Device for resisting dynamic water interference in two-zone detection drill hole

Abstract

The utility model discloses a device for resisting dynamic water interference in a two-zone detection drill hole, which belongs to the field of two-zone detection of drill holes and comprises an umbrella-shaped framework sleeved on a camera, the front part of the umbrella-shaped framework is small, the rear part of the umbrella-shaped framework is large, and the front end of the umbrella-shaped framework is provided with a hoop which is convenient to adjust and used for being fixed with the camera. A reversely-arranged foot warping part is arranged behind the umbrella-shaped framework, a rubber shell for draining water is arranged on the outer side of the umbrella-shaped framework, and the foot warping part is provided with a waterproof shell which expands reversely and is used for retaining water. The device is simple in structure and convenient to use, it can be guaranteed that rock gaps can be clearly observed when the device is installed on a camera, and meanwhile the situation of wall clamping can be avoided.

Description

Technical Field

[0001] This utility model relates to a device for resisting dynamic water interference in boreholes with two-zone detection, belonging to the field of borehole two-zone detection. Background Technology

[0002] Coal mining disrupts the original stress field of the rock mass, causing changes in the stress between the surrounding rock and the goaf, eventually leading to a new equilibrium. However, the failure of the overburden varies under different geological and mining conditions. Therefore, understanding the characteristics and distribution patterns of overburden failure is crucial for preventing water inrush and ensuring coal mine production safety. However, overburden failure is an extremely complex process, requiring researchers to utilize various technical methods. Two-zone borehole detection is one such technique for observing overburden failure. By drilling into the goaf, a detection camera is inserted into the borehole to observe the development of fractures. This technique is characterized by its simple equipment, minimal construction work, and accurate and reliable observation results. Therefore, accurate observations from two-zone borehole detection are essential for research.

[0003] During borehole exploration in both the borehole and strata zones, situations often arise where water-bearing formations fracture and large amounts of water seep from the borehole wall, leading to poor exploration results or even failure to detect the water. Current equipment can only handle situations with small water volumes and can become stuck in the borehole wall, preventing the exploration camera from descending properly. Therefore, the data from these two-zone explorations is incomplete and contains errors, making it impossible to summarize the patterns of overburden failure.

[0004] The prior art disclosed in CN 215520853 U describes a coal mine borehole inspection device that is detachably connected to one end of the inspection probe. A depth sounder is electrically connected to the side of the inspection probe away from the push rod via a wire. One side of the depth sounder is electrically connected to an imaging host via a wire, and one side of the imaging host is electrically connected to a computer via a wire. A camera is fixedly connected inside the inspection probe. A ring-shaped heating element is fixedly connected to the outer side of the inspection probe near the camera. A lighting lamp is fixedly connected to the outer side of the inspection probe away from the ring-shaped heating element. A ring-shaped fixing plate is fixedly connected to the outer side of the inspection probe away from the lighting lamp. An anti-collision component is provided on the outer side of the inspection probe to protect it. However, this device can only handle lens fogging caused by temperature changes and cannot effectively isolate large amounts of dynamic water. Even if the camera itself is waterproof, it is difficult to obtain clear image information when dynamic water is flowing out. Utility Model Content

[0005] To address the shortcomings of existing technologies, a device is provided that is simple in structure and easy to use. Based on the interference of dynamic water on the two-zone detection of boreholes, a similar umbrella-shaped waterproof device of basically the same size as the borehole is used to reduce the interference of dynamic water on the two-zone detection of boreholes and resist the interference of dynamic water inside the borehole.

[0006] To achieve the above-mentioned technology, this utility model provides a device for resisting dynamic water interference in a two-belt detection borehole. It includes an umbrella-shaped frame structure with an opening in the middle, fitted in front of a camera. The frame is composed of multiple inclined metal rods arranged around a circumference. The frame includes a support section that is smaller at the front and larger at the back. The front section of the support section has a retractable section for matching and installing with the camera. Above the retractable section is a connecting section. A clamp is provided on the outside of the connecting section to secure it to the outside of the camera. Near the rear end of the metal rods of the support section, there is a retractable, outwardly flared, arc-shaped raised foot section. A waterproof outer shell with a reverse opening is attached to the raised foot section to block incoming water. A rubber shell is provided between the retractable section and the raised foot section of the support section. A water-guiding section is located between the raised foot section and the lowest point of the support section, and a rubber baffle is provided on the water-guiding section.

