On-site monitoring method for physical-thermal multi-field performance of cemented filling

Abstract

The invention discloses a cemented filling force-heat multi-field performance field monitoring method. The method comprises the steps that firstly, a combined casing pipe is adopted as a monitoring supporting column for supporting in an open goaf, and secondly, sensors are arranged to form comprehensive monitoring of different areas; 3, arranging a strain-temperature sensor and a stress-temperature sensor at the end part of the horizontal steel pipe in a crossed manner; 4, bundling a plurality of communication cables in the supporting rod together, and then conveying the bundled communication cables to the position of a lower disc data acquisition box from a stope connection way; and fifthly, a filling retaining wall is laid at the end of the footwall of the goaf, filling treatment is conducted on the goaf subsequently, and after filling is completed, a large-size cemented filling body is formed in the stope. According to the method, the occurrence state of the filling body in the stope can be accurately judged, the stability of the filling body in the mining process is judged in real time, the maintenance age and the maintenance temperature of the filling body can be accurately controlled, and high-efficiency mining of a mine is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of stress monitoring, and in particular relates to a method for on-site monitoring of mechanical-thermal multi-field performance of a cemented filling body. Background Art

[0002] With the increase in the depth of mining, backfill mining has become the most effective means to control the ground pressure in deep mining areas and achieve safe mining, and the quality of the backfill is directly related to the safety of mining operations. The backfill slurry in underground mining areas solidifies from a flowing liquid state to a backfill through a hydration reaction, replacing the ore as a new support. Affected by factors such as deep well depth, high stress, high well temperature, and strong disturbance caused by mining, the changing rules of the backfill in the process of consolidation, heat release, settlement, strength increase, and coupling with the surrounding rock have not yet been clarified. Most of the methods for judging the quality of underground backfill use drilling rigs to take the backfill core to verify the uniaxial compressive strength, which can easily cause damage to the backfill and cannot truly reflect the stress environment underground. How to monitor the quality of underground backfill and provide a basis for mine safety production is an engineering and technical problem that needs to be solved urgently.

[0003] A Chinese patent with publication number CN103528731A proposes an online monitoring system for coal mine paste filling based on fiber grating sensing. Before the goaf is filled, the system is fixed to the top and bottom plates of the filling space by a support rod and a telescopic rod. The fiber grating sensor group is installed in the middle of the telescopic rod, and the filling body is monitored in real time based on the optical fiber connector led out from the tail of the support rod. The monitoring area of ​​this method is limited, and long-term and accurate filling body monitoring cannot be achieved.

[0004] A Chinese patent with publication number CN108386223A proposes a two-step mining filling deformation monitoring method. After the filling body in the first step reaches a certain strength, a small chamber is excavated at the upper filling body retaining wall, horizontal holes are drilled with a drill, and grouting is performed after a multi-point displacement meter is installed. The signal monitored by this method is limited and real-time data collection cannot be achieved. Summary of the invention

[0005] In order to overcome the defects of the above-mentioned prior art, the purpose of the present invention is to provide a method for on-site monitoring of the mechanical and thermal multi-field properties of cemented backfill. The method can accurately determine the occurrence state of the backfill in the mining field by real-time collection of the thermodynamic characteristics of the backfill such as temperature, deformation, stress, etc. during the mining cycle, and realize real-time judgment of the stability of the backfill during the mining process, which helps to accurately control the curing age and curing temperature of the backfill and realize high-efficiency mining of underground mines.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: A method for monitoring the mechanical-thermal multi-field performance of a cemented filling body on site comprises the following steps; Step 1: Setting a force-heat multi-field monitoring sensor to collect the thermodynamic characteristics of the overall deformation of the cemented filling body after cemented filling of the mining space; using a vertical combined casing as a monitoring support for the force-heat multi-field monitoring sensor in the mining space, the combined casing includes a vertically placed support rod and a telescopic rod, and the support rod is located at the lower part of the telescopic rod; Step 2: Arrange multiple layers of horizontal steel pipes on the support rods and extend them diagonally to the outside of the support rods for a certain distance. Force-heat multi-field monitoring sensors are set at both ends of the horizontal steel pipes to form comprehensive monitoring of different areas. Step 3: The force-heat multi-field monitoring sensor includes a strain-temperature sensor and a stress-temperature sensor. A strain-temperature sensor is arranged at one end of the horizontal steel pipe, and a stress-temperature sensor is arranged at the other end. The strain-temperature sensors and stress-temperature sensors are arranged crosswise at both ends of the adjacent horizontal steel pipes in the upper and lower layers. Step 4: Connect the strain-temperature sensor and stress-temperature sensor to the communication cables respectively; Step 5: After the force-heat multi-field monitoring sensors are laid out inside the mined area, a filling retaining wall is laid at the end of the lower plate of the mined area, and the mined area is subsequently filled. After the filling is completed, a large volume of cemented filling body is formed in the mining area, and the internal force-heat multi-field monitoring sensors collect the thermodynamic characteristics of the cemented filling body in real time.

