Stope filling roof-contacted monitoring device and method based on laser-ultrasonic dual mode

Abstract

The invention provides a stope filling roof contact monitoring device and method based on laser-ultrasonic dual modes, and relates to the technical field of mine filling mining. The monitoring device comprises a signal transmitting module and a signal receiving module, the signal transmitting module comprises an ultrasonic transmitting module and a laser transmitting module, and the signal receiving module comprises a laser receiver and an ultrasonic receiver. The monitoring method comprises the steps of installing the signal transmitting module and the signal receiving module, verifying the stability of a signal link, and monitoring by the monitoring device. According to the monitoring device and method, a laser mode and an ultrasonic mode are applied at the same time, the precise positioning characteristic of a laser signal and the global coverage capacity of an ultrasonic signal are utilized, the complementary monitoring advantage is formed, the blind area and the precision defect of single signal monitoring are effectively eliminated, and whole-course real-time uninterrupted judgment of the filling body roof contact state is achieved. The device adopts a modular design and installation mode, the underground operation process is greatly simplified, the filling operation quality and efficiency are improved, and reliable technical support is provided for filling operation.

Description

Technical Field

[0001] This invention relates to the field of mining backfilling technology, and in particular to a monitoring device and method for monitoring the roof connection of backfilling in mining areas based on laser-ultrasound dual-mode. Background Technology

[0002] Currently, with the deepening of green mine construction, backfill mining has gradually become a commonly used mining method in metal mines. This method, by preparing backfill slurry from mineral processing tailings and backfilling it into the stope and goaf, not only effectively solves the environmental problems caused by solid waste accumulation but also significantly improves the safety of mining and the resource recovery rate. Backfill mining requires a high roof contact ratio in the backfill stope; a good roof contact effect is essential for the backfill body to support the roof and protect the safety of surrounding stopes during mining.

[0003] However, in the current field of backfilling and roof connection monitoring, Chinese invention patent CN120294770A discloses an online monitoring system and method for backfilling and roof connection based on laser ranging. This detection system only uses lasers for detection and can only detect complex structural features such as roof overhangs and honeycomb cracks. Chinese invention patent CN118980415A discloses an intelligent monitoring device for backfilling and roof connection in mining operations, which uses ultrasonic measurement to calculate distance or liquid level height. Existing technologies can only use lasers or ultrasound for monitoring, resulting in a single monitoring signal and an inability to obtain comprehensive data. Summary of the Invention

[0004] This invention provides a monitoring device and method for mine filling and roof connection based on laser-ultrasound dual-mode, addressing the problems existing in the prior art.

[0005] To address the aforementioned problems, the present invention provides the following technical solution:

[0006] On one hand, the present invention provides a monitoring device for mine filling and roof connection based on laser-ultrasound dual mode, including a signal transmitting module and a signal receiving module. The signal transmitting module includes an ultrasonic transmitting module and a laser transmitting module, and the signal receiving module includes a laser receiver and an ultrasonic receiver.

[0007] Optionally, the ultrasonic transmitting module includes a flame-retardant and explosion-proof housing, which is installed inside the outer shell of the transmitting end. A piezoelectric ultrasonic transducer and an ultrasonic transmitting probe are mounted on the flame-retardant and explosion-proof housing, and the piezoelectric ultrasonic transducer is electrically connected to the ultrasonic transmitting probe.

[0008] Optionally, the laser emitting module includes a flame-retardant and explosion-proof housing II, which is installed inside the outer shell of the emitting end. A laser generator and a laser emitting probe are mounted on the flame-retardant and explosion-proof housing II, and the laser generator and the laser emitting probe are electrically connected.

[0009] Optionally, the signal receiving module includes a PVC central fixing tube, and a laser receiver and an ultrasonic receiver are installed on the outside of the PVC central fixing tube, and the laser receiver and the ultrasonic receiver are electrically connected to the host respectively.

[0010] Optionally, a high-transparency acrylic shell is fitted over the outer side of the PVC central fixing tube, and the laser receiver and the ultrasonic receiver are located inside the high-transparency acrylic shell.

