Ultrasonic coal seam thickness detector device
By designing an ultrasonic coal seam thickness detector device integrating ultrasonic detection and electronic gyroscope, the problem of inaccurate measurement when the working surface length is large is solved, and the accurate measurement of coal seam thickness and accurate calculation of geological reserves are achieved. , improves coal mining efficiency and safety.
Patent Information
- Application Number
- CN202421366627.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-17
- Publication Date
- 2025-02-18
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Traditional ultrasonic coal seam thickness detectors have inaccurate measurement problems in the comprehensive mining working surface, especially when the working surface length is large, the thickness of the coal seam changes greatly, resulting in inaccurate calculation of geological reserves and cutting by the coal miner. Insufficient height or super high can easily lead to resource losses and equipment damage.
An ultrasonic coal seam thickness detector device was designed, including a carbon push rod joint, an ultrasonic detector main unit, an electronic gyroscope and a plastic pipe rod body. The thickness of the coal seam is measured by an ultrasonic probe, and the drilling trajectory is measured in combination with an electronic gyroscope to achieve the following Accurate collection and analysis of geological information such as coal seam thickness in the working face direction.
The device can accurately measure the thickness of the coal seam when the working surface is large, improve the accuracy of geological reserve calculation, reduce the risk of insufficient or super high cutting height of the coal miner, and improve coal mining efficiency and safety.
Smart Images
Figure CN222501709U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of geological exploration, in particular to an ultrasonic coal seam thickness detector device. Background Art
[0002] Ultrasonic waves can pass through coal seams and bounce back. By measuring data such as the time and intensity of the bounce back, the depth and thickness of the coal seams can be analyzed. This technology can help coal miners accurately understand the distribution and morphology of coal seams, predict the probability of geological disasters, and help improve the safety of coal mines.
[0003] However, traditional detectors have the following disadvantages:
[0004] (1) The fully mechanized mining face is surrounded by two drifts and a cut hole. The length of the mining face is between 80m and 450m, and the maximum length of the drift can be about 12,000m. The thickness of the coal seam can only be determined by the coal rock exposed by the two tunnels. For a face with a longer working face, the thickness of the coal seam varies greatly. It is inaccurate to calculate the geological reserves of the coal seam by measuring the coal seam thickness using only the drift;
[0005] (2) With the need for intelligent comprehensive mining, the establishment of a transparent working face requires accurate coal seam thickness and accurate determination of the position of the coal seam roof and floor. Coal mining machines need to prejudge the thickness of the coal seam before cutting coal. Using the average height of the coal seam can easily lead to insufficient or excessive cutting height of the coal mining machine, resulting in loss of coal resources due to under-digging, resulting in broken roof, and over-digging making it difficult for the coal mining machine to cut, which can easily damage the pick and equipment. Utility Model Content
[0006] The purpose of the utility model is to provide an ultrasonic coal seam thickness detector device to solve the problem proposed in the above background technology that the comprehensive mining working face is surrounded by two drifts and a cutting eye to form a recovery working face, the length of the recovery working face is between 80m and 450m, the maximum length of the drift can be about 12,000m, the thickness of the coal seam can only be determined by the coal rock exposed by the excavation of the two tunnels, for the working face with a longer working face, the thickness of the coal seam varies greatly, and it is inaccurate to calculate the geological reserves of the coal seam by measuring the coal seam thickness by the drift alone; along with the need for intelligent comprehensive mining, the establishment of a transparent working face requires accurate coal seam thickness and accurate determination of the position of the coal seam roof and floor; the coal mining machine needs to judge the coal seam thickness in advance when cutting coal, and the use of the average height of the coal seam is likely to cause the coal mining machine to cut insufficient or excessive height, under-digging to lose coal resources, resulting in roof breakage, over-digging causing coal mining machine cutting difficulties, and easy damage to the pick and equipment.
