A high-efficiency roof detection system and use method for mine electrical method

Abstract

The invention discloses an efficient roof detection system and a use method for mine electrical method. The system is installed in a tunnel and relates to the technical field of mine water hazard prevention and control. The system comprises a plurality of telescopic detection rods, a connecting line, a measuring line, a field host, an infinite cable and an infinite electrode. The plurality of telescopic detection rods are arranged in the tunnel at equal intervals, and the two ends of each telescopic detection rod are respectively pressed against the roof and the bottom plate of the tunnel. The plurality of telescopic detection rods are connected to the measuring line through the connecting line, and the measuring line is connected to the field host, and the field host is connected to the infinite electrode through the infinite cable to form a multi-channel detection network for roof electrical method. The system can supply power at multiple frequencies, lay out wires and electrodes once, and complete electrical exploration work such as electrical depth sounding, electrical profiling, and electrical perspective of the tunnel roof in one round, thereby reducing the danger of high-altitude operations, ensuring good coupling contact between the electrode and the roof, improving the working efficiency of roof electrical method exploration, and realizing efficient and precise detection of mine roof electrical method.

Description

Technical Field

[0001] The invention relates to the technical field of mine water hazard prevention and control, and in particular to a high-efficiency mine roof detection system using electrical methods and a use method thereof. Background Art

[0002] Mine roof water damage is one of the important factors affecting coal mine safety production. During the mining process of the underground working face, the roof is usually affected by mining and will have caving zones, fissure zones and curved sinking zones. If the caving zones and fissure zones are connected with the upper aquifer or old empty water, roof water damage accidents such as roof water burst, sand burst and mud burst are very likely to occur. In order to prevent the occurrence of roof water burst accidents, the mine should conduct a comprehensive detection of the water-richness of the coal seam roof. At present, the main means of detecting the water-richness of the roof at home and abroad are mine electrical methods such as direct current electrical method, high-density electrical method, parallel electrical method, and audio-frequency electrical perspective method. These technologies have achieved good results in the prevention and control of mine roof water damage due to their strong anti-interference ability and sensitive response to water-containing bodies.

[0003] However, with the continuous mechanization and deepening of coal mining, there are many shortcomings in the mine electrical method in meeting the needs of on-site production; 1. The roof rock is hard, and it is difficult to drive the electrode into the roof. There is no fixed point between the electrode and the roof, and the electrode arrangement is difficult. It is difficult to achieve a one-time arrangement of the electrode on the roof, resulting in the inability to promote the use of multi-channel electrical methods represented by high-density electrical methods and parallel electrical methods. The DC electrical method and audio-frequency electro-perspective method, which are characterized by fewer detection electrodes and simple structure, are single-channel data acquisition methods, with limited geoelectric field data density and low geophysical efficiency; 2. The tunnel roof is too high, and the electrode arrangement is difficult. Personnel need to use ladders to climb up and fix the electrodes on the roof. They need to go up and down the ladder frequently as the measuring point moves. The construction is cumbersome and the labor intensity is high, which greatly increases the danger of high-altitude operations and poses serious safety hazards; 3. The roof rock is hard and dry, and it is difficult to drive the electrode into the rock body. The coupling contact between the electrode and the roof is poor and grounding is difficult. The collected data is highly jumpy and extremely unstable, with large deviations, which seriously affects the precision and reliability of the detection results. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings, the object of the present invention is to provide a high-efficiency roof detection system and a method of use for mine electrical methods.