[0007] In the step one, the mined void is generated after the mining is completed by the layered or route filling method. The length of the support rod is 4.5m, the length of the telescopic rod is 0.6m, the length of the telescopic rod is adjusted by a thread, the length is adjusted by 0.1m, the bottom of the support rod is fixed to the bottom of the mined void, the length of the telescopic rod is adjusted so that the top of the telescopic rod is fixed to the top of the mined void, and the height of the mined void corresponding to the layered or routed method is 5m.

[0008] In the step 2, an inclined horizontal pipe bracket is arranged at the intersection of the horizontal steel pipe and the support rod, one end of the horizontal pipe bracket is installed under the horizontal steel pipe, and the other end is installed on the side of the support rod, and the horizontal pipe bracket fixes the horizontal steel pipe; three horizontal steel pipes are arranged at different heights on the support rod; strain-temperature sensors and stress-temperature sensors are arranged on both sides of the same height, and the sensors on the same side are arranged crosswise to ensure that a total of three strain-temperature sensors and three stress-temperature sensors are installed; the strain-temperature sensor and the stress-temperature sensor are respectively fixed to the outside of the horizontal pipeline, and the tails of the strain-temperature sensor and the stress-temperature sensor are connected to the communication cable, and the communication cable is led from the inside of the horizontal steel pipe to the support rod; The strain-temperature sensor, stress-temperature sensor and the end of the horizontal steel pipe are sealed with anti-corrosion foaming agent to ensure that after the monitoring pillar is installed, the cementing filling body from the filling pipeline cannot enter the interior of the horizontal steel pipe. The filling pipeline is set along the slope of the mined part of the mining area.

[0009] The support rods are provided with horizontal steel pipes at heights of 4m, 2.5m and 1m respectively; The horizontal steel pipe at the 4m position uses the support rod as the dividing point, with one side 0.5m long and the other side 1.5m long. The positions of the horizontal steel pipes differ by 180°. A strain-temperature sensor is arranged at the end of the 0.5m horizontal steel pipe; a stress-temperature sensor is arranged at the end of the 1.5m horizontal steel pipe. The horizontal steel pipe at the 2.5m position uses the support rod as the dividing point, with the lengths of both sides being 1.0m respectively, and the positions of the horizontal steel pipes differ by 180°; A stress-temperature sensor is arranged at the end of the horizontal steel pipe on the same side as the horizontal steel pipe 0.5m long at the 4m position, and a strain-temperature sensor is arranged at the end of the horizontal steel pipe on the same side as the horizontal steel pipe 1.5m long at the 4m position; The horizontal steel pipe at the 1m position uses the support rod as the dividing point. One side is 1.5m long and the other side is 0.5m long. The positions of the horizontal steel pipes differ by 180°. A strain-temperature sensor is arranged at the end of the 1.5m horizontal steel pipe, and a stress-temperature sensor is arranged at the end of the 0.5m horizontal steel pipe.

[0010] The strain-temperature sensor uses a VWS vibrating wire strain gauge, and the stress-temperature sensor uses a VWE vibrating wire stress gauge.

[0011] In the step 4, the communication cables are arranged through the horizontal steel pipe and the support rod, and a plurality of communication cables are bundled together in the support rod and then transported from the stope contact road to the location of the lower wall data collection box; When the communication cable is laid horizontally along the ground in the mining field communication channel, it is led out from the horizontal steel pipe. The support rod is a hollow tube so that the communication cable can be led out from the mined area to ensure that the filling slurry cannot enter the horizontal steel pipe. The mining field communication channel is set at the end of the mined area.

