Coal mine pressure data joint monitoring system

Abstract

The utility model discloses a coal mine pressure data combined monitoring system. Comprising a multi-point displacement meter installed in a coal mine tunnel top plate in a drilling mode, an anchor rod dynamometer installed on an anchoring part of the coal mine tunnel top plate or / and a tunnel side wall, laser displacement meters fixedly installed on the two sides of a coal mine tunnel bottom plate or / and the tunnel side wall, and a drilling stress meter installed in the coal mine tunnel side wall in a drilling mode. The multipoint displacement meter, the anchor rod dynamometer, the laser displacement meter and the borehole stress meter are respectively in communication connection with the data acquisition instrument, the data acquisition instrument is in communication connection with the underground monitoring information processor, and the underground monitoring information processor is in communication connection with the ground monitoring server. According to the utility model, the integrated monitoring of various mine pressure data of the coal mine tunnel is realized, the coal mine safety production is guided, the system is suitable for coal mine tunnel monitoring under different geological conditions, the data processing cost of coal mine safety monitoring is reduced, accidents caused by coal mine rock burst disasters are reduced, and the underground coal mine safety production is guaranteed.

Description

Technical Field

[0001] The utility model relates to a coal mine pressure data joint monitoring system, belonging to the field of underground coal mine safety monitoring. Background Art

[0002] Rock burst is a dynamic disaster caused by the sudden release of elastic deformation energy inside the rock mass. Rock burst disasters occur suddenly, are highly harmful, and are severely destructive. There are many influencing factors. Although my country has been conducting research on rock burst for more than 40 years, it is still difficult to predict and control. One of the important reasons is the lack of more comprehensive and accurate mine pressure monitoring data for scientific research and guidance of coal mine safety production.

[0003] Many scholars at home and abroad have done a lot of research on the analysis and prediction of the law of mine pressure manifestation in coal mining working faces, mainly including hierarchical prediction of mine pressure manifestation law, mine pressure prediction based on machine learning methods, mine pressure manifestation law analysis based on time series analysis, and mine pressure prediction based on deep learning, such as the mine pressure early warning tree system based on deep learning time series prediction and multi-dimensional dynamic inspection disclosed in the Chinese patent application with application number CN202311043309.4. This type of research work requires a large amount of accurate and comprehensive mine pressure data of various types for the analysis and prediction of mine pressure. Under the situation of intelligent coal mines, the monitoring of mine pressure must also be intelligent. At present, the structural and mechanical monitoring of coal mining working faces are carried out through independent monitoring sensors. This classified monitoring method has cumbersome sensor wiring, and requires data processing of various types of monitoring data separately, and the monitoring cost is high. Utility Model Content

[0004] The technical problem solved by the utility model is: in view of the fact that the existing underground coal mine safety monitoring technology lacks a system capable of uniformly obtaining various underground coal mine pressure monitoring data, a coal mine pressure data joint monitoring system is provided.

[0005] The utility model is implemented by the following technical solutions:

[0006] A coal mine pressure data joint monitoring system, comprising:

[0007] A multi-point displacement meter for monitoring the delamination of the roof of a coal mine tunnel, wherein the multi-point displacement meter is drilled and installed in the roof of the coal mine tunnel;

[0008] An anchor dynamometer for monitoring the working condition of anchors in coal mine tunnels, wherein the anchor dynamometer is installed on the anchors of the roof of the coal mine tunnel and / or the side walls of the tunnel;

[0009] A laser displacement meter used to monitor the displacement of the side walls of a coal mine roadway or the sinking of the roadway roof, wherein the laser displacement meter is fixedly installed on both sides of the bottom plate of the coal mine roadway and / or on the side walls of the roadway;

[0010] A borehole stress gauge for monitoring borehole stress in a coal mine tunnel, wherein the borehole stress gauge is installed in a side wall of a coal mine tunnel;

[0011] The multi-point displacement meter, anchor dynamometer, laser displacement meter and drilling stress meter are respectively connected to the data acquisition instrument to convert the physical signals collected by the above sensors into analog electrical signals. The data acquisition instrument is connected to the downhole monitoring information processor to process the electrical signals transmitted by the data acquisition instrument. The downhole signal processor is connected to the ground monitoring server to receive, store and display the data transmitted by the downhole signal processor.