[0005] To achieve the above object, the present invention is implemented according to the following technical solutions:

[0006] An efficient roof detection system for mine electrical method is installed in the tunnel, including a plurality of telescopic detection rods, connecting wires, a large measuring wire, a field host, an infinite cable and an infinite electrode. The plurality of telescopic detection rods are arranged in the tunnel at equal intervals, and the two ends of each telescopic detection rod are respectively pressed against the roof and the bottom plate of the tunnel. The plurality of telescopic detection rods are connected to the large measuring wire through connecting wires, and the large measuring wire is connected to the field host. The field host is connected to the infinite electrode through an infinite cable to form a multi-channel detection network for roof electrical method. The field host has a multi-channel data acquisition function and can provide data from low frequency to high frequency. The telescopic detection rod comprises a sponge sleeve, a copper electrode, a connecting end, a telescopic inner rod, a tube screw lock, a telescopic outer rod, a handle, and a copper wire. The telescopic inner rod and the telescopic outer rod are connected and fixed by a tube screw lock. One end of the connecting end is fixedly connected to the telescopic inner rod, and the other end of the connecting end is threadedly connected to the copper electrode. The sponge sleeve is fixed to the front end of the copper electrode, and the handle is fixed to the end of the telescopic outer rod away from the tube screw lock. The copper wire is arranged inside the telescopic inner rod, and one end of the copper wire is connected to the copper electrode and the other end is connected to the connecting wire.

[0007] Further, the connecting end is a cylindrical structure with two ends open, a copper base is clamped inside the connecting end, the copper base includes a front fixing portion and a terminal connecting portion, the front fixing portion is provided with an internal threaded hole for connecting a copper electrode, the terminal connecting portion is connected to a copper wire, the outer diameter of the front fixing portion is larger than the outer diameter of the terminal connecting portion, the front fixing portion abuts against the inside of the connecting end, and the terminal connecting portion extends out of the connecting end;

[0008] Furthermore, a spring is sleeved on the terminal connection portion, one end of the spring abuts against the outer wall of the front end fixing portion, and the other end abuts against the inner wall of the connection end;

[0009] Further, the tube rotation lock comprises a locking outer rotating sleeve, a locking inner fixed block, an extrusion block, and a fastening sheet. The locking inner fixed block is fixed to one end of the telescopic outer rod close to the telescopic inner rod, the locking outer rotating sleeve is sleeved on the telescopic inner rod, one end of the locking inner fixed block close to the locking outer rotating sleeve is provided with a plurality of fastening sheets arranged at equal intervals, the inner side of the locking outer rotating sleeve is provided with a plurality of extrusion blocks arranged at equal intervals, and the locking outer rotating sleeve and the locking inner fixed block are clamped together by the cooperation of the fastening sheet and the extrusion block;

[0010] Furthermore, the handle is provided with two fixing plates, a winding drum, a rotating shaft, and an epitaxial wire inside, the two fixing plates are fixed in parallel inside the handle, the two fixing plates are connected by a rotating shaft, the winding drum is clamped between the two fixing plates, a copper inner shaft is provided inside the rotating shaft, the copper inner shaft is connected to the epitaxial wire, a shaft column small gap is provided on the intermediate shaft column of the rotating shaft and the copper inner shaft, the outside of the winding drum is a circular plastic frame, and a winding drum small gap is left on the plastic frame, the inside of the winding drum is a multi-annular spring sheet, the two ends of the multi-annular spring sheet are respectively provided with an inner hook and an outer hook, the outer hook is fixed in the winding drum small gap, the inner hook is fixed in the shaft column small gap of the rotating shaft and the copper inner shaft, the outside of the winding drum is wound with a copper wire, one end of the copper wire is connected to the end of the copper base, and the other end is connected to the outer hook of the multi-annular spring sheet;

[0011] Furthermore, the sponge sleeve is wrapped around the front end of the copper electrode, and the sponge sleeve is soaked in a copper sulfate solution; the coupling contact between the copper electrode and the top plate is improved, and the induced polarization effect of the copper electrode is weakened;

[0012] A method for using a high-efficiency roof detection system using a mine electrical method comprises the following steps:

[0013] S1: Lay a large measuring line in the detection tunnel, calibrate the position of the detection point on the tunnel roof, arrange an infinity electrode on the tunnel floor at a certain distance from the detection area, and connect the infinity electrode to the on-site host with an infinity cable;

