Rescue device and rescue method for underground coal mine tunnel collapse accidents

Abstract

A rescue device and method for underground coal mine tunnel collapse accidents. The device includes a guide drilling mechanism, a transmission connection mechanism, and a rescue channel mechanism. The method comprises the following steps: detecting the inclination of the collapsed accumulation to determine the initial drilling angle; a central guide drill drills along the slope of the collapsed accumulation; an electromagnetic ranging radar performs real-time detection and adjusts the drilling angle to nearly horizontal when a significant electrical difference is detected in the signal; the central guide drill continues drilling along the collapsed accumulation and adjusts the drilling angle to the reverse of the initial drilling angle when the electromagnetic ranging radar detects a significant electrical difference in the signal; a reaming drill expands the aperture, an air-ribbed inflatable membrane pipe enters the expanded aperture, and a film spraying assembly performs spraying; the guide drilling mechanism bypasses the collapsed accumulation to reach the rescue location, the film spraying assembly stops spraying, the air-ribbed inflatable membrane pipe is inflated and deployed, and trapped personnel evacuate from the air-ribbed inflatable membrane pipe. The present invention can improve the rescue efficiency and success rate of underground coal mine tunnel collapse accidents.

Description

Technical Field

[0001] The invention relates to a rescue device and a rescue method for underground coal mine tunnel collapse accidents, belonging to the technical field of underground coal mine drilling and rescue. Background Art

[0002] The occurrence of geological dynamic disasters in coal mines often causes the collapse of the tunnel excavation space. The existing rescue methods often use manpower or excavators to directly clear the collapsed blockage (or excavate the collapsed blockage on a large scale in all directions), and at the same time provide timely support for the excavation space. However, they do not consider the spatial structure above the collapsed blockage and open a new rescue channel to bypass the collapse accident area. As a result, the project volume is huge and the time is long. The rescue is difficult to complete within the golden time, causing great loss of life and property. Summary of the Invention

[0003] In response to the problems existing in the above-mentioned prior art, the present invention provides a rescue device and a rescue method for underground coal mine tunnel collapse accidents. The rescue device and the rescue method are conducive to carrying out rescue work after tunnel collapse, improving rescue efficiency and success rate, and reducing loss of life and property.

[0004] In order to achieve the above-mentioned object, the present invention provides a rescue device for underground coal mine tunnel collapse accidents, comprising a guide drilling mechanism, a transmission connection mechanism and a rescue channel mechanism;

[0005] The guide drilling mechanism includes a central guide drill, a drill rod, a reaming drill, and a thin film spraying assembly; the central guide drill is equipped with an electromagnetic ranging radar, which has the function of transmitting and receiving electromagnetic wave signals while drilling, and detecting the interface between the collapsed accumulation body and the natural caving arch structure with obvious electrical differences; the reaming drill is connected to the central guide drill via the drill rod, the diameter of the reaming drill is larger than that of the central guide drill, and multiple reaming tools are provided at equal intervals along the circumference of its outer wall, and multiple thin film spraying assemblies are installed between adjacent reaming tools;

[0006] The transmission connection mechanism includes a transmission connecting rod and a ball joint structure. The ball joint structure includes an outer shell support. A retainer is provided between the outer shell support and the inner raceway. A plurality of transmission steel balls are installed in the retainer. The transmission steel balls are in rolling engagement with the outer shell support and the inner raceway. One end of the transmission connecting rod is connected to the reamer, and the other end is connected to the inner raceway.

[0007] The rescue channel mechanism includes an air-ribbed inflatable membrane pipe, one end of which is connected to the guide drilling mechanism through a transmission connection mechanism; a liquid supply passage and an air supply passage are provided in the air-ribbed inflatable membrane pipe, and the liquid supply passage and the air supply passage both pass through the transmission connection mechanism and the guide drilling mechanism, and are respectively used to provide spraying slurry and air to the thin film spraying assembly and the air-ribbed inflatable membrane pipe.

[0008] Furthermore, the air-ribbed inflatable membrane pipe is provided with flexible reinforcing ribs, and the flexible reinforcing ribs are fitted on the surface of the air-ribbed inflatable membrane pipe.

[0009] Furthermore, the thin film spraying assembly includes a mounting seat, a support frame, a boosting chamber, a liquid inlet pipe and a spray head; the mounting seat is fixed on the reamer body, and a support frame is provided on the mounting seat, in which the boosting chamber and the liquid inlet pipe are sealed and installed, and the spray head is installed on the exposed part of the top of the support frame, and the boosting chamber is used to connect the spray head and one end of the liquid inlet pipe, and the other end of the liquid inlet pipe is connected to the liquid supply passage.

