Monitoring and early warning system and method for rock burst of two advanced roadways of working face

Abstract

The invention discloses a rock burst monitoring and early warning system and method for two advanced roadways of a working face, and the system comprises a mounting pipe, an optical fiber, a data processing unit, an early warning unit and a display unit. The first end of the optical fiber extends into the mounting tube through the second end of the mounting tube and is connected with the first end of the mounting tube, and the second end of the optical fiber is arranged outside the mounting tube; the data processing unit is used for monitoring and processing strain data of the optical fiber, and when the advanced bearing pressure of the roadway roof exceeds a preset value, the early warning unit is used for displaying the early warning signal. According to the invention, the continuous monitoring of the advance bearing pressure of the roadway roof is realized, the integrity and accuracy of the monitoring data are improved, the overall pressure distribution information is provided, and the comprehensive understanding of the stress state of the roof is facilitated. The system can monitor the top plate pressure in real time and give out early warning immediately when the pressure exceeds a preset value, and the timeliness and accuracy of early warning are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of rock burst monitoring, and in particular to a rock burst monitoring and early warning system and method for two lanes ahead of a working face. Background Art

[0002] Rockburst is a typical hazard caused by sudden dynamic damage during deep mining due to high stress concentration in the coal and rock mass. As my country's coal mining depths increase year by year (some mines have already exceeded 1,500 meters in depth), the energy accumulation effect under hard roof conditions has significantly increased, leading to frequent rockburst accidents. According to statistics, approximately 70% of rockburst accidents occur in the first two lanes of the coal mining face (the transport lane and the return air lane). The main mechanism of the disaster is roof-type impact, that is, the hard and thick roof is difficult to break in time under the action of mining stress, resulting in the continuous accumulation and sudden release of elastic deformation energy, causing severe damage to the surrounding rock of the lane.

[0003] At present, the impact ground pressure methods in related technologies mainly include charge induction method, microseismic monitoring method, stress gauge monitoring method, etc., but these methods have certain limitations and cannot perform continuous overall measurement and early warning. Summary of the Invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention provides a system and method for monitoring and warning of rock bursts two lanes ahead of a working face.

[0006] The working face ahead two lanes impact ground pressure monitoring and early warning system of an embodiment of the present invention includes a mounting tube, an optical fiber, a data processing unit, an early warning unit and a display unit. A slurry hole is provided on the tube wall of the mounting tube. The first end of the mounting tube is used to extend into a drill hole provided on the tunnel roof. The second end of the mounting tube is used to be connected to a grouting machine so that the grouting machine can transport slurry into the mounting tube and the drill hole through the mounting tube; the first end of the optical fiber extends into the mounting tube through the second end of the mounting tube and is connected to the first end of the mounting tube, and the second end of the optical fiber is placed outside the mounting tube; the data processing unit is connected to the second end of the optical fiber and is used to monitor and process the strain data of the optical fiber to obtain the advance support pressure distribution information of the tunnel roof; the early warning unit is signal-connected to the data processing unit. When the advance support pressure of the tunnel roof exceeds a preset value, the early warning unit sends an early warning signal; the display unit is connected to the early warning unit and is used to display the early warning signal.

[0007] In some embodiments, there are multiple slurry holes, and the multiple slurry holes are divided into multiple hole groups. The multiple hole groups are arranged at intervals along the axial direction of the mounting tube, and each hole group includes multiple slurry holes arranged at intervals along the circumference of the mounting tube.

[0008] In some embodiments, the rock burst monitoring and early warning system for two lanes ahead of the working face of an embodiment of the present invention includes a connector, which is detachably inserted into the first end of the mounting tube, and the connector is connected to the optical fiber.

[0009] In some embodiments, the connector has a first perforation and a second perforation arranged at intervals along the radial direction of the mounting tube, and the first perforation and the second perforation both extend along the axial direction of the mounting tube. The first end of the optical fiber passes through the first perforation and then bends through the second perforation and is connected to the optical fiber.

[0010] In some embodiments, a blocker is provided at the second end of the mounting tube, and the blocker includes a first blocker and a second blocker. The first blocker and the second blocker are arranged on the outer peripheral surface of the mounting tube at intervals along the axial direction of the mounting tube, and are used to block the space between the mounting tube and the drill hole.

[0011] In some embodiments, a wire hole is provided on a wall of the mounting tube close to the second end, and the wire hole is used for the optical fiber to pass through.