[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an ultrasonic coal seam thickness detector device, including a carbon push rod joint, a carbon push rod is installed at one end of the carbon push rod joint, a plastic tube rod body is threadedly connected to one end of the carbon push rod, an ultrasonic detector host is arranged at the other end of the carbon push rod joint, a water injection hose is arranged on one side of the carbon push rod, a drainage port is opened in the middle of one end of the plastic tube rod body, an ultrasonic probe is fixedly installed at one end of the plastic tube rod body, an electronic gyroscope located on one side of the ultrasonic probe is glued and connected to the plastic tube rod body, a centering copper bar is wound and connected to the middle of the plastic tube rod body, a number of steel pipe flexible water retaining rings are sleeved on the surface of the plastic tube rod body, a cable connector is installed at the end of the carbon push rod away from the carbon push rod joint, and a water injection connector is arranged on one side of the cable connector.
[0008] Preferably, the ultrasonic probe includes an annular bearing, an upper probe and a lower probe, the top of the annular bearing is rotatably connected to the bottom end of the upper probe, the bottom end of the annular bearing is rotatably connected to the top of the lower probe, and a counterweight body is sleeved on both sides of the connection between the annular bearing and the lower probe. The upper probe consists of an ultrasonic transmitter and a receiver, and the lower probe consists of an ultrasonic generator and a receiver. The generator generates high-frequency ultrasonic waves, and the receiver receives echoes reflected from the interface.
[0009] Preferably, the inner side of the annular bearing is fixedly connected to the plastic tube rod body, and the ultrasonic probe is mounted on the plastic tube rod body through the annular bearing.
[0010] Preferably, the surface of the ultrasonic probe is connected to an ultrasonic cable, the surface of the electronic gyroscope is connected to an electronic gyroscope cable, the electronic gyroscope cable and the ultrasonic cable are both connected to a cable connector, the connection between the cable connector and the electronic gyroscope cable and the connection between the cable connector and the ultrasonic cable are both covered with sealing rubber pads, one end of the cable connector is connected to the ultrasonic cable and the electronic gyroscope cable, and after connection, the front section of the connector is sealed with silicone gel filling and the cable connector is fixed at the same time.
[0011] Preferably, the other end of the cable connector is connected to a communication cable, and the cable connector is connected to the ultrasonic detector host through the communication cable. The ultrasonic detector mainly includes a communication cable and an ultrasonic detection host. One end of the communication cable is connected to the cable connector at the tail of the plastic tube, and the other end is connected to the ultrasonic detector host. The ultrasonic detector host can simultaneously collect ultrasonic data and electronic gyroscope data.
[0012] Preferably, one end of the water injection joint is threadedly connected to one end of the water injection hose, and the water injection joint is an external thread and is threadedly connected to the water injection hose.
[0013] Preferably, a water volume regulating valve is fixedly installed in the middle of the water injection hose, and one end of the water volume regulating valve away from the water injection hose is fixedly connected to a static pressure water pipe. Water in the static pressure water pipe is injected into the water injection hose, and the water volume regulating valve controls the water volume in the water injection hose in real time. The water injection hose section includes a hose with a pressure bearing capacity of 5Mpa and a water volume regulating valve. One end of the hose is connected to the water injection joint at the tail of the plastic tube, and the other end is connected to the water volume regulating valve outside the hole. The other end of the regulating valve is connected to the static pressure water pipe in the alley through a hose.
[0014] Compared with the prior art, the beneficial effects of the utility model are:
[0015] (1) An electronic compass and an ultrasonic thickness tester are installed in a plastic tube. The electronic compass measures the trajectory of the borehole, and the ultrasonic wave tests the coal seam thickness in the vertical direction of the upper and lower parts of the borehole through echoes. The data of both are collected simultaneously, analyzed and calculated together to form geological information such as the coal seam thickness along the working face direction;
[0016] (2) Stable and reliable clean water coupling agent water cavity. A flexible water retaining ring is installed at the tail of the plastic pipe. The flexible water retaining ring is arranged in three rows at intervals. The water retaining ring is hollow. Before the external high-pressure water is injected into the plastic pipe to fill the cavity between the borehole and the water retaining ring, the high-pressure water first props up the water retaining ring, and the water retaining ring is tightly attached to the borehole wall to form a seal for the borehole. Clean water is continuously injected until a dense water cavity is formed. When the plastic pipe is pushed, if a small stone appears or the borehole is deformed and the pipe is stuck, the water inlet is closed, and the flexible retaining ring automatically and slowly releases the pressure to increase the activity gap to ensure that the equipment can continue to be pushed in or pulled out;
[0017] (3) The ultrasonic probe is installed in a ring that can rotate around the center line of the plastic tube. The lower counterweight method is used to ensure that the upper and lower probes are always located in the vertical plane, ensuring that the ultrasonic emission is located in the plumb plane direction;
[0018] (4) Three-point centering on a circle: three 5mm-wide centering copper bars are arranged along the direction of the plastic tube. The angle between the copper bars is 120 degrees. The copper bars are located in the middle of the plastic tube. This can not only center the plastic tube in the middle of the drill hole, but also prevent the flexible retaining ring from being subjected to eccentric force. The two work together to achieve centering of the plastic tube.
