Rock burst monitoring device
By designing a rockburst monitoring device with a support cylinder, drill rod, and testing components, the problems of accuracy and economic loss in the detection of different rock strata and weak rock strata were solved, and efficient and accurate rockburst monitoring was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
- Filing Date
- 2025-08-05
- Publication Date
- 2026-05-19
AI Technical Summary
Existing rock burst monitoring devices around coal mine tunnels suffer from insufficient accuracy and economic losses when detecting different rock strata types and weak rock strata.
An impact ground pressure monitoring device was designed, comprising a controller, a support mechanism, and a detection mechanism. The device uses a support cylinder, drill rod, and testing components to support the borehole with an electric push rod and an arc-shaped baffle. Combined with a pressure sensor and a display screen, it can achieve accurate detection of different depths and rock types, and prevent the collapse of weak rock layers.
It improves the accuracy and flexibility of rockburst monitoring, prevents the collapse of weak rock layers, realizes real-time numerical display and efficient detection, and reduces economic losses.
Smart Images
Figure CN224262685U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rock mass rockburst monitoring technology, and specifically to a rockburst monitoring device. Background Technology
[0002] Rockburst, also known as rock burst, is a sudden and violent destructive force phenomenon that occurs in the rock mass surrounding the working face of a coal mine due to the instantaneous release of elastic deformation energy. It is often accompanied by the ejection of coal and rock mass, loud noises, and blast waves. It is highly destructive and is one of the major hazards in coal mines. Currently, the main methods for monitoring and early warning of rockbursts in coal mines include: empirical analogy, drill cuttings method, and mine pressure monitoring method.
[0003] Existing rock burst control devices around coal mine tunnels have the following shortcomings:
[0004] 1. When encountering different types of rock formations, the required borehole depth for detecting rock bursts varies. If detection components with the same stroke are used for rock burst detection, the accuracy of the detection will be severely reduced.
[0005] 2. When encountering rock burst detection work in weak rock strata, the rock strata on the inner wall of the borehole become relatively loose after drilling, making them prone to collapse. As a result, the device cannot be removed after the detection work is completed, causing economic losses. Utility Model Content
[0006] The purpose of this invention is to provide a rockburst monitoring device.
[0007] To achieve this objective, the present invention adopts the following technical solution:
[0008] A rockburst monitoring device is provided, comprising a controller, a support mechanism, and a detection mechanism;
[0009] The testing mechanism includes a support cylinder, a drill rod, and a testing component. The support cylinder is horizontally positioned, and the drill rod is slidably mounted on the outer wall of one end of the support cylinder via three guide rods. The testing component is located at the end of the drill rod furthest from the support cylinder.
[0010] The support mechanism is located on the outer wall of the support cylinder. The support mechanism includes a drive assembly and two arc-shaped baffles. The two arc-shaped baffles are symmetrically arranged on the outer wall of the support cylinder. The drive assembly is located on the support cylinder. The test assembly and the drive assembly are electrically connected to the controller.
[0011] Preferably, the test assembly includes a spherical probe, a slide rod, a contact rod, and a pressure sensor. The end of the drill rod away from the support cylinder has a sliding cavity, and the slide rod is slidably disposed inside the sliding cavity. The spherical probe and the contact rod are respectively fixed at both ends of the slide rod. The end of the drill rod away from the support cylinder has a sliding hole for the contact rod to slide through. The pressure sensor is fixedly disposed at the end of the sliding hole away from the contact rod, with the contact rod facing the pressure sensor. The pressure sensor is electrically connected to the controller.
[0012] Preferably, a return spring is sleeved on the outer wall of the slide rod, and the inner wall of the sliding cavity and the outer wall of the spherical probe abut against the two ends of the return spring, respectively.