[0014] S2: Arrange all telescopic detection rods in the detection tunnel at one time, the position of the telescopic detection rod corresponds to the detection point calibrated on the roof, stretch the detection rod, rotate the locking outer rotating sleeve, rotate the locking outer rotating sleeve and the locking inner fixed block, the fastening sheet detaches from the telescopic inner rod, the telescopic inner rod is in an active state, and then stretch the telescopic inner rod outward, while driving the movement of the copper wire inside the detection rod and the rotation of the winding reel. The copper wire on the winding reel extends outward as the winding reel rotates, and the multi-annular spring sheet on the inner side of the winding reel gradually stretches and compresses. When the telescopic detection rod is pulled out to extend to an appropriate length, the locking outer rotating sleeve is screwed in and tightened, the extrusion block squeezes the fastening sheet, and the fastening sheet squeezes the telescopic inner rod. The telescopic inner rod is in a fastened state. At the same time, the sponge sleeve at the front end of the copper electrode is dipped in copper sulfate solution, and the end of the telescopic detection rod with the copper electrode is pressed against the roof, and the end of the handle is pressed against the bottom plate, so that the copper electrode of the telescopic detection rod is well coupled and contacted with the roof;

[0015] S3: Connect the telescopic detection rod in the measuring tunnel with the measuring wire in sequence with the connecting wire, and connect the measuring wire with the on-site host to form a multi-channel detection network of the roof electrical method;

[0016] S4: Specific measurement: The detection network is powered by multiple frequencies in sequence to complete the roof electrical data collection at different frequencies. Each power supply round completes the data collection of electrical depth sounding, electrical profile, and electrical perspective of the tunnel roof;

[0017] S5: After the detection is completed, the telescopic detection rod is recovered, the locking outer rotating sleeve and the locking inner fixing block are rotated apart, the fixing piece is separated from the telescopic inner rod, the telescopic inner rod is in an active state, the telescopic inner rod is pushed into the telescopic outer rod, and at the same time, the winding reel in the handle is rebounded by the multi-annular spring sheet inside and rotates, and the copper wire of the telescopic inner rod is wound and recovered;

[0018] Furthermore, in step S4, each set of data includes one or more of multiple device data such as a dipole device, a tripole device, a quadrupole device, a dipole device, an axial monopole-dipole device, an equatorial monopole-dipole device, etc.

[0019] Compared with the prior art, the high-efficiency roof detection system and method of use of the mine electrical method of the present invention have the following beneficial effects:

[0020] The present invention adopts an electrode arrangement mode of multiple telescopic detection rods and multi-channel data acquisition technology, which solves the difficulty of rapid and grouped arrangement of roof electrodes, realizes the laying of a multi-channel electrical detection network for the roof, and completes electrical exploration work such as electrical depth sounding, electrical profiling, and electrical perspective of the tunnel roof through one-time wiring, one-time electrode placement, and one round, thereby improving the efficiency of underground geophysical exploration.

[0021] The telescopic detection rod of the present invention is simple to operate and easy to install. The detection electrode can be fixed on the tunnel roof without the need for personnel to perform high-altitude operations, thereby reducing the danger of personnel performing high-altitude operations, eliminating potential safety hazards, and improving the safety of geophysical exploration construction.

[0022] The electrode sponge sleeve of the present invention is dipped in copper sulfate solution to wrap the front end of the electrode, thereby improving the coupling contact between the detection electrode and the roof, weakening the induced polarization effect of the copper electrode, and ensuring stable, accurate and reliable data collection during roof electrical exploration. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 It is a schematic diagram of the installation structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the structure of the telescopic detection rod of the present invention;

[0026] Figure 3 is a cross-sectional view of the copper electrode and the connection terminal of the present invention;

[0027] Figure 4 It is a schematic diagram of the side view structure of the tube twist lock of the present invention;

[0028] Figure 5 It is a schematic diagram of the tube twist lock structure of the present invention;

[0029] Figure 6 It is a schematic diagram of the structure of the internal fixing plate of the grip of the present invention;

