A mine tunneling advanced detection transient electromagnetic instrument overlapping loop mounting device

Abstract

The utility model discloses a kind of mine tunneling advanced detection transient electromagnetic instrument overlapping loop mounting devices, it includes transient electromagnetic instrument, and transient electromagnetic instrument includes square frame and transceiver overlapping loop, and transceiver overlapping loop is wound and fixed in square frame inside, and one side of square frame is symmetrically connected with first hanging rope and second hanging rope respectively at two ends, and the other end of first hanging rope and second hanging rope is connected pull rope, fixed pulley is fixed in mine roadway roof, and pull rope is wound over fixed pulley and fixed;The device is hung in square frame with transceiver overlapping loop fixed by pull rope, first hanging rope, second hanging rope and fixed pulley above mine roadway floor, so that transceiver overlapping loop is far away from mine roadway floor, to avoid mine roadway floor rail and / or water interference on mine roadway floor. In addition to this, the height of transceiver overlapping loop can be adjusted by pull rope.

Description

Technical Field

[0001] This utility model relates to the technical field of mine geological exploration equipment, and in particular to an overlapping loop installation device for a transient electromagnetic instrument for advanced detection in mine tunneling. Background Technology

[0002] In advanced detection during mine tunneling, transient electromagnetic methods are widely used due to their sensitivity to low-resistivity anomalies. The transmit / receive overlapped loop, as a core detection component, directly affects the reliability of the detection data due to its spatial orientation. Currently, the transmit / receive overlapped loop is mostly placed on the mine roadway floor, which has the following technical drawbacks:

[0003] 1. Complex interference factors: Water accumulation on the tunnel floor leads to unstable coupling of the wire frame, and metal components such as metal rails and support I-beams generate electromagnetic interference, affecting the quality of the detection signal.

[0004] 2. Limited attitude adjustment: Traditional wireframes lack height and angle adjustment mechanisms, making it impossible to adjust the detection orientation according to the shape of the tunnel face and geological targets.

[0005] 3. Low operational efficiency: Existing equipment requires multiple people to work together to complete installation and adjustment, and the preparation time for a single detection is long, making it difficult to meet the time requirements of rapid tunneling. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide an overlapping loop installation device for a transient electromagnetic instrument for advanced detection in mining tunneling, so as to at least solve the technical problem that the overlapping loop for transmitting and receiving in existing advanced detection in mining tunneling is easily interfered with.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] An installation device for an overlapping loop of a transient electromagnetic instrument for advanced detection in mine tunneling is provided. It includes a transient electromagnetic instrument, which comprises a square frame and a transceiver overlapping loop. The transceiver overlapping loop is wound around and fixed inside the square frame. A first suspension rope and a second suspension rope are symmetrically connected to both ends of one side of the square frame. The other ends of the first suspension rope and the second suspension rope are connected to a pull rope. A fixed pulley is fixed on the roof of the mine roadway, and the pull rope passes around the fixed pulley and is fixed.

[0009] Furthermore, the fixed pulley is a ratchet self-locking pulley.

[0010] Furthermore, the pull rope is provided with scale values ​​along its length, and the smallest scale value is 1cm.

[0011] Furthermore, the other ends of the first and second suspension ropes are connected to a pull rope via a universal joint with an angle locking mechanism.

[0012] Furthermore, the square frame can be detachably connected via four support rods and four connectors.

[0013] Furthermore, the connector is a four-way connector, the end of the support rod is inserted into one end of the four-way connector, the end of the support rod is provided with a threaded hole vertically, the end of the four-way connector is provided with a through hole corresponding to the threaded hole, and the end of the support rod and the end of the four-way connector are threadedly connected by bolts passing through the through hole and the threaded hole.

[0014] Furthermore, an insulating groove is provided on one side of the support rod along its length direction. The insulating groove is U-shaped on the cross-section of the support rod. The opening of the insulating groove faces the inside of the square frame. Multiple limiting protrusions are evenly spaced on both sides of the insulating groove along its length direction. The limiting protrusions on both sides of the insulating groove are symmetrical. The transmit / receive overlap loop is wound in the insulating grooves of the four support rods and fixed by the limiting protrusions.

[0015] Furthermore, the insulating slot is provided with a fixing clip at its end and in the middle. The fixing clip is U-shaped, and the two ends of the U-shaped fixing clip are respectively provided with connecting ears vertically. The U-shaped fixing clip extends into the insulating slot, and the two connecting ears are respectively connected to the two sides of the insulating slot by bolts.

[0016] Furthermore, the pull cord is made of polyester material with a PVC coating, and the surface of the pull cord is printed with scale values ​​using abrasion-resistant ink.