[0013] Preferably, a first electric push rod is fixedly installed inside the support cylinder, with its output end passing through one end of the support cylinder and fixedly connected to the outer wall of one end of the drill rod. The ends of the three guide rods away from the drill rod are all fixedly connected to the outer wall of one end of the support cylinder. The first electric push rod is electrically connected to the controller.
[0014] Preferably, the drive assembly includes a second electric push rod, a rotating ring, and two connecting rods. A mounting plate is fixedly provided on the outer wall of the first electric push rod, and the rotating ring is rotatably mounted on the mounting plate. The second electric push rod is hinged between the inner wall of the support cylinder and the outer wall of the rotating ring. Each connecting rod is hinged between the rotating ring and an arc-shaped baffle. Two clearance grooves for the connecting rods to rotate are provided on the outer wall of the support cylinder. The second electric push rod is electrically connected to the controller.
[0015] Preferably, two elastic telescopic rods are fixed between each arc-shaped baffle and the outer wall of the support cylinder.
[0016] Preferably, two bellows guards are fixed between each link and the inner wall of a clearance groove.
[0017] Preferably, an end plate is fixedly provided at the end of the support cylinder away from the drill rod, a wire is provided on the outer wall of the end plate, the controller is located at the end of the wire away from the end plate, a display screen is provided on the outer wall of the controller, and a pull rope is fixedly provided on the center outer wall of the end plate.
[0018] The beneficial effects of this utility model are:
[0019] This invention designs a detection mechanism, namely a support cylinder, a drill rod, and a testing component. It also designs a first electric push rod, which, when activated by a controller, drives the drill rod on the support cylinder and the testing component on the drill rod to extend and retract horizontally. This allows for the detection of rock pressure at different drilling depths, meeting the monitoring requirements of different types of rock masses, while improving monitoring accuracy and the flexibility of the device.
[0020] This invention features a support mechanism, consisting of a drive assembly and two arc-shaped baffles. The drive assembly can be activated by a controller, and in conjunction with four elastic telescopic rods, it can slowly extend and retract the two arc-shaped baffles. This supports the inner wall of the borehole located in the soft rock layer, preventing the soft rock layer inside the borehole from collapsing and making the device unremovable after the inspection work is completed, thus avoiding economic losses.
[0021] This invention, through the design of wires, controller, and display screen, enables the detected electrical signal to be converted into a specific value of rockburst through the signal conversion module designed inside the controller and displayed on the display screen in real time. This allows monitoring personnel to conveniently obtain real-time information on the monitoring status of rockburst and improves the practicality of the device.
[0022] This invention designs a testing component, namely a spherical probe, a sliding rod, a contact rod, and a pressure sensor. When rockburst occurs, the rock at the end of the borehole will resist the spherical probe. Since the spherical probe and the contact rod are fixedly connected to both ends of the sliding rod, and the sliding rod is slidably connected to the sliding cavity, the sliding rod drives the contact head to slide inside the sliding hole towards the pressure sensor. When the contact rod presses the pressure sensor, the pressure sensor sends an electrical signal to the controller. The signal conversion module designed inside the controller converts the detected electrical signal into a specific value of rockburst. The response speed is fast, the detection time is short, and the detection value can be displayed in real time, thereby improving the monitoring efficiency of rockburst. Attached Figure Description
[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below.
[0024] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0025] Figure 2 This is a schematic diagram of the cross-sectional structure of the support cylinder of this utility model;
[0026] Figure 3 for Figure 2 A sectional view along line AA.
[0027] Figure 4 for Figure 3 Enlarged view of point B in the image;
[0028] Figure 5 This is a planar sectional view of the drill rod of this utility model;
[0029] Figure 6 for Figure 5 Enlarged view of point C in the image
[0030] Figure 7This is a schematic diagram of the cross-sectional structure of the elastic telescopic rod of this utility model;
[0031] In the diagram: Controller 1, Support cylinder 2, Drill rod 3, Guide rod 4, Arc-shaped baffle 5, Spherical probe 6, Slide rod 7, Contact rod 8, Pressure sensor 9, Sliding cavity 10, Sliding hole 11, Return spring 12, First electric push rod 13, Second electric push rod 14, Rotary ring 15, Connecting rod 16, Elastic telescopic rod 17, Bellows cover 18, Mounting plate 19, End plate 20, Wire 21, Display screen 22, Pull rope 23. Detailed Implementation
[0032] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0033] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product.