[0012] In the step five, the communication cable transmits the collected information to the data collection box for reading and storage, and the data collection box is powered by a power cable drawn out through the power supply box; the data collected by the data collection box is transmitted to the R step four 85 hub through the communication cable, and is transmitted to the optical fiber sensor through the R step four 85 hub. The optical fiber sensor uses the monitoring signal to transmit the data to the monitoring platform in the surface dispatching hall for timely acquisition and storage of the data, thereby realizing online real-time monitoring and analysis and processing functions.

[0013] A GDA type multifunctional collector is arranged between the communication cable and the R step four 85 hub, and the GDA type multifunctional collector collects and summarizes the data. A communication cable is output from the GDA type multifunctional collector and transmitted to the R step four 85 hub, and the R step four 85 hub then summarizes the output communication cables of each mining level.

[0014] By analyzing the data collected by the data collection box, the safety threshold is set to evaluate the overall safety of the cemented filling body. When the deformation of the cemented filling body exceeds 1cm and the stress change exceeds 1MPa, a mining site warning is issued.

[0015] Beneficial effects of the present invention: 1) The present invention realizes on-site monitoring of the force-heat multi-field performance of cemented filling bodies in the stope, thereby achieving the study of the temporal and spatial variation law of the temperature field during the hydration reaction and solidification process of large-volume cemented filling bodies in the stope, and obtaining the overall force and movement law of large-volume cemented filling bodies, providing a basis for the coupled analysis of the force-heat multi-field performance variation law of cemented filling bodies; 2) The present invention coordinates and fixes the sensor position through the support rod and the telescopic rod, and the specific position of the sensor can be reasonably controlled by adjusting the position and length of the horizontal steel pipe. The multi-position sensor layout can realize the accurate positioning of the mining site; it is easy to install and has strong sealing performance, which can effectively protect the safety of the sensor and the cable, and can realize long-term effective and accurate monitoring of the filling body in the deep mining site; 3) The present invention accurately collects and stores monitoring data, can evaluate the safety of filling bodies through safety thresholds, and can effectively predict and warn the stability of cemented filling bodies in underground mining areas, providing a basis for taking effective measures to control the stability of mining areas in a timely manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a layout diagram for on-site monitoring of the mechanical-thermal multi-field performance in the present invention.

[0017] Figure 2 This is a schematic diagram of the installation of monitoring sensors in the mining area of ​​the present invention.

[0018] Figure 3 It is a specific implementation flow chart of on-site monitoring in the present invention.