[0017] The beneficial effects of this utility model are:

[0018] The overlapping loop installation device for the transient electromagnetic instrument used in mine tunneling advance detection proposed in this utility model suspends a square frame with a fixed transmitting and receiving overlapping loop above the mine roadway floor using a pull rope, a first suspension rope, a second suspension rope, and a fixed pulley. This keeps the transmitting and receiving overlapping loop away from the mine roadway floor, thereby avoiding interference from the mine roadway floor rails and / or water accumulation on the mine roadway floor. Furthermore, the height of the transmitting and receiving overlapping loop can be adjusted using the pull rope.

[0019] The pull rope is fixed and adjusted via a ratchet self-locking pulley, making it easy to use.

[0020] By setting a scale value on the pull rope, the height of the overlapping return line can be precisely adjusted according to the scale value.

[0021] By setting up a universal joint with an angle locking mechanism and using a geological compass, precise adjustment of the azimuth and tilt angle of the transmit / receive overlap line can be achieved.

[0022] The square frame can be detached and connected by four support rods and four connectors, facilitating underground transportation.

[0023] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings, wherein:

[0025] Figure 1 This is a schematic diagram of the structure of this utility model.

[0026] Figure 2 for Figure 1 A three-dimensional view of a square frame.

[0027] Figure 3 for Figure 2 Enlarged schematic diagram of part A in the middle.

[0028] In the diagram: 1. Square frame; 2. First suspension rope; 3. Second suspension rope; 4. Pull rope; 5. Fixed pulley; 6. Tunnel floor; 7. Overlapping return line; 8. Universal joint; 9. Connector; 10. Support rod; 12. Screw; 13. Insulating slot; 14. Limiting protrusion; 15. Fixing clamp. Detailed Implementation

[0029] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0030] like Figures 1-3The illustrated mine tunneling advanced detection transient electromagnetic instrument overlapping loop installation device includes a transient electromagnetic instrument, which comprises a square frame 1 and a transceiver overlapping loop 7. The square frame 1 is detachably connected via four support rods 10 and four connectors 9. The support rods 10 are made of T700 grade carbon fiber composite material, with a length of 1-1.5 m, preferably 1.2 m, a diameter of 20 mm, a bending strength ≥1500 MPa, and a single rod weight ≤500 g. Carbon fiber material combines high strength and lightweight advantages, and can withstand the assembly stress during the construction of the square frame 1 and the impact of the complex underground environment. The connectors 9 are made of 45# steel, with a galvanized surface treatment (salt spray resistance ≥500 hours), and their corrosion resistance meets the requirements for use in humid mine environments (service life ≥5 years). There are many structural forms for connector 9. For example, connector 9 can be a four-way connector. The end of support rod 10 is tightly inserted into one end of the four-way connector. The end of support rod 10 has two threaded holes vertically. The end of the four-way connector has through holes corresponding to the two threaded holes. The end of support rod 10 and the end of the four-way connector are connected by two M8 high-strength stainless steel screws 12, which pass through the two through holes and the two threaded holes respectively. Before connection, thread-locking agent is applied to the screws 12. The assembly torque is controlled at 30 N·m to ensure consistent tightness at each connection point. Figure 3 As shown, an insulating groove 13 is bonded to one side of the support rod 10 along its length using epoxy adhesive. Before bonding, the contact surface is polished, and the adhesive is applied to a thickness of 0.3-0.5 mm. After being fixed with a special clamp, it is cured at room temperature for 24 hours to ensure the bonding strength meets long-term usage requirements. The insulating groove 13 is made of polytetrafluoroethylene (surface resistivity ≥10¹²Ω). The insulating groove 13 is U-shaped on the cross-section of the support rod 10, with an opening width of 2.0 mm (suitable for 1.5 mm² return wire diameter) and a depth of 5.0 mm. The opening of the slot 13 faces the inside of the square frame 1. Multiple limiting protrusions 14 (1.0mm high, 1.5mm diameter) are provided on both sides of the insulating slot 13 at 10cm intervals along its length. The limiting protrusions 14 on both sides of the insulating slot 13 are symmetrical. The transmit / receive overlap loop 7 is wound around the insulating slot 13 of the four support rods and fixed by the limiting protrusions 14. Specifically, the transmit / receive overlap loop 7 is inserted into the insulating slot 13 starting from one corner of the square frame 1, fitting against the bottom of the slot and being secured between two limiting protrusions 14 to prevent displacement. During the winding process, nylon cable ties are used for temporary fixation every 30cm. After completion, PTFE insulating clamps 15 are used to further secure the cable at the four corners of the square frame 1 and the midpoint of each support rod 10. Figure 3As shown, the fixing clip 15 is U-shaped, with connecting ears vertically provided at both ends. The U-shaped fixing clip extends into the insulating slot 13 to press the overlapping return cable 7, and the two connecting ears are respectively connected to the two sides of the insulating slot 13 by screws. The screw tightening torque is controlled at 5 N·m. The top two ends of the square frame 1 are symmetrically connected to the first suspension rope 2 and the second suspension rope 3 by rope clips. The distance between the two connection points is 1 / 3 of the length of the top edge. The first suspension rope 2 and the second suspension rope 3 are made of Kevlar fiber, with a diameter of 6 mm, a breaking tensile strength ≥ 5 kN, and a length error controlled within ± 2 mm. The other ends of the first suspension rope 2 and the second suspension rope 3 are connected to a universal joint 8 with an angle locking mechanism. The universal joint 8 with the angle locking mechanism is existing technology, for example, composed of an aluminum alloy ball head and an engineering plastic ball socket. The ball head has a diameter of 20mm and is connected to the other ends of the first suspension rope 2 and the second suspension rope 3. The inner diameter of the ball socket is 22mm, and the clearance between the ball socket and the ball head is 1mm. A damping rubber pad and an angle locking knob are provided on the outside of the ball socket, allowing for 360° rotation adjustment and angle locking. The ball socket is connected to a pull rope 4. The pull rope 4 is made of polyester material with a PVC coating. The surface of the pull rope 4 is printed with centimeter-level scale values ​​using abrasion-resistant ink, with the smallest scale value being 1cm, and the clarity maintained for ≥1000 abrasions. A fixed pulley 5 is installed on the roof of the mine roadway. The fixed pulley 5 is forged from Q235 steel, has a load-bearing capacity of ≥20kg, a wheel diameter of 80mm, and a built-in ratchet locking mechanism. The fixed pulley 5 and the ratchet locking mechanism form a ratchet self-locking pulley with an adjustment step of 1cm and a locking reliability of ≥1000 operations without failure. It is fixed to the stable rock strata of the mine roadway roof using M12 expansion bolts. A rope 4 is routed around the fixed pulley 5.