[0034] Reference Figures 1 to 7 As shown, a rockburst monitoring device includes a controller 1, a support mechanism, and a detection mechanism;
[0035] The testing mechanism includes a support cylinder 2, a drill rod 3, and a testing component. The support cylinder 2 is horizontally positioned. The drill rod 3 is slidably mounted on the outer wall of one end of the support cylinder 2 via three guide rods 4. The testing component is located at the end of the drill rod 3 away from the support cylinder 2.
[0036] The support mechanism is located on the outer wall of the support cylinder 2. The support mechanism includes a drive assembly and two arc-shaped baffles 5. The two arc-shaped baffles 5 are symmetrically arranged on the outer wall of the support cylinder 2. The drive assembly is located on the support cylinder 2. The test assembly and the drive assembly are electrically connected to the controller 1.
[0037] Reference Figure 1 , Figure 5 and Figure 6As shown, the test assembly includes a spherical probe 6, a sliding rod 7, a contact rod 8, and a pressure sensor 9. A sliding cavity 10 is provided at the end of the drill rod 3 furthest from the support cylinder 2. The sliding rod 7 is slidably disposed inside the sliding cavity 10. The spherical probe 6 and the contact rod 8 are respectively fixed at both ends of the sliding rod 7. A sliding hole 11 is provided at the end of the drill rod 3 furthest from the support cylinder 2 for the contact rod 8 to slide. The pressure sensor 9 is fixed at the end of the sliding hole 11 furthest from the contact rod 8. The contact rod 8 faces the pressure sensor 9. The pressure sensor 9 is electrically connected to the controller 1. When monitoring rockburst pressure in the rock mass surrounding a coal mine roadway is required, a hole is first drilled in the roof or sides of the roadway using a drilling rig. After drilling, the drill rod 3 is inserted horizontally into the borehole, and the spherical probe 6 is kept in contact with the rock mass at the end of the borehole. When the impact pressure is generated, the rock mass at the end of the borehole will resist the spherical probe 6. Since the spherical probe 6 and the contact rod 8 are fixedly connected to the two ends of the slide rod 7, and the slide rod 7 is slidably connected to the sliding cavity 10, the slide rod 7 drives the contact head to slide towards the end of the pressure sensor 9 inside the sliding hole 11. When the contact rod 8 presses the pressure sensor, the pressure sensor sends an electrical signal to the controller. The signal conversion module designed inside the controller converts the detected electrical signal into a specific value of the impact pressure.
[0038] Reference Figure 5 As shown, a return spring 12 is sleeved on the outer wall of the slide rod 7. The inner wall of the sliding cavity 10 and the outer wall of the spherical probe 6 respectively abut against the two ends of the return spring 12. When the spherical probe 6 is subjected to the impact of rock mass, the return spring 12 changes from its initial state to a taut state because the inner wall of the sliding cavity 10 and the outer wall of the spherical probe 6 abut against the two ends of the return spring 12. This serves as a buffer to protect the spherical probe 6. At the same time, when the impact of rock mass disappears, the rock mass no longer vibrates and abuts the spherical probe 6. Then, the return spring 12 drives the contact rod 8 to reset so that the contact rod 8 can perform the next impact of rock mass detection.
