A device for predicting and analyzing mine pressure

Abstract

The present invention discloses a mine pressure prediction and analysis device, including a bottom plate. Installation bolts are fixedly provided at the four corners of the top end of the bottom plate. A through hole is opened in the middle of the bottom end of the bottom plate. A ball bearing is fixedly provided in the middle of the top end of the bottom plate. A device housing is provided in the middle of the ball bearing. The device housing includes a housing fixedly connected to the middle of the ball bearing and four vertical strip-shaped holes opened on the circumferential side of the housing. An installation structure is provided at the top end of the housing. Through the provided lateral monitoring structure, the magnitude of the mine pressure is reflected by the deformation amount generated by the first elastic piece under the extrusion of the rock wall. There is no protruding part, and the baffle blocks the longitudinal pressure, making it difficult for the first elastic piece to be affected by the pressure in other directions, so that the device will not be damaged due to the pressure in other directions; by using the steel ring in cooperation with the lateral monitoring structure, the steel ring squeezes the first elastic piece into the device housing, expanding the measurement range.

Description

Technical Field

[0001] The present invention relates to a mine pressure monitoring device, specifically a mine pressure prediction and analysis device. Background Art

[0002] Before the ore body is mined, the rock mass is in a balanced state. When the ore body is mined, an underground space is formed, which destroys the original stress of the rock mass, causes the stress of the rock mass to redistribute, and continues until a new balance is formed in the rock mass; during the process of stress redistribution, the surrounding rock deforms, moves, and is damaged, thus generating pressure on the working face, roadway, and surrounding rock; generally, the force generated by the rock movement caused by the mining process on the support surrounding rock is called mine pressure.

[0003] According to the "Mine Pressure Prediction and Analysis Device" disclosed in the Chinese invention (application number: CN202010316677.1), it 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. After being powered on, the strong capacitor wire is melted, so that the stress piece fully contacts the drill hole wall, which can better predict the stress condition at each location and provide theoretical guidance for the subsequent working face mining. The present invention overcomes some disadvantages of the original stress gauge. At the same time, it has the advantages of relatively simple structure, simple and flexible operation, and low manufacturing cost, which is beneficial to arranging monitoring points in a large area in the mine, preventing disasters caused by sudden mine stress, and ensuring the safe and efficient production of the mine.

[0004] When the above mine pressure prediction and analysis device is in use, it cannot detect the mine pressure perpendicular to the well wall direction. However, the mine pressure perpendicular to the well wall direction is more dangerous. At the same time, the mine pressure perpendicular to the well wall direction will damage the spring clamp, affecting the accuracy of measuring the mine pressure.

[0005] According to the "Coal Mine Mine Pressure Monitoring Detector" disclosed in the Chinese utility model (application number: 201620487929.6), its composition includes a shell, a mine digital pressure gauge, a controller, an alarm, a power supply box, and a locator; the mine digital pressure gauge, controller, alarm, power supply box, and locator are located inside the shell. Among them, the mine digital pressure gauge is located at the bottom inside the shell, the power supply box and the controller are fixedly arranged in the middle inside the shell, and the locator and the alarm are fixedly arranged at the upper part inside the shell; one end of the mine digital pressure gauge is connected to the power supply box through a wire, and the other end is connected to the controller through a wire; the controller is connected to the alarm through a wire; the locator is connected to the power supply box through a wire. This device combines the functions of coal mine mine pressure monitoring and alarm, and also is provided with a walkie-talkie, a locator, and a searchlight, with comprehensive functions, playing a role in protecting the safety of workers in a timely manner; this device is also provided with a backpack strap for convenient carrying and working.

[0006] When the above coal mine ground pressure monitoring detector is in use, it is not suitable for installation in the rock mass around the mine, resulting in the device being unable to accurately measure the ground pressure. Therefore, we made improvements to this and proposed a ground pressure prediction and analysis device. Summary of the Invention

[0007] To solve the defects existing in the prior art, the present invention provides a ground pressure prediction and analysis device.

