Device for measuring development degree of blasting crack of high-position rock stratum

Abstract

The utility model relates to the field of underground drilling detection and measurement, in particular to a high-position rock stratum blasting crack development degree measuring device, which is characterized in that a camera is fixed at the top end of a hollow drill rod and is connected with a host through a cable; two receiving transducers and a transmitting transducer are sequentially fixed at the upper part of the hollow drill rod from top to bottom, and the two receiving transducers are connected with the host through a second cable; the end, connected with the camera, the receiving transducer and the transmitting transducer, of the cable is located in the hollow drill rod and then led out from the third lead hole. An upper packer is arranged in the circumferential direction of the first guide hole, a lower packer is arranged in the circumferential direction of the second guide hole, the upper portion of the hydraulic hose is arranged in the hollow drill rod and provided with two liquid outlets, the liquid outlet in the upper portion is communicated with an upper packer cavity, and the liquid outlet in the lower portion is communicated with a lower packer cavity. The drilling imaging system and the acoustic logging system share one hollow drill rod, two tests can be carried out at a time, time and labor are saved, and efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of underground borehole detection and measurement, and specifically to a device for measuring the degree of development of high-level rock strata blasting cracks. The device is suitable for measuring the degree of development of rock mass cracks after blasting in underground high-level rock strata blasting pressure relief technology, and realizes efficient and accurate measurement of the degree of development of high-level rock strata blasting cracks. Background Art

[0002] As the depth of mining of mineral resources increases, the pressure in the mine gradually increases, the contradiction between mining and mine pressure becomes increasingly serious, and impact mine pressure disasters occur frequently. How to control the mine pressure from the source has become a top priority. At present, the prevention and control of impact mine pressure mainly adopts measures such as water injection softening, cutting pressure relief, and local blasting pressure relief. However, the pressure relief area of ​​these measures is small and the pressure relief effect is not ideal. The new technology of high-level rock blasting to form an "artificial pre-crack layer" provides a new direction for the prevention and control of mine pressure. The high-level rock blasting technology can largely control the mine pressure from the source, alleviate the contradiction between mine pressure and mining, and is not affected by the spatial position of the tunnel, and has a good pressure relief effect.

[0003] In order to understand the pressure relief effect after drilling and blasting, that is, to understand the development of cracks around the borehole after drilling and blasting, acoustic wave detection and borehole imaging detection technology are often used for measurement. The two detection methods have their own advantages and disadvantages and can form a certain degree of technical complementarity. However, the detection equipment used by the two detection methods in the prior art is independent, that is, when performing detection, it is necessary to perform acoustic wave detection first and then borehole imaging detection, or to perform borehole imaging detection first and then acoustic wave detection. The detection procedure is complicated, which affects the detection efficiency, and frequent detection is easy to affect the stability of the borehole. Therefore, how to reduce the detection procedures of acoustic wave detection and borehole imaging and simplify the cost of detection equipment is an urgent problem to be solved in this field. Utility Model Content

[0004] In view of the problem that the procedures of acoustic logging and borehole imaging comprehensive detection are complicated and inefficient, the utility model proposes a device for measuring the degree of development of blasting cracks in high-position rock formations, the measuring device comprising a camera, a receiving transducer, a transmitting transducer and a hollow drill pipe; a camera is fixed on the top of the hollow drill pipe, and the camera is connected to a host through a first cable; two receiving transducers and a transmitting transducer are fixed to the upper part of the hollow drill pipe in sequence from top to bottom, the two receiving transducers are connected to the host through a second cable, the transmitting transducer is connected to the host through a third cable, and the third cable connected to the transmitting transducer is provided with a pulse transmitter on the side connected to the host; a plurality of Four lead-in holes are arranged, one of which is located between the camera and the uppermost receiving transducer, which is the first lead-in hole; the other three are located at the bottom of the hollow drill pipe and are arranged at intervals, namely the second lead-in hole, the third lead-in hole and the fourth lead-in hole from top to bottom; one end of the cable connected to the camera, the receiving transducer and the transmitting transducer is located inside the hollow drill pipe, and then led out from the third lead-in hole; an upper packer is arranged circumferentially around the first lead-in hole, and a lower packer is arranged circumferentially around the second lead-in hole, the upper part of the hydraulic hose is arranged inside the hollow drill pipe, and two liquid outlets are arranged, the upper liquid outlet is connected to the upper packer cavity, and the lower liquid outlet is connected to the lower packer cavity, and the hydraulic hose is connected to the hydraulic pump after being led out through the fourth lead-in hole.

[0005] Preferably, one end of the cable connected to the host is stored by a cable drum.

[0006] Preferably, it also includes a water injection assembly, wherein the upper end of the water pipe passes through the lower packer along the axis, the lower end of the water pipe is connected to the water injection pump, and a switch valve and a water injection pump are provided on the side of the water pipe close to the water injection pump.

