescopic rods, 19 motors, 20 extension grooves, 21 piston rods, 22 gears, 23 right angle plates, 24 filter tanks, 25 return pipes, 26 limiting plates, 27 cross rods, 28 drying grooves, 29 heating pipes, 30 weighing sensors, 31 connecting rods and 32 turntables.

Detailed Description

The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

Referring to fig. 1-4, a real-time dynamic monitoring test device for water conditions of a roof of a coal mine mining working face comprises a frame body 1 and a base 2, wherein a first motor 3 is fixed on the inner wall of the base 2, a driving end of the first motor 3 is fixedly connected with the outer wall of the frame body 1, a clamping mechanism is arranged between the frame body 1 and the base 2 and comprises a vertical plate 4 fixed on the inner bottom wall of the base 2, a connecting plate 5 is fixed at the upper end of the vertical plate 4, a clamping plate 7 is inserted on the connecting plate 5 in a sliding manner, a bayonet 8 matched with the clamping plate 7 is arranged on the outer wall of the frame body 1, a magnet plate 6 is fixedly sleeved on the outer wall of the clamping plate 7, an electromagnet is fixedly embedded on the connecting plate 5, one end, far away from the bayonet 8, of the clamping plate 7 is fixedly connected with a compression spring 9 between the inner wall of the base 2, the first motor 3 and the electromagnet are connected with an external power supply through a wire, a switch is arranged on the wire, and when the power supply is not connected, the clamping plate 7 is clamped into the bayonet 8 under reverse elasticity of the compression spring 9, the clamping plate 1 is clamped into the bayonet 8, and the stability of the frame body is ensured.

The outer wall of the water tank 15 is fixedly provided with a filter tank 24, a screen is arranged in the filter tank 24, a return pipe 25 is connected between the filter tank 24 and the extension tank 20, a water pump connected with the return pipe 25 is arranged in the filter tank 24, a one-way valve is arranged at the joint of the return pipe 25 and the extension tank 20, when water in the filter tank 24 is required to be led out after the test is finished, a first starting motor 3 drives a frame body 1 to rotate to incline, water in the water tank 15 flows out into the filter tank 24 and is filtered through the screen, and the water pump is restarted to return the filtered water pump to the extension tank 20 for recycling.

A bottom plate 14 is fixed in the frame body 1, a rock mass 17 is fixed on the upper side wall of the bottom plate 14, a stress contact 16 positioned at the lower side of the rock mass 17 is also fixedly embedded on the upper side wall of the bottom plate 14, the stress contact 16 is connected with an external stress sensor, a motor II 10 is fixed on the inner wall of the frame body 1, the driving end of the motor II 10 is horizontally arranged and fixed with a bidirectional screw rod 11, slide blocks 12 are sleeved on the outer walls of the two ends of the bidirectional screw rod 11 in a matched mode, the upper side walls of the two slide blocks 12 are rotationally connected with supporting rods 13, a water tank 15 is slidably inserted into the lower side wall of the bottom plate 14, the upper ends of the two supporting rods 13 are rotationally connected with the lower side wall of the water tank 15, an extension groove 20 is connected with an end part of the extension groove 20 in a sliding mode, a supporting plate is fixed on the outer wall of the water tank 15, a gear 22 is mounted at the end part of the supporting plate, the upper side wall of the sliding block 12 positioned on the right side is fixedly provided with a right-angle plate 23, a gear 22 is positioned between a piston rod 21 and the right-angle plate 23, the outer walls of the piston rod 21 and the right-angle plate 23 are respectively provided with saw teeth meshed with the gear 22, a rock mass 17 and a bottom plate 14 are made of materials at the positions of an actual coal mine, a motor II 10 drives a bidirectional screw rod 11 to rotate, the sliding block 12 simultaneously moves inwards or outwards at the bidirectional screw rod 11 to prop up or flatten a supporting rod 13, so that the height of a water tank 15 is increased or decreased, when the height of the water tank 15 is increased, the bottom plate 14 extrudes water in the water tank 15 to flow back into an extension tank 20, so that the thickness of the water in the water tank 15 is decreased, and when the height of the water tank 15 is decreased, the thickness of the water tank 15 is increased, and the conditions of the bottom plate 14 and the rock mass 17 under different water body thicknesses are simulated.