[0010] A rescue method for a rescue device for a coal mine tunnel collapse accident, comprising the following steps:

[0011] S1. Use a slope meter to detect the inclination of the collapsed deposit and determine the initial drilling angle of the central guide drill based on the measurement results;

[0012] S2. Install the guide drilling mechanism, transmission connection mechanism, and rescue channel mechanism in sequence from front to back, and start the central guide drill to drill along the slope of the collapsed deposit at the initial drilling angle determined in S1;

[0013] S3. The electromagnetic ranging radar transmits electromagnetic wave signals in real time to the front of the drill and receives reflected signals during the drilling process. When the central pilot drill approaches the first inflection point of the collapsed deposit, the electromagnetic ranging radar detects a significant electrical difference in the reflected signal, and the central pilot drill automatically adjusts the drilling angle to near horizontal.

[0014] S4: The central pilot drill continues drilling along the upper horizontal section of the collapsed accumulation until it approaches the second inflection point. When the electromagnetic ranging radar again detects a significant electrical difference in the reflected signal, the central pilot drill automatically adjusts the drilling angle to the reverse of the initial drilling angle, i.e., the drilling trajectory continues drilling along the boundary between the caving arch and the accumulation.

[0015] S5. Under the guidance of the central guide drill, the reaming drill enters the drilled hole along the same trajectory. Through the rotation and feeding action of the reaming drill, the reaming tool continuously cuts and gradually expands the hole diameter. The air-ribbed inflatable membrane pipe then enters the expanded hole diameter. At the same time, the thin film spraying component sprays the collapsed accumulation in the drilled space and the surface of the fallen arch above the accumulation, forming a spray soft film with a temporary support effect.

[0016] S6. After the directional drilling mechanism bypasses the collapsed accumulation body and arrives at the rescue location, the film spraying assembly stops spraying, and the air-ribbed inflatable membrane pipe is inflated and expanded through the air supply passage, and the flexible reinforcement ribs and the air-ribbed inflatable membrane pipe are gradually fitted and tightened;

[0017] S7. Remove the guide drilling mechanism and the transmission connection mechanism, and the trapped personnel evacuate from the inside of the air-ribbed inflatable membrane pipeline with load-bearing capacity.

[0018] Furthermore, the reaming drill expands the hole diameter to no less than 600mm; the tensile strength of the sprayed soft film formed by the thin film spraying assembly is no less than 30MPa, the thickness of the sprayed soft film is no less than 5mm, and the initial setting time of the sprayed soft film is no more than 60s. The present invention performs high-position directional drilling based on the unique spatial characteristics formed above the collapsed accumulation body, thereby bypassing the collapsed accumulation body and reducing the workload of excavation; the thin film spraying assembly can provide all-round temporary support for the rescue space before the rescue channel is constructed; the rescue channel part uses an air rib inflatable membrane pipeline structure to achieve the rapid formation of a rescue channel after the drilling of the rescue space is completed, and utilizes the unique spatial characteristics of the collapsed accumulation body at a high position to form a rescue channel above the collapsed accumulation body to bypass the collapsed area, which can greatly reduce the operation time of breaking rocks to open a channel and reduce the engineering workload of the support link. It has the advantages of flexible and reliable channels, efficient and fast construction, and simplified support procedures, which is conducive to carrying out rescue work after the tunnel collapse, improves the rescue efficiency and success rate, and reduces the loss of life and property. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the guide drilling mechanism of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the thin film spraying assembly of the present invention;

[0022] Figure 4 It is a structural diagram of the transmission connection mechanism in the present invention;

[0023] Figure 5 It is a schematic diagram of the coordination structure of the rescue channel mechanism and the transmission connection mechanism in the present invention;

[0024] Figure 6 It is a structural diagram of the rescue channel mechanism of the present invention;

[0025] Figure 7 It is a workflow diagram of the method of the present invention.