[0007] Preferably, a sealing ring is further included, and a sealing ring is arranged at the lead-in hole, and the sealing ring is used to seal the gap between the cable and the lead-in hole, and between the hydraulic hose and the lead-in hole.

[0008] Preferably, it also includes an extension drill rod, which is threadedly connected to the bottom end of the hollow drill hole. The extension drill rod includes one or more extension drill rods, and adjacent extension drill rods are detachably connected via a threaded structure.

[0009] The beneficial effects of the utility model are as follows: the utility model ingeniously applies the borehole imaging technology and the acoustic wave measurement technology to the measurement of the degree of development of rock cracks after blasting of high-level rock formations, uses multiple indicators to more comprehensively analyze the degree of development of blasting cracks in high-level rock formations, and the analysis data is more reliable; in the measurement device of the utility model, the borehole imaging system and the acoustic wave logging system share a hollow drill rod, and two tests are performed at one time, which saves time and effort, improves efficiency, and can perform further hydraulic softening. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1This is a schematic diagram of the overall structure of the utility model of a device for measuring the degree of development of high-level rock blasting cracks;

[0011] Figure 2 The utility model is a schematic diagram of the local structure of a device for measuring the degree of development of blasting cracks in high-level rock formations.

[0012] In the figure: 1-camera; 2-upper packer; 3-receiving transducer (receiving probe); 4-transmitting transducer (sounding probe); 5-hollow drill pipe; 6-lower packer; 7-hydraulic hose; 8-hydraulic pump; 9-cable drum; 10-cable; 11-pulse transmitter; 12-host; 13-water pipe; 14-switch valve; 15-flow meter; 16-water injection pump; 17-borehole; 18-high rock formation; 19-blasting gap; 20-tunnel; 21-lead hole; 22-liquid outlet. DETAILED DESCRIPTION

[0013] The device of the utility model is further described in detail below with reference to the accompanying drawings.

[0014] like Figure 1-2 As shown, the utility model provides a device for measuring the development degree of blasting cracks in high-position rock formations, comprising a camera 1, an upper packer 2, a receiving transducer (receiving probe) 3, a transmitting transducer (sounding probe) 4, a hollow drill rod 5, a lower packer 6, a hydraulic hose 7, a hydraulic pump 8, a communication cable 10, a pulse transmitter 11, and a host 12; a camera 1 is fixed to the top of the hollow drill rod 5, the camera 1 is connected to the host 12 through a cable 10 (first cable), and the host 12 includes a display screen; the camera 1, the cable 10 (first cable) and the host 12 constitute a drilling imaging system;

[0015] Two receiving transducers 3 and one transmitting transducer 4 are fixed on the upper part of the hollow drill pipe 5 from top to bottom in sequence, the two receiving transducers 3 are connected to the host 12 through a cable 10 (a second cable), the transmitting transducer 4 is connected to the host 12 through a cable 10 (a third cable), and the cable 10 (the third cable) connected to the transmitting transducer 4 is provided with a pulse transmitter 11 on the side connected to the host 12; the receiving transducer 3, the transmitting transducer 4, the cable 10 (the second cable, the third cable) and the host 12 constitute an acoustic logging system;

[0016] A total of four lead holes 21 are arranged on the side wall of the hollow drill rod 5, one of which is located between the camera 1 and the uppermost receiving transducer 3, and is the first lead hole 21; the other three are located at the bottom of the hollow drill rod 5 and are arranged at intervals, and are the second lead hole 21, the third lead hole 21 and the fourth lead hole 21 from top to bottom; the end of the cable 10 connected to the camera 1, the receiving transducer 3, and the transmitting transducer 4 is located inside the hollow drill rod 5, and then led out from the third lead hole 21, and the end of the cable 10 connected to the main machine 12 is received by the cable drum 9; an upper packer 2 is arranged circumferentially around the first lead hole 21, and a lower packer 6 is arranged circumferentially around the second lead hole 21, the upper part of the hydraulic hose 7 is arranged inside the hollow drill rod 5, and two liquid outlets 22 are arranged, the upper liquid outlet 22 is connected to the cavity of the upper packer 2, and the lower liquid outlet 22 is connected to the cavity of the lower packer 6, and the hydraulic hose 7 is connected to the hydraulic pump 8 after being led out through the fourth lead hole 21.

[0017] As a further limitation of this embodiment, it also includes a water injection component, which includes a water pipe 13, a switch valve 14, a flow meter 15 and a water injection pump 16; the upper end of the water pipe 13 passes through the lower packer 6 along the axis, and the lower end of the water pipe 13 is connected to the water injection pump 16. The switch valve 14 and the water injection pump 16 are provided on the side of the water pipe 13 close to the water injection pump 16.