[0008] To solve the above technical problems, the present invention provides the following technical solutions:

[0009] A ground pressure prediction and analysis device for a coal mine ground pressure monitoring detector of the present invention includes a bottom plate. Installation bolts are fixedly provided at the four corners of the top end of the bottom plate. A through hole is opened in the middle of the bottom end of the bottom plate. A ball bearing is fixedly provided in the middle of the top end of the bottom plate. A device housing is provided in the middle of the ball bearing. The device housing includes a housing fixedly connected to the middle of the ball bearing and four vertical strip-shaped holes opened on the circumferential side of the housing. An installation structure is provided at the top end of the housing. The installation structure includes an installation cylinder fixedly connected to the top end of the housing. Four card slots are opened at the top end inside the installation cylinder. A hexagonal groove is opened in the middle of the bottom end of the installation cylinder. A longitudinal pressure sensor is provided inside the installation cylinder. A force-bearing end is fixedly provided at the monitoring end of the longitudinal pressure sensor. A protective cover is provided at the top of the force-bearing end. A lateral monitoring structure is provided inside the housing. The lateral monitoring structure includes four first sliding rods. First elastic pieces located inside the vertical strip-shaped holes are fixedly provided on the side of the first sliding rods. A first sliding ring sleeved on the first sliding rod is fixedly provided at the end of the first elastic piece. A lateral pressure sensor is fixedly provided at the bottom of the first elastic piece. The lateral pressure sensor passes through the bottom plate.

[0010] As a preferred technical solution of the present invention, the lateral monitoring structure further includes a second sliding rod. The second sliding rod is located between adjacent lateral monitoring structures. A second sliding ring is sleeved on the second sliding rod. A second elastic piece is provided on the side of the second sliding rod. One end of the second elastic piece is fixedly connected to the second sliding ring. The other end of the second elastic piece is fixedly connected to the second sliding rod. The second sliding rod has the same structure as the first sliding rod. The second sliding ring has the same structure as the first sliding ring. The elastic force of the second elastic piece is greater than that of the first elastic piece.

[0011] As a preferred technical solution of the present invention, the protective cover includes an annular cover. Four groups of equally spaced telescopic rods are fixedly provided inside the annular cover. The telescopic rods are in contact with the force-bearing end. Springs are sleeved on the telescopic rods. A top cover is fixedly provided at the top of the annular cover.

[0012] As a preferred technical solution of the present invention, a baffle is fixedly provided on the circumferential side of the mounting cylinder, and grinding teeth are provided on the circumferential side of the baffle.

[0013] As a preferred technical solution of the present invention, a steel ring is sleeved on the circumferential side of the mounting cylinder and is located at the bottom of the baffle.

[0014] As a preferred technical solution of the present invention, a rubber sleeve is fixedly provided at the bottom end of the steel ring, and four arc-shaped pieces opposite to the first elastic piece are fixedly provided inside the rubber sleeve.

[0015] As a preferred technical solution of the present invention, the grinding teeth are inclined at 45 degrees in the vertical direction, and the tips of the grinding teeth are inclined in a single direction, either clockwise or counterclockwise.

[0016] As a preferred technical solution of the present invention, the telescopic rod is composed of an inner rod and an outer sleeve sleeved on the inner rod. The outer sleeve is fixedly connected to the inner surface of the annular cover. The end of the inner rod contacts the circumferential side of the force-bearing end, and one end of the spring is fixedly connected to the circumferential side of the end of the inner rod.

[0017] As a preferred technical solution of the present invention, anti-slip patterns are provided on the circumferential sides of both the steel ring and the force-bearing end.

[0018] The beneficial effects of the present invention are as follows: This kind of mine pressure prediction and analysis device:

[0019] Through the provided lateral monitoring structure, the magnitude of the mine pressure is reflected by the deformation amount generated by the first elastic piece when it is squeezed by the rock wall. There are no protruding parts, and the baffle blocks the longitudinal pressure, making it difficult for the first elastic piece to be affected by the pressure in other directions, so that the device will not be damaged due to the pressure in other directions.