[0012] In some embodiments, the working face ahead two tunnels impact ground pressure monitoring and early warning system of the embodiment of the present invention also includes a grouting adapter, the grouting adapter includes a connected large diameter section and a small diameter section, the outer diameter of the large diameter section is larger than the outer diameter of the small diameter section, the small diameter section is inserted into the second end of the mounting pipe, and the large diameter section is used to be connected to the grouting pipe of the grouting machine.

[0013] In some embodiments, the mounting tube is made of plastic.

[0014] The method for monitoring and early warning of rock burst pressure in the two lanes ahead of the working face according to an embodiment of the present invention is applied to the rock burst pressure monitoring and early warning system in the two lanes ahead of the working face according to the above embodiment, and includes:

[0015] S1. Arranging a plurality of drill holes inclined relative to a horizontal plane on the roof of a roadway ahead of the working face, wherein the plurality of drill holes are spaced apart along the length direction of the roadway;

[0016] S2. placing the optical fiber in the installation tube, and placing the installation tube in the drilled hole;

[0017] S3, using a grouting machine to fill the borehole and the installation pipe with slurry through the installation pipe and allowing the slurry to solidify;

[0018] S4, connecting the optical fiber to the information processing unit in series to monitor the strain data of the optical fiber, and using the data processing unit to perform inversion based on the strain data of the optical fiber to obtain the leading support pressure distribution of the working surface

[0019] S5. Compare the leading support pressure with a preset value. When the leading support pressure exceeds the preset value, the early warning unit sends a warning signal, and displays the warning signal through the display unit.

[0020] In some embodiments, the feature is that the angle between the axis of the borehole and the axial direction of the tunnel is 45°-60°.

[0021] Compared with traditional monitoring methods, the present invention realizes continuous monitoring of the advance support pressure of the tunnel roof through optical fiber sensors, thereby improving the integrity and accuracy of the monitoring data. The system can cover the monitoring of the two tunnels ahead of the entire working face, provide overall pressure distribution information, and help to fully understand the stress state of the roof. The system can monitor the roof pressure in real time and immediately issue an early warning when the pressure exceeds the preset value, thereby improving the timeliness and accuracy of the early warning. Through timely early warning, staff can quickly take measures to avoid or reduce the occurrence of rock burst accidents, thereby protecting the lives of mine workers. Compared with traditional monitoring methods, the optical fiber sensor used in the present invention has the advantages of high cost-effectiveness and easy maintenance. The application of the data processing unit enables the system to automatically process and analyze data, reducing the difficulty of manual intervention and improving the intelligence level of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 4 is an installation side view of the installation pipe according to the embodiment of the present invention.

[0023] Figure 2 4 is a front view of the installation of the installation pipe according to the embodiment of the present invention.

[0024] Figure 3 4 is a front view of the installation of the installation pipe according to the embodiment of the present invention.

[0025] Figure 4 yes Figure 3 Enlarged schematic diagram of part A.

[0026] Reference numerals:

[0027] 100, working face; 200, tunnel; 1, installation pipe; 101, slurry hole; 102, wire hole; 2, drilling hole; 3, optical fiber; 4, data processing unit; 5, early warning unit; 6, connector; 601, first perforation; 602, second perforation; 7, plug; 701, first plug; 702, second plug; 8, grouting adapter; 801, large diameter section; 802, small diameter section. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0029] The rock burst monitoring and early warning system for the two lanes ahead of the working face according to an embodiment of the present invention comprises a mounting tube 1, an optical fiber 3, a data processing unit 4, an early warning unit 5, and a display unit. The mounting tube 1 has a grouting hole 101 defined in its wall. The first end of the mounting tube 1 is configured to extend into a borehole 2 defined in the roof of a lane 200. The second end of the mounting tube 1 is configured to connect to a grouting machine, enabling the grouting machine to deliver slurry through the mounting tube 1 and into the borehole 2. The first end of the optical fiber 3 extends into the mounting tube 1 through the second end and connects to the first end of the mounting tube 1. The second end of the optical fiber 3 is positioned outside the mounting tube 1. The data processing unit 4 is connected to the second end of the optical fiber 3 and is configured to monitor and process strain data from the optical fiber 3 to obtain information on the distribution of the leading support pressure in the roof of the lane 200. The early warning unit 5 is signal-connected to the data processing unit 4 and issues an early warning signal when the leading support pressure in the roof of the lane 200 exceeds a preset value. The display unit 5 is connected to the early warning unit 5 and displays the early warning signal.