[0012] In a coal mine pressure data joint monitoring system of the utility model, specifically, the multi-point displacement meter includes a plurality of displacement sensors arranged in parallel in the same borehole, the displacement sensors are integrated in a protective cover of a mounting base, and embedded in the borehole mouth through the mounting base, each displacement sensor is respectively connected to a measuring rod extending into the borehole, the end of the measuring rod is provided with an anchor head inserted into the rock mass in the borehole for positioning, the measuring rods connected to different displacement sensors have different lengths, corresponding to the displacement data of different depths in the borehole, and the displacement sensor is communicatively connected to a data acquisition instrument.

[0013] In a coal mine pressure data joint monitoring system of the utility model, specifically, the anchor dynamometer includes a pressure sensor fixed on the end of an anchor extending out of the rock mass of the tunnel, a tray is sleeved on the anchor extending out of the rock mass of the tunnel, the pressure sensor is arranged on the anchor outside the tray, and the pressure sensor and the tray are pressed against the rock mass of the tunnel by a locking nut at the end of the anchor, and the pressure sensor is communicatively connected to a data acquisition instrument.

[0014] In a coal mine pressure data joint monitoring system of the utility model, specifically, the borehole stress gauge is fixedly embedded in a borehole on the side wall of a coal mine tunnel, and is connected to a multi-way valve outside the borehole through an oil pipe. One of the valve ports of the multi-way valve is unidirectionally connected to an oil injection gun, and the oil injection gun injects pressure oil into the borehole stress gauge through the multi-way valve and the oil pipe. The other valve port of the multi-way valve is unidirectionally connected to a pressure transmitter. The pressure change generated by the pressure oil inside the borehole stress gauge after being pressurized is transmitted to the pressure transmitter, and the pressure transmitter is communicatively connected to a data acquisition instrument.

[0015] In a coal mine pressure data joint monitoring system of the utility model, specifically, the laser displacement meter includes a laser transmitter, a laser receiver and a laser measuring instrument. The laser transmitter and the laser receiver are both fixed in the tunnel through a fixed support. The laser transmitter emits laser toward the side wall and / or the tunnel roof of the coal mine tunnel. The laser receiver receives the laser reflected from the side wall and / or the tunnel roof of the coal mine tunnel. The laser measuring instrument is respectively connected to the laser transmitter and the laser receiver and is communicated with the data acquisition instrument to obtain the distance signal of the laser reflection position and transmit it to the data acquisition instrument.

[0016] In a coal mine pressure data joint monitoring system of the utility model, specifically, the data acquisition instrument adopts an intrinsically safe power supply to power the underground monitoring equipment.

[0017] In a coal mine pressure data joint monitoring system of the utility model, specifically, communication connection is achieved between the data acquisition instrument and the underground monitoring information processor, and between the underground monitoring information processor and the ground monitoring server through signal lines or wireless transmission modules.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] (1) The utility model simultaneously monitors four types of mine pressure data in coal mine tunnels, namely, stress data of anchors (anchor rods / cables), displacement data of roof separation, stress data of side walls, and displacement data of side walls. It reasonably and flexibly adjusts the layout positions of multi-point displacement meters, anchor dynamometers, borehole stress meters, and laser displacement meters in the tunnels, and is easy to reasonably arrange in different tunnel conditions. It can adapt to coal mine tunnel monitoring under different mining conditions, so that the monitoring effect is better.

[0020] (2) The utility model collects the mine pressure data of the tunnel in a unified manner through a joint monitoring system formed by a multi-point displacement meter, an anchor dynamometer, a borehole stress meter and a laser displacement meter, processes and summarizes all monitoring signals through an underground monitoring information processor, and transmits the data to a ground monitoring server for storage and display.

[0021] (3) The overall structure of the joint monitoring system of the utility model is simpler than that of the prior art, and the layout of each sensor under different coal mine tunnel geological conditions can be flexibly adjusted, which is easy to operate in practice. Not only can the management personnel on the ground guide the safe production underground through the monitoring data, but also the early warning signals issued by the sensor data exceeding the threshold can be observed underground, and the stored summary data can also be used for further research on mine pressure.