[0020] Through the provided protective cover, when the device is subjected to lateral pressure, the annular cover is displaced under force, and the annular cover and the spring can expand and contract, reducing the displacement of the protective cover from affecting the force-bearing end. The protective cover eliminates the damage caused by the lateral pressure to the force-bearing end and improves the accuracy of measuring the longitudinal pressure.

[0021] By using the steel ring in cooperation with the lateral monitoring structure, the steel ring squeezes the first elastic piece into the device housing, and then rotates the mounting cylinder to rotate the device housing. The second elastic piece pops out when it reaches the position of the vertical strip hole, so that elastic pieces with different elasticities can be replaced, expanding the measurement range.

[0022] Through the provided rubber sleeve, the lateral monitoring structure is wrapped by the rubber sleeve to prevent the sand and gravel on the hole wall from falling into the device gap and affecting the measurement of the mine pressure by the device.

[0023] By providing an arc-shaped piece, the arc-shaped piece bears the pressure and then transfers it to the first elastic piece. The arc-shaped piece has a larger stress-bearing area, so the monitored area can be larger. At the same time, it is more sensitive to mine pressure and reduces errors.

[0024] By using the grinding teeth in cooperation with the transmission structure, the transmission rod is installed on the electric drill. The hexagonal block extends into the hexagonal groove through the through hole and gets stuck. At this time, the small bearing is located in the through hole. The electric drill drives the baffle to rotate, and the grinding teeth smooth the hole wall to make the hole wall smoother.

[0025] By using the drill bit in cooperation with the transmission structure, when drilling, the longitudinal pressure sensor is removed, and the handle part replaces the position of the longitudinal pressure sensor. The clamping block is stuck into the clamping groove, and the hexagonal block is in the hexagonal groove. The electric drill drives the hexagonal block to rotate, and the hexagonal block drives the installation cylinder to rotate, so that the cutting part rotates, and then drilling is carried out through the cutting part, which facilitates the installation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0027] Figure 1 is a schematic structural diagram of a mine pressure prediction and analysis device of the present invention;

[0028] Figure 2 is a schematic structural diagram of the device housing of a mine pressure prediction and analysis device of the present invention;

[0029] Figure 3 is a schematic cross-sectional structural diagram of a mine pressure prediction and analysis device of the present invention;

[0030] Figure 4 is a schematic top cross-sectional structural diagram of the device housing of a mine pressure prediction and analysis device of the present invention;

[0031] Figure 5 is a schematic top structural diagram of the baffle of a mine pressure prediction and analysis device of the present invention;

[0032] Figure 6 is a schematic structural diagram of the drill bit of a mine pressure prediction and analysis device of the present invention;

[0033] Figure 7 is a schematic structural diagram of the transmission structure of a mine pressure prediction and analysis device of the present invention.

[0034] In the figure: 1, bottom plate; 2, mounting bolt; 3, ball bearing; 4, device housing; 41, housing; 42, vertical strip hole; 5, rubber sleeve; 6, steel ring; 7, baffle; 8, mounting structure; 81, mounting cylinder; 82, card slot; 83, hexagon slot; 9, protective cover; 91, annular cover; 92, top cover; 93, telescopic rod; 94, spring; 10, force receiving end; 11, lateral monitoring structure; 111, first sliding rod; 112, first elastic piece; 113, first sliding ring; 114, second sliding rod; 115, second elastic piece; 116, second sliding ring; 12, longitudinal pressure sensor; 13, arc piece; 14, lateral pressure sensor; 15, through hole; 16, grinding tooth; 17, handle part; 18, cutting part; 19, retaining piece; 20, clamping block; 21, transmission rod; 22, small bearing; 23, hexagon block. Detailed implementation mode

[0035] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not used to limit the present invention.