[0030] Figure 7 It is a schematic diagram of the winding reel structure of the present invention;

[0031] Figure 8 It is a schematic diagram of the structure of the multi-annular spring sheet of the present invention;

[0032] Fig. 9 It is a schematic diagram of the installation structure of the multi-annular spring sheet and the winding reel of the present invention. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0034] like Figure 1-9An efficient roof detection system for mine electrical method is shown, which is installed in a tunnel 101 and includes a plurality of telescopic detection rods 102, a connecting line 103, a measuring line 104, a field host 105, an infinite cable 106 and an infinite electrode 107. The plurality of telescopic detection rods 102 are arranged at equal intervals in the tunnel 101, and the two ends of each telescopic detection rod 102 are respectively pressed against the roof 108 and the bottom plate 109 of the tunnel 101. The plurality of telescopic detection rods 102 are connected to the measuring line 104 through the connecting line 103, and the measuring line 104 is connected to the field host 105. The field host 105 is connected to the infinite electrode 107 through the infinite cable 106, so as to form a multi-channel detection network for roof electrical method. The field host 105 has The multi-channel data acquisition function can provide power supply functions with multiple power supply frequencies from low frequency to high frequency; the telescopic detection rod 102 includes a sponge cover 1, a copper electrode 2, a connecting end 3, a telescopic inner rod 5, a tube tightening lock 6, a telescopic outer rod 7, a handle 9, and a copper wire 4. The telescopic inner rod 5 and the telescopic outer rod 7 are connected and fixed by the tube tightening lock 6, one end of the connecting end 3 is fixedly connected to the telescopic inner rod 5, and the other end of the connecting end 3 is threadedly connected to the copper electrode 2, the sponge cover 1 is fixed to the front end of the copper electrode 2, the handle 9 is fixed to the end of the telescopic outer rod 7 away from the tube tightening lock 6, the copper wire 4 is arranged inside the telescopic inner rod 5, one end of the copper wire 4 is connected to the copper electrode 2, and the other end is connected to the connecting wire 103.

[0035] In this embodiment, if Figure 2-3 As shown, the connecting terminal 3 is a cylindrical structure with openings at both ends, and a copper base 12 is clamped inside the connecting terminal 3. The copper base 12 includes a front end fixing portion 121 and a terminal connecting portion 122. The front end fixing portion 121 is provided with an internal threaded hole 1211 for connecting the copper electrode 2. The terminal connecting portion 122 is connected to the copper wire 4. The outer diameter of the front end fixing portion 121 is larger than the outer diameter of the terminal connecting portion 122. The front end fixing portion 121 is against the inside of the connecting terminal 3, and the terminal connecting portion 122 extends out of the connecting terminal 3.

[0036] In this embodiment, if Figure 2-3 As shown, a spring 13 is sleeved on the terminal connection portion 122 , one end of the spring 13 abuts against the outer wall of the front end fixing portion 121 , and the other end abuts against the inner wall of the connection end 3 .

[0037] In this embodiment, if Figure 4-5As shown, the tube rotary lock 6 includes a locking outer rotating sleeve 14, a locking inner solid block 15, an extrusion block 16, and a fastening sheet 17. The locking inner solid block 15 is fixed to one end of the telescopic outer rod 7 close to the telescopic inner rod 5. The locking outer rotating sleeve 14 is sleeved on the telescopic inner rod 5. One end of the locking inner solid block 15 close to the locking outer rotating sleeve 14 is provided with a plurality of equally spaced fastening sheets 17. The inner side of the locking outer rotating sleeve 14 is provided with a plurality of equally spaced extrusion blocks 16. The locking outer rotating sleeve 14 and the locking inner solid block 15 are clamped together by the cooperation of the fastening sheets 17 and the extrusion block 16.

