Coal Mine Pressure Prediction and Analysis Device

Abstract

The present invention discloses a device for predicting and analyzing mine pressure, which includes a cylindrical housing. At the front end of the cylindrical housing, there is a conical end (bullet-shaped, which can better push the pressure sensor device into the borehole). On the cylindrical housing, there is a group of pressure sensor mounting holes perpendicular to the center line of the cylindrical housing, and a pressure sensor is fixed in each pressure sensor mounting hole. After being powered on, the strong capacitor wire is melted, so that the stress sheet fully contacts the borehole wall, which can better predict the stress situation at each location and provide theoretical guidance for the subsequent working face mining. The present invention overcomes some disadvantages of the original stress meter. At the same time, it has the advantages of relatively simple structure, simple and flexible operation, and low manufacturing cost, which is conducive to arranging monitoring points in a large range in the mine, preventing disasters caused by sudden mine stress, and ensuring the safe and efficient production of the mine.

Description

Technical Field

[0001] The present invention relates to an underground mine pressure monitoring and prediction device. Background Art

[0002] With the continuous development of coal mine science and technology in China, in recent years, the scale of coal mine exploitation has been continuously expanding, and the mining depth has been continuously increasing. The disasters caused by mine pressure have become more and more obvious. Due to the influence of mine exploitation activities, a pressure is generated in the surrounding surrounding rock mass and acts on the roadway chamber support. At the same time, the action of mine pressure will cause mechanical action between rock layers, and then cause various mechanical phenomena. Such as rock mass deformation, damage, collapse, support structure deformation, damage and breakage, etc. Even mine rock burst safety accidents will occur, seriously affecting the mining activities and economic benefits of mining enterprises. Therefore, proposing to predict mine pressure is an important measure to ensure the smooth progress of mine exploitation work. Therefore, designing a mine pressure prediction and analysis device is a technical problem that needs to be solved at present. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a mine pressure prediction and analysis device.

[0004] The technical solution for the present invention to solve its technical problems is as follows:

[0005] The mine pressure prediction and analysis device includes a cylindrical shell. At the front end of the cylindrical shell, there is a conical end (bullet shape, which can better push the pressure sensor device into the drill hole). On the cylindrical shell, there is a group of pressure sensor mounting holes perpendicular to the center line of the cylindrical shell, and a pressure sensor is fixed in each pressure sensor mounting hole.

[0006] As a preferred solution of the present invention, the cylindrical shell has multiple sections, and adjacent cylindrical shells are connected through a connecting part. On each section of the cylindrical shell, there is a group of pressure sensor mounting holes, and a pressure sensor is fixed in the pressure sensor mounting hole of each section of the cylindrical shell. The conical end is provided on the frontmost section of the cylindrical shell.

[0007] As a preferred solution of the present invention, at the tail of each section of the cylindrical shell except the last section, there is an external thread for connection, and at the front end of other sections of the cylindrical shell, there is an internal thread for connection. The connecting part is the external thread for connection and the internal thread for connection of adjacent sections of the cylindrical shell.

[0008] As a preferred embodiment of the present invention, the pressure sensor is composed of a pressure sensing sheet, a pressure bearing plate, a high-pressure spring, two spring clip holders, a convex anti-disengagement cap and a tensile fusing wire. The pressure sensing sheet is fixed on the bottom surface of the pressure bearing plate. The two spring clip holders are symmetrically arranged, one of which is fixed on the top surface of the pressure bearing plate, and a convex anti-disengagement cap is fixed on the other spring clip holder. The tensile fusing wire is connected between the two spring clip holders. The high-pressure spring is sleeved on the two spring clip holders under a certain compression amount. The pressure sensing sheet is connected to the prediction and analysis device through a pressure sensing sheet connection wire. The pressure sensor is fixed to the cylindrical shell through a bearing plate connection device. In this way, it remains in a contracted state before being sent into the drill hole. When reaching the detection position, a fusing current is passed through to release the spring pressure, so that the convex anti-disengagement cap is in precise contact with the drill hole wall, making the experimental results more accurate.

[0009] As a preferred embodiment of the present invention, there are 4 pressure sensor mounting holes, and the 4 pressure sensor mounting holes are circumferentially evenly distributed on the cylindrical shell. The bearing plate connection device welds the 4 pressure bearing plates into a square. This is beneficial for the average distribution of force.