[0026] In the figure: 1. Guide drilling mechanism, 1-1. Center guide drill, 1-2. Drill rod, 1-3. Reaming drill, 1-4. Thin film spraying assembly, 1-41. Mounting seat, 1-42. Support frame, 1-43. Pressurization chamber, 1-44. Liquid inlet pipe, 1-45. Spraying head; 1-5. Electromagnetic ranging radar, 1-6. Reaming tool; 2. Transmission connection mechanism, 2-1. Transmission connecting rod, 2-2. Housing support, 2-3. Inner raceway, 2-4. Retaining frame, 2-5. Transmission steel ball; 3. Rescue channel mechanism, 3-1. Air rib inflatable membrane pipe, 3-11. Liquid supply passage, 3-12. Air supply passage, 3-13. Flexible reinforcement rib; 4. Collapsed accumulation body, 5. Natural falling arch structure, 6. First inflection point, 7. Second inflection point, 8. Rescue position. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] like Figure 1 As shown, a rescue device for underground coal mine tunnel collapse accidents includes a guide drilling mechanism 1, a transmission connection mechanism 2 and a rescue channel mechanism 3;

[0029] like Figure 1 and Figure 2 As shown, the guide drilling mechanism 1 includes a central guide drill 1-1, a drill rod 1-2, a reaming drill 1-3 and a thin film spraying assembly 1-4; an electromagnetic ranging radar 1-5 is installed on the central guide drill 1-1, which has the function of transmitting and receiving electromagnetic wave signals while drilling, and measuring the interface between the collapsed accumulation body 4 and the natural falling arch structure 5 with obvious electrical differences. The principle is the electromagnetic wave reflection ranging principle. When the electromagnetic wave propagates in the medium, when it encounters an interface with electrical differences, the electromagnetic wave will be reflected, and the reflected wave will be received by the radar. By analyzing the characteristics such as the waveform and amplitude intensity change of the received electromagnetic wave, the distance between the radar position and the boundary surface is obtained. The collapsed accumulation body 4 has broken rock blocks and large gaps, while the surrounding rock of the natural falling arch structure 5 is relatively complete and dense. There is a significant density difference between the interfaces of the two, and the propagation and reflection signals of the electromagnetic waves will also be significantly different. The reaming drill 1-3 is connected to the central guide drill 1-1 through the drill rod 1-2. The diameter of the reaming drill 1-3 is larger than that of the central guide drill 1-1. A plurality of reaming tools 1-6 are provided at equal intervals along the circumference of the outer wall thereof, and a plurality of thin film spraying assemblies 1-4 are installed between adjacent reaming tools 1-6.

[0030] like Figure 3As shown, the thin film spraying assembly 1-4 includes a mounting seat 1-41, a support frame 1-42, a boosting chamber 1-43, a liquid inlet pipe 1-44 and a spray head 1-45; the mounting seat 1-41 is fixed on the reamer 1-3 body, and the mounting seat 1-41 is provided with a support frame 1-42, and the boosting chamber 1-43 and the liquid inlet pipe 1-44 are sealed and installed in the support frame 1-42, and the spray head 1-45 is installed on the exposed part of the top end of the support frame 1-42, and the boosting chamber 1-43 is used to connect the spray head 1-45 and one end of the liquid inlet pipe 1-44, and the other end of the liquid inlet pipe 1-44 is connected to the liquid supply passage 3-11; the function of the boosting chamber 1-43 is to increase the pressure of the spraying liquid, ensure that the spraying liquid is sprayed at a higher speed, and enhance the spray coverage ability;

[0031] like Figure 4 As shown, the transmission connection mechanism 2 includes a transmission connecting rod 2-1 and a ball joint structure. The ball joint structure includes an outer shell support 2-2. A retainer 2-4 is provided between the outer shell support 2-2 and the inner raceway 2-3. A plurality of transmission steel balls 2-5 are installed in the retainer 2-4. The transmission steel balls 2-5 are in rolling engagement with the outer shell support 2-2 and the inner raceway 2-3. One end of the transmission connecting rod 2-1 is connected to the reamer 1-3, and the other end is connected to the inner raceway 2-3.

[0032] like Figures 2 to 6 As shown, the rescue channel mechanism 3 includes an air-ribbed inflatable membrane pipe 3-1, one end of which is connected to the guide drilling mechanism 1 through a transmission connection mechanism 2; a liquid supply passage 3-11 and an air supply passage 3-12 are provided in the air-ribbed inflatable membrane pipe 3-1, and the liquid supply passage 3-11 and the air supply passage 3-12 both pass through the transmission connection mechanism 2 and the guide drilling mechanism 1, and are respectively used to provide spraying slurry and air for the thin film spraying component 1-4 and the air-ribbed inflatable membrane pipe 3-1.