[0019] (5) Lightweight and high-strength carbon fiber push rod. Underground operations are limited by tunnel space. Iron rods are too heavy to carry. Aluminum rods have low strength and are prone to cracking at the interface. High-strength carbon drill rods are light in weight and high in strength. They have less friction in horizontal drilling and are easy to push forward. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a side view of the utility model;
[0021] Figure 2It is a side view of the ultrasonic probe of the utility model;
[0022] Figure 3 It is a side view of the centering copper strip of the utility model.
[0023] In the figure: 1. Ultrasonic detector main unit; 2. Communication cable; 3. Water injection hose; 4. Water volume regulating valve; 5. Static pressure water pipe; 6. Plastic pipe rod; 7. Ultrasonic probe; 71. Ring bearing; 72. Upper probe; 73. Lower probe; 74. Counterweight body; 8. Electronic gyroscope; 9. Centering copper bar; 10. Flexible water retaining ring; 11. Sealing rubber pad; 12. Carbon push rod; 13. Carbon push rod joint; 14. Water injection joint; 15. Cable joint; 16. Drain outlet. DETAILED DESCRIPTION
[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0025] See also Figure 1-3 The utility model provides an ultrasonic coal seam thickness detector device, including a carbon push rod joint 13, a carbon push rod 12 is installed at one end of the carbon push rod joint 13, a plastic tube rod body 6 is threadedly connected to one end of the carbon push rod 12, an ultrasonic detector host 1 is arranged at the other end of the carbon push rod joint 13, a water injection hose 3 is arranged on one side of the carbon push rod 12, a drainage port 16 is opened in the middle of one end of the plastic tube rod body 6, an ultrasonic probe 7 is fixedly installed at one end of the plastic tube rod body 6, and a plastic tube rod body 6 is attached to one side of the ultrasonic probe 7. An electronic gyroscope 8 is provided, a centering copper bar 9 is wound around the middle of a plastic tube rod body 6, a steel pipe flexible water retaining ring 10 is sleeved on the surface of the plastic tube rod body 6, a cable connector 15 is installed at one end of a carbon push rod 12 away from a carbon push rod joint 13, a water injection joint 14 is provided on one side of the cable joint 15, the plastic tube rod body 6 is a hollow rod body, a copper tube with a thickness of 2 mm is inside the rod body, an inner cavity of the copper tube is communicated with the water injection joint 14 at the tail of the rod, and high-pressure water is injected and discharged from a drain port 16 at the head of the rod body through the inner cavity; an internal thread is left at the tail of the rod to connect the carbon push rod 12.
[0026] The ultrasonic probe 7 comprises an annular bearing 71, an upper probe 72 and a lower probe 73. The top end of the annular bearing 71 is rotatably connected to the bottom end of the upper probe 72, and the bottom end of the annular bearing 71 is rotatably connected to the top end of the lower probe 73. Both sides of the connection between the annular bearing 71 and the lower probe 73 are sleeved with a counterweight body 74. The upper probe 72 is composed of an ultrasonic transmitter and a receiver, and the lower probe 73 is composed of an ultrasonic generator and a receiver. The generator generates high-frequency ultrasonic waves, and the receiver receives echoes reflected from the interface. Counterweight copper blocks are installed on both sides of the lower probe 73. The upper probe 72 and the lower probe 73 are installed on the copper tube in the middle of the plastic tube rod body 6 through the annular bearing 71. The ultrasonic probe 7 can rotate around the center of the plastic tube rod body 6. Under the action of the counterweight, the upper probe 72 and the lower probe 73 are always kept vertical to ensure that the ultrasonic waves generated by the probes are located in the plumb plane direction; the ultrasonic probe cable is connected to the tail cable connector 15 through the inner cavity of the plastic tube rod body 6.
