Rescue device and rescue method for collapse accident of underground roadway of coal mine

Abstract

The invention discloses a rescue device and a rescue method for coal mine underground roadway collapse accidents. The device comprises a guide drilling mechanism, a transmission connection mechanism and a rescue channel mechanism. The method comprises the steps that the inclination gradient of a collapsed accumulation body is detected, and an initial drilling angle is determined; a center guide drill drills along the slope of the collapsed accumulation body; the electromagnetic ranging radar performs real-time detection, and when signals have obvious electrical difference, the drilling angle is adjusted to be nearly horizontal; the center guide drill continues to drill along the collapsed accumulation body, and when the electromagnetic ranging radar detects that the signals have obvious electrical difference, the drilling angle is adjusted to the initial drilling angle to be reversely inclined; the hole diameter is expanded by an expanding drill, the air rib type pneumatic membrane pipeline enters the expanded hole diameter, and a membrane spraying assembly is used for spraying; and the guiding drilling mechanism bypasses the collapsed accumulation body to reach the rescue position, the film spraying assembly stops spraying, the air rib type pneumatic membrane pipeline is inflated and unfolded, and the trapped person evacuates from the interior of the air rib type pneumatic membrane pipeline. According to the invention, the rescue efficiency and success rate of coal mine underground roadway collapse accidents can be improved.

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 tunnel excavation space. The existing rescue methods often use manpower or excavators to directly clear the collapsed blockage (or excavate the collapsed blockage in an all-round and large-scale manner), and at the same time provide timely support for the excavation space. The spatial structure above the collapsed blockage is not considered, and a new rescue channel is opened to bypass the collapse accident area, resulting in a huge amount of engineering work, a long time, and rescue is difficult to complete within the golden time, causing great loss of life and property. Summary of the invention

[0003] In view of 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 life and property losses.

[0004] In order to achieve the above-mentioned object, the present invention provides a rescue device for underground coal mine tunnel collapse accidents, including 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; an electromagnetic ranging radar is installed on the central guide drill, which has the function of transmitting and receiving electromagnetic wave signals while drilling, and determining 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 through the drill rod, the diameter of the reaming drill is larger than that of the central guide drill, and a plurality of reaming tools are arranged at equal intervals along the circumference of its outer wall, and a plurality of 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 retaining frame is provided between the outer shell support and the inner raceway, a plurality of transmission steel balls are installed in the retaining frame, the transmission steel balls are in rolling cooperation 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 a 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 run 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 pressurizing chamber, a liquid inlet pipe and a spray head; the mounting seat is fixed on the reamer body, the mounting seat is provided with a support frame, the support frame is sealed with a pressurizing chamber and a liquid inlet pipe, the spray head is installed on the exposed part of the top of the support frame, the pressurizing 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 tunnel collapse accident in a coal mine, comprising the following steps:

[0011] S1. Use a slope meter to detect the inclination of the collapsed accumulation body, and determine the initial drilling angle of the central guide drill according to the measurement results;

[0012] S2, sequentially installing the guide drilling mechanism, the transmission connection mechanism and the rescue channel mechanism from front to back, and starting the central guide drill to drill along the slope of the collapsed accumulation body along the initial drilling angle determined in S1;

[0013] S3. During the drilling process, the electromagnetic ranging radar transmits electromagnetic wave signals to the front of the drilling and receives reflected signals in real time. When the central pilot drill approaches the first turning point of the collapsed accumulation body, the electromagnetic ranging radar detects that the reflected signal has obvious electrical differences, and the central pilot drill automatically adjusts the drilling angle to nearly horizontal.

[0014] S4, the central guide drill continues to drill along the upper horizontal section of the collapsed accumulation body until it approaches the second inflection point. When the electromagnetic ranging radar detects again that the reflected signal has an obvious electrical difference, the central guide drill automatically adjusts the drilling angle to the reverse of the initial drilling angle, that is, the drilling trajectory continues to drill along the boundary between the caving arch and the accumulation body;

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

[0016] S6. After the guide drilling mechanism bypasses the collapsed accumulation body and arrives at the rescue location, the film spraying assembly stops spraying, 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 reamer expands the aperture to not less than 600mm; the tensile strength of the sprayed soft film formed by the thin film spraying assembly is not less than 30MPa, the thickness of the sprayed soft film is not less than 5mm, and the initial setting time of the sprayed soft film is not 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 built; 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 up channels and reduce the amount of engineering in 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 collapse of the tunnel, 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 schematic diagram of the structure of the present invention;