[0022] To sum up, the coal mine pressure data joint monitoring system provided by the utility model realizes the integrated monitoring of various pressure data of coal mine tunnels, guides the safe production of coal mines, is suitable for monitoring coal mine tunnels in different geological conditions, reduces the data processing cost of coal mine safety monitoring, reduces accidents caused by coal mine impact ground pressure disasters, and ensures safe production in coal mines underground.

[0023] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the layout of the coal mine pressure data joint monitoring system in the coal mine tunnel of Example 1.

[0025] Figure 2 This is a schematic diagram of the connection of various modules of the coal mine pressure data joint monitoring system of Example 1.

[0026] Figure 3 Schematic diagram of the multi-point displacement meter in Example 1.

[0027] Figure 4 Schematic diagram of the anchor stress gauge in Example 1.

[0028] Figure 5 Schematic diagram of the laser displacement meter in Example 1.

[0029] Figure 6 Schematic diagram of the drilling stress gauge in Example 1.

[0030] Figure 7 This is a schematic diagram of the layout of the coal mine pressure data joint monitoring system in the coal mine tunnel of Example 2.

[0031] Figure 8 This is a schematic diagram of the layout of the coal mine pressure data joint monitoring system of Example 3 in a coal mine tunnel.

[0032] Fig. 9 This is a schematic diagram of the layout of the coal mine pressure data joint monitoring system of Example 4 in a coal mine tunnel.

[0033] Fig.10 This is a schematic diagram of the layout of the coal mine pressure data joint monitoring system of Example 5 in a coal mine tunnel.

[0034] Numbers in the figure: 1-underground monitoring equipment, 2-information processing center,

[0035] 101-tunnel side wall, 102-tunnel top plate, 103-tunnel bottom plate,

[0036] 110-first multi-point displacement meter, 110'-second multi-point displacement meter, 110"-third multi-point displacement meter, 111-anchor head, 112-measuring rod, 113-displacement sensor, 114-protective cover, 115-mounting base, 120-first anchor dynamometer, 120'-second anchor dynamometer, 121-anchor, 122-tray, 123-pressure sensor, 124-pressure ring, 125-locking nut, 130-first laser displacement meter, 130'-second laser displacement meter, 131-laser transmitter, 132-laser receiver, 133-laser measuring instrument, 134-fixed support, 140-first drilling stress meter, 140'-second drilling stress meter, 141-drilling, 142-oil pipe, 143-multi-way valve, 144-oil gun, 145-pressure transmitter;

[0037] 200-data acquisition instrument, 210-intrinsically safe power supply, 300-underground monitoring information processor, 400-ground monitoring server. DETAILED DESCRIPTION

[0038] Embodiment 1

[0039] See also Figure 1 and Figure 2The coal mine pressure data joint monitoring system set in the coal mine underground tunnel shown in the figure is a specific implementation scheme of the utility model, which specifically includes a first multi-point displacement meter 110, a first anchor dynamometer 120, a first laser displacement meter 130, a first borehole stress meter 140, a data acquisition instrument 200, an intrinsically safe power supply 210, an underground monitoring information processor 300, and a ground monitoring server 400. Among them, the first multi-point displacement meter 110, the first anchor dynamometer 120, the first laser displacement meter 130, the first borehole stress meter 140, the data acquisition instrument 200, and the intrinsically safe power supply 210 all belong to the underground monitoring equipment 1, and the underground monitoring equipment 1 is set in the underground tunnel of the coal mine to monitor and collect the pressure data of the underground tunnel of the coal mine. The underground monitoring information processor 300 and the ground monitoring server 400 belong to the information processing center 2, which receives the pressure data collected by the underground monitoring equipment 1 and processes, stores and displays them. Specifically in this embodiment, the first multi-point displacement meter 110, the first anchor dynamometer 120, the first laser displacement meter 130 and the first drilling stress meter 140 are respectively communicated with the data acquisition instrument 200, and the physical signal acquisition of the above sensors is converted into analog electrical signals. The data acquisition instrument 200 uses an intrinsically safe power supply 210 to power the downhole monitoring equipment. The data acquisition instrument 200 is communicated with the downhole monitoring information processor 300, and the downhole monitoring information processor 300 is placed in the duty room of the downhole mining area to process and integrate the electrical signals transmitted by the data acquisition instrument 200. The downhole signal processor 300 is then communicated with the ground monitoring server 400. The ground monitoring server 400 is set in the ground monitoring center of the ground industrial square of the coal mine, and is used to receive, store and display data transmitted by the downhole signal processor.

