Coal mine roof multi-point displacement monitoring system

Abstract

The utility model discloses a coal mine roof multi-point displacement monitoring system, which comprises a plurality of sections of measuring rods and a data collector arranged at the tail ends of the plurality of sections of measuring rods, and is characterized in that a vertical displacement detection device and a horizontal displacement detection device are arranged in each section of the plurality of sections of measuring rods; the vertical displacement detection device and the horizontal displacement detection device are electrically connected with the first end of the transmitter, and the second end of the transmitter is electrically connected with the data collector through a cable. According to the monitoring system, the number of drilled holes for measuring holes is reduced, and the accuracy of displacement in the axial direction and the radial direction is improved. A connecting part of the rod body adopts a rocker connecting sleeve structure, a soft protective tube is adopted outside to protect a rocker resistor inside the connecting part, stretching and excessive bending are prevented, and the connecting part is convenient to disassemble and assemble, easy to carry and capable of being quickly assembled and used.

Description

Technical Field

[0001] The present application relates to the technical field of coal mine roof monitoring, and in particular to a coal mine roof multi-point displacement monitoring system. Background Art

[0002] Coal, my country's primary energy source, is experiencing a continuous increase in production. As mining depths increase, the difficulty of supporting coal mine roadways also increases. According to coal mine accident statistics, 2,536 roof collapse accidents occurred, accounting for 44.41% of all coal mine accidents. Coal mine roof collapse accidents are caused by a combination of factors. Roof collapse monitoring and surveillance can help identify potential hazards and implement countermeasures in a timely manner, making it a key tool for managing and preventing roof collapse accidents.

[0003] Currently, anchor-net cable support is the primary form of support for underground coal mine roadways. Roof collapse in anchor-net supported roadways is often sudden and catastrophic. Routine monitoring of the roof in anchor-net supported roadways and timely action when anomalies occur are key to reducing roof collapse accidents. However, coal mine monitoring of roadway roof deformation suffers from inaccuracy, a limited number of single-hole measurement points, and a lack of horizontal displacement monitoring, resulting in a lack of scientific basis for support design.

[0004] Therefore, how to achieve accurate monitoring of coal mine roofs is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] In order to solve the above technical problems, this application proposes the following technical solutions:

[0006] In the first aspect, an embodiment of the present application provides a multi-point displacement monitoring system for a coal mine roof, comprising: a multi-section measuring rod, and a data collector arranged at the end of the multi-section measuring rod, each section of the multi-section measuring rod is provided with a vertical displacement detection device and a horizontal displacement detection device, the vertical displacement detection device and the horizontal displacement detection device are respectively electrically connected to the first end of the transmitter, and the second end of the transmitter is electrically connected to the data collector through a cable.

[0007] In a possible implementation, each section of the multi-section measuring rod is connected via a rocker connecting sleeve.

[0008] In one possible implementation, the first end of the vertical displacement detection device is connected to an anchor claw, and the measuring rod is fixed in the top plate drilled hole through the anchor claw. The second end of the vertical displacement detection device is connected to the first end of the horizontal displacement detection device, and the second end of the horizontal displacement detection device is connected to the anchor claw of the adjacent measuring rod through the rocker connecting sleeve.

[0009] In one possible implementation, the vertical displacement detection device includes: a sliding rod provided at the end of the anchor claw, a brush provided at the end of the sliding rod, the brush being slidably connected to a resistor, the resistor being provided in a box body, and the box body being connected to the horizontal displacement detection device.

[0010] In a possible implementation, the horizontal displacement detection device includes: a rocker resistor disposed at the bottom of the box body, the rocker resistor being electrically connected to the transmitter via a signal line, and the rocker resistor being disposed in a soft protective tube.

[0011] In a possible implementation, the coal mine roof multi-point displacement monitoring system further includes a collection substation, wherein the first signal end of the collection substation is wirelessly connected to the data collector, and the second signal end of the collection substation is electrically connected to the ground control room.

[0012] In a possible implementation, a battery is provided in the data collector for powering the monitoring system.