[0019] Reference numerals: 1. Upper stage transport tunnel; 2. Filling pipeline; 3. Mined ore body; 4. Cemented filling body; 5. Mined void area; 6. Force-heat multi-field monitoring sensor; 7. Filling retaining wall; 8. Horizontal hollow casing; 9. Mining field connecting road; 10. Vein transport tunnel; 11. Data acquisition box; 12. Power supply box; 13. R step four 85 hub; 14. Fiber optic sensor; 15. Surface monitoring platform; 16. Support rod; 17. Telescopic rod; 18. Communication cable; 19. Horizontal pipe bracket; 20. Horizontal steel pipe; 21. Stress-temperature sensor; 22. Strain-temperature sensor; 23. Power cable. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0021] The present invention provides a method for monitoring the mechanical and thermal multi-field performance of cemented filling bodies in the field in order to accurately and effectively evaluate the quality of cemented filling bodies. Figure 3 The construction process shown is carried out; The specific steps include: Step 1: Carry out construction preparation, determine the appropriate mining site, and prepare the equipment required for the system, mainly including support rods 16, telescopic rods 17, stress-temperature sensors 21, strain-temperature sensors 22, communication cables 18, data acquisition boxes 11, surface monitoring platforms 15 and other equipment; like Figure 1 As shown, after the mining of the ore body 3 is completed, a mining void 5 is formed, and a filling pipeline 2 is set along the slope of the mining part of the mining void 5. After the monitoring equipment is arranged and laid out, the cementing filling body 4 is injected through the filling pipeline 2, and the top of the mining ore body 3 is the upper stage transportation tunnel 1; Step 2: After the mining is completed by the layered or route filling method, the layered or route height is 5m, and the mining void 5 is generated; Step 3: Arrange monitoring equipment in the mining area 5 with a height of 5m. The design adopts a combined casing as a monitoring support. The combined casing includes a support rod 16 and a telescopic rod 17. The support rod 16 is fixed to the bottom of the mining area 5 through a bracket. The length of the telescopic rod 17 is adjusted so that the end of the telescopic rod 17 is fixed to the top plate of the mining area 5. The support rod 16 is a hollow tube so that the communication cable 18 can be led out from the mining area 5. Step 4: Control the layer or route height to 5m, arrange horizontal steel pipes 20 at the positions of 1m, 2.5m, and 4m of the support rod 16, respectively, and extend the horizontal steel pipes 20 diagonally outward and are fixed by inclined horizontal pipe brackets 19: Step 5: Figure 2As shown, the lengths of the horizontal steel pipes 20 at the 4m position of the support rod 16 are 0.5m and 1.5m respectively, the positions of the horizontal steel pipes 20 differ by 180°, a strain-temperature sensor 22 is arranged at the end of the 0.5m horizontal steel pipe 20, and a stress-temperature sensor 21 is arranged at the end of the 1.5m horizontal steel pipe 20; the lengths of the horizontal steel pipes 20 at the 2.5m position of the support rod 16 are 1.0m and 1.0m respectively, the positions of the horizontal steel pipes 20 differ by 180°, a stress-temperature sensor 21 is arranged at the end of the 1.0m horizontal steel pipe 20 on the left, and a strain-temperature sensor 22 is arranged at the end of the 1.0m horizontal steel pipe 20 on the right; the lengths of the horizontal steel pipes 20 at the 1m position of the support rod 16 are 1.5m and 0.5m respectively, the positions of the horizontal steel pipes 20 differ by 180°, a strain-temperature sensor 22 is arranged at the end of the 1.5m horizontal steel pipe 20, and a stress-temperature sensor 21 is arranged at the end of the 0.5m horizontal steel pipe; Step 6: Stress-temperature sensors 21 and strain-temperature sensors 22 are arranged crosswise at the ends of the horizontal steel pipe 20. The strain-temperature sensor 22 is arranged at the end of the 0.5m horizontal steel pipe at the 4m position of the support rod, and the stress-temperature sensor 21 is arranged at the end of the 1.5m horizontal steel pipe; the stress-temperature sensor 21 is arranged at the end of the 1.0m horizontal steel pipe on the left at the 2.5m position of the support rod, and the strain-temperature sensor 22 is arranged at the end of the 1.0m horizontal steel pipe on the right; the strain-temperature sensor 22 is arranged at the end of the 1.5m horizontal steel pipe at the 1m position of the support rod, and the stress-temperature sensor 21 is arranged at the end of the 0.5m horizontal steel pipe; the sensor is fixed on the outside of the horizontal steel pipe 20, and the communication cable 18 at the tail of the sensor is led out of the mining field from the inside of the horizontal steel pipe 20; Step 7: The communication cables 18 leading out of the stope are bundled together and transported from the stope contact road 9 to the location of the data acquisition box 11 in the lower wall roadway of the vein transport roadway 10, receiving and storing the monitoring data in the data acquisition box 11, and checking the rationality and accuracy of the monitoring data; if there is a problem with the monitoring data, the sensor line should be checked or the sensor should be replaced in time; Step 8: When the communication cable 18 is laid horizontally along the ground in the mining area 5 and the connecting road 9, it is necessary to lead the wire from the horizontal hollow casing 8, and use an anti-corrosion foaming agent to seal the sensor and the steel pipe end to ensure that the cementing filling body 4 cannot enter the interior of the horizontal steel pipe 20; Step 9: After the communication cable 18 reaches the data acquisition box 11, the data is read and stored. The data acquisition box needs the power supply box 12 to lead out the power cable 23 for power supply; Step 10: The data collected by the data collection box 11 is transmitted to the R step four 85 hub 13 via the communication cable 18; Step 11; after the multi-level communication cables 18 meet, they are transmitted to the optical fiber sensor 14 through the R step four 85 hub 13, and the monitoring signal is used to transmit the data to the surface monitoring platform 15 for timely acquisition and storage of data, realizing online real-time monitoring and analysis and processing functions; Step 12: After the force-heat multi-field monitoring sensor 6 is arranged, a filling retaining wall 7 is laid at the end of the stope footwall of the mining area 5 to perform stope filling treatment; Step 13: The strain-temperature sensor 21 uses a VWS vibrating wire strain gauge, and the stress-temperature sensor 22 uses a VWE vibrating wire strain gauge. The data is transmitted to the GDA multifunctional data collector through the communication cable 18, and then the data is analyzed through the surface monitoring platform 15; Step 14: Set safety thresholds to evaluate the overall safety of the filling body. By analyzing the collected data, when the filling body deformation exceeds 1 cm and the stress change exceeds 1 MPa, a stope warning is issued; Step 15: A total of 6 sensors are arranged on the support rods in the mining area 5, and a total of 6 communication cables 18 are led from the horizontal steel pipes 20 to the support rods 16, which can realize the temporal and spatial monitoring of the deformation of the filling body in the mining area 5.

