High-position drilling gas extraction and grouting cooperated filling device and method

Abstract

The invention discloses a high-position drill hole gas extraction and grouting cooperative filling device and method, and belongs to the technical field of gas extraction and filling mining, the device comprises a high-position drill hole formed above a high-gas coal seam, an extraction mechanism and a grouting mechanism are arranged in the high-position drill hole, the extraction mechanism comprises a fracturing extraction main pipe arranged in the high-position drill hole, and the grouting mechanism is arranged in the fracturing extraction main pipe; a plurality of fracturing extraction branch pipes are arranged at the end, close to the fracturing coal body, of the fracturing extraction main pipe at equal intervals, the top of the fracturing extraction main pipe communicates with an extraction part, and the grouting mechanism comprises a grouting hose arranged in the high-position drill hole. The grouting hose and the fracturing extraction main pipe are both arranged in the high-position drill hole, and a plurality of fracturing extraction branch pipes are arranged on the fracturing extraction main pipe at fixed intervals; before a coal seam is mined, the fracturing extraction main pipe and the fracturing extraction branch pipe are used for extracting a fracturing coal body, and after the coal seam is mined, continuous grouting is carried out in a goaf through the grouting part and the grouting hose, so that the cooperative operation of fracturing gas extraction and grouting filling is realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of gas extraction and filling mining, and in particular relates to a high-position drilling gas extraction coordinated grouting and filling device and method. Background Art

[0002] In recent years, the production of coal-based solid waste has been substantial, with surface accumulation significantly depleting land resources and polluting mining environments. Using coal-based solid waste to prepare pastes and cements for mine filling has become a hot topic. The development of a comprehensive technical framework for mine filling, including multi-field coupling theory, rock stratum movement theory, and long-distance pipeline transportation theory, has been gradually refined. Facts have proven that mine filling can effectively dispose of coal-based solid waste and reduce surface subsidence.

[0003] For filling mining in high-gas mines, it is difficult to achieve coordinated operation and mutual interference using traditional gas extraction technology and filling mining technology. Therefore, there is an urgent need for a high-position drilling gas extraction and coordinated grouting filling device and method to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-position drilling gas extraction coordinated grouting filling device and method to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following solution: The present invention provides a high-position drilling gas extraction and coordinated grouting filling device, including a high-position drilling hole arranged above a high-gas coal seam, the high-position drilling hole is located above the fractured coal body, and an extraction mechanism and a grouting mechanism are respectively provided in the high-position drilling hole. The extraction mechanism includes a fractured extraction main pipe arranged in the high-position drilling hole, and a plurality of fractured extraction branches are evenly spaced at one end of the fractured extraction main pipe near the fractured coal body. The bottom of the fractured extraction branch pipe extends into the fractured coal body, and the top of the fractured extraction main pipe is connected to an extraction part. The grouting mechanism includes a grouting hose arranged in the high-position drilling hole, one end of the grouting hose is located above the filling space, and the other end of the grouting hose is connected to the grouting part.

[0006] Preferably, the extraction section includes a gas storage tank body connected to the fracturing extraction main pipe, and a pressure monitoring gauge is installed on the gas storage tank body.

[0007] Preferably, a first control valve is installed at one end of the fracturing extraction main pipe close to the gas storage tank body.

[0008] Preferably, the grouting part includes a grouting main pump connected to the grouting hose, the grouting main pump is connected to a mixing and stirring tank, and the mixing and stirring tank is also connected to a material tank and a water tower.

[0009] Preferably, a second control valve is installed at one end of the grouting hose close to the grouting main pump.

[0010] Preferably, the grouting main pump is connected to the mixing and stirring tank through a first connecting pipe, the material tank is connected to the mixing and stirring tank through a second connecting pipe, a third control valve is installed on the second connecting pipe, and the water tower is connected to the mixing and stirring tank through a third connecting pipe, and a fourth control valve is installed on the third connecting pipe.

[0011] Preferably, a grouting filling support is provided on the side of the filling space close to the high-gas coal seam.