The inner wall of the frame body 1 is fixedly provided with a telescopic rod 18, the driving end of the telescopic rod 18 is fixedly provided with a motor 19, the driving end of the motor 19 is fixedly provided with a drill bit arranged towards the rock body 17, the frame body 1 is internally fixedly provided with a drying groove 28 positioned at one side of the bottom plate 14, the lower side wall of the drying groove 28 is fixedly embedded with a weighing sensor 30, the drying groove 28 is internally fixedly provided with a plurality of heating pipes 29, the frame body 1 is internally fixedly provided with a limiting plate 26, the limiting plate 26 is slidably inserted with a cross rod 27, the end part of the cross rod 27 is fixedly connected with the outer wall of the drying groove 28, the inner wall of the frame body 1 is fixedly provided with a motor III, the driving end of the motor III is fixedly provided with a rotary table 32, the outer wall of the rotary table 32 is rotationally connected with a connecting rod 31, the other end of the connecting rod 31 is rotationally connected with the end part of the cross rod 27, the junction of connecting rod 31 and carousel 32 deviates from carousel 32's centre of a circle setting, after adjusting the height of water, telescopic link 18 drives motor 19 and removes, make the drill bit and rock mass 17 contact, carry out the brill and move, and carry out the monitoring of stress variation in real time through stress contact 16, rock mass 17 fragment that gets down falls into stoving inslot 28, weigh after drying through heating pipe 29, the loss ratio of rock mass 17 when boring under the different water thickness is tested, the motor drives carousel 32 rotation, carousel 32 drives connecting rod 31 and its junction and moves circularly, the other end of connecting rod 31 is moved about, through horizontal pole 27 pulling stoving inslot 28 about, accelerate the stoving of rock mass 17 fragment, can in time carry out the weighing of fragment.

The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

1. The utility model provides a real-time dynamic monitoring test device of colliery mining working face roof water regime, includes framework (1) and base (2), its characterized in that, the inner wall of base (2) is fixed with motor one (3), the drive end of motor one (3) and the outer wall fixed connection of framework (1), be equipped with screens mechanism between framework (1) and base (2), framework (1) internal fixation has bottom plate (14), the upper side wall of bottom plate (14) is fixed with rock mass (17), the upper side wall of bottom plate (14) still fixed inlay establish with be located stress contact (16) of rock mass (17) downside, be fixed with motor two (10) on the inner wall of framework (1), the drive end level of motor two (10) sets up and is fixed with two-way lead screw (11), the equal cooperation cover in both ends outer wall of two-way lead screw (11) is equipped with slider (12) the upper side wall of slider (12) all rotates and is connected with bracing piece (13), the lower side wall slip of bottom plate (14) is equipped with bottom plate (15), the upper side wall of bottom plate (14) is fixed with rock mass (17), the upper side wall (15) is connected with the extension of side wall (20) of basin (20), the end part of the support plate is provided with a gear (22), the upper side wall of the sliding block (12) positioned on the right side is fixedly provided with a right-angle plate (23), the gear (22) is positioned between the piston rod (21) and the right-angle plate (23), and the outer walls of the piston rod (21) and the right-angle plate (23) are provided with saw teeth meshed with the gear (22).

2. The device for dynamically monitoring and testing the water condition of the roof of the working face of the coal mine according to claim 1, wherein the clamping mechanism comprises a vertical plate (4) fixed on the inner bottom wall of the base (2), a connecting plate (5) is fixed at the upper end of the vertical plate (4), a clamping plate (7) is inserted on the connecting plate (5) in a sliding manner, a bayonet (8) matched with the clamping plate (7) is arranged on the outer wall of the frame (1), a magnet plate (6) is fixedly sleeved on the outer wall of the clamping plate (7), an electromagnet is fixedly embedded on the connecting plate (5), and a compression spring (9) is fixedly connected between one end, away from the bayonet (8), of the clamping plate (7) and the inner wall of the base (2).

3. The real-time dynamic monitoring test device for the water condition of the roof of the mining working face of the coal mine according to claim 1, wherein a telescopic rod (18) is fixed on the inner wall of the frame body (1), a motor (19) is fixed on the driving end of the telescopic rod (18), and a drill bit arranged towards a rock mass (17) is fixed on the driving end of the motor (19).

4. The device for dynamically monitoring and testing the water condition of the roof of the mining working face of the coal mine in real time according to claim 1 is characterized in that a drying groove (28) positioned on one side of a bottom plate (14) is fixed in the frame body (1), a weighing sensor (30) is fixedly embedded in the lower side wall of the drying groove (28), and a plurality of heating pipes (29) are fixed in the drying groove (28).

5. The device for dynamically monitoring and testing the water conditions of the roof of the mining working face of the coal mine according to claim 1, wherein a limiting plate (26) is fixed in the frame body (1), a cross rod (27) is inserted on the limiting plate (26) in a sliding mode, the end portion of the cross rod (27) is fixedly connected with the outer wall of a drying groove (28), a motor III is fixed on the inner wall of the frame body (1), a rotary table (32) is fixed on the driving end of the motor III, a connecting rod (31) is connected to the outer wall of the rotary table (32) in a rotary mode, and the other end of the connecting rod (31) is connected with the end portion of the cross rod (27) in a rotary mode.

6. The device for dynamically monitoring and testing the water condition of the roof of the mining working face of the coal mine in real time according to claim 5, wherein the joint of the connecting rod (31) and the rotary table (32) is deviated from the center of the rotary table (32).

7. The real-time dynamic monitoring test device for the water condition of the roof of the coal mine mining working face according to claim 1, wherein a filter tank (24) is fixed on the outer wall of the water tank (15), a screen is arranged in the filter tank (24), a return pipe (25) is connected between the filter tank (24) and the extension tank (20), a water pump connected with the return pipe (25) is arranged in the filter tank (24), and a one-way valve is arranged at the joint of the return pipe (25) and the extension tank (20).