[0036] Embodiment: As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 shown, a mine pressure prediction and analysis device of the present invention includes a bottom plate 1. Mounting bolts 2 are fixedly provided at the four corners of the top end of the bottom plate 1. A through hole 15 is opened in the middle of the bottom end of the bottom plate 1. A ball bearing 3 is fixedly provided in the middle of the top end of the bottom plate 1. A device housing 4 is provided in the middle of the ball bearing 3. The device housing 4 includes a housing 41 fixedly connected to the middle of the ball bearing 3 and four vertical strip holes 42 opened on the circumferential side of the housing 41. An installation structure 8 is provided at the top end of the housing 41. The installation structure 8 includes an installation cylinder 81 fixedly connected to the top end of the housing 41. Four card slots 82 are opened at the top end inside the installation cylinder 81. A hexagon slot 83 is opened in the middle of the bottom end of the installation cylinder 81. A longitudinal pressure sensor 12 is provided inside the installation cylinder 81. A force receiving end 10 is fixedly provided at the monitoring end of the longitudinal pressure sensor 12. A protective cover 9 is provided at the top of the force receiving end 10. A lateral monitoring structure 11 is provided inside the housing 41. The lateral monitoring structure 11 includes four first sliding rods 111. First elastic pieces 112 are fixedly provided on the side of the first sliding rods 111 and are located inside the vertical strip holes 42. First sliding rings 113 sleeved on the first sliding rods 111 are fixedly provided at the ends of the first elastic pieces 112. Lateral pressure sensors 14 are fixedly provided at the bottoms of the first elastic pieces 112. The lateral pressure sensors 14 pass through the bottom plate 1.

[0037] Among them, the lateral monitoring structure 11 further includes a second sliding rod 114. The second sliding rod 114 is located between adjacent lateral monitoring structures 11. A second sliding ring 116 is sleeved on the second sliding rod 114. A second elastic sheet 115 is arranged on the side of the second sliding rod 114. One end of the second elastic sheet 115 is fixedly connected to the second sliding ring 116, and the other end of the second elastic sheet 115 is fixedly connected to the second sliding rod 114. The second sliding rod 114 has the same structure as the first sliding rod 111, the second sliding ring 116 has the same structure as the first sliding ring 113, and the elastic force of the second elastic sheet 115 is greater than that of the first elastic sheet 112, so as to realize the replacement of different elastic sheets and expand the monitoring range.

[0038] Among them, the protective cover 9 includes an annular cover 91. Four groups of equally spaced telescopic rods 93 are fixedly arranged inside the annular cover 91. The telescopic rods 93 are in contact with the force receiving end 10. A spring 94 is sleeved on the telescopic rods 93. A top cover 92 is fixedly arranged on the top of the annular cover 91. The protective cover 9 eliminates the damage caused by lateral pressure to the force receiving end 10 and improves the accuracy of measuring the longitudinal pressure.

[0039] Among them, a baffle 7 is fixedly arranged on the circumferential side of the mounting cylinder 81. Grinding teeth 16 are arranged on the circumferential side of the baffle 7 to prevent the longitudinal pressure from affecting the elastic sheet.

[0040] Among them, a steel ring 6 is sleeved on the circumferential side of the mounting cylinder 81 and is located at the bottom of the baffle 7, so as to realize the collection of the first elastic sheet 112 into the device housing 4.

[0041] Among them, a rubber sleeve 5 is fixedly arranged at the bottom end of the steel ring 6. Four arc-shaped sheets 13 opposite to the first elastic sheet 112 are fixedly arranged inside the rubber sleeve 5. The arc-shaped sheets 13 are used to bear the pressure and then transmit it to the first elastic sheet 112. The arc-shaped sheets 13 have a larger force-receiving area, the monitored area can be larger, and it is more sensitive to the mine pressure, reducing the error.

[0042] Among them, the grinding teeth 16 are inclined at 45 degrees in the vertical direction to assist the device in advancing during hole punching, and the tips of the grinding teeth 16 are inclined in a single clockwise or counterclockwise direction, which is conducive to cleaning up the protruding sand and gravel.