[0038] In this embodiment, if Figure 6-9 As shown, the interior of the handle 9 is provided with two fixing plates 10, a winding drum 8, a rotating shaft 18, and an extension wire 11. The two fixing plates 10 are fixed in parallel inside the handle 9, and the two fixing plates 10 are connected by the rotating shaft 18. The winding drum 8 is sandwiched between the two fixing plates 10. A copper inner shaft 19 is arranged inside the rotating shaft 18, and the copper inner shaft 19 is connected to the extension wire 11. The intermediate shaft columns of the rotating shaft 18 and the copper inner shaft 19 are both provided with shaft column slits 21. The exterior of the winding drum 8 is provided with a small shaft column slit 21. It is a circular plastic frame, and a small winding drum gap 20 is left on the plastic frame. The inner side of the winding drum 8 is a multi-annular spring sheet 22, and the two ends of the multi-annular spring sheet 22 are respectively provided with an inner hook 24 and an outer hook 25, the outer hook 23 is fixed in the winding drum gap 20, and the inner hook 24 is fixed in the shaft column gap 21 of the rotating shaft 18 and the copper inner shaft 19. The outside of the winding drum 8 is wound with a copper wire 4, one end of the copper wire 4 is connected to the end of the copper base 12, and the other end is connected to the outer hook 23 of the multi-annular spring sheet 22.

[0039] In this embodiment, if Figure 2-3 As shown, the sponge cover 1 is wrapped around the front end of the copper electrode 2 , and the sponge cover 1 is soaked in a copper sulfate solution; the coupling contact between the copper electrode 2 and the top plate 108 is improved, and the induced polarization effect of the copper electrode 2 is weakened.

[0040] Take a certain working face tunnel as an example. The tunnel section is rectangular, the tunnel height is about 4m, and the tunnel width is about 5m. There are multiple aquifers on the roof of the working face tunnel, and the top bedrock layer is relatively thin, which poses a threat of roof water and sand collapse. In order to find out the water distribution of the coal rock layer on the roof of the tunnel, the high-efficiency roof detection system of the present invention is used for exploration. The construction layout structure is as follows: Figure 1 shown.

[0041] A method for using a high-efficiency roof detection system using a mine electrical method comprises the following steps:

[0042] S1: Lay a measuring line 104 in the detection tunnel 101, and mark the position of the detection point on the top plate 108 of the tunnel 101, arrange an infinity electrode 107 on the bottom plate 109 of the tunnel 101 at a certain distance from the detection area, and connect the infinity electrode 107 to the on-site host 105 with an infinity cable 106;

[0043] S2: Arrange all the telescopic detection rods 102 in the detection lane 101 at one time, the position of the telescopic detection rod 102 corresponds to the detection point marked on the top plate 108, stretch the telescopic detection rod 102, rotate the locking outer rotating sleeve 14, rotate the locking outer rotating sleeve 14 and the locking inner fixing block 15 apart, and the fastening piece 17 is separated from the telescopic inner rod 5. The telescopic inner rod 5 is in an active state, and then the telescopic inner rod 5 is stretched outward, and at the same time, the movement of the copper wire 4 inside the telescopic detection rod 102 and the rotation of the winding reel 8 are driven. The copper wire 4 on the winding reel 8 rotates to The multi-annular spring sheet 22 on the inner side of the winding reel 8 is gradually stretched and compressed. When the telescopic inner rod 5 is pulled out to extend the telescopic detection rod 102 to a suitable length, the locking outer rotating sleeve 14 is screwed in and tightened, the extrusion block 16 squeezes the fastening sheet 17, and the fastening sheet 17 squeezes the telescopic inner rod 5. The telescopic inner rod 5 is in a fastened state. At the same time, the sponge sleeve 1 at the front end of the copper electrode 2 is dipped in copper sulfate solution, and the end of the telescopic detection rod 102 with the copper electrode 2 is pressed against the top plate 108, and the end of the grip 9 is pressed against the bottom plate 109, so that the copper electrode 2 of the telescopic detection rod 102 is well coupled and contacted with the top plate 108;