[0040] In specific implementation applications, wired communication connection or wireless communication connection is achieved between the data acquisition instrument 200 and the downhole monitoring information processor 300, and between the downhole monitoring information processor 300 and the ground monitoring server 400 through signal lines or wireless transmission modules. The transmission and processing of mine pressure signals belong to conventional technologies in the field. The above downhole monitoring information processors and ground monitoring servers can be selected from mature existing equipment in this field. This embodiment below describes in detail the multi-sensor installation scheme of the downhole monitoring equipment protected by the utility model.

[0041] The coal mine tunnel of this embodiment belongs to a conventional tunnel, in which a set of first multi-point displacement meters 110 are drilled and installed in the center of the coal mine tunnel roof 102 to monitor the delamination of the coal mine tunnel roof, track and monitor the delamination of the tunnel roof, and judge whether the anchor support parameters are reasonable and whether the roof is stable during the tunnel service by comparing the changes in the delamination of the roof rock layers inside and outside the anchoring range, so as to timely discover the signs of roof instability and reinforce it to avoid the occurrence of roof accidents. Figure 3The first multi-point displacement meter 110 is provided with a plurality of displacement sensors 113 in parallel in the same borehole, and the separation signal of the roof 102 of the coal mine tunnel is obtained by monitoring the plurality of displacement sensors at different measuring point depths in the same borehole. The plurality of displacement sensors 113 are integrated and arranged in a protective cover 114 of a mounting base 115, and are embedded in the borehole mouth through the mounting base 115. Each displacement sensor 113 is respectively connected to a measuring rod 112 extending into the borehole, and an anchor head 111 is provided at the end of the measuring rod 112 for inserting into the rock mass in the borehole for positioning. The measuring rods 112 connected to different displacement sensors 113 have different lengths, corresponding to the displacement data at different depths in the borehole. All displacement sensors 113 of the first multi-point displacement meter 110 are communicatively connected to the data acquisition instrument.

[0042] This embodiment also provides a set of first anchor dynamometers 120 to monitor the working condition of the coal mine tunnel roof anchor. The first anchor dynamometer 120 is installed on the anchor of the coal mine tunnel roof 102. Generally, the anchor in the coal mine tunnel can also be an anchor cable. During the construction of the coal mine tunnel roof, it is installed on the anchor or anchor cable when the anchor cable is tensioned or the anchor nut is tightened. Figure 4 The first anchor dynamometer 120 of the present embodiment includes a pressure sensor 123 fixed on the end of an anchor 121 extending out of the rock mass of the tunnel, a tray 122 is sleeved on the anchor 121 extending out of the rock mass of the tunnel, the pressure sensor 123 is arranged on the anchor 121 outside the tray 122, and a thread is processed on the end of the anchor 121, and the pressure sensor 123 and the tray 122 are pressed against the rock mass of the tunnel by screwing with a locking nut 125. The pressure sensor 123 of the first anchor dynamometer 120 is communicatively connected with a data acquisition instrument, and the pressure sensor 123 converts the pressure signal into an analog voltage signal. The data acquisition instrument reprocesses the voltage signal to actually measure the actual force on the anchor.

[0043] In this embodiment, a pressure ring 124 is further provided between the locking nut 125 and the pressure sensor 123. The tray 122 and the pressure ring 124 on both sides of the pressure sensor 124 enable the axial tensile pressure applied by the locking nut 125 to the anchor rod to act evenly on the pressure sensor 123, thereby improving the measurement accuracy of the anchor rod tension data and avoiding direct crushing of the pressure sensor.

[0044] The sleeve of the first anchor dynamometer 120 is composed of a full stainless steel cylinder and a pressure sensor; the pressure sensor is wrapped by a plastic inner core.