[0027] The inner side of the annular bearing 71 is fixedly connected to the plastic tube rod body 6 , and the ultrasonic probe 7 is installed on the plastic tube rod body 6 through the annular bearing 71 .
[0028] An ultrasonic cable is connected to the surface of the ultrasonic probe 7, and an electronic gyroscope cable is connected to the surface of the electronic gyroscope 8. Both the electronic gyroscope cable and the ultrasonic cable are connected to a cable connector 15. A sealing rubber pad 11 is provided at the connection between the cable connector 15 and the electronic gyroscope cable and at the connection between the cable connector 15 and the ultrasonic cable. One end of the cable connector 15 is connected to the ultrasonic cable and the electronic gyroscope cable. After the connection, the front section of the connector is sealed with silicone gel filling, and the cable connector 15 is fixed at the same time.
[0029] The other end of the cable connector 15 is connected to the communication cable 2, and the cable connector 15 is connected to the ultrasonic detector host 1 through the communication cable 2. The ultrasonic detector mainly includes the communication cable 2 and the ultrasonic detection host 1. One end of the communication cable 2 is connected to the cable connector 15 at the tail of the plastic tube, and the other end is connected to the ultrasonic detector host 1. The ultrasonic detector host 1 can collect ultrasonic data and electronic gyroscope data at the same time.
[0030] One end of the water injection joint 14 is threadedly connected to one end of the water injection hose 3 . The water injection joint 14 is an external thread and is threadedly connected to the water injection hose 3 .
[0031] A water volume regulating valve 4 is fixedly installed in the middle of the water injection hose 3, and one end of the water volume regulating valve 4 away from the water injection hose 3 is fixedly connected to a static pressure water pipe 5. The water in the static pressure water pipe 5 is injected into the water injection hose 3, and the water volume regulating valve 4 controls the water volume in the water injection hose 3 in real time. The water injection hose 3 section includes a hose with a pressure bearing capacity of 5Mpa and a water volume regulating valve. One end of the hose is connected to the water injection joint 14 at the tail of the plastic tube, and the other end is connected to the water volume regulating valve 4 outside the hole. The other end of the regulating valve is connected to the static pressure water pipe 5 in the lane through a hose.
[0032] When the embodiment of the present application is used: a hole is drilled from the drift toward the middle of the intelligent comprehensive mining working face, the diameter of the hole is greater than 75mm, the azimuth of the hole is ahead of the middle of the coal seam in another drift, and the on-site design calculates and determines the drilling azimuth according to the elevation of the hole opening position and the unified position elevation of the opposite drift. The final hole position exceeds one-half of the length of the working face, and downward drilling is used preferentially to form a good water seal environment. Ultrasonic testing requires water as a coupling agent. After the drilling is completed, the hole must be cleaned in time during the withdrawal period. When the coal seam gas pressure, impact ground pressure, and the coal seam are extremely soft, it is not suitable for drilling. , the method is not applicable. Connect the plastic rod body, carbon push rod 12, water injection hose 3, and communication cable 2 in sequence. First, insert the plastic tube rod body 6 into the borehole, adjust the distance between the two ends of the centering copper bar 9, so that the plastic tube rod body 6 is located in the middle of the borehole, screw on the carbon push rod 12 one by one, and slowly push it forward until the plastic tube rod body 6 and its tail hose and communication cable 2 reach the end hole position. Test. After the equipment reaches the end hole position, connect the water volume regulating valve 4 to the water injection hose 3 and the static pressure water pipe 5, connect the ultrasonic detector host 1 to the communication cable 2, and open Ultrasonic detector host 1, preheat for 30 minutes, open the water injection regulating valve, when a small amount of backwater appears at the borehole, you can start collecting, collect one round at an interval of 1m, and collect three times in one round; slowly pull out the rod, the carbon push rod 12 is 1m long, every time it is pulled out 1m, first unscrew a carbon push rod 12, and then manually collect the coal seam thickness once, after the echo data is displayed and normal, continue to collect 2 times, after the three collections are completed, continue to pull out the carbon push rod 12, repeat the above steps, dismantle the equipment, test the next hole, after the single borehole test is completed, store the data, and disconnect. Open the communication cable 2 and the water injection hose 3, move all the equipment to the next borehole, continue to install the equipment and test steps until all the borehole tests are completed, analyze the coal seam thickness, and export the test data. Coal seam thickness = echo time × longitudinal wave velocity × tan (a) / 2. Calculate the thickness of the upper coal seam in the upper borehole and the thickness of the lower coal seam in the borehole respectively. Calculate the roof and top plate elevations of the coal seam at the working face. Calculate the coordinates of the roof and bottom plates of each measuring point based on the borehole electronic compass trajectory, hole mouth coordinates, and the thickness of the top coal and lower coal in the borehole to form the geological information of the coal-rock interface.