[0010] As a preferred embodiment of the present invention, the number of sections of the cylindrical shell is 3, and the pressure sensors on each section of the cylindrical shell are staggered.

[0011] As a preferred embodiment of the present invention, an infrared measuring instrument for detecting the displacement change of the high-pressure spring under pressure is fixed on the pressure bearing plate.

[0012] As a preferred embodiment of the present invention, the prediction and analysis device is composed of a signal processing circuit, a conversion circuit, a central processor and a central LED display screen. The data of the pressure sensing sheet and the infrared measuring instrument enter the central processor through the signal processing circuit and the conversion circuit. The central processor separates the non-conforming data, analyzes the valid data, and then obtains a dynamic curve through the central LED display screen to predict the pressure condition. If the pressure exceeds the specified range, the buzzer will give an alarm, providing a reliable basis for the safe production of the working face.

[0013] Compared with the prior art, the present invention:

[0014] 1. The process performance of the present invention is reliable; the equipment is mature and general, the processing technology of non-standard structural parts is simple, and it is not difficult to implement due to the limitation of processing equipment; the equipment and materials are common and easy to purchase;

[0015] 2. The present invention can effectively predict the stress of roadway surrounding rock. When the surrounding rock stress exceeds the safe specified stress, the buzzer will give an alarm, providing a reliable basis for preventing disasters such as roof falls, roadway collapses, and rock bursts, thus ensuring the safe production of the working face. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the equipment layout of the present invention;

[0017] Figure 2 is Figure 1 A-A sectional view of;

[0018] Figure 3 is Figure 1 Schematic diagram of the structure of the middle part 3 in;

[0019] Figure 4 Schematic circuit diagram;

[0020] In the figure, 1 is the end of the pressure sensor, 2 is the sensor connection part, 3 is the convex anti-disconnection cap, 4 is the tensile fusing wire, 5 is the spring clip, 6 is the pressure bearing plate, 7 is the bearing plate connection device, 8 is the pressure sensing piece, 9 is the pressure sensing piece connection wire, 10 is the infrared measuring instrument, and 11 is the high-pressure spring. Specific implementation manner

[0021] As shown in the figure, the mine pressure prediction and analysis device includes a cylindrical shell. At the front end of the cylindrical shell, there is a conical end 1. On the cylindrical shell, there is a group of pressure sensor mounting holes perpendicular to the center line of the cylindrical shell, and a pressure sensor is fixed in each pressure sensor mounting hole.

[0022] The cylindrical shell has multiple sections. Adjacent cylindrical shells are connected by a connection part 2. On each section of the cylindrical shell, there is a group of pressure sensor mounting holes, and a pressure sensor is fixed in the pressure sensor mounting hole of each section of the cylindrical shell. The conical end 1 is provided on the frontmost section of the cylindrical shell.

[0023] At the tail of each section of the cylindrical shell except the last section, there is an external thread for connection. At the front end of other sections of the cylindrical shell, there is an internal thread for connection. The connection part 2 is the external thread for connection and the internal thread for connection of adjacent sections of the cylindrical shell.

[0024] The pressure sensor described is composed of a pressure sensing sheet 8, a pressure bearing plate 6, a high-pressure spring 11, two spring clip holders 5, a convex anti-disengagement cap 3, and a tensile fusing wire 4. The pressure sensing sheet 8 is fixed on the bottom surface of the pressure bearing plate 6. The two spring clip holders 5 are symmetrically arranged, one of which is fixed on the top surface of the pressure bearing plate 6, and a convex anti-disengagement cap 3 is fixed on the other spring clip holder 5. The tensile fusing wire 4 is connected between the two spring clip holders 5. The high-pressure spring 11 is sleeved on the two spring clip holders 5 with a certain compression amount. The pressure sensing sheet 8 is connected to the prediction and analysis device through a pressure induction sheet connection wire 9. The pressure sensor is fixed to the cylindrical shell through a bearing plate connection device 7. In this way, it remains in a contracted state before being sent into the drill hole. When it reaches the detection position, a fusing current is passed through to release the spring pressure, so that the convex anti-disengagement cap 3 is in precise contact with the drill hole wall, making the experimental results more accurate.