[0031] Installation and usage procedures for this device:

[0032] 1. Fix the ratchet self-locking pulley to the roof of the roadway 5-8m behind the tunnel face, and tighten it with expansion bolts to ensure a firm installation;

[0033] 2. Assemble four carbon fiber support rods 10 using connectors to form a 1.2m × 1.2m square frame 1, and embed and fix the transceiver overlap loop 7 into the insulating slot 13;

[0034] 3. The first suspension rope 2 and the second suspension rope 3 are symmetrically connected to the top edge of the square frame 1, and the other end is connected to the pull rope 4 after being joined by the universal joint 8. The end of the pull rope 4 passes around the ratchet self-locking pulley.

[0035] 4. Pull the pull rope 4 until the bottom edge of the receiving and dispatching overlap return line 7 is 1.2-1.8m away from the roadway floor. After accurately positioning using the scale value, operate the ratchet self-locking pulley to fix the height. Use a level to calibrate the square frame 1 so that the levelness error is ≤±2°.

[0036] 5. Rotate the square frame 1 to adjust the angle, measure the azimuth and inclination angles to the target values ​​using the geological compass, and tighten the universal joint 8 locking knob to maintain the angle;

[0037] 6. After checking the stability of the device, start the transient electromagnetic instrument to collect data. The data collection time for a single set should be controlled within 5-8 minutes.

[0038] To adjust the height of the square frame 1, pull the rope 4 and use the scale on the rope 4 for precise positioning. To adjust the azimuth and tilt angles of the transceiver overlap line 7, first loosen the angle locking knob of the universal joint 8, then manually rotate the square frame 1 for adjustment. Use a geological compass for angle measurement and positioning, with a measurement accuracy of ±1°. During the rotation of the square frame 1, the universal joint 8 adaptively adjusts with the angle change, and the damping rubber pad provides stable friction. After adjustment, tighten the angle locking knob.

[0039] This installation device has a simple structure, allowing the transceiver overlap line 7 to be suspended, reducing interference. It also allows for easy adjustment of the angle and height, resulting in improved detection accuracy, enhanced interference suppression, and optimized operational efficiency. Installation and adjustment can be completed by a single operator, and the detection signal-to-noise ratio is improved to over 15dB, making it suitable for advanced geological anomaly detection scenarios in mining.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] 1. Improved anti-interference capability: By suspending the overlay loop 7, the interference signal from the track (or water accumulation area) of the roadway floor 6 is reduced by 40-50%, the angle adjustment function reduces lateral metal interference by more than 25%, and the signal-to-noise ratio of the detection data is improved to more than 15dB.