[0045] In this embodiment, a group of first laser displacement meters 130 are arranged on one side of the coal mine tunnel floor 103 to monitor the displacement of the tunnel side wall. Figure 5The first laser displacement meter 130 includes a laser transmitter 131, a laser receiver 132, a laser measuring instrument 133 and a fixed support 134. The laser transmitter 131 and the laser receiver 132 are fixed on one side of the tunnel floor 103 through the fixed support 134. The first laser displacement meter 130 is arranged on the side of the tunnel floor close to the side of the tunnel to monitor the displacement of the two sides of the tunnel. If there are obstacles blocking the arrangement of the laser displacement meter, the arrangement height position of the fixed support of the laser displacement meter can be adjusted upward as needed and fixed on the side of the tunnel to avoid obstacles on the tunnel floor.

[0046] The laser transmitter 131 transmits laser toward the side wall 101 of the other side of the coal mine roadway, and the laser receiver 132 receives the laser reflected from the side wall 101 of the roadway. The input end of the laser measuring instrument 133 is respectively connected to the laser transmitter 131 and the laser receiver 132 to calculate the real-time reflection distance from the laser light to the irradiated roadway side wall, and obtain the slight displacement change of the coal mine roadway side wall through the change of the reflection distance. The output end of the laser measuring instrument 133 is connected to the data acquisition instrument 200 to transmit the obtained roadway side wall distance signal to the data acquisition instrument 200.

[0047] In this embodiment, a group of first borehole stress gauges 140 are drilled in the side wall 101 of the roadway on one side of the coal mine to monitor the borehole stress of the coal mine roadway. Figure 6 The first borehole stress gauge 140 is fixedly embedded in the borehole 141 of the side wall of the coal mine tunnel, and is connected to the multi-way valve 143 outside the borehole through the oil pipe 142. The multi-way valve 143 of this embodiment has three valve ports. One of the valve ports of the multi-way valve 143 is unidirectionally connected to the oil injection gun 144, ensuring that the pressure oil can only be injected into the oil pipe 142 and the borehole stress gauge 140 through the oil injection gun 144. The other valve port of the multi-way valve 143 is unidirectionally connected to the pressure transmitter 145, ensuring that the pressure change generated by the pressure oil inside the borehole stress gauge 142 after receiving the rock pressure around the borehole can only be output and transmitted to the pressure transmitter 145 in one direction. The unidirectional connection control of the multi-way valve 143 can be achieved by setting a one-way valve at the valve port connecting the oil injection gun and the pressure transmitter. The pressure transmitter 145 is connected to the data acquisition instrument 200 for communication, and the pressure signal transmitted by the borehole stress gauge 142 is converted into an analog electrical signal for transmission.

[0048] The data acquisition instrument in this embodiment is a KJ307 intrinsically safe data acquisition instrument, which uses mature digital processing technology for data acquisition, transmission and processing of multi-point displacement meters, anchor dynamometers, laser displacement meters and drilling stress meters. This embodiment aims to explain in detail the detection position layout and hardware connection layout between each hardware module in the utility model, and the specific processing and transmission process of mine pressure data will not be elaborated here.

[0049] The underground monitoring device 1 in this embodiment usually only plays a monitoring role, and the display module will not trigger an alarm. When the data exceeding the set threshold is monitored, the coal mine display module will be automatically triggered to display the data as an early warning. Generally, various types of underground monitoring equipment are connected to the data acquisition instrument through a signal line, and the data acquisition instrument performs a preliminary summary of the data. The data acquisition instrument 200 is connected to the underground monitoring information processor 300 of the underground information center through a signal cable, and the underground monitoring information processor 300 processes and integrates the preliminary summarized data. The underground monitoring information processor 300 is connected to the ground monitoring server 400 of the ground monitoring center through a signal cable. The ground monitoring server 400 stores and displays the data transmitted by the underground information center. The management personnel on the ground can guide the underground safe production through the monitoring data, and the staff can also observe the early warning signal issued by the sensor data exceeding the threshold in the underground. The mine pressure monitoring data stored in the ground monitoring server 400 can also be used for further research related to mine pressure.