[0043] Among them, the telescopic rod 93 is composed of an inner rod and an outer sleeve sleeved on the inner rod. The outer sleeve is fixedly connected to the inner surface of the annular cover 91. The end of the inner rod is in contact with the circumferential side of the force receiving end 10. One end of the spring 94 is fixedly connected to the circumferential side of the end of the inner rod to realize the telescoping of the telescopic rod 93.

[0044] Among them, anti-slip patterns are arranged on the circumferential sides of the steel ring 6 and the force receiving end 10 to facilitate the movement of the steel ring 6 and the force receiving end 10.

[0045] When working, first take out the longitudinal pressure sensor 12 from the mounting cylinder 81, and then install a drill bit in the mounting cylinder 81. The drill bit consists of a shank 17, a cutting part 18, a baffle 19 and four clamping blocks 20. The baffle 19 can prevent sand and gravel from entering the device. The shank 17 is fixedly inserted through the middle of the baffle 19. The cutting part 18 is fixed to the top end of the shank 17. The four clamping blocks 20 are fixedly connected to the circumferential side of the shank 17. Insert the shank 17 into the mounting cylinder 81, and the clamping blocks 20 are clamped in the card slots 82. Then install the transmission structure on the electric drill. The transmission structure includes a transmission rod 21, a hexagonal block 23 fixedly connected to the end of the transmission rod 21, and a small bearing 22 fixedly sleeved on the surface of the transmission rod 21. Clamp the transmission rod 21 with the clamp of the electric drill. The hexagonal block 23 passes through the through hole 15 and then is inserted into the hexagonal groove 83. At this time, the small bearing 22 just inserts into the through hole 15. The small bearing 22 can provide support and reduce the probability of the transmission rod 21 breaking. Drive the hexagonal block 23 to rotate by the electric drill. The hexagonal block 23 drives the mounting cylinder 81 to rotate, so that the cutting part 18 rotates, and then drill a hole through the cutting part 18, which facilitates the installation of the device. At the same time, the baffle 7 will also rotate, and the grinding teeth 16 smooth the hole wall to make the hole wall smoother. After drilling, remove the drill bit and the transmission structure, install the longitudinal pressure sensor 12 back, and then put the device into the hole. The bottom plate 1 is located at the hole opening, and then fix the bottom plate 1 to the well wall through the mounting bolt 2. When the device receives longitudinal pressure, the pressure pushes the protective cover 9 to move, and then pushes the force receiving end 10 so that the longitudinal pressure sensor 12 senses the pressure. When the device is subjected to lateral pressure, the annular cover 91 is stressed and displaced. The annular cover 91 and the spring 94 can be telescopic, reducing the displacement of the protective cover 9 from affecting the force receiving end 10. The protective cover 9 eliminates the damage caused by the lateral pressure to the force receiving end 10 and improves the accuracy of measuring the longitudinal pressure. When measuring the lateral pressure, the deformation amount generated by the first elastic piece 112 being squeezed by the rock wall reflects the magnitude of the mine pressure. The lateral pressure sensor 14 monitors the displacement of the first slip ring 113 on the surface of the first slide bar 111. There is no protruding part, and the baffle 7 blocks the longitudinal pressure, making it difficult for the first elastic piece 112 to be affected by the pressure in other directions, so that the device will not be damaged due to the pressure in other directions. The steel ring 6 squeezes the first elastic piece 112 into the device housing 4, and then rotate the mounting cylinder 81 so that the device housing 4 rotates through the ball bearing 3. The second elastic piece 115 pops out when it reaches the position of the vertical strip hole 42, so that elastic pieces with different elasticities can be replaced to expand the measurement range.