[0044] S3: Connect the telescopic detection rod 102 in the measuring tunnel 101 and the measuring line 104 in sequence with the connecting line 103, and connect the measuring line 104 to the on-site host 105 to form a roof electrical multi-channel detection network;

[0045] S4: Specific measurement: The detection network is powered by multiple frequencies in sequence to complete the roof electrical data collection at different frequencies. Each power supply round completes the data collection of electrical depth sounding, electrical profile, and electrical perspective of the tunnel roof;

[0046] S5: After the detection is completed, the telescopic detection rod 102 is recovered, the locking outer rotating sleeve 14 and the locking inner fixing block 15 are rotated apart, the fastening sheet 17 is separated from the telescopic inner rod 5, the telescopic inner rod 5 is in an active state, the telescopic inner rod 5 is pushed into the telescopic outer rod 7, and at the same time, the winding reel 8 in the grip 9 is rebounded by the inner multi-annular spring sheet 22 and rotates, and the copper wire 4 of the telescopic inner rod 5 is wound and recovered;

[0047] In this embodiment, in step S4, each set of data includes one or more of multiple device data such as a dipole device, a tripole device, a quadrupole device, a dipole device, an axial monopole-dipole device, an equatorial monopole-dipole device, etc.

[0048] The technical solution of the present invention is not limited to the above-mentioned specific embodiments. All technical variations made according to the technical solution of the present invention fall within the protection scope of the present invention.

Claims

1. A high-efficiency roof detection system for mine electrical method, installed in the tunnel, characterized in that: It includes a plurality of telescopic detection rods, connecting wires, a large measuring wire, a field host, an infinite cable and an infinite electrode. The plurality of telescopic detection rods are arranged at equal intervals in the tunnel. The two ends of each telescopic detection rod are respectively pressed against the roof and the bottom plate of the tunnel. The plurality of telescopic detection rods are connected to the large measuring wire through connecting wires. The large measuring wire is connected to the field host. The field host is connected to the infinite electrode through an infinite cable to form a multi-channel detection network for the roof electrical method. The telescopic detection rod includes a sponge sleeve, a copper electrode, a connecting end, a telescopic inner rod, a tube screw lock, a telescopic outer rod, a grip and a copper wire. The telescopic inner rod and the telescopic outer rod are connected and fixed by a tube screw lock. One end of the connecting end is fixedly connected to the telescopic inner rod, and the other end of the connecting end is threadedly connected to the copper electrode. The sponge sleeve is fixed to the front end of the copper electrode, and the grip is fixed to the end of the telescopic outer rod away from the tube screw lock. The copper wire is arranged inside the telescopic inner rod, and one end of the copper wire is connected to the copper electrode and the other end is connected to the connecting wire. Two fixed plates, a winding drum, a rotating shaft, and an epitaxial wire are arranged inside the handle, the two fixed plates are fixed in parallel inside the handle, the two fixed plates are connected by a rotating shaft, the winding drum is clamped between the two fixed plates, a copper inner shaft is arranged inside the rotating shaft, the copper inner shaft is connected to the epitaxial wire, small shaft column gaps are arranged on the intermediate shaft columns of the rotating shaft and the copper inner shaft, the outside of the winding drum is a circular plastic frame, and a small drum gap is left on the plastic frame, the inside of the winding drum is a multi-annular spring sheet, the two ends of the multi-annular spring sheet are respectively provided with an inner hook and an outer hook, the outer hook is fixed in the small drum gap, the inner hook is fixed in the small shaft column gap of the rotating shaft and the copper inner shaft, the outside of the winding drum is wound with copper wire, one end of the copper wire is connected to the end of the copper base, and the other end is connected to the outer hook of the multi-annular spring sheet.