[0011] Optionally, the signal transmitting module includes a transmitting end housing, a top fixing plate is installed on the top of the transmitting end housing, a bottom reinforcing plate is installed on the bottom, and the top fixing plate is provided with threaded holes.

[0012] Optionally, a mobile power supply compartment is detachably installed on the bottom reinforcement plate inside the transmitter housing. A power regulator is installed inside the transmitter housing. The mobile power supply compartment is electrically connected to the power regulator, the laser generator, and the laser emission probe. The mobile power supply compartment is also electrically connected to the ultrasonic emission probe.

[0013] Optionally, a vibration isolation fixing ring is installed on the top of the bottom reinforcement plate, inside the transmitter housing, and a mobile power supply compartment can be detachably installed on the top of the vibration isolation fixing ring.

[0014] On the other hand, the present invention provides a method for monitoring the roof connection of mined filling based on laser-ultrasound dual-mode, wherein the monitoring method employs the aforementioned monitoring device, and is characterized in that the monitoring method includes:

[0015] In the direction of the route, determine and mark the central axis of the route, mark the installation point in the complete area of ​​the top plate, and install the top mounting plate of the signal transmitting module at the installation point;

[0016] Turn on the laser emitting module, which releases a laser signal. Capture the laser signal spot and mark the position on the top plate corresponding to the spot. Install the signal receiving module at the marked position on the top plate.

[0017] The signal receiving module is connected to the host outside the route via a cable. After starting the monitoring device, it verifies the stability of the signal link between the signal transmitting module and the signal receiving module and then performs real-time monitoring.

[0018] Optionally, when verifying the stability of the signal link between the signal transmitting module and the signal receiving module, the data received by the signal receiving module is continuously collected and recorded to check for signal loss, delay or interference.

[0019] The above technical solution has at least the following advantages compared with the existing technology:

[0020] The monitoring device in this embodiment of the above-described scheme simultaneously employs both laser and ultrasonic modes. It leverages the precise positioning characteristics of laser signals and the full-coverage capability of ultrasonic signals to create complementary monitoring advantages. This effectively eliminates blind spots and accuracy deficiencies inherent in single-signal monitoring, enabling real-time, uninterrupted determination of the filling body's contact status throughout the entire process. This addresses the challenge of traditional manual detection in tracking the dynamic filling process. The device adopts a modular design and installation method, significantly simplifying downhole operations, improving the quality and efficiency of filling operations, and providing reliable technical support for filling operations. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the signal transmission module of the laser-ultrasonic dual-mode monitoring device for monitoring the backfilling and roof connection in a mining area according to the present invention.

[0023] Figure 2 This is a side view of the signal transmission module of the laser-ultrasonic dual-mode mining site filling and roof monitoring device of the present invention;

[0024] Figure 3 This is a schematic diagram of the laser emission module of the signal emission module of the laser-ultrasound dual-mode monitoring device for monitoring the backfilling and roof connection in a mining area according to the present invention.

[0025] Figure 4 This is a schematic diagram of the ultrasonic transmission module of the signal transmission module of the laser-ultrasonic dual-mode monitoring device for monitoring the backfilling and roof connection of a mining area according to the present invention.

[0026] Figure 5 This is a schematic diagram of the signal receiving module of the monitoring device for mine filling and roof connection based on laser-ultrasound dual mode according to the present invention;

[0027] Figure 6 This is a schematic diagram of the mine installation of the laser-ultrasonic dual-mode mine filling and roof connection monitoring device of the present invention.

[0028] Figure 7 This is a flowchart of the method for monitoring the backfilling and roof connection of a mining area based on laser-ultrasound dual-mode according to the present invention.