[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.
Claims
1. An ultrasonic coal seam thickness detector device, comprising a carbon push rod joint (13), characterized in that: A carbon push rod (12) is installed at one end of the carbon push rod joint (13), and a plastic tube rod body (6) is threadedly connected to one end of the carbon push rod (12). An ultrasonic detector host (1) is provided at the other end of the carbon push rod joint (13). A water injection hose (3) is provided on one side of the carbon push rod (12). A drainage port (16) is provided in the middle of one end of the plastic tube rod body (6). An ultrasonic probe (16) is fixedly installed at one end of the plastic tube rod body (6). 7), an electronic gyroscope (8) located on one side of the ultrasonic probe (7) is glued and connected to the plastic tube rod body (6), a centering copper bar (9) is wound and connected to the middle of the plastic tube rod body (6), a steel pipe flexible water retaining ring (10) is sleeved on the surface of the plastic tube rod body (6), a cable connector (15) is installed at one end of the carbon push rod (12) away from the carbon push rod joint (13), and a water injection joint (14) is provided on one side of the cable joint (15).
2. The ultrasonic coal seam thickness detector device according to claim 1 is characterized in that: The ultrasonic probe (7) comprises an annular bearing (71), an upper probe (72) and a lower probe (73); the top end of the annular bearing (71) is rotatably connected to the bottom end of the upper probe (72); the bottom end of the annular bearing (71) is rotatably connected to the top end of the lower probe (73); and a counterweight body (74) is sleeved on both sides of the connection between the annular bearing (71) and the lower probe (73).
3. The ultrasonic coal seam thickness detector device according to claim 2 is characterized in that: The inner side of the annular bearing (71) is fixedly connected to the plastic tube rod (6).
4. The ultrasonic coal seam thickness detector device according to claim 1, characterized in that: The surface of the ultrasonic probe (7) is connected to an ultrasonic cable, the surface of the electronic gyroscope (8) is connected to an electronic gyroscope cable, the electronic gyroscope cable and the ultrasonic cable are both connected to a cable connector (15), and the connection between the cable connector (15) and the electronic gyroscope cable and the connection between the cable connector (15) and the ultrasonic cable are both sleeved with a sealing rubber pad (11).
5. The ultrasonic coal seam thickness detector device according to claim 1, characterized in that: The other end of the cable connector (15) is connected to a communication cable (2), and the cable connector (15) is connected to the ultrasonic detector host (1) via the communication cable (2).
6. The ultrasonic coal seam thickness detector device according to claim 1, characterized in that: One end of the water injection joint (14) is threadedly connected to one end of the water injection hose (3).
7. The ultrasonic coal seam thickness detector device according to claim 1 is characterized in that: A water volume regulating valve (4) is fixedly installed in the middle of the water injection hose (3), and one end of the water volume regulating valve (4) away from the water injection hose (3) is fixedly connected to a static pressure water pipe (5).