[0025] There are 4 pressure sensor mounting holes in a group, and the 4 pressure sensor mounting holes are circumferentially evenly distributed on the cylindrical shell. The bearing plate connection device 7 welds the 4 pressure bearing plates 6 into a square. This is beneficial for the average distribution of force.

[0026] The number of sections of the cylindrical shell is 3, and the pressure sensors on each section of the cylindrical shell are staggered.

[0027] An infrared measuring instrument 10 for detecting the displacement change of the high-pressure spring 11 under pressure is fixed on the pressure bearing plate 6.

[0028] The prediction and analysis device described is composed of a signal processing circuit, a conversion circuit, a central processor, and a central LED display screen. The data of the pressure sensing sheet 8 and the infrared measuring instrument 10 enter the central processor through the signal processing circuit and the conversion circuit. The central processor separates the non-conforming data, analyzes the valid data, and then obtains a dynamic curve through the central LED display screen to predict the pressure condition. If the pressure exceeds the specified range, the buzzer will give an alarm, providing a reliable basis for the safe production of the working face.

[0029] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions, or substitutions made by those skilled in the art within the essence of the present invention should also fall within the protection scope of the invention.

Claims

1. Mine pressure prediction and analysis device, including a cylindrical shell, Characterized in that, At the front end of the cylindrical shell, there is a conical end (1). On the cylindrical shell, there is a group of pressure sensor mounting holes perpendicular to the center line of the cylindrical shell. In each pressure sensor mounting hole, a pressure sensor is fixed; The cylindrical shell has multiple sections. Adjacent cylindrical shells are connected by a connecting part (2). On each section of the cylindrical shell, there is a group of pressure sensor mounting holes. In the pressure sensor mounting holes of each section of the cylindrical shell, a pressure sensor is fixed. The conical end (1) is arranged on the frontmost section of the cylindrical shell; At the tail of each section of the cylindrical shell except the last section, there is an external thread for connection. At the front end of other sections of the cylindrical shell, there is an internal thread for connection. The connecting part (2) is the external thread for connection and the internal thread for connection of adjacent sections of the cylindrical shell; The pressure sensor is composed of a pressure sensing sheet (8), a pressure bearing plate (6), a high-pressure spring (11), two spring clip holders (5), a convex anti-detachment cap (3), and a tensile fuse wire (4). The pressure sensing sheet (8) is fixed on the bottom surface of the pressure bearing plate (6). The two spring clip holders (5) are symmetrically arranged. One of them is fixed on the top surface of the pressure bearing plate (6). A convex anti-detachment cap (3) is fixed on the other spring clip holder (5). The tensile fuse wire (4) is connected between the two spring clip holders (5). The high-pressure spring (11) is sleeved on the two spring clip holders (5) under a certain compression amount. The pressure sensing sheet (8) is connected to the prediction and analysis device through a pressure induction sheet connection wire (9). The pressure sensor is fixed to the cylindrical shell through a bearing plate connection device (7); Before the high-pressure spring (11) is sent into the drill hole, it remains in a contracted state. When it reaches the detection position, a fusing current is passed to release the spring pressure.

2. The mine pressure prediction and analysis device according to claim 1, Characterized in that, A group of pressure sensor mounting holes are 4. The 4 pressure sensor mounting holes are circumferentially evenly distributed on the cylindrical shell. The bearing plate connection device (7) welds the 4 pressure bearing plates (6) into a square.

3. The mine pressure prediction and analysis device according to claim 2, Characterized in that, The number of sections of the cylindrical shell is 3. The pressure sensors on each section of the cylindrical shell are staggered.

4. The mine pressure prediction and analysis device according to claim 3, Characterized in that, An infrared measuring instrument (10) for detecting the displacement change of the high-pressure spring (11) under pressure is fixed on the pressure bearing plate (6).

5. The mine pressure prediction and analysis device according to claim 4, Characterized in that, The prediction and analysis device is composed of a signal processing circuit, a conversion circuit, a central processor, and a central LED display screen. The data of the pressure sensing sheet (8) and the infrared measuring instrument (10) enter the central processor through the signal processing circuit and the conversion circuit. The central processor separates the non-conforming data, analyzes the valid data, and then obtains a dynamic curve through the central LED display screen to predict the pressure condition. If it exceeds the specified pressure range, the buzzer gives an alarm, providing a reliable basis for the safe production of the working face.

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