[0030] Optical fiber 3 is used to monitor the strain data of the roof of tunnel 200. When the roof is subjected to advance support pressure, the strain of optical fiber 3 changes. These changes are captured by the optical fiber 3 sensor and converted into electrical signals. Data processing unit 4 collects the strain data transmitted back by optical fiber 3 and, through analysis and processing, obtains information on the distribution of advance support pressure on the roof. Early warning unit 5 determines whether the roof pressure exceeds the safe range based on a preset threshold. If it does, early warning unit 5 immediately issues an early warning signal. The display unit visualizes these warning signals, allowing on-site personnel to take timely measures.

[0031] Compared with traditional monitoring methods, the present invention realizes continuous monitoring of the advance support pressure of the roadway 200 roof through the optical fiber 3 sensor, thereby improving the integrity and accuracy of the monitoring data. The system can cover the monitoring of the two lanes ahead of the entire working face 100, provide overall pressure distribution information, and help to fully understand the stress state of the roof. The system can monitor the roof pressure in real time and immediately issue an early warning when the pressure exceeds the preset value, thereby improving the timeliness and accuracy of the early warning. Through timely early warning, the staff can quickly take measures to avoid or reduce the occurrence of rock burst accidents, thereby protecting the lives of mine workers. Compared with traditional monitoring methods, the optical fiber 3 sensor adopted in the present invention has the advantages of high cost-effectiveness and easy maintenance. The application of the data processing unit 4 enables the system to automatically process and analyze data, reduces the difficulty of manual intervention, and improves the intelligence level of the system.

[0032] In some embodiments, there are multiple slurry holes 101, and the multiple slurry holes 101 are divided into multiple hole groups. The multiple hole groups are arranged at intervals along the axial direction of the mounting tube 1, and each hole group includes multiple slurry holes 101 arranged at intervals along the circumference of the mounting tube 1.

[0033] The axially and circumferentially spaced arrangement of multiple hole groups improves slurry diffusion efficiency, resulting in more uniform and efficient grouting. This evenly distributed slurry provides better support for the roof, reducing the risk of damage due to stress concentration. Precisely controlling the slurry flow rate within each hole group optimizes stress distribution within the roof of Tunnel 200, minimizing stress concentration and, consequently, the risk of rock bursts. This even distribution of slurry increases the accuracy of strain data collected by the fiber optic 3 sensor, facilitating precise monitoring of the roof's stress state.

[0034] In some embodiments, the rock burst monitoring and early warning system for two lanes ahead of the working face of the embodiment of the present invention includes a connector 6 , which is detachably inserted into the first end of the mounting tube 1 and is connected to the optical fiber 3 .

[0035] like Figure 3 and Figure 4 As shown, the connector 6 can be easily removed and installed from the first end of the mounting tube 1. This design facilitates the maintenance and replacement of the system and improves the maintainability and reliability of the system. When the optical fiber 3 sensor needs to be replaced or maintained, only the connector 6 needs to be removed without having to operate the entire mounting tube 1, which can save time and labor costs. The design of the connector 6 enables the system to adapt to different working environments and working conditions. Connectors 6 of different types or specifications can be replaced as needed, which improves the adaptability of the system. The detachable design of the connector 6 facilitates the transportation and storage of components such as the mounting tube 1 and the optical fiber 3, reducing the risk of damage during transportation. In a mine environment, the safety and reliability of the equipment are of paramount importance. The detachable connector 6 design can reduce potential safety risks caused by loose connections.

[0036] In some embodiments, the connector 6 has a first perforation 601 and a second perforation 602 arranged at intervals along the radial direction of the mounting tube 1. The first perforation 601 and the second perforation 602 both extend along the axial direction of the mounting tube 1. The first end of the optical fiber 3 passes through the first perforation 601 and then bends through the second perforation 602 and is connected to the optical fiber 3.

[0037] like Figure 4As shown, the first end of the optical fiber 3 first passes through the first perforation 601, then bends and passes through the second perforation 602. This path design allows the optical fiber 3 to form a certain bend within the connector 6, enhancing the fixation of the optical fiber 3 and reducing the risk of the optical fiber 3 falling due to vibration or impact. The bending design of the optical fiber 3 through the two perforations increases its fixation within the connector 6, preventing the optical fiber 3 from falling or being damaged due to vibration in the mining environment.