[0007] Furthermore, the rubber shell is made of vulcanized rubber and covers the frame support part. The horizontal angle between the rubber shell and the camera is 18°.

[0008] Furthermore, the frame members are made of aluminum alloy or stainless steel, and the retractable part of the frame is equipped with a retractable mechanism to adjust the size of the opening on the top of the frame so as to facilitate installation on cameras of different sizes. It is connected to the clamp through the frame connecting part.

[0009] Furthermore, the waterproof outer shell is made of polyethylene, the angle between the raised part of the skeleton and the supporting part of the skeleton is 54°, the outer part of the waterproof outer shell needs to be smaller than the drilling size, and the inner part of the waterproof outer shell has an outwardly expanding arc structure.

[0010] Furthermore, the horizontal length of the water-guiding section is less than the horizontal length of the waterproof outer shell, which can play a secondary water-guiding role without affecting the anti-jamming function of the waterproof outer shell. The rubber baffle is made of fluororubber.

[0011] Furthermore, taking the borehole diameter as D, the inclined length of the skeleton support part as 0.262D2-8.09, taking the intersection of the skeleton protruding foot part and the skeleton support part as the reference point, the reference point is 0.01D away from the borehole wall, and the arc length of the outward expansion arc structure of the protruding foot part is 0.272552D.

[0012] Beneficial Effects: This invention addresses the difficulty of accurately observing the development of fractures in rock strata using borehole cameras during borehole exploration under dynamic water interference. It incorporates an umbrella-shaped frame device with raised feet and an internal baffle on the borehole camera. The frame has intersecting outer shells, with the rubber shell forming an 18° angle with the camera, ensuring good resistance to dynamic water interference even under high water pressure. Simultaneously, the raised feet form a 54° angle with the frame support, preventing the camera from getting stuck in the rock and further enhancing its resistance to dynamic water interference. This device is simple in structure, easy to use, and reduces the interference of dynamic water during borehole exploration, preventing it from getting stuck in rock fractures. It solves the problems of dynamic water interference and the camera getting stuck in fractures during descent after adding the device. Attached Figure Description

[0013] Figure 1 This is a perspective view of the two-band detection borehole device for resisting dynamic water interference according to this utility model.

[0014] Figure 2 This is a cross-sectional view of the dual-belt detection borehole device for resisting dynamic water interference according to this utility model.

[0015] Figure 3 This is a schematic diagram of the device for resisting dynamic water interference in boreholes using two-band detection.

[0016] Figure 4 This is a schematic diagram of the skeleton of this utility model.

[0017] In the diagram: 1-Clamping hoop, 2-Skeleton retraction section, 3-Skeleton connection section, 4-Skeleton support section, 5-Rubber outer shell, 6-Waterproof outer shell, 7-Skeleton raised foot section, 8-Water guiding section, 9-Rubber baffle. Detailed Implementation Plan

[0018] The present invention will now be described in detail with reference to the accompanying drawings, and the technical solution of the present invention will be clearly and completely described.

[0019] like Figure 1 and Figure 3 As shown, this utility model provides a device for resisting dynamic water interference inside a two-belt detection borehole, which includes a rubber shell 5 and a frame. The rubber shell 5 covers the frame support portion 4. A clamp 1 is fitted around the outer ring of the frame contraction portion 2. The clamp 1 is connected to the frame connection portion 3. The rear of the frame support portion 4 is designed with a frame protruding foot portion 7 to support the waterproof shell 6, and the waterproof shell 6 is attached to the frame protruding foot portion 7. The end of the support portion is designed with a frame water guiding portion 8, covered with a rubber baffle 9.