[0012] A high-position drilling gas extraction and coordinated grouting filling method comprises the following steps:

[0013] S1. Calculate the corresponding collapse zone height based on the occurrence conditions of high-gas coal seams;

[0014] S2. Directional drilling of high-level boreholes from the surface area not affected by mining to the middle of the high-gas coal seam, extending to the working face;

[0015] S3. Install the grouting unit, connect the grouting hose to the grouting unit, and arrange it above the filling space through the high-position drill hole;

[0016] S4. Install the fracturing extraction main pipe and the fracturing extraction branch pipe, connect the fracturing extraction main pipe with the extraction section, and install the fracturing extraction branch pipe into the fracturing coal body;

[0017] S5. Before starting the coal mining operation, open the first control valve and extract the gas inside the fractured coal body through the extraction unit. After the gas extraction near the working face is completed, start the coal mining operation;

[0018] S6. During the coal mining operation, a grouting support is installed between the fractured coal body and the filling space, and the grouting unit is started to produce slurry and the slurry is transported to the filling space through the grouting hose;

[0019] S7, repeat steps S5 and S6 until the working face stops mining;

[0020] S8. After step S7 is completed, the grouting hose, the fracturing extraction main pipe, and the fracturing extraction branch pipe are recovered and moved to the next working face to repeat the operation.

[0021] The present invention discloses the following technical effects: the present invention excavates a high-position borehole from the ground to just above the middle of the high-gas coal seam inclination, and extends to the working face position. The grouting hose and the fracturing extraction main pipe are both arranged inside the high-position borehole, and a plurality of fracturing extraction branch pipes are arranged on the fracturing extraction main pipe at fixed distances; before coal seam mining, the fracturing coal body is extracted by the fracturing extraction main pipe and the fracturing extraction branch pipe, and after coal seam mining, grouting is continuously injected into the goaf through the grouting part and the grouting hose to realize the coordinated operation of fracturing gas extraction and grouting filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings that constitute part of this application are used to provide a further understanding of this application. The embodiments and descriptions of this application are used to explain this application and do not constitute an improper limitation of this application. In the drawings:

[0023] Figure 1 This is a schematic structural diagram of the high-position drilling gas extraction and grouting and filling device of the present invention;

[0024] Figure 2 This is a front view of the high-position drilling gas extraction and coordinated grouting filling device of the present invention;

[0025] Figure 3 This is a top view of the high-position drilling and gas extraction coordinated grouting and filling device of the present invention.

[0026] In the figure: 1. High-gas coal seam; 2. Filling space; 3. Fracture coal body; 4. Slurry; 5. Grouting filling support; 6. Grouting hose; 7. Fracture extraction branch pipe; 8. High-position drilling hole; 9-1. First control valve; 9-2. Second control valve; 9-3. Third control valve; 9-4. Fourth control valve; 10. Gas storage tank body; 11. Pressure monitoring gauge; 12. Grouting main pump; 13. Material tank; 14. Water tower; 15. Mixing and stirring tank; 16. Fracture extraction main pipe; 17. Transport chute; 18. Return air chute. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Reference Figure 1-Figure 3As shown, this embodiment provides a high-position drilling gas extraction and coordinated grouting filling device, including a high-position drilling hole 8 arranged above the high-gas coal seam 1, the high-position drilling hole 8 is located above the fractured coal body 3, and an extraction mechanism and a grouting mechanism are respectively provided in the high-position drilling hole 8. The extraction mechanism includes a fractured extraction main pipe 16 arranged in the high-position drilling hole 8, and a plurality of fractured extraction branch pipes 7 are evenly spaced at one end of the fractured extraction main pipe 16 near the fractured coal body 3. The bottom of the fractured extraction branch pipe 7 extends into the fractured coal body 3, and the top of the fractured extraction main pipe 16 is connected to the extraction part. The grouting mechanism includes a grouting hose 6 arranged in the high-position drilling hole 8, one end of the grouting hose 6 is located above the filling space 2, and the other end of the grouting hose 6 is connected to the grouting part.

[0030] The present invention excavates a high-position borehole 8 from the ground to just above the middle of the high-gas coal seam 1, and extends to the working face position. The grouting hose 6 and the fracturing extraction main pipe 16 are both arranged inside the high-position borehole 8, and multiple fracturing extraction branch pipes 7 are arranged at fixed distances on the fracturing extraction main pipe 16; before coal seam mining, the fracturing coal body 3 is extracted by the fracturing extraction main pipe 16 and the fracturing extraction branch pipe 7, and after coal seam mining, grouting is continuously injected into the goaf through the grouting part and the grouting hose 6 to realize the coordinated operation of fracturing extraction of gas and grouting filling.

[0031] To further optimize the solution, the extraction section includes a gas storage tank body 10 connected to the fracturing extraction main pipe 16, and a pressure monitoring gauge 11 is installed on the gas storage tank body 10.

[0032] The gas extracted from the fractured coal body 3 is stored in the gas storage tank body 10.