[0038] In some embodiments, a blocker 7 is provided at the second end of the mounting tube 1. The blocker 7 includes a first blocker 701 and a second blocker 702. The first blocker 701 and the second blocker 702 are arranged on the outer peripheral surface of the mounting tube 1 at intervals along the axial direction of the mounting tube 1 to block the space between the mounting tube 1 and the drill hole 2.

[0039] The design of the double sealer 7 can more effectively seal the space between the installation pipe 1 and the borehole 2, preventing slurry leakage and ensuring that the slurry can be accurately transported to the predetermined position. The presence of the sealer 7 increases the stability of the installation pipe 1 and prevents the installation pipe 1 from moving or deforming due to slurry pressure. The sealer 7 can prevent the slurry from entering unnecessary areas and avoid contamination of the monitoring system or other equipment. The double sealing design helps prevent the deterioration of the internal environment of the mine due to slurry leakage, thereby improving the safety of the mine. The sealer 7 can adapt to different slurry pressure conditions and maintain a good sealing effect even in high-pressure environments.

[0040] In some embodiments, a wire hole 102 is provided on the wall of the installation tube 1 near the second end, and the wire hole 102 is used for the optical fiber 3 to pass through.

[0041] The design of the wire hole 102 avoids direct contact between the optical fiber 3 and the grouting pipe, reducing potential interference of the slurry on the optical fiber 3, such as friction, blockage or damage. The optical fiber 3 can be better protected from the external forces that may be generated during the grouting process through the independent wire hole 102, thereby extending the service life of the optical fiber 3. The design of the wire hole 102 simplifies the installation process of the optical fiber 3, and the installer can more easily pass the optical fiber 3 through the hole and connect it to the corresponding equipment. By reducing the interference between the optical fiber 3 and the grouting pipe, the reliability of the entire monitoring system is improved, ensuring the accuracy and stability of the monitoring data. When maintaining the system or replacing the optical fiber 3, the design of the wire hole 102 makes this process more efficient and reduces the time and cost required for maintenance. The design of the wire hole 102 optimizes the space utilization inside the installation tube 1, so that the installation tube 1 can not only effectively transport the slurry, but also ensure the independent passage of the optical fiber 3.

[0042] In some embodiments, the working face ahead two tunnels impact ground pressure monitoring and early warning system of the embodiment of the present invention also includes a grouting adapter 8, the grouting adapter 8 includes a connected large diameter section 801 and a small diameter section 802, the outer diameter of the large diameter section 801 is larger than the outer diameter of the small diameter section 802, the small diameter section 802 is inserted into the second end of the mounting pipe 1, and the large diameter section 801 is used to be connected to the grouting pipe of the grouting machine.

[0043] The design of the large and small diameter sections of the grouting adapter 8 enables it to adapt to installation pipes 1 and grouting pipes of different diameters, improving the compatibility and flexibility of the system. By matching the large and small diameter sections, the grouting adapter 8 can provide a better sealing effect and prevent slurry leakage. The design of the grouting adapter 8 simplifies the connection process with the grouting machine, making installation and maintenance more convenient. The presence of the grouting adapter 8 increases the overall stability of the system and ensures that the monitoring system can operate normally during the grouting process.

[0044] In some embodiments, the mounting tube 1 is made of plastic.

[0045] The plastic material has good corrosion resistance and can resist corrosion from chemicals such as acids and alkalis that may exist in the mine environment, ensuring the stability and life of the installation pipe 1 during use. Plastic material is lighter than metal and other materials, which reduces the weight of the installation pipe 1, facilitates transportation and installation, and reduces the labor intensity of workers. The cost of plastic material is usually lower than that of metal and other materials. Using plastic to make the installation pipe 1 can reduce the overall cost of the system. Certain plastic materials have good wear resistance and can resist friction and wear that may occur in the mine environment. Plastic material has good insulation properties. For environments or equipment that require insulation, using a plastic installation pipe 1 is a suitable choice. Plastic material is easy to process and shape, and can be made into different shapes and sizes according to different design requirements.

[0046] The method for monitoring and warning of rock burst pressure two lanes ahead of the working face 100 according to an embodiment of the present invention is applied to the rock burst pressure monitoring and warning system two lanes ahead of the working face in the above embodiment, and includes:

[0047] S1. Arrange multiple boreholes 2 on the roof of the tunnel 200 ahead of the working face 100, which are inclined relative to the horizontal plane. The multiple boreholes 2 are spaced apart along the length direction of the tunnel 200.