[0042] 2. Precise and flexible attitude adjustment: The height adjustment accuracy of the transmit / receive overlap loop 7 is ±1cm. The azimuth and tilt angles of the transmit / receive overlap loop are accurately measured and adjusted using a geological compass (angle resolution of 1°). The square frame 1 can be placed freely and flexibly.

[0043] 3. Optimized operational efficiency: The device can be installed and adjusted by a single person, and the preparation time for a single detection is reduced to less than 10 minutes, which is 60% more efficient than the traditional method and significantly improves the ease of placement;

[0044] 4. Strong structural adaptability: The carbon fiber square frame 1 weighs ≤3kg, and the detachable design facilitates underground transportation. The connector 9 has corrosion resistance to meet the requirements of humid mine environments (service life ≥5 years).

[0045] It should be noted that the distance between the tunnel roof and the tunnel floor 6 is generally 3-5 meters or 5-10 meters. If an external force is applied to the square frame 1 during measurement, causing the square frame 1 to move, hold the square frame 1 with your hand.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A device for installing an overlapping loop of a transient electromagnetic instrument for advanced detection in mining, comprising a transient electromagnetic instrument, the transient electromagnetic instrument comprising a square frame (1) and a transceiver overlapping loop (7), the transceiver overlapping loop (7) being wound around and fixed inside the square frame (1), characterized in that: The square frame (1) has a first suspension rope (2) and a second suspension rope (3) symmetrically connected at both ends of one side. The other ends of the first suspension rope (2) and the second suspension rope (3) are connected to a pull rope (4). A fixed pulley (5) is fixedly installed on the top plate of the mine roadway. The pull rope (4) passes around the fixed pulley (5) and is fixed.

2. The overlapping loop installation device for a transient electromagnetic instrument for advanced detection in mining tunneling according to claim 1, characterized in that: The fixed pulley (5) is a ratchet self-locking pulley.

3. The overlapping loop installation device for a transient electromagnetic instrument for advanced detection in mining tunneling according to claim 2, characterized in that: The pull rope (4) has a scale value along its length, and the smallest scale value is 1cm.

4. The overlapping loop installation device for a transient electromagnetic instrument for advanced detection in mine tunneling according to claim 1, characterized in that: The other ends of the first suspension rope (2) and the second suspension rope (3) are connected to the pull rope (4) via a universal joint (8) with an angle locking mechanism.

5. The overlapping loop installation device for a transient electromagnetic instrument for advanced detection in mine tunneling according to claim 1, characterized in that: The square frame (1) is detachably connected by four support rods (10) and four connectors (9).

6. The overlapping loop installation device for a transient electromagnetic instrument for advanced detection in mine tunneling according to claim 5, characterized in that: The connector (9) is a four-way connector. The end of the support rod (10) is inserted into one end of the four-way connector. The end of the support rod (10) is provided with a threaded hole vertically. The end of the four-way connector is provided with a through hole corresponding to the threaded hole. The end of the support rod (10) and the end of the four-way connector are connected by a screw (12) passing through the through hole and the threaded hole.

7. The overlapping loop installation device for a transient electromagnetic instrument for advanced detection in mining tunneling according to claim 5, characterized in that: An insulating slot (13) is provided on one side of the support rod (10) along its length direction. The insulating slot (13) is U-shaped on the cross section of the support rod (10). The opening of the insulating slot (13) faces the inside of the square frame (1). Multiple limiting protrusions (14) are evenly spaced on both sides of the insulating slot (13) along its length direction. The limiting protrusions (14) on both sides of the insulating slot (13) are symmetrical. The transmit / receive overlap loop (7) is wound around the insulating slots (13) of the four support rods (10) and fixed by the limiting protrusions (14).

8. The overlapping loop installation device for a transient electromagnetic instrument for advanced detection in mine tunneling according to claim 7, characterized in that: The insulating slot (13) is provided with a fixing clip (15) at its end and middle respectively. The fixing clip (15) is U-shaped. The two ends of the U-shaped fixing clip (15) are respectively provided with connecting ears vertically. The U-shaped fixing clip (15) extends into the insulating slot (13) and the two connecting ears are respectively connected to the two sides of the insulating slot (13) by bolts.

9. The overlapping loop installation device for a transient electromagnetic instrument for advanced detection in mining tunneling according to any one of claims 1-8, characterized in that: The pull rope (4) is made of polyester material with PVC coating, and the surface of the pull rope (4) is printed with scale values ​​by friction-resistant ink.

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