[0018] It should be noted that the main engine 12 of the borehole imaging system and the main engine 12 of the acoustic logging system can be set separately, that is, the entire high-level rock blasting crack development degree measuring device includes two main engines 12 (only one is shown in the figure); of course, the main engine 12 of the borehole imaging system and the main engine 12 of the acoustic logging system can also share one.

[0019] As a further limitation of this embodiment, a sealing ring is further included. A sealing ring is provided at the lead hole 21 , and the sealing ring is used to seal the gap between the cable 10 , the hydraulic hose 7 and the lead hole 21 .

[0020] As a further limitation of this embodiment, it also includes an extended drill rod, which is threadedly connected to the bottom end of the hollow borehole 5. The extended drill rod can extend the length of the entire drill rod for drilling detection at a greater depth. The extended drill rod includes one or more, and adjacent extended drill rods are detachably connected via a threaded structure.

[0021] The method of using the utility model is as follows: a. constructing a borehole 17 from the tunnel 20 to the high rock layer 18, charging explosives into the borehole 17, blasting and cracking the high rock layer 18, and forming a blasting crack 19 in the high rock layer 18;

[0022] b. Assemble the measuring device of the utility model;

[0023] c. Using the hollow borehole 5 (and the extended drill rod), the camera 1 is gradually delivered from the opening of the borehole 17 to the vicinity of the bottom of the hole, and the image data of the development degree of the borehole fissure is obtained through the camera 1. The image data can be stored in the host 12, and the display screen can display the image or video taken by the camera during the measurement process; the borehole imaging detection is completed;

[0024] d. Use the hydraulic pump 8 to inject hydraulic oil into the cavities of the upper packer 2 and the lower packer 6, and the upper packer 2 and the lower packer 6 are set to block the wall of the borehole 17; use the water injection pump 16 to inject water into the borehole 17 between the upper packer 2 and the lower packer 6, and use the receiving transducer 3 and the transmitting transducer 4 to perform acoustic logging on the borehole 17; and store the measured data through the host 12 to complete the acoustic logging;

[0025] e. Continue to inject water to further weaken the high rock layer 18 after blasting and further prevent and control rock burst.

[0026] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention is described in detail with reference to the above embodiments, any technician familiar with the technical field should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention and fall within the protection scope of the present invention.

Claims

1. A device for measuring the degree of development of blasting cracks in high-level rock formations, the device comprising a camera, a receiving transducer, a transmitting transducer and a hollow drill rod; characterized in that: A camera is fixed at the top of the hollow drill rod, and the camera is connected to the host through a first cable; two receiving transducers and a transmitting transducer are fixed to the upper part of the hollow drill rod in sequence from top to bottom, the two receiving transducers are connected to the host through a second cable, the transmitting transducer is connected to the host through a third cable, and a pulse transmitter is provided on the side of the third cable connected to the transmitting transducer connected to the host; A total of four lead holes are arranged on the side wall of the hollow drill pipe, one of which is located between the camera and the uppermost receiving transducer, and is the first lead hole; the other three are located at the bottom of the hollow drill pipe and are arranged at intervals, and are the second lead hole, the third lead hole and the fourth lead hole from top to bottom; one end of the cable connected to the camera, the receiving transducer and the transmitting transducer is located inside the hollow drill pipe, and then led out from the third lead hole; an upper packer is arranged circumferentially around the first lead hole, and a lower packer is arranged circumferentially around the second lead hole, the upper part of the hydraulic hose is arranged inside the hollow drill pipe, and two liquid outlets are arranged, the upper liquid outlet is connected to the upper packer cavity, and the lower liquid outlet is connected to the lower packer cavity, and the hydraulic hose is connected to the hydraulic pump after being led out through the fourth lead hole.

2. The device for measuring the degree of development of high-level rock blasting cracks according to claim 1 is characterized in that: The end of the cable connected to the host is stored by the cable drum.

3. The device for measuring the degree of development of high-level rock blasting cracks according to claim 1 is characterized in that: It also includes a water injection assembly, wherein the upper end of the water pipe passes through the lower packer along the axis, the lower end of the water pipe is connected to the water injection pump, and a switch valve and a water injection pump are arranged on the side of the water pipe close to the water injection pump.

4. The device for measuring the degree of development of high-level rock blasting cracks according to claim 1 is characterized in that: It also includes a sealing ring, which is arranged at the lead-in hole and is used to seal the gap between the cable and the lead-in hole and between the hydraulic hose and the lead-in hole.

5. The device for measuring the degree of development of high-level rock blasting cracks according to claim 1 is characterized in that: It also includes an extension drill rod, which is threadedly connected to the bottom end of the hollow drill hole. The extension drill rod includes one or more extension drill rods, and adjacent extension drill rods are detachably connected via a threaded structure.

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