[0022] When the present invention adopts the layered filling method or the route filling method to mine the ore body, the monitoring equipment is pre-buried before the stope is filled, and the stress, deformation and temperature changes in the stope are monitored in real time by arranging sensors in multiple directions.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for monitoring the mechanical and thermal multi-field performance of cemented filling bodies on site, characterized in that: The steps include: Step 1: a force-heat multi-field monitoring sensor (6) is set to collect the thermodynamic characteristics of the overall deformation of the cemented filling body after cemented filling in the mining void (5), and a vertical combined casing is used in the mining void (5) as a monitoring support for the force-heat multi-field monitoring sensor (6), wherein the combined casing includes a vertically placed support rod (16) and a telescopic rod (17), and the support rod (16) is located at the lower part of the telescopic rod (17); Step 2: multiple layers of horizontal steel pipes (20) are arranged on the support rod (16), and are distributed and extended to the outside of the support rod (16) in a diagonal manner for a certain distance, and force-heat multi-field monitoring sensors (6) are arranged at both ends of the horizontal steel pipes (20) to form comprehensive monitoring of different areas; Step 3: The force-heat multi-field monitoring sensor (6) includes a strain-temperature sensor (21) and a stress-temperature sensor (22); a strain-temperature sensor (21) is arranged at one end of the horizontal steel pipe (20), and a stress-temperature sensor (22) is arranged at the other end; and the strain-temperature sensors (21) and the stress-temperature sensors (22) are arranged crosswise at the two ends of the adjacent horizontal steel pipes (20) in the upper and lower layers; Step 4: The strain-temperature sensor (21) and the stress-temperature sensor (22) are respectively connected to the communication cable (18); Step 5: After the force-heat multi-field monitoring sensor (6) is installed inside the mining void (5), a filling retaining wall (7) is laid at the end of the lower plate of the mining void (5), and the mining void (5) is subsequently filled. After the filling is completed, a large volume of cemented filling body is formed in the mining area, and the internal force-heat multi-field monitoring sensor (6) collects the thermodynamic characteristics of the cemented filling body in real time.

2. A method for monitoring the mechanical and thermal multi-field performance of cemented filling according to claim 1, characterized in that: In the step 1, the mining void (5) is generated after the mining is completed by the layered or route filling method. The length of the support rod (16) is 4.5 m, the length of the telescopic rod (17) is 0.6 m, the length of the telescopic rod (17) is adjusted by a thread, and the length is adjusted by 0.1 m. The bottom of the support rod (16) is fixed to the bottom of the mining void (5), and the length of the telescopic rod (17) is adjusted so that the top of the telescopic rod (17) is fixed to the top of the mining void (5). The height of the mining void (5) corresponding to the layered or routed method is 5 m.

3. A method for monitoring the mechanical and thermal multi-field performance of cemented filling according to claim 1, characterized in that: In the second step, an inclined horizontal pipe support (19) is provided at the intersection of the horizontal steel pipe (20) and the support rod (16), one end of the horizontal pipe support (19) is installed below the horizontal steel pipe (20), and the other end is installed on the side of the support rod (16), and the horizontal pipe support (19) fixes the horizontal steel pipe (20); three horizontal steel pipes (20) are arranged at different heights on the support rod (16); strain-temperature sensors (22) and stress-temperature sensors (21) are arranged on both sides of the same height, and the sensors on the same side are arranged crosswise; the strain-temperature sensors (22) and stress-temperature sensors (21) are respectively fixed to the outside of the horizontal pipe (20), and the tails of the strain-temperature sensors (22) and the stress-temperature sensors (21) are connected to the communication cables (18), and the communication cables (18) are led from the inside of the horizontal steel pipe (20) to the support rod (16); The strain-temperature sensor (22), the stress-temperature sensor (21) and the ends of the horizontal steel pipe (20) are sealed with an anti-corrosion foaming agent.