[0033] To further optimize the solution, a first control valve 9-1 is installed at one end of the fracturing extraction main pipe 16 close to the gas storage tank body 10. When gas storage is required, the first control valve 9-1 is opened.

[0034] To further optimize the solution, the grouting section includes a grouting main pump 12 connected to the grouting hose 6 , the grouting main pump 12 is connected to a mixing tank 15 , and the mixing tank 15 is also connected to a material tank silo 13 and a water tower 14 .

[0035] The material tank 13 and the water tower 14 transport aggregates, binders and water to the mixing tank 15. After the mixture is fully stirred, the mixed slurry is pressurized by the grouting main pump 12 and transported to the filling space 2 through the grouting hose 6.

[0036] To further optimize the solution, a second control valve 9-2 is installed at one end of the grouting hose 6 close to the grouting main pump 12.

[0037] To further optimize the solution, the grouting main pump 12 is connected to the mixing and stirring tank 15 through a first connecting pipe, the material tank 13 is connected to the mixing and stirring tank 15 through a second connecting pipe, a third control valve 9-3 is installed on the second connecting pipe, and the water tower 14 is connected to the mixing and stirring tank 15 through a third connecting pipe, a fourth control valve 9-4 is installed on the third connecting pipe.

[0038] The core function of the transport chute is coal transportation: as a transportation channel for coal mined from the working face, the coal is transported to the main transportation system (such as the main tunnel or shaft) through belt conveyors, scraper conveyors and other equipment.

[0039] Equipment layout: Coal mining machines, transfer machines, crushers and other equipment are usually arranged, which are the key links of the production system.

[0040] Auxiliary function: In some cases, it is used to transport materials and equipment (such as hydraulic support components). It may also serve as an air intake channel (depending on the ventilation design).

[0041] The core function of the return air chute is ventilation and return air: it serves as an exhaust channel for polluted air (including gas, dust, etc.) from the working face, connecting to the return air main tunnel or special return air shaft to ensure underground air circulation.

[0042] Safe emission: discharge harmful substances such as gas and dust to reduce the risk of explosion.

[0043] Auxiliary functions: May be used to arrange gas extraction pipelines, monitoring sensors and other safety facilities. In some mines, it is used to lay drainage pipelines (such as drainage of seepage water from the working face).

[0044] To further optimize the solution, a grouting filling bracket 5 is provided on the side of the filling space 2 close to the high-gas coal seam 1.

[0045] A high-position drilling gas extraction and coordinated grouting filling method comprises the following steps:

[0046] S1. Calculate the corresponding collapse zone height based on the occurrence conditions of high-gas coal seam 1;

[0047] S2. Directional drilling of a high-position borehole 8 from the surface area not affected by mining to the middle of the high-gas coal seam 1, extending to the working face. The high-position borehole 8 is located above the collapsed zone of the working face of the high-gas coal seam 1.

[0048] S3, install the grouting part, connect the grouting hose 6 to the grouting part, and arrange it above the filling space 2 through the high-position drilled hole 8; build a gas storage tank body 10, a pressure monitoring gauge 11, a grouting main pump 12, a material tank silo 13, a water tower 14, and a mixing and stirring tank 15 on the ground, and connect the material tank silo 13 and the water tower 14 to the mixing and stirring tank 15 through the second connecting pipe and the third connecting pipe respectively, and connect the outlet end of the mixing and stirring tank 15 to the grouting main pump 12 through the first connecting pipe; connect the grouting hose 6 to the grouting main pump 12, and arrange it above the filling space 2 through the high-position drilled hole 8;

[0049] S4. Install the fracturing drainage main pipe 16 and the fracturing drainage branch pipe 7, connect the fracturing drainage main pipe 16 to the drainage section, and install the fracturing drainage branch pipe 7 inside the fracturing coal body 3; connect the fracturing drainage main pipe 16 to the gas storage tank body 10, and arrange it above the working face through the high-position drill hole 8. Subsequently, connect the fracturing drainage branch pipe 7 to the coal body at regular intervals on the fracturing drainage main pipe 16;

[0050] S4. Before the start of coal mining, open the first control valve 9-1 to extract the gas inside the fractured coal body 3 through the extraction unit. After the gas extraction near the working face is completed, start the coal mining operation.