[0050] Embodiment 2

[0051] See also Figure 7 The coal mine pressure data joint monitoring system set in the coal mine underground tunnel shown in the figure is another specific implementation scheme of the utility model applied in general tunnels. In this embodiment, on the basis of the first embodiment, laser displacement meters are respectively set on the bottom plate 103 of the coal mine tunnel and the side wall 101 of the tunnel, wherein the first laser displacement meter 130 set on the bottom plate 103 of the tunnel emits laser toward the top plate 102 of the tunnel to measure the displacement of the top plate 102 of the tunnel, that is, the amount of sinking of the top plate of the tunnel, and the second laser displacement meter 130' set on the side wall 101 of the tunnel emits laser toward the other side of the tunnel to measure the displacement of the side wall of the tunnel, and the structure of the second laser displacement meter 130' is the same as that of the first laser displacement meter. In this embodiment, two groups of laser displacement meters are installed to monitor the sinking of the tunnel roof and the displacement between the side walls of the tunnel.

[0052] Embodiment 3

[0053] See also Figure 8 The coal mine pressure data joint monitoring system installed in the coal mine underground tunnel shown in the figure is a specific implementation scheme of the utility model in the coal mine tunnel where the pressure is relatively serious.

[0054] In the present embodiment, on the basis of a group of first multi-point displacement meters 110 disposed on the tunnel roof 102, a second multi-point displacement meter 110' and a third multi-point displacement meter 110" are respectively provided on the tunnel roof 102 on both sides of the first multi-point displacement meter 110, and the structures and arrangements of the second multi-point displacement meter 110' and the third multi-point displacement meter 110" are the same as those of the first multi-point displacement meter. In addition, for tunnel areas where it is known that the mine pressure is more serious, a first borehole stress meter 140 and a second borehole stress meter 140' are respectively provided on the tunnel side walls 101 on both sides of the tunnel to increase the surrounding rock stress monitoring of the rock mass on the tunnel side walls. The structure and arrangement of the second borehole stress meter 140' are the same as those of the first borehole stress meter 140.

[0055] Embodiment 4

[0056] See also Fig. 9 The coal mine pressure data joint monitoring system set up in the coal mine underground tunnel shown in the figure is another specific implementation scheme of the utility model in the coal mine tunnel where the pressure is relatively serious. In this embodiment, on the basis of the third embodiment, laser displacement meters are respectively set on the bottom plate 103 of the coal mine tunnel and the side wall 101 of the tunnel, wherein the first laser displacement meter 130 set on the bottom plate 103 of the tunnel emits laser toward the other side of the tunnel side wall to measure the displacement of the tunnel side wall, and the second laser displacement meter 130' set on the side wall 101 of the tunnel emits laser toward the top plate 102 of the tunnel to measure the displacement of the top plate 102 of the tunnel, that is, the subsidence of the top plate of the tunnel. In this embodiment, two groups of laser displacement meters are installed to realize comprehensive monitoring of the subsidence of the tunnel roof and the movement of the side walls on both sides of the tunnel.

[0057] Embodiment 5

[0058] See also Fig.10 The coal mine pressure data joint monitoring system installed in the coal mine underground tunnel shown in the figure is another specific implementation scheme of the utility model in the coal mine tunnel where the pressure is relatively serious. Anchors are arranged on the tunnel roof 102 and the tunnel side walls 101 on both sides of the tunnel in the coal mine tunnel of this embodiment.

[0059] In this embodiment, on the basis of setting a group of first multi-point displacement meters 110 on the tunnel roof 102, a second multi-point displacement meter 110' and a third multi-point displacement meter 110" are respectively provided on the tunnel roof 102 on both sides of the first multi-point displacement meter 110; then, two groups of first anchor dynamometers 120 are provided for the anchors of the tunnel roof 102, and for the anchors on the tunnel side walls 101, second anchor dynamometers 120' are further provided on the anchors of the tunnel side walls 101 on both sides. The structure and arrangement of the second anchor dynamometer 120' are the same as those of the first anchor dynamometer 120, so as to increase the working status monitoring of the anchors on the tunnel side walls.

[0060] In this document, the directions or positional relationships indicated by terms such as "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "vertical", and "horizontal" are based on the directions or positional relationships shown in the accompanying drawings and are only for the clarity of the technical solution and the convenience of description. Therefore, they should not be understood as limitations on the present invention.

[0061] In this document, the terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of elements other than those listed and may also include additional elements not expressly listed.