[0033] In order to further improve the bearing strength of the air-ribbed inflatable membrane pipe 3-1, the air-ribbed inflatable membrane pipe 3-1 is provided with flexible reinforcing ribs 3-13, and the flexible reinforcing ribs 3-13 are fitted on the surface of the air-ribbed inflatable membrane pipe 3-1.

[0034] like Figure 7 As shown, a rescue method for a rescue device for a coal mine tunnel collapse accident includes the following steps:

[0035] S1, using a slope meter to detect the inclination of the collapsed accumulation body 4, and determining the initial drilling angle of the central pilot drill according to the measurement results;

[0036] S2. Install the guide drilling mechanism 1, the transmission connection mechanism 2, and the rescue channel mechanism 3 in sequence from front to back, and start the central guide drill 1-1 to drill along the slope of the collapsed accumulation body 4 at the initial drilling angle determined in S1;

[0037] S3. Under the guidance of the central guide drill, the reaming drill 1-3 enters the drilled hole along the same trajectory. Through the rotation and feeding action of the reaming drill 1-3, the reaming tool 1-6 continuously cuts and gradually expands the hole diameter. The air-ribbed inflatable membrane pipe 3-1 then enters the expanded hole diameter. At the same time, the film spraying assembly 1-4 sprays the surface of the collapsed accumulation body 4 in the drilled space and the fallen arch structure 5 above the accumulation body, forming a sprayed soft film with a temporary support effect.

[0038] S4. During the drilling process, the electromagnetic ranging radar 1-5 transmits electromagnetic wave signals in real time toward the drilling front and receives reflected signals. When the central pilot drill 1-1 approaches the first inflection point 6 of the collapsed accumulation 4, the electromagnetic ranging radar 1-5 detects that the reflected signals have a significant electrical difference, and the central pilot drill 1-1 automatically adjusts the drilling angle to nearly horizontal.

[0039] S5: The central pilot drill 1-1 continues drilling along the upper horizontal section of the collapsed accumulation body 4 until it approaches the second inflection point 7. When the electromagnetic ranging radar 1-5 detects again that the reflected signal has a significant electrical difference, the central pilot drill 1-1 automatically adjusts the drilling angle to the reverse of the initial drilling angle.

[0040] S6. After the guide drilling mechanism 1 bypasses the collapsed accumulation body 4 and arrives at the rescue location 8, the film spraying assembly 1-4 stops spraying, the air-ribbed inflatable membrane pipe 3-1 is inflated and expanded through the air supply passage 3-12, and the flexible reinforcement ribs 3-13 gradually fit tightly to the air-ribbed inflatable membrane pipe 3-1;

[0041] S7. Remove the guide drilling mechanism 1 and the transmission connection mechanism 2, and the trapped personnel evacuate from the inside of the air-ribbed inflatable membrane pipe 3-1 with load-bearing capacity.

[0042] like Figure 2 As shown, in order to ensure that personnel can pass through the rescue channel mechanism smoothly, the reaming drill 1-3 expands the aperture to not less than 600mm; in order to further ensure the safety of the rescue channel mechanism, the spray soft film formed by the thin film spraying assembly 1-4 has a tensile strength of not less than 30MPa, a thickness of not less than 5mm, and an initial setting time of not more than 60s.