[0029] The annotations in the attached figures are explained as follows:

[0030] 1. Transmitter housing; 2. Power bank compartment; 3. Ultrasonic transmitting module; 4. Laser transmitting module; 5. Power regulator; 6. Flame-retardant and explosion-proof housing; 7. Piezoelectric ultrasonic transducer; 8. Ultrasonic transmitting probe; 9. Flame-retardant and explosion-proof housing; 10. Laser generator; 11. Laser transmitting probe; 12. Middle vibration isolation pad; 13. Top vibration isolation pad; 14. Vibration isolation fixing ring; 15. Top fixing plate; 16. Fixing threaded hole; 17. Bottom reinforcing plate; 18. PVC central fixing tube; 19. Laser receiver; 20. Ultrasonic receiver; 21. High-transparency acrylic housing; 22. Cable; 23. Main unit. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising,” “including,” or “including,” and similar terms mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. The terms “connected,” “linked,” or “connected,” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0033] It should be noted that the terms "up", "down", "left", "right", "front", and "back" used in this invention are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0034] Example 1

[0035] like Figures 1-6As shown in the illustration, this embodiment provides a monitoring device for the roof contact of stope filling based on a laser-ultrasonic dual-mode system. It is characterized by including a signal transmitting module and a signal receiving module. The signal transmitting module includes an ultrasonic transmitting module 3 and a laser transmitting module 4, and the signal receiving module includes a laser receiver 19 and an ultrasonic receiver 20. This monitoring device simultaneously utilizes both laser and ultrasonic modes, leveraging the precise positioning characteristics of laser signals and the full-area coverage capability of ultrasonic signals to form complementary monitoring advantages. This effectively eliminates blind spots and accuracy deficiencies in single-signal monitoring, achieving real-time, uninterrupted determination of the roof contact status of the filling body throughout the entire process. This solves the pain point of traditional manual detection's difficulty in tracking the dynamic filling process. The device adopts a modular design and installation method, significantly simplifying the downhole operation process, improving the quality and efficiency of filling operations, and providing reliable technical support for filling operations.

[0036] like Figure 1 and Figure 2 As shown, the signal transmitting module includes a transmitting end housing 1. A top fixing plate 15 is mounted on the top of the transmitting end housing 1, and a bottom reinforcing plate 17 is mounted on the bottom. Both the top fixing plate 15 and the bottom reinforcing plate 17 are provided with fixing threaded holes 16. The transmitting end housing 1 is provided with an ultrasonic transmitting window and a laser transmitting window. The ultrasonic transmitting window is coaxial with the signal propagation direction of the ultrasonic transmitter, and the laser transmitting window is coaxial with the signal propagation direction of the laser transmitter. The ultrasonic transmitting window and the laser transmitting window allow unobstructed transmission of laser signals and ultrasonic signals. In this embodiment, when the monitoring device is installed and used, the top fixing plate 15 is mounted on the top plate using expansion bolts and fixing threaded holes 16, thereby fixing the monitoring device. Furthermore, the transmitting end housing 1 and the bottom reinforcing plate 17 are detachably connected. Specifically, the fixing threaded holes 16 are evenly distributed, preferably eight fixing threaded holes 16, and preferably the nominal diameter of the fixing threaded holes 16 is 8mm. Preferably, the transmitting end housing is made of stainless steel, and the inner diameter of the housing is 120mm.

[0037] like Figure 1 and Figure 2 As shown, a portable power supply compartment 2 is detachably mounted on the bottom reinforcing plate 17 inside the transmitter housing 1. A power regulator 5 is mounted inside the transmitter housing 1, located above the laser emission module 4. The portable power supply compartment 2 can supply power to the signal emission module. Specifically, the portable power supply compartment 2 is electrically connected to the power regulator 5, the laser generator 10, and the laser emission probe 11, and is also electrically connected to the ultrasonic emission probe 8. The power regulator 5 adjusts the power so that the portable power supply compartment 2 can be adapted to the laser emitter, enabling one portable power supply compartment 2 to simultaneously power both the ultrasonic emission module 3 and the laser emission module 4. Preferably, the portable power supply compartment 2 has a diameter of 110 mm and a height of 30 mm.