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

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

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

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

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

[0025] Figure 7 It is the 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. Shell support, 2-3. Inner raceway, 2-4. Retaining frame, 2-5. Transmission steel ball; 3. Rescue channel mechanism, 3-1. Air rib inflatable membrane pipeline, 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 in conjunction with 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 determining the interface between the collapsed accumulation body 4 and the natural caving 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 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 an obvious density difference between the interfaces of the two, and the propagation and reflection signals of 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 arranged at equal intervals along the circumference of its outer wall, and a plurality of thin film spraying components 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 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, and the mounting seat 1-41 is provided with a support frame 1-42, and the pressurizing 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 of the support frame 1-42, and 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; the function of the pressurizing 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 spraying 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 retaining frame 2-4 is 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 rollingly matched 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 run 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 assembly 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 tunnel collapse accident in a coal mine, comprising 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 guide drill according to the measurement results;

[0036] S2, sequentially install the guide drilling mechanism 1, the transmission connection mechanism 2 and the rescue channel mechanism 3 from front to back, and start 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;

[0037] S3, the reaming drill 1-3 enters the drilled hole along the same trajectory under the traction of the central guide drill. Through the rotation and feeding action of the reaming drill 1-3, the reaming tool 1-6 continuously cuts and gradually expands the aperture, and the air rib inflatable membrane pipe 3-1 enters the expanded aperture. At the same time, the film spraying component 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 spray soft film with a temporary support effect;

[0038] S4, the electromagnetic ranging radar 1-5 transmits electromagnetic wave signals to the front of the drilling process and receives reflected signals in real time 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;

[0039] S5, 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;

[0040] 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 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 inflatable membrane pipe 3-1 are gradually fitted and tightened;

[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 pipeline 3-1 with load-bearing capacity.

[0042] like Figure 2 As shown, to ensure that personnel can pass through the rescue channel mechanism smoothly, the reamer 1-3 expands the aperture to not less than 600mm; 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 coagulation time of not more than 60s.

Claims

1. A rescue device for underground coal mine tunnel collapse accidents, characterized in that: It comprises a guide drilling mechanism (1), a transmission connection mechanism (2) and a rescue channel mechanism (3); The guide drilling mechanism (1) comprises 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 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 arranged 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) comprises a transmission connecting rod (2-1) and a ball joint structure, wherein the ball joint structure comprises an outer shell support (2-2), a retaining frame (2-4) is arranged 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), and the transmission steel balls (2-5) are rollingly matched 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) comprises an air-ribbed inflatable membrane pipe (3-1), one end of which is connected to the guide drilling mechanism (1) via 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 device for coal mine tunnel collapse accidents 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 device for coal mine tunnel collapse accidents 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, a support frame (1-42) is arranged on the mounting seat (1-41), a pressurizing chamber (1-43) and a 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 part of the top 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. A rescue method using the rescue device for underground mine tunnel collapse accidents according to claim 1 or 3, characterized in that: The steps include: S1, using a slope meter to detect the inclination slope of the collapsed accumulation body (4), and determining the initial drilling angle of the central guide drill (1-1) according to the measurement result; 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 to the front of the drilling process and receives reflected signals in real time during the drilling process. When the central guide drill (1-1) approaches the first turning 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 the reaming tool (1-6) continuously cuts and gradually expands the hole diameter through the rotation and feeding action of the reaming drill (1-3), and the air rib inflatable membrane pipe (3-1) enters the expanded hole diameter accordingly. At the same time, the thin 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-ribbed inflatable membrane pipe (3-1) is inflated and expanded through the air supply passage (3-12), and the flexible reinforcement ribs (3-13) and the air-ribbed inflatable membrane pipe (3-1) are gradually fitted and tightened; S7, the guide drilling mechanism (1) and the transmission connection mechanism (2) are removed, and the trapped personnel are evacuated from the inside of the air-ribbed inflatable membrane pipeline (3-1) with load-bearing capacity.

5. The rescue method for underground coal mine tunnel collapse accident according to claim 4, 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 coagulation time of no more than 60 s.

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