[0048] S2, placing the optical fiber 3 in the installation tube 1, and placing the installation tube 1 in the drilled hole 2;

[0049] S3, using a grouting machine to fill the borehole 2 and the installation pipe 1 with slurry through the installation pipe 1 and allowing the slurry to solidify;

[0050] S4, connect the optical fiber 3 to the information processing unit in series to monitor the strain data of the optical fiber 3, and use the data processing unit 4 to perform inversion based on the strain data of the optical fiber 3 to obtain the leading support pressure distribution of the working surface 100

[0051] S5. Compare the leading support pressure with a preset value. When the preset value is exceeded, the early warning unit 5 sends out an early warning signal and displays the early warning signal through the display unit.

[0052] Arrange boreholes 2 (S1): Arrange multiple boreholes 2 at certain intervals on the roof of the tunnel 200 ahead of the working face 100. These boreholes 2 have a certain inclination angle relative to the horizontal plane to better cover the roof area of ​​the tunnel 200.

[0053] Installing the optical fiber 3 (S2): placing the optical fiber 3 in the installation tube 1, and then inserting the installation tube 1 into the drilled hole 2, ensuring that the optical fiber 3 can sense the change in the top plate pressure.

[0054] Filling and solidifying slurry (S3): A grouting machine is used to fill slurry into borehole 2 and mounting tube 1 through mounting tube 1 until the slurry completely fills borehole 2 and mounting tube 1. The slurry is then allowed to solidify. The solidified slurry protects optical fiber 3 and also transmits stress changes in the roof.

[0055] Monitoring and Data Processing (S4): Optical fiber 3 is connected to an information processing unit, which analyzes the stress state of the roof by monitoring the strain data of optical fiber 3. Data processing unit 4 uses the strain data of optical fiber 3 to perform inversion calculations to obtain the distribution of the leading support pressure of working face 100.

[0056] Early warning and display (S5): The monitored advanced support pressure is compared with a preset safety threshold. If it exceeds the preset value, the early warning unit 5 will issue an early warning signal and display the early warning information on the display unit to remind the staff to take appropriate safety measures.

[0057] Continuous stress monitoring can be achieved through the optical fiber 3 sensor, which improves the real-time and accuracy of monitoring. The overall distribution of the advance support pressure of the working face 100 can be obtained, which helps to fully understand the stress state of the roof. Through real-time monitoring and data analysis, the system can immediately issue an early warning when the pressure exceeds the safety threshold, providing timely safety information to the staff. The application of the early warning system can effectively prevent the occurrence of impact ground pressure accidents and ensure the safety of the lives of mine workers. The application of the data processing unit 4 enables the system to automatically process and analyze data, improving the intelligence level of the system. The system can adapt to different working environments and working conditions, providing flexibility and reliability.

[0058] In some embodiments, it is characterized in that the angle between the axis of the borehole 2 and the axial direction of the tunnel 200 is 45°-60°.

[0059] The tilt angle design of borehole 2 can improve the monitoring accuracy of fiber optic sensor 3 on roof stress changes and ensure the accuracy of the data. The tilted arrangement of borehole 2 can expand the monitoring range, allowing fiber optic sensor 3 to better capture stress changes in the roof and surrounding rock. The 45°-60° angle design can ensure the monitoring effect while facilitating construction, reducing construction difficulty and cost. Through more accurate monitoring, the system can issue a timely warning when stress exceeds the preset threshold, providing more time for staff to take preventive measures. The tilt angle of borehole 2 can be adjusted according to different tunnel 200 conditions and geological structures, improving the adaptability and flexibility of the system.