[0038] like Figure 4As shown, the ultrasonic transmitting module 3 includes a flame-retardant and explosion-proof housing 6, an ultrasonic transmitting probe 8, and a piezoelectric ultrasonic transducer 7. The flame-retardant and explosion-proof housing 6 is installed inside the transmitting end housing 1 and is located at the lower part of the transmitting end housing 1. The ultrasonic transmitting probe 8 and the piezoelectric ultrasonic transducer 7 are installed on the flame-retardant and explosion-proof housing 6, and the piezoelectric ultrasonic transducer 7 is electrically connected to the ultrasonic transmitting probe 8. Specifically, the piezoelectric ultrasonic transducer 7 is installed on the inner side of the flame-retardant and explosion-proof housing 6, and the ultrasonic transmitting probe 8 is installed on the outer side of the flame-retardant and explosion-proof housing 6. Multiple ultrasonic transmitting probes 8 are evenly distributed. Specifically, there can be four ultrasonic transmitting probes 8, each corresponding to an ultrasonic transmitting window, and the ultrasonic transmitting probe 8 is exposed at the ultrasonic transmitting window. More specifically, the ultrasonic transmitting probes 8 are arranged such that, from a top view angle and under clockwise rotation, the included angles between two adjacent ultrasonic transmitting probes 8 are 60°, 120°, 60°, and 120°, respectively.

[0039] like Figure 3 As shown, the laser emitting module 4 includes a flame-retardant and explosion-proof housing 9, which is installed inside the emitting end housing 1. A laser generator 10 and a laser emitting probe 11 are mounted on the flame-retardant and explosion-proof housing 9, and the laser generator 10 and laser emitting probe 11 are electrically connected. Specifically, the laser generator 10 is installed on the inner side of the flame-retardant and explosion-proof housing 9, and the laser emitting probe 11 is installed on the outer side of the flame-retardant and explosion-proof housing 9. Multiple laser emitting probes 11 are evenly distributed; specifically, four laser emitting probes 11 can be provided, each corresponding to a laser emitting window, and the laser emitting probe 11 is exposed at the laser emitting window. More specifically, the laser emitting probes 11 are arranged such that, from a top-view perspective and under clockwise rotation, the included angles between two adjacent laser emitting probes 11 are 60°, 120°, 60°, and 120°, respectively.

[0040] like Figure 5 and Figure 6 As shown, the signal receiving module includes a PVC central fixing tube 18 and a high-transparency acrylic shell 21. A laser receiver 19 and an ultrasonic receiver 20 are installed on the outside of the PVC central fixing tube 18. The high-transparency acrylic shell 21 is fitted on the outside of the PVC central fixing tube 18. The laser receiver 19 and the ultrasonic receiver 20 are located on the inside of the high-transparency acrylic shell 21. The laser receiver 19 and the ultrasonic receiver 20 are electrically connected to the host 23, respectively. The laser receiver 19 is electrically connected to the laser generator 10, and the ultrasonic receiver 20 is electrically connected to the ultrasonic generator.

[0041] For example Figure 1 and Figure 2As shown, a top vibration isolation pad 13 is installed at the bottom of the top mounting plate 15. The top vibration isolation pad 13 is connected to the top of the flame-retardant and explosion-proof shell 9. The bottom of the flame-retardant and explosion-proof shell 9 is connected to the top of the middle vibration isolation pad 12. The bottom of the middle vibration isolation pad 12 is connected to the top of the power regulator 5. The bottom of the power regulator 5 is connected to the top of the flame-retardant and explosion-proof shell 6. The bottom of the flame-retardant and explosion-proof shell 6 is connected to the top of the vibration isolation fixing ring 14. A vibration isolation fixing ring 14 is installed on the top of the bottom reinforcing plate 17, located inside the transmitter shell 1. The top of the vibration isolation fixing ring 14 can be detachably installed with the mobile power supply compartment 2. The thickness of the top vibration isolation pad 13 and the middle vibration isolation pad 12 is 5mm, which serves as vibration isolation protection. The inner diameter of the vibration isolation fixing ring 14 is 110mm, the outer diameter is 120mm, and the height is 10mm. The vibration isolation fixing ring 14 is used to fix the mobile power supply compartment 2 and provides vibration isolation protection for the mobile power supply compartment 2.

[0042] The piezoelectric ultrasonic transducer 7, ultrasonic transmitting probe 8, laser generator 10, laser transmitting probe 11, laser receiver 19, ultrasonic receiver 20 and main unit 23 in this embodiment all adopt existing technology, and will not be described in detail in this embodiment.