[0039] Reference Figure 3As shown, a first electric push rod 13 is fixedly installed inside the support cylinder 2. Its output end passes through one end of the support cylinder 2 and is fixedly connected to the outer wall of one end of the drill rod 3. The ends of the three guide rods 4 away from the drill rod 3 are all fixedly connected to the outer wall of one end of the support cylinder 2. The first electric push rod 13 is electrically connected to the controller 1. For soft rock layers, such as mudstone, shale and weathered granite, the required drilling depth is relatively shallow, which can effectively detect the rock pressure at these rock layers. However, when encountering rock pressure detection requirements in medium-hard rock layers such as sandstone, limestone and weak metamorphic rocks, the required drilling depth also increases. Therefore, when encountering rock pressure detection in rock layers with a deeper drilling depth, the controller 1 starts the first electric push rod 13, so that its output end drives the drill rod 3 to push towards the end away from the support cylinder 2. The three guide rods 4 play a guiding role, which can ensure that the drill rod 3 is pushed forward horizontally.
[0040] Reference Figure 3 and Figure 4 As shown, the drive assembly includes a second electric push rod 14, a rotating ring 15, and two connecting rods 16. A mounting plate 19 is fixedly mounted on the outer wall of the first electric push rod 13. The rotating ring 15 is rotatably mounted on the mounting plate 19. The second electric push rod 14 is hinged between the inner wall of the support cylinder 2 and the outer wall of the rotating ring 15. Each connecting rod 16 is hinged between the rotating ring 15 and an arc-shaped baffle 5. Two clearance grooves for the connecting rods 16 to rotate are provided on the outer wall of the support cylinder 2. The second electric push rod 14 is electrically connected to the controller 1. Due to the low hardness of the soft rock layer, the rock layer at the borehole opening is relatively loose, making the borehole opening prone to collapse. After collapse, the device is squeezed by the rock layer and difficult to remove, thus causing… To mitigate economic losses, during impact pressure testing of boreholes in weak rock formations, the controller 1 activates the second electric push rod 14, causing its output end to retract. Since the first electric push rod 13 is fixedly designed inside the support cylinder 2, the mounting plate 19 is fixedly connected to the first electric push rod 13, and the rotating ring 15 is rotatably connected to the mounting plate 19. The inner wall of the support cylinder 2 and the outer wall of the rotating ring 15 are respectively hinged to the two ends of the second electric push rod 14. Under the guidance of the four elastic telescopic rods 17, the two arc-shaped baffles 5 move away from each other, thus supporting the inner wall of the borehole and preventing the collapse of the rock strata inside the borehole opening, which would prevent the device from being removed after the testing work is completed, thus avoiding economic losses.
[0041] Reference Figure 1 and Figure 7 As shown, each arc-shaped baffle 5 is fixedly provided with two elastic telescopic rods 17 between it and the outer wall of the support cylinder 2. The two elastic telescopic rods 17 can ensure that the arc-shaped baffle 5 extends and retracts slowly, and will not collapse the rock layer at the borehole opening due to excessive extension and retraction speed, thus protecting the rock layer.
[0042] Reference Figure 2 and Figure 4As shown, each connecting rod 16 is fixed with two bellows guards 18 between it and the inner wall of a clearance groove. The two bellows guards 18 cooperate to ensure that the clearance groove is blocked when the connecting rod 16 rotates and resets, thereby preventing rocks in the borehole from falling into the support cylinder 2 and causing blockage or even damage to its internal components, thus protecting the device.
[0043] Reference Figure 1 and Figure 3 As shown, an end plate 20 is fixedly provided at the end of the support cylinder 2 away from the drill rod 3. A wire 21 is provided on the outer wall of the end plate 20. The controller 1 is located at the end of the wire 21 away from the end plate 20. A display screen 22 is provided on the outer wall of the controller 1. A pull rope 23 is fixedly provided on the outer wall of the center of the end plate 20. The wire 21 is mainly for facilitating the wiring of the first electric push rod 13, the second electric push rod 14, the pressure sensor 9 and the controller 1. The display screen 22 can display the specific value of the detected impact pressure in real time, so that the monitoring personnel can know the monitoring situation in real time. The pull rope 23 is convenient for pulling the drill rod 3 out of the borehole after the detection work is completed.