[0046] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A mine pressure prediction and analysis device, including a bottom plate (1), characterized in that, At the four corners of the top end of the bottom plate (1), mounting bolts (2) are fixedly provided. In the middle of the bottom end of the bottom plate (1), a through hole (15) is opened. In the middle of the top end of the bottom plate (1), a ball bearing (3) is fixedly provided. In the middle of the ball bearing (3), a device housing (4) is provided. The device housing (4) includes a housing (41) fixedly connected to the middle of the ball bearing (3) and four vertical strip-shaped holes (42) opened on the circumferential side of the housing (41). At the top end of the housing (41), an installation structure (8) is provided. The installation structure (8) includes an installation cylinder (81) fixedly connected to the top end of the housing (41). At the top end inside the installation cylinder (81), four card slots (82) are opened. In the middle of the bottom end of the installation cylinder (81), a hexagonal slot (83) is opened. Inside the installation cylinder (81), a longitudinal pressure sensor (12) is provided. At the monitoring end of the longitudinal pressure sensor (12), a force-bearing end (10) is fixedly provided. At the top of the force-bearing end (10), a protective cover (9) is provided. Inside the housing (41), a lateral monitoring structure (11) is provided. The lateral monitoring structure (11) includes four first sliding rods (111). On the side of the first sliding rod (111), a first elastic piece (112) located inside the vertical strip-shaped hole (42) is fixedly provided. At the end of the first elastic piece (112), a first sliding ring (113) sleeved on the first sliding rod (111) is fixedly provided. At the bottom of the first elastic piece (112), a lateral pressure sensor (14) is fixedly provided. The lateral pressure sensor (14) passes through the bottom plate (1).

2. The ground pressure prediction and analysis device according to claim 1, characterized in that The lateral monitoring structure (11) further includes a second sliding rod (114). The second sliding rod (114) is located between adjacent lateral monitoring structures (11). A second sliding ring (116) is sleeved on the second sliding rod (114). On the side of the second sliding rod (114), a second elastic piece (115) is provided. One end of the second elastic piece (115) is fixedly connected to the second sliding ring (116). The other end of the second elastic piece (115) is fixedly connected to the second sliding rod (114). The second sliding rod (114) has the same structure as the first sliding rod (111). The second sliding ring (116) has the same structure as the first sliding ring (113). The elastic force of the second elastic piece (115) is greater than that of the first elastic piece (112).

3. A strata pressure prediction and analysis device according to claim 1, characterized in that, The protective cover (9) includes an annular cover (91). Inside the annular cover (91), four groups of equally spaced telescopic rods (93) are fixedly provided. The telescopic rods (93) are in contact with the force-bearing end (10). A spring (94) is sleeved on the telescopic rods (93). At the top of the annular cover (91), a top cover (92) is fixedly provided.

4. A ground pressure prediction and analysis device according to claim 1, wherein On the circumferential side of the installation cylinder (81), a baffle (7) is fixedly provided. On the circumferential side of the baffle (7), grinding teeth (16) are provided.

5. The strata pressure prediction and analysis device according to claim 1, wherein A steel ring (6) is sleeved on the circumferential side of the installation cylinder (81) and is located at the bottom of the baffle (7).

6. The rock pressure prediction and analysis device according to claim 5, characterized in that, A rubber sleeve (5) is fixedly provided at the bottom end of the steel ring (6), and four arc-shaped pieces (13) opposite to the first elastic pieces (112) are fixedly provided inside the rubber sleeve (5).

7. The strata pressure prediction and analysis device according to claim 4, wherein The grinding teeth (16) are inclined at 45 degrees in the vertical direction, and the tips of the grinding teeth (16) are inclined in a single clockwise or counterclockwise direction.

8. The rock pressure prediction and analysis device according to claim 3, characterized in that The telescopic rod (93) is composed of an inner rod and an outer sleeve sleeved on the inner rod. The outer sleeve is fixedly connected to the inner surface of the annular cover (91). The end of the inner rod contacts the circumferential side of the force-bearing end (10), and one end of the spring (94) is fixedly connected to the circumferential side of the end of the inner rod.

9. The rock pressure prediction and analysis device according to claim 5, characterized in that, Anti-slip patterns are provided on the circumferential sides of the steel ring (6) and the force-bearing end (10).

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