[0062] The above are only specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A coal mine pressure data joint monitoring system, characterized in that include: A multi-point displacement meter for monitoring the delamination of the roof of a coal mine tunnel, wherein the multi-point displacement meter is drilled and installed in the roof of the coal mine tunnel; An anchor dynamometer for monitoring the working condition of anchors in coal mine tunnels, wherein the anchor dynamometer is installed on the anchors of the roof of the coal mine tunnel and / or the side walls of the tunnel; A laser displacement meter used to monitor the displacement of the side walls of a coal mine roadway or the sinking of the roadway roof, wherein the laser displacement meter is fixedly installed on both sides of the bottom plate of the coal mine roadway and / or on the side walls of the roadway; A borehole stress gauge for monitoring borehole stress in a coal mine tunnel, wherein the borehole stress gauge is installed in a side wall of a coal mine tunnel; The multi-point displacement meter, anchor dynamometer, laser displacement meter and drilling stress meter are respectively connected to the data acquisition instrument for communication, and the physical signals collected by the above sensors are converted into analog electrical signals. The data acquisition instrument is connected to the downhole monitoring information processor for communication, and the electrical signals transmitted by the data acquisition instrument are processed. The downhole monitoring information processor is connected to the ground monitoring server for communication, and is used to receive, store and display the data transmitted by the downhole monitoring information processor.

2. A coal mine pressure data joint monitoring system according to claim 1, characterized in that: The multi-point displacement meter includes a plurality of displacement sensors arranged in parallel in the same borehole. The displacement sensors are integrated in a protective cover of a mounting base and embedded in the borehole mouth through the mounting base. Each displacement sensor is respectively connected to a measuring rod extending into the borehole. An anchor head is provided at the end of the measuring rod for inserting into the rock mass in the borehole for positioning. The measuring rods connected to different displacement sensors have different lengths, corresponding to displacement data at different depths in the borehole. The displacement sensor is communicatively connected to a data acquisition instrument.

3. A coal mine pressure data joint monitoring system according to claim 1, characterized in that: The anchor dynamometer includes a pressure sensor fixed on the end of an anchor extending out of the rock mass in the tunnel. A tray is sleeved on the anchor extending out of the rock mass in the tunnel. The pressure sensor is arranged on the anchor outside the tray, and the pressure sensor and the tray are pressed against the rock mass in the tunnel by a locking nut at the end of the anchor. The pressure sensor is communicatively connected to a data acquisition instrument.

4. A coal mine pressure data joint monitoring system according to claim 1, characterized in that: The borehole stress gauge is fixedly embedded in a borehole on the side wall of a coal mine tunnel, and is connected to a multi-way valve outside the borehole through an oil pipe. One of the valve ports of the multi-way valve is unidirectionally connected to an oil injection gun, and the oil injection gun injects pressure oil into the borehole stress gauge through the multi-way valve and the oil pipe. The other valve port of the multi-way valve is unidirectionally connected to a pressure transmitter. The pressure change generated by the pressure oil inside the borehole stress gauge being pressurized is transmitted to the pressure transmitter, and the pressure transmitter is communicatively connected to a data acquisition instrument.

5. A coal mine pressure data joint monitoring system according to claim 1, characterized in that: The laser displacement meter includes a laser transmitter, a laser receiver and a laser measuring instrument. The laser transmitter and the laser receiver are both fixed in the tunnel through a fixed support. The laser transmitter emits laser toward the side wall and / or the tunnel roof of the coal mine tunnel. The laser receiver receives the laser reflected from the side wall and / or the tunnel roof of the coal mine tunnel. The laser measuring instrument is respectively connected to the laser transmitter and the laser receiver and is in communication connection with the data acquisition instrument to obtain the distance signal of the laser reflection position and transmit it to the data acquisition instrument.

6. A coal mine pressure data joint monitoring system according to any one of claims 1 to 5, characterized in that: The data acquisition instrument uses an intrinsically safe power supply to power the underground monitoring equipment.

7. A coal mine pressure data joint monitoring system according to claim 6, characterized in that: The data acquisition instrument and the downhole monitoring information processor, and the downhole monitoring information processor and the ground monitoring server are connected in communication via signal lines or wireless transmission modules.

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