[0051] S5. During the coal mining operation, the grouting support 5 moves forward. At this time, the second control valve 9-2 and the third control valve 9-3 are opened to start slurrying. The material tank 13 and the water tower 14 deliver aggregate, binder and water to the mixing tank 15. After the mixture is fully stirred, the slurry 4 is pressurized by the grouting main pump 12 and delivered to the filling space 2 by the grouting hose 6.

[0052] S6, repeat steps S4 and S5 until the working face stops mining;

[0053] S7. After step S6 is completed, the grouting hose 6, the fracturing extraction main pipe 16, and the fracturing extraction branch pipe 7 are recovered and moved to the next working face to repeat the operation.

[0054] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0055] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A high-position drilling gas extraction and grouting device, characterized by: The invention comprises a high-position drill hole (8) arranged above a high-gas coal seam (1), wherein the high-position drill hole (8) is located above a fractured coal body (3), and an extraction mechanism and a grouting mechanism are respectively provided in the high-position drill hole (8), wherein the extraction mechanism comprises a fractured extraction main pipe (16) arranged in the high-position drill hole (8), and a plurality of fractured extraction branch pipes (7) are evenly spaced at one end of the fractured extraction main pipe (16) close to the fractured coal body (3), wherein the bottom of the fractured extraction branch pipe (7) extends into the fractured coal body (3), and the top of the fractured extraction main pipe (16) is connected to an extraction part, and the grouting mechanism comprises a grouting hose (6) arranged in the high-position drill hole (8), wherein one end of the grouting hose (6) is located above a filling space (2), and the other end of the grouting hose (6) is connected to a grouting part.

2. The high-position drilling gas extraction and grouting device according to claim 1 is characterized in that: The extraction section comprises a gas storage tank body (10) connected to the fracturing extraction main pipe (16), and a pressure monitoring gauge (11) is installed on the gas storage tank body (10).

3. The high-position drilling gas extraction and grouting device according to claim 2 is characterized in that: A first control valve (9-1) is installed at one end of the fracturing extraction main pipe (16) close to the gas storage tank body (10).

4. The high-position drilling gas extraction and grouting device according to claim 1 is characterized in that: The grouting section comprises a grouting main pump (12) connected to the grouting hose (6); the grouting main pump (12) is connected to a mixing and stirring tank (15); and the mixing and stirring tank (15) is further connected to a material tank (13) and a water tower (14).

5. The high-position drilling gas extraction and grouting device according to claim 4 is characterized in that: A second control valve (9-2) is installed at one end of the grouting hose (6) close to the grouting main pump (12).

6. The high-position drilling gas extraction and grouting device according to claim 4 is characterized in that: The grouting main pump (12) is connected to the mixing and stirring tank (15) through a first connecting pipe, the material tank (13) is connected to the mixing and stirring tank (15) through a second connecting pipe, a third control valve (9-3) is installed on the second connecting pipe, and the water tower (14) is connected to the mixing and stirring tank (15) through a third connecting pipe, and a fourth control valve (9-4) is installed on the third connecting pipe.

7. The high-position drilling gas extraction and grouting device according to claim 1 is characterized in that: A grouting filling support (5) is provided on a side of the filling space (2) close to the high-gas coal seam (1).

8. A method for coordinating grouting and filling gas extracted from a high-position borehole, based on the coordinating grouting and filling device for coordinating gas extracted from a high-position borehole according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Calculate the corresponding collapse zone height according to the occurrence conditions of the high-gas coal seam (1); S2, directionally drilling a high-position borehole (8) from the surface area not affected by mining to the upper part of the middle of the high-gas coal seam (1) and extending it to the working face; S3, installing the grouting part, connecting the grouting hose (6) to the grouting part, and arranging it above the filling space (2) through the high-position drill hole (8); S4, installing the fracturing extraction main pipe (16) and the fracturing extraction branch pipe (7), connecting the fracturing extraction main pipe (16) with the extraction part, and installing the fracturing extraction branch pipe (7) into the fracturing coal body (3); S5. Before the start of coal mining, the first control valve (9-1) is opened to extract the gas inside the fractured coal body (3) through the extraction unit. After the gas extraction near the working face is completed, the coal mining operation begins; S6. During the coal mining operation, a grouting and filling support (5) is installed between the fractured coal body (3) and the filling space (2), and the grouting unit is started to produce slurry, which is then transported to the filling space (2) through the grouting hose (6); S7, repeat steps S5 and S6 until the working face stops mining; S8. After step S7 is completed, the grouting hose (6), the fracturing extraction main pipe (16), and the fracturing extraction branch pipe (7) are recovered and moved to the next working face to repeat the operation.

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