2. The high-efficiency roof detection system for mine electrical method according to claim 1 is characterized in that: The connecting end is a cylindrical structure with openings at both ends, a copper base is clamped inside the connecting end, the copper base includes a front end fixing portion and a terminal connecting portion, the front end fixing portion is provided with an internal threaded hole for connecting a copper electrode, the terminal connecting portion is connected to a copper wire, the outer diameter of the front end fixing portion is larger than the outer diameter of the terminal connecting portion, the front end fixing portion abuts against the inside of the connecting end, and the terminal connecting portion extends out of the connecting end.

3. The high-efficiency roof detection system for mine electrical method according to claim 2 is characterized in that: A spring is sleeved on the terminal connection part, one end of the spring abuts against the outer wall of the front end fixing part, and the other end abuts against the inner wall of the connection end.

4. The high-efficiency roof detection system for mine electrical method according to claim 1 is characterized in that: The tube rotation lock comprises a locking outer rotating sleeve, a locking inner solid block, an extrusion block and a fastening sheet. The locking inner solid block is fixed to one end of the telescopic outer rod close to the telescopic inner rod, the locking outer rotating sleeve is sleeved on the telescopic inner rod, one end of the locking inner solid block close to the locking outer rotating sleeve is provided with a plurality of fastening sheets arranged at equal intervals, a plurality of extrusion blocks arranged at equal intervals are provided on the inner side of the locking outer rotating sleeve, and the locking outer rotating sleeve and the locking inner solid block are clamped together by the cooperation of the fastening sheet and the extrusion block.

5. The high-efficiency roof detection system for mine electrical method according to claim 1 is characterized in that: The sponge sleeve is wrapped around the front end of the copper electrode, and the sponge sleeve is soaked in copper sulfate solution.

6. A method for using the high-efficiency roof detection system for mine electrical method as claimed in claim 5, comprising the following steps: S1: Lay a large measuring line in the detection tunnel, calibrate the position of the detection point on the tunnel roof, arrange an infinity electrode on the tunnel floor at a certain distance from the detection area, and connect the infinity electrode to the on-site host with an infinity cable; S2: Arrange all telescopic detection rods in the detection lane at one time, the position of the telescopic detection rod corresponds to the detection point calibrated on the roof, stretch the telescopic detection rod, rotate the locking outer rotating sleeve, rotate the locking outer rotating sleeve and the locking inner fixed block, the fastening sheet detaches from the telescopic inner rod, the telescopic inner rod is in an active state, and then stretch the telescopic inner rod outward, while driving the movement of the copper wire inside the telescopic detection rod and the rotation of the winding reel. The copper wire on the winding reel extends outward as the winding reel rotates, and the multi-annular spring sheet inside the winding reel gradually stretches and compresses. When the telescopic detection rod is pulled out to extend to an appropriate length, the locking outer rotating sleeve is screwed in and tightened, the extrusion block squeezes the fastening sheet, and the fastening sheet squeezes the telescopic inner rod. The telescopic inner rod is in a fastened state. At the same time, the sponge sleeve at the front end of the copper electrode is dipped in copper sulfate solution, and the end of the telescopic detection rod with the copper electrode is pressed against the roof, and the end of the handle is pressed against the bottom plate, so that the copper electrode of the telescopic detection rod is well coupled and contacted with the roof; S3: Connect the telescopic detection rod in the measuring tunnel with the measuring wire in sequence with the connecting wire, and connect the measuring wire with the on-site host to form a multi-channel detection network of the roof electrical method; S4: Specific measurement: The detection network is powered by multiple frequencies in sequence to complete the roof electrical data collection at different frequencies. Each power supply round completes the data collection of electrical depth sounding, electrical profile, and electrical perspective of the tunnel roof; S5: After the detection is completed, the telescopic detection rod is recovered, the locking outer rotating sleeve and the locking inner fixing block are rotated apart, the fastening sheet is separated from the telescopic inner rod, the telescopic inner rod is in an active state, the telescopic inner rod is pushed into the telescopic outer rod, and at the same time, the winding reel in the handle is rebounded by the multi-annular spring sheet on the inner side and rotates, and the copper wire of the telescopic inner rod is wound and recovered.

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