[0013] In a possible implementation, the coal mine roof multi-point displacement monitoring system further includes a handheld reader, which is used to read the inspection data of the data collector through wireless signals.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The monitoring system of the utility model reduces the number of holes to be drilled for measuring holes and also improves the accuracy of displacement in both axial and radial directions.

[0016] The rod connection components of this utility model utilize a rocker sleeve structure, with a soft protective tube protecting the internal rocker resistor to prevent stretching and excessive bending. The rod is easy to disassemble and assemble, portable, and can be quickly assembled and used underground. Furthermore, the use of an expanding shell anchor claw structure securely secures each rod section, preventing slippage caused by drill hole deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a coal mine roof multi-point displacement monitoring system provided in an embodiment of the present application;

[0018] Figure 2 A schematic structural diagram of a vertical displacement detection device provided in an embodiment of the present application;

[0019] Figure 3 A schematic structural diagram of a horizontal displacement detection device provided in an embodiment of the present application;

[0020] Figure 4 This is an installation location diagram of the coal mine roof multi-point displacement monitoring system provided in an embodiment of the present application.

[0021] in, Figure 1-4 The symbols in the figure are: 1-measuring rod, 2-data collector, 3-handheld readout instrument, 4-collection substation, 5-ground control room, 6-anchor claw, 7-vertical displacement detection device, 8-horizontal displacement detection device, 9-cable, 10-sliding rod, 11-brush, 12-resistance sheet, 13-rocker resistor, 14-rocker connecting sleeve, 15-soft protective tube. DETAILED DESCRIPTION

[0022] The present solution will be described below with reference to the accompanying drawings and specific implementation methods.

[0023] Figure 1 The structural diagram of the coal mine roof multi-point displacement monitoring system provided in the embodiment of the present application is shown in FIG. Figure 1 The multi-point displacement monitoring system for the coal mine roof in this embodiment includes: a multi-section measuring rod 1, and a data collector 2 arranged at the end of the multi-section measuring rod 1. Each section of the multi-section measuring rod 1 is provided with a vertical displacement detection device 7 and a horizontal displacement detection device 8. The vertical displacement detection device 7 and the horizontal displacement detection device 8 are respectively electrically connected to the first end of the transmitter, and the second end of the transmitter is electrically connected to the data collector 2 through a cable 9.

[0024] In this embodiment, each section of a multi-section measuring rod 1 is connected by a rocker connector. Rocker resistors are used to tilt the rod 1 in any direction. This allows for multi-point horizontal and vertical displacement measurement. The rod is 10 meters long and consists of 10 sections (the number of sections can be increased or decreased depending on the roof conditions, with each section representing a measuring point). Generally, a greater number of sections results in more accurate measurements of the locations of horizontal and vertical displacement within the borehole.

[0025] See further Figure 1 The first end of a vertical displacement detection device 7 is connected to an anchor 6, which secures the measuring rod 1 in the top plate borehole. The second end of the vertical displacement detection device 7 is connected to the first end of a horizontal displacement detection device 8. The second end of the horizontal displacement detection device 8 is connected to the anchor 6 of an adjacent measuring rod 1 via a rocker connecting sleeve. When the rock formation shifts vertically, the vertical displacement detection device extends and outputs a vertical displacement data signal. When the rock formation shifts horizontally, the measuring rod tilts, and the horizontal displacement detection device outputs a data signal.

[0026] See also Figure 2In this embodiment, the vertical displacement detection device 7 includes a slide rod 10 mounted at the end of the anchor claw 6. A brush 11 is mounted at the end of the slide rod 10. Brush 11 is slidably connected to a resistor 12, which is housed within a housing connected to the horizontal displacement detection device 8. When the measuring rod 1 is extended, the slide rod 10 drives the brush 11 to slide across the resistor 12 within the detection device, causing a change in resistance and outputting a corresponding voltage. A transmitter collects this voltage and converts it into a digital signal.