[0020] The rubber outer shell is made of vulcanized rubber, such as Figure 2As shown, the rubber shell 5 covers the frame support part 4, and the angle between the rubber shell 5 and the camera is 18°, enabling the device to maintain good resistance to dynamic water interference even under high water pressure. The waterproof shell 6 is made of polyethylene and is attached to the frame's raised foot part 7. Calculations show that the angle between the frame's raised foot part 7 and the frame support part 4 is designed to be 54°, ensuring the effect of preventing jamming and providing a certain degree of resistance to dynamic water interference. The rubber baffle 9 covers the water-guiding part 8. The rubber baffle 9 is made of fluororubber. The horizontal length of the water-guiding part 8 is slightly less than the horizontal length of the waterproof shell 6, which allows it to provide secondary water guidance without affecting the waterproof shell 6's anti-jamming function.

[0021] During operation, the device is fitted onto the camera, and the clamp 1 is used to tighten the frame connecting part 3, so that the frame connecting part 3 fits and is fixed better to the outside of the camera. When the camera is drilled, if water gushes out, the rubber shell can separate the water. At the same time, the raised foot part 7 and the waterproof shell 6 form a good effect of separating the drilling water.

[0022] like Figure 4 As shown, the entire frame is made of aluminum alloy. The frame retraction part 2 is equipped with a retraction mechanism to adjust the size of the frame opening. The retraction mechanism consists of frame retraction part 2 and frame retraction part 3, enabling it to be installed on cameras of different sizes. Let the drill hole diameter be D, the inclined length of the frame support part 4 be 0.262D² - 8.09, and the intersection of the frame protrusion part 7 and the frame support part 4 be taken as the reference point. The reference point is 0.01D away from the hole wall, and the arc length of the protrusion part 7 is 0.272552D.

Claims

1. A device for resisting dynamic water interference in a borehole with two detection bands, characterized in that: The frame includes an umbrella-shaped structure frame that is fitted in front of the camera and has an opening in the middle. The frame is composed of multiple inclined metal rods arranged around the perimeter. The frame includes a frame support part (4) that is smaller in the front and larger in the back. The front section of the frame support part (4) is provided with a frame retraction part (2) for matching and installing with the camera. Above the frame retraction part (2) is a frame connecting part (3). The outer side of the frame connecting part (3) is provided with a clamp (1) to secure the frame connecting part (3) to the outer side of the camera. The metal rods of the frame support part (4) have an outwardly flared arc-shaped frame protruding foot part (7) near the rear end. The frame protruding foot part (7) is attached with a waterproof shell (6) with a reverse opening to block incoming water. The frame support part (4) has a rubber shell (5) between the frame retraction part (2) and the frame protruding foot part (7). The section between the frame protruding foot part (7) and the bottom of the frame support part (4) is a water guiding part (8). The water guiding part (8) is covered with a rubber baffle (9).

2. The device for resisting dynamic water interference in a two-band detection borehole according to claim 1, characterized in that: The rubber shell (5) is made of vulcanized rubber and covers the frame support part (4). The horizontal angle between the rubber shell (5) and the camera is 18°.

3. The device for resisting dynamic water interference in a two-band detection borehole according to claim 1, characterized in that: The frame members are made of aluminum alloy or stainless steel. The frame retraction part (2) is equipped with a retraction mechanism that adjusts the size of the opening above the frame to facilitate installation on cameras of different sizes. It is connected to the clamp (1) through the frame connecting part (3).

4. The device for resisting dynamic water interference in a two-band detection borehole according to claim 1, characterized in that: The waterproof shell (6) is made of polyethylene. The angle between the raised part (7) of the skeleton and the support part (4) of the skeleton is 54°. The outside of the waterproof shell (6) needs to be smaller than the drilling size. The inside of the waterproof shell (6) is an outwardly expanding arc structure.

5. The device for resisting dynamic water interference in a two-band detection borehole according to claim 1, characterized in that: The horizontal length of the water-guiding part (8) is less than that of the waterproof shell (6), which can play a secondary water-guiding role without affecting the waterproof shell (6)'s anti-jamming function. The rubber baffle (9) is made of fluororubber.

6. The device for resisting dynamic water interference in a two-band detection borehole according to claim 1, characterized in that: Take the borehole diameter as D, the inclined length of the skeleton support part (4) is 0.262D2-8.09, take the intersection of the skeleton protruding part (7) and the skeleton support part (4) as the reference point, the reference point is 0.01D away from the hole wall, and the arc length of the outward arc structure of the protruding part (7) is 0.272552D.

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