[0060] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0062] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0063] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0064] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0065] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A rock burst monitoring and early warning system for two lanes ahead of the working face, characterized by: include: A mounting pipe (1), wherein a slurry hole (101) is provided on a pipe wall of the mounting pipe (1), a first end of the mounting pipe (1) is used to extend into a borehole (2) provided on a top plate of a tunnel (100), and a second end of the mounting pipe (1) is used to be connected to a grouting machine so that the grouting machine can transport slurry into the mounting pipe (1) and into the borehole (2) through the mounting pipe (1); an optical fiber (3), wherein a first end of the optical fiber (3) extends into the mounting tube (1) through the second end of the mounting tube (1) and is connected to the first end of the mounting tube (1), and a second end of the optical fiber (3) is placed outside the mounting tube (1); a data processing unit (4), the data processing unit (4) being connected to the second end of the optical fiber (3) and being used for monitoring and processing strain data of the optical fiber (3) to obtain advance support pressure distribution information of the roof of the tunnel (100); an early warning unit (5), the early warning unit (5) being connected to the data processing unit (4) by signal, and when the advance support pressure of the top plate of the tunnel (100) exceeds a preset value, the early warning unit (5) issues an early warning signal; A display unit is connected to the early warning unit (5) and is used to display the early warning signal.

2. The rock burst monitoring and early warning system for the two lanes ahead of the working face according to claim 1 is characterized in that: There are multiple slurry holes (101), and the multiple slurry holes (101) are divided into multiple hole groups. The multiple hole groups are arranged at intervals along the axial direction of the mounting tube (1), and each hole group includes multiple slurry holes (101) arranged at intervals along the circumference of the mounting tube (1).

3. The rock burst monitoring and early warning system for the two lanes ahead of the working face according to claim 1 is characterized in that: It comprises a connector (6), the connector (6) being detachably inserted into the first end of the installation tube (1), and the connector (6) being connected to the optical fiber (3).

4. The rock burst monitoring and early warning system for the two lanes ahead of the working face according to claim 3 is characterized in that: The connector (6) has a first perforation (601) and a second perforation (602) arranged at intervals along the radial direction of the mounting tube (1); the first perforation (601) and the second perforation (602) both extend along the axial direction of the mounting tube (1); the first end of the optical fiber (3) passes through the first perforation (601), then bends and passes through the second perforation (602) and is connected to the optical fiber (3).

5. The rock burst monitoring and early warning system for two lanes ahead of the working face according to claim 1 is characterized in that: The second end of the mounting tube (1) is provided with a plug (7), and the plug (7) comprises a first plug (701) and a second plug (702), wherein the first plug (701) and the second plug (702) are arranged on the outer peripheral surface of the mounting tube (1) at intervals along the axial direction of the mounting tube (1) and are used to block the space between the mounting tube (1) and the borehole (2).

6. The rock burst monitoring and early warning system for the two lanes ahead of the working face according to claim 1 is characterized in that: A wire hole (102) is provided on the wall of the installation tube (1) near the second end, and the wire hole (102) is used for the optical fiber (3) to pass through.

7. The rock burst monitoring and early warning system for the two lanes ahead of the working face according to claim 1 is characterized in that: It also includes a grouting adapter (8), the grouting adapter (8) including a large diameter section (801) and a small diameter section (802) connected to each other, the outer diameter of the large diameter section (801) being larger than the outer diameter of the small diameter section (802), the small diameter section (802) being inserted into the second end of the installation pipe (1), and the large diameter section (801) being used to be connected to the grouting pipe of the grouting machine.

8. The rock burst monitoring and early warning system for two lanes ahead of the working face according to claim 1 is characterized in that: The mounting tube (1) is made of plastic material.

9. A method for monitoring and early warning of rock burst in two lanes ahead of a working face, characterized in that: The method is applied to the rock burst monitoring and early warning system for the two lanes ahead of the working face according to any one of claims 1 to 8, comprising: S1. Arranging a plurality of drill holes (2) inclined relative to a horizontal plane on a roof of a working face advance tunnel (100), wherein the plurality of drill holes (2) are arranged at intervals along a longitudinal direction of the tunnel (100); S2, placing the optical fiber (3) in the installation tube (1), and placing the installation tube (1) in the drilled hole (2); S3, using a grouting machine to fill the borehole (2) and the installation pipe (1) with slurry through the installation pipe (1), and allowing the slurry to solidify; S4, connecting the optical fiber (3) and the information processing unit in series to monitor the strain data of the optical fiber (3), and using the data processing unit (4) to perform inversion based on the strain data of the optical fiber (3) to obtain the leading support pressure distribution of the working surface S5. Compare the advance support pressure with a preset value. When the preset value is exceeded, the early warning unit (5) issues an early warning signal, and displays the early warning signal through the display unit.

10. The method for monitoring and early warning of rock burst in two lanes ahead of the working face according to claim 9, characterized in that: The angle between the axis of the borehole (2) and the axial direction of the tunnel (100) is 45°-60°.

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