[0027] See also Figure 3 In this embodiment, the horizontal displacement detection device 8 includes a rocker resistor 13 disposed at the bottom of the housing. Rocker resistor 13 is electrically connected to the transmitter via a signal line. Rocker resistor 13 is housed within a soft protective tube 15. The soft protective tube 15 provides waterproofing and protection. When the rod tilts, the rocker swings, causing the resistance of the two internal resistors (x and y) in rocker resistor 13 to change.

[0028] In addition, the coal mine roof multi-point displacement monitoring system in the embodiment of the present application also includes a data acquisition substation 4 and a handheld reader 3. The first signal terminal of the data acquisition substation 4 is wirelessly connected to the data collector 2, and the second signal terminal of the data acquisition substation 4 is electrically connected to the ground control room 5. The collected inspection data is output through the communication port and transmitted to the ground control room via a connection to the coal mine monitoring system. The handheld reader 3 is used to read the inspection data from the data collector 2 via a wireless signal.

[0029] In this embodiment, data collector 2 is in a power-saving dormant state most of the time. Data transmission only begins after the handheld reader 3 awakens both the device and data collector 2. Data collector 2, which contains sealed components such as a data transmitter, a transducer, and a battery, is responsible for providing power to the detection device and transducer within the measuring rod 1, collecting and storing data from the detection device and transducer within the measuring rod, and wirelessly transmitting the collected data to the handheld reader 3.

[0030] See also Figure 4 In this embodiment, the measuring rod is installed in a specified direction in the tunnel. The coordinate X-axis is parallel to the tunnel direction, and the Y-axis is perpendicular to the tunnel direction. The measurement result reflects the direction of horizontal displacement.

[0031] In the embodiment of the present invention, "at least one" refers to one or more, and "more" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. Among them, A and B can be singular or plural. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can be represented by: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0033] The above description is merely a specific embodiment of the present invention. Any modifications or substitutions that can be readily conceived by a person skilled in the art within the technical scope disclosed in the present invention are intended to be covered by the scope of protection of the present invention. The scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A coal mine roof multi-point displacement monitoring system, characterized in that: include: A multi-section measuring rod and a data collector arranged at the end of the multi-section measuring rod, each section of the multi-section measuring rod is provided with a vertical displacement detection device and a horizontal displacement detection device, the vertical displacement detection device and the horizontal displacement detection device are respectively electrically connected to the first end of the transmitter, and the second end of the transmitter is electrically connected to the data collector via a cable.

2. The coal mine roof multi-point displacement monitoring system according to claim 1, characterized in that: include: Each section of the multi-section measuring rod is connected by a rocker connecting sleeve.

3. The coal mine roof multi-point displacement monitoring system according to claim 2, characterized in that: include: The first end of the vertical displacement detection device is connected to an anchor claw, and the measuring rod is fixed in the top plate drilled hole through the anchor claw. The second end of the vertical displacement detection device is connected to the first end of the horizontal displacement detection device, and the second end of the horizontal displacement detection device is connected to the anchor claw of the adjacent measuring rod through the rocker connecting sleeve.

4. The coal mine roof multi-point displacement monitoring system according to claim 3, characterized in that: include: The vertical displacement detection device includes a slide rod provided at the end of the anchor claw, a brush provided at the end of the slide rod, the brush being slidably connected to a resistor, the resistor being provided in a box body, and the box body being connected to the horizontal displacement detection device.

5. The coal mine roof multi-point displacement monitoring system according to claim 4, characterized in that: The horizontal displacement detection device includes: a rocker resistor arranged at the bottom of the box body, the rocker resistor is electrically connected to the transmitter through a signal line, and the rocker resistor is arranged in a soft protective tube.

6. The coal mine roof multi-point displacement monitoring system according to claim 1, characterized in that: It also includes a collection substation, a first signal end of the collection substation is wirelessly connected to the data collector, and a second signal end of the collection substation is electrically connected to a ground control room.

7. The coal mine roof multi-point displacement monitoring system according to claim 6, characterized in that: The data collector is provided with a battery for supplying power to the monitoring system.

8. The coal mine roof multi-point displacement monitoring system according to claim 1, characterized in that: It also includes a handheld reader, which is used to read the inspection data of the data collector through wireless signals.

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