Claims
1. A rockburst monitoring device, characterized by: Including controller (1), support mechanism and detection mechanism, The detection mechanism includes a support cylinder (2), a drill rod (3) and a test assembly. The support cylinder (2) is horizontally arranged. The drill rod (3) is slidably arranged on the outer wall of one end of the support cylinder (2) through three guide rods (4). The test assembly is arranged at the end of the drill rod (3) away from the support cylinder (2). The support mechanism is arranged on the outer wall of the support cylinder (2). The support mechanism includes a driving assembly and two arc-shaped baffles (5). The two arc-shaped baffles (5) are symmetrically arranged on the outer wall of the support cylinder (2). The driving assembly is arranged on the support cylinder (2). The test assembly and the driving assembly are electrically connected with the controller (1).
2. The rock burst monitoring device of claim 1, wherein: The test assembly includes a spherical probe head (6), a sliding rod (7), a contact rod (8) and a pressure sensor (9). The end of the drill rod (3) away from the support cylinder (2) is provided with a sliding cavity (10). The sliding rod (7) is slidably arranged in the sliding cavity (10). The spherical probe head (6) and the contact rod (8) are fixedly arranged at the two ends of the sliding rod (7), respectively. The end of the drill rod (3) away from the support cylinder (2) is provided with a sliding hole (11) for the contact rod (8) to slide. The pressure sensor (9) is fixedly arranged at the inner end of the sliding hole (11) away from the contact rod (8). The contact rod (8) faces the pressure sensor (9). The pressure sensor (9) is electrically connected with the controller (1).
3. The rock burst monitoring device of claim 2, wherein: A reset spring (12) is sleeved on the outer wall of the sliding rod (7). The inner wall of the sliding cavity (10) and the outer wall of the spherical probe head (6) abut against the two ends of the reset spring (12), respectively.
4. The rock burst monitoring device of claim 3, wherein: A first electric push rod (13) is fixedly arranged in the support cylinder (2). The output end of the first electric push rod (13) penetrates through one end of the support cylinder (2) and is fixedly connected with the outer wall of one end of the drill rod (3). The three guide rods (4) are fixedly connected with the outer wall of one end of the support cylinder (2) away from the drill rod (3). The first electric push rod (13) is electrically connected with the controller (1).
5. The rock burst monitoring device of claim 4, wherein: The driving assembly includes a second electric push rod (14), a rotating ring (15) and two connecting rods (16). An installation plate (19) is fixedly arranged on the outer wall of the first electric push rod (13). The rotating ring (15) is rotatably arranged on the installation plate (19). The second electric push rod (14) is hingedly arranged between the inner wall of the support cylinder (2) and the outer wall of the rotating ring (15). Each connecting rod (16) is hingedly arranged between the rotating ring (15) and one arc-shaped baffle (5). Two avoiding grooves are arranged on the outer wall of the support cylinder (2) for the rotation of the connecting rods (16). The second electric push rod (14) is electrically connected with the controller (1).
6. The rock burst monitoring device of claim 5, wherein: Two elastic telescopic rods (17) are fixedly arranged between each arc-shaped baffle (5) and the outer wall of the support cylinder (2).
7. The rock burst monitoring device of claim 6, wherein: Two organ protection covers (18) are fixedly arranged between each connecting rod (16) and the inner wall of one avoiding groove.
8. The rock burst monitoring device of claim 7, wherein: An end plate (20) is fixedly arranged at the end of the support cylinder (2) away from the drill rod (3). A wire (21) is arranged on the outer wall of the end plate (20). The controller (1) is arranged at the end of the wire (21) away from the end plate (20). A display screen (22) is arranged on the outer wall of the controller (1). A pull rope (23) is fixedly arranged on the central outer wall of the end plate (20).