[0043] Example 2

[0044] like Figure 1 As shown, this embodiment provides a method for monitoring the backfilling and roof connection of a mining site based on laser-ultrasound dual-mode. The monitoring method uses the monitoring device of Embodiment 1, and is characterized in that the monitoring method includes:

[0045] S100. Assemble the ultrasonic transmitting module 3, assemble the laser transmitting module 4, and assemble the ultrasonic transmitting module 3, laser transmitting module 4, and transmitting end housing 1 into a signal transmitting module; assemble the signal receiving module.

[0046] S200. In the direction of the route, determine and mark the central axis of the route, mark the installation point in the complete area of ​​the top plate, and install the top mounting plate 15 of the signal transmitting module at the installation point.

[0047] S300, turn on the laser emitting module 4, the laser emitting module 4 releases a laser signal, captures the light spot of the laser signal, marks the position on the top plate corresponding to the light spot, and installs the signal receiving module at the marked position on the top plate;

[0048] S400 and the signal receiving module are connected to the host 23 outside the route via cable 22. The monitoring device is started, and after verifying the stability of the signal link between the signal transmitting module and the signal receiving module, real-time monitoring is performed.

[0049] In step 100, a laser generator 10 is installed inside the flame-retardant and explosion-proof housing 9, and a laser emitting probe 11 is installed outside, completing the assembly of the laser emitting module 4; a piezoelectric ultrasonic transducer 7 is installed inside the flame-retardant and explosion-proof housing 6, and an ultrasonic emitting probe 8 is installed outside, completing the assembly of the ultrasonic emitting module 3. Starting from the bottom reinforcing plate 17, the vibration isolation fixing ring 14, the mobile power supply compartment 2, the ultrasonic emitting module 3, the power regulator 5, the middle vibration isolation pad 12, and the laser emitting module 4 are installed in sequence. The top vibration isolation pad 13 is installed at the bottom of the top fixing plate 15, the bottom of the transmitting end housing 1 is installed on the bottom reinforcing plate 17, and the top fixing plate 15 is installed on the top of the transmitting end housing 1.

[0050] In step 200, the central axis of the route serves as the reference for the subsequent device arrangement, and the signal transmission module corresponds to the central axis. When calibrating the installation point, a region with intact top plate is selected, avoiding broken zones, water spray points, and reserved space for filling pipelines, to ensure that the monitoring device and the production system do not interfere with each other.

[0051] In step 300, after activating the laser emitting module 4, multiple sets of emitted laser signal spots are captured and marked on the top plate at positions corresponding to the spots. Through these steps, the location of the signal receiving end can be accurately determined. During the installation of the signal receiving module, ensure its stability and reliability to prevent displacement due to construction vibrations or minor deformations of the surrounding rock. The laser emitting module 4 and the signal receiving module form a stable optical path alignment.

[0052] In step 400, the host 23 acquires and records the signal. To verify the stability of the signal link between the signal transmitting module and the signal receiving module, the data received by the signal receiving module is continuously acquired and recorded to check for signal loss, delay, or interference.

[0053] The monitoring device and method of this embodiment utilize a laser emitting module and a laser receiver to acquire precise three-dimensional coordinate data and signal strength. Simultaneously, the measured geometric distance constrains and corrects the ultrasonic propagation path, avoiding path errors caused by irregular roof morphology and micro-deformation of the surrounding rock. The ultrasonic signal can penetrate the filling grout and propagate diffracted even when the laser beam path is blocked, covering areas inaccessible to the laser and solving the problem of "limited straight-line propagation" of lasers. Furthermore, changes in the propagation medium can be identified through wave velocity characteristics, echo signals, and frequency domain characteristic parameters in the ultrasonic data, thereby determining whether the filling grout is in contact with the roof.

[0054] The monitoring device in this embodiment simultaneously utilizes both laser and ultrasonic modes, leveraging the precise positioning characteristics of laser signals and the full-coverage capability of ultrasonic signals to form complementary monitoring advantages. This effectively eliminates blind spots and accuracy deficiencies in single-signal monitoring, enabling real-time, uninterrupted determination of the filling body's contact status throughout the entire process. This addresses the pain point of traditional manual detection's difficulty in tracking the dynamic filling process. The device adopts a modular design and installation method, significantly simplifying downhole operation procedures, improving the quality and efficiency of filling operations, and providing reliable technical support for filling operations. The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. The protection and scope of the present invention should be determined by the scope of the claims.