Claims

1. A rescue method for underground coal mine tunnel collapse accidents, characterized in that: The steps include: S1. Using a slope meter to detect the inclination of the collapsed accumulation body (4), and determining the initial drilling angle of the central guide drill (1-1) based on the measurement results; S2, sequentially installing the guide drilling mechanism (1), the transmission connection mechanism (2), and the rescue channel mechanism (3) from front to back, and starting the central guide drill (1-1) to drill along the slope of the collapsed accumulation body (4) along the initial drilling angle determined in S1; S3, the electromagnetic ranging radar (1-5) transmits electromagnetic wave signals in real time to the front of the drill and receives reflected signals during the drilling process. When the central guide drill (1-1) approaches the first inflection point (6) of the collapsed accumulation body (4), the electromagnetic ranging radar (1-5) detects that the reflected signal has obvious electrical differences, and the central guide drill (1-1) automatically adjusts the drilling angle to nearly horizontal. S4, the central guide drill (1-1) continues to drill along the upper horizontal section of the collapsed accumulation body (4) until it approaches the second inflection point (7). When the electromagnetic ranging radar (1-5) detects again that the reflected signal has an obvious electrical difference, the central guide drill (1-1) automatically adjusts the drilling angle to the reverse of the initial drilling angle; S5, the reaming drill (1-3) enters the drilled hole along the same trajectory under the traction of the central guide drill (1-1), and through the rotation and feeding action of the reaming drill (1-3), the reaming tool (1-6) continuously cuts and gradually expands the hole diameter, and the air rib inflatable membrane pipe (3-1) then enters the expanded hole diameter. At the same time, the film spraying component (1-4) sprays the collapsed accumulation body (4) in the drilled space and the surface of the fallen arch above the accumulation body, forming a spray soft film with a temporary support effect; S6. After the guide drilling mechanism (1) bypasses the collapsed accumulation body (4) and arrives at the rescue position (8), the film spraying assembly (1-4) stops spraying, the air rib type inflatable membrane pipe (3-1) is inflated and expanded through the air supply passage (3-12), and the flexible reinforcement rib (3-13) and the air rib type inflatable membrane pipe (3-1) are gradually fitted and tightened; S7, removing the guide drilling mechanism (1) and the transmission connection mechanism (2), and the trapped personnel evacuate from the inside of the air-ribbed inflatable membrane pipe (3-1) with load-bearing capacity; The rescue device on which the rescue method is based comprises a guide drilling mechanism (1), a transmission connection mechanism (2) and a rescue channel mechanism (3); The guide drilling mechanism (1) includes a central guide drill (1-1), a drill rod (1-2), a reaming drill (1-3) and a thin film spraying assembly (1-4); an electromagnetic ranging radar (1-5) is installed on the central guide drill (1-1); the reaming drill (1-3) is connected to the central guide drill (1-1) through the drill rod (1-2); the reaming drill (1-3) has a larger diameter than the central guide drill (1-1), and a plurality of reaming tools (1-6) are provided at equal intervals along the circumference of the outer wall thereof; and a plurality of thin film spraying assemblies (1-4) are installed between adjacent reaming tools (1-6); The transmission connection mechanism (2) includes a transmission connecting rod (2-1) and a ball joint structure, the ball joint structure includes an outer shell support (2-2), a retaining frame (2-4) between the outer shell support (2-2) and the inner raceway (2-3), a plurality of transmission steel balls (2-5) are installed in the retaining frame (2-4), the transmission steel balls (2-5) are in rolling engagement with the outer shell support (2-2) and the inner raceway (2-3), one end of the transmission connecting rod (2-1) is connected to the reamer (1-3), and the other end is connected to the inner raceway (2-3); The rescue channel mechanism (3) includes an air-ribbed inflatable membrane pipe (3-1), one end of which is connected to the guide drilling mechanism (1) through a transmission connection mechanism (2); a liquid supply passage (3-11) and an air supply passage (3-12) are provided in the air-ribbed inflatable membrane pipe (3-1), and the liquid supply passage (3-11) and the air supply passage (3-12) both pass through the transmission connection mechanism (2) and the guide drilling mechanism (1), and are used to provide spray slurry and air to the thin film spraying component (1-4) and the air-ribbed inflatable membrane pipe (3-1), respectively.

2. The rescue method for coal mine tunnel collapse accident according to claim 1, characterized in that: The air-ribbed inflatable membrane pipe (3-1) is provided with flexible reinforcing ribs (3-13), and the flexible reinforcing ribs (3-13) are arranged in close contact with the surface of the air-ribbed inflatable membrane pipe (3-1).

3. The rescue method for coal mine tunnel collapse accident according to claim 1, characterized in that: The thin film spraying assembly (1-4) comprises a mounting seat (1-41), a support frame (1-42), a pressurizing chamber (1-43), a liquid inlet pipe (1-44) and a spray head (1-45); the mounting seat (1-41) is fixed on the reamer (1-3) body, the mounting seat (1-41) is provided with a support frame (1-42), the pressurizing chamber (1-43) and the liquid inlet pipe (1-44) are sealed and installed in the support frame (1-42), the spray head (1-45) is installed on the exposed portion of the top end of the support frame (1-42), the pressurizing chamber (1-43) is used to connect the spray head (1-45) and one end of the liquid inlet pipe (1-44), and the other end of the liquid inlet pipe (1-44) is connected to the liquid supply passage (3-11).

4. The rescue method for coal mine tunnel collapse accident according to claim 1, characterized in that: The reamer (1-3) expands the hole diameter to no less than 600 mm; the spray soft film formed by the thin film spraying assembly (1-4) has a tensile strength of no less than 30 MPa, a thickness of no less than 5 mm, and an initial setting time of no more than 60 seconds.

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