4. A method for monitoring the mechanical and thermal multi-field performance of cemented filling according to claim 3, characterized in that: The support rod (16) is provided with horizontal steel pipes (20) at heights of 4m, 2.5m and 1m respectively; The horizontal steel pipe (20) at the 4m position has the support rod (16) as the dividing point, one side is 0.5m long and the other side is 1.5m long. The positions of the horizontal steel pipes (20) differ by 180°. A strain-temperature sensor (22) is arranged at the end of the 0.5m horizontal steel pipe (20); and a stress-temperature sensor (21) is arranged at the end of the 1.5m horizontal steel pipe (20). The horizontal steel pipe (20) at the 2.5m position has the support rod (16) as the dividing point, and the lengths of both sides are 1.0m respectively, and the positions of the horizontal steel pipe (20) differ by 180°; a stress-temperature sensor (21) is arranged at the end of the horizontal steel pipe (20) on the same side as the horizontal steel pipe (20) at the 4m position which is 0.5m long, and a strain-temperature sensor (22) is arranged at the end of the horizontal steel pipe (20) on the same side as the horizontal steel pipe (20) at the 4m position which is 1.5m long; The horizontal steel pipe (20) at the 1m position has the support rod 16 as the dividing point, one side is 1.5m long and the other side is 0.5m long. The positions of the horizontal steel pipes (20) differ by 180°. A strain-temperature sensor (22) is arranged at the end of the 1.5m horizontal steel pipe (20), and a stress-temperature sensor (21) is arranged at the end of the 0.5m horizontal steel pipe.

5. A method for monitoring the mechanical and thermal multi-field performance of cemented filling body according to claim 4, characterized in that: The strain-temperature sensor (22) is a VWS type vibrating wire strain gauge, and the stress-temperature sensor (21) is a VWE type vibrating wire stress gauge.

6. A method for monitoring the mechanical and thermal multi-field performance of cemented filling body according to claim 4, characterized in that: In the fourth step, the communication cables (18) are arranged through the horizontal steel pipe (20) and the support rod (16), and a plurality of communication cables (18) are bundled together in the support rod (16) and then transported from the stope contact road (9) to the location of the lower wall data collection box (11); When the communication cable (18) is horizontally laid along the ground in the mining field connecting road (9), it is led out from the horizontal steel pipe (20). The support rod (16) is a hollow tube used to lead the communication cable (18) out from the mining empty area (5). The mining field connecting road (9) is set at the end of the mining empty area (5).

7. A method for monitoring the mechanical and thermal multi-field performance of cemented filling body according to claim 6, characterized in that: In the step five, the communication cable (18) transmits the collected information to the data collection box (11) for reading and storing the data. The data collection box (11) is powered by a power cable (23) drawn out from the power supply box (12). The data collected by the data collection box (11) is transmitted to the R step four 85 hub (13) through the communication cable (18), and is transmitted to the optical fiber sensor (14) through the R step four 85 hub (13). The optical fiber sensor (14) uses a monitoring signal to transmit the data to the monitoring platform (15) in the surface dispatching hall for timely acquisition and storage of the data, thereby realizing online real-time monitoring and analysis and processing functions.

8. A method for monitoring the mechanical and thermal multi-field performance of cemented filling body according to claim 7, characterized in that: A GDA type multifunctional data collector is arranged between the communication cable (18) and the R step four 85 hub (13). The GDA type multifunctional data collector collects and summarizes data. A communication cable is output from the GDA type multifunctional data collector and transmitted to the R step four 85 hub (13). The R step four 85 hub (13) then summarizes the communication cables outputted from each mining level.

9. A method for monitoring the mechanical and thermal multi-field performance of cemented filling body according to claim 7, characterized in that: By analyzing the data collected by the data collection box (11), a safety threshold is set to evaluate the overall safety of the cemented filling body. When the deformation of the cemented filling body exceeds 1 cm and the stress change exceeds 1 MPa, a stope warning is issued.

Images