Claims

1. A monitoring device for mine filling and roof connection based on laser-ultrasonic dual-mode, characterized in that, It includes a signal transmitting module and a signal receiving module. The signal transmitting module includes an ultrasonic transmitting module and a laser transmitting module. The signal receiving module includes a laser receiver and an ultrasonic receiver.

2. The monitoring device for mine filling and roof connection based on laser-ultrasonic dual-mode as described in claim 1, characterized in that, The ultrasonic transmitting module includes a flame-retardant and explosion-proof housing, which is installed inside the outer shell of the transmitting end. A piezoelectric ultrasonic transducer and an ultrasonic transmitting probe are installed on the flame-retardant and explosion-proof housing, and the piezoelectric ultrasonic transducer is electrically connected to the ultrasonic transmitting probe.

3. The monitoring device for mine filling and roof connection based on laser-ultrasonic dual-mode as described in claim 1, characterized in that, The laser emitting module includes a flame-retardant and explosion-proof housing II, which is installed inside the outer shell of the emitting end. A laser generator and a laser emitting probe are mounted on the flame-retardant and explosion-proof housing II, and the laser generator and the laser emitting probe are electrically connected.

4. The monitoring device for mine filling and roof connection based on laser-ultrasonic dual-mode according to claim 2 or 3, characterized in that, The signal receiving module includes a PVC central fixing tube, and a laser receiver and an ultrasonic receiver are installed on the outside of the PVC central fixing tube. The laser receiver and the ultrasonic receiver are electrically connected to the host.

5. The monitoring device for mine filling and roof connection based on laser-ultrasonic dual-mode according to claim 4, characterized in that, The outer side of the PVC central fixing tube is fitted with a high-transparency acrylic shell, and the laser receiver and the ultrasonic receiver are located inside the high-transparency acrylic shell.

6. The monitoring device for mine filling and roof connection based on laser-ultrasonic dual-mode according to claim 1, characterized in that, The signal transmitting module includes a transmitter housing, with a top fixing plate installed on the top and a bottom reinforcing plate installed on the bottom. The top fixing plate has threaded holes.

7. The monitoring device for mine filling and roof connection based on laser-ultrasonic dual-mode according to claim 6, characterized in that, A mobile power supply compartment is detachably installed on the bottom reinforcement plate inside the transmitter housing. A power regulator is installed inside the transmitter housing. The mobile power supply compartment is electrically connected to the power regulator, the laser generator, and the laser emission probe. The mobile power supply compartment is also electrically connected to the ultrasonic emission probe.

8. The monitoring device for mine filling and roof connection based on laser-ultrasonic dual-mode according to claim 7, characterized in that, A vibration isolation fixing ring is installed on the top of the bottom reinforcement plate, inside the transmitter housing, and a mobile power supply compartment can be detachably installed on the top of the vibration isolation fixing ring.

9. A method for monitoring the roof connection of a mining area based on laser-ultrasonic dual-mode filling, wherein the monitoring method employs the monitoring device as described in any one of claims 1-8, characterized in that, The monitoring method includes: In the direction of the route, determine and mark the central axis of the route, mark the installation point in the complete area of ​​the top plate, and install the top mounting plate of the signal transmitting module at the installation point; Turn on the laser emitting module, which releases a laser signal. Capture the laser signal spot and mark the position on the top plate corresponding to the spot. Install the signal receiving module at the marked position on the top plate. The signal receiving module is connected to the host outside the route via a cable. After starting the monitoring device, it verifies the stability of the signal link between the signal transmitting module and the signal receiving module and then performs real-time monitoring.

10. The method for monitoring the roof connection of a mining site based on laser-ultrasonic dual-mode as described in claim 9, characterized in that, When verifying the stability of the signal link between the signal transmitting module and the signal receiving module, the data received by the signal receiving module is continuously collected and recorded to check for signal loss, delay or interference.

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