A drilling and drainage device for water in goaf

Abstract

The present invention discloses a drilling and drainage device for goaf water, which includes a drill tool for drilling goaf water and a borehole during the drilling process of the drill tool, a water-stop casing with an exhaust port and a slag discharge port, a water volume measuring mechanism, an anti-blowout negative pressure extraction system, and a gas-water separation and drainage system. The inner wall surface of the borehole is provided with a water-stop casing, and a sealing mechanism for the exhaust port and the slag discharge port of the water-stop casing is arranged in the borehole. The exhaust port at the top on one side of the water-stop casing is connected to the intake port of the anti-blowout negative pressure extraction system, and the slag discharge port arranged at the bottom on one side of the water-stop casing is connected to the inlet end of the gas-water separation and drainage mechanism through a provided slag discharge casing. The slag discharge casing is connected to the inlet end of the gas-water separation and drainage system through a provided slag discharge volume adjusting mechanism; the outlet end of the gas-water separation and drainage system is connected to another provided intake port of the anti-blowout negative pressure extraction system, and a water volume measuring mechanism is arranged at the water outlet end of the gas-water separation and drainage system.

Description

Technical Field

[0001] The present invention belongs to the field of coal mine drilling and drainage equipment. More specifically, the present invention relates to a drilling and drainage device for water in old goafs. Background Art

[0002] Nowadays, the exploration and drainage projects for water in old goafs are becoming more and more frequent. Strict requirements are needed for the drainage of water taken from old goafs because there are many potential safety hazards in the exploration and drainage projects of water in old goafs, and the lives of employees are threatened.

[0003] The current drilling process: During the drilling process, a blowout prevention and gas drainage system is not installed at the orifice. When penetrating the goaf, it is easy for the accumulated gas and toxic and harmful gases in the goaf to gush out instantaneously. First, it causes gas overrun; second, the inhalation of toxic and harmful gases poses a hazard to construction workers. And during the drainage process: For the water outlet borehole, the traditional method is open drainage. During the drainage process, it is easy for oxygen in the air to enter the goaf through the borehole. Especially for the drainage of old goaf water with water source replenishment, long-term open leakage of air will pose a safety hazard to the fire prevention in the goaf. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a drilling and drainage device for water in old goafs. This process has significant safety benefits, huge economic benefits, and greatly improved exploration and drainage efficiency.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows: It includes a drill for drilling water in old goafs and a borehole during the drilling process of the drill. It is characterized in that: it includes a water-stop casing with an exhaust port and a slag discharge port, a water volume measurement mechanism, a blowout prevention and negative pressure gas drainage system, and a gas-water separation and drainage system. The inner wall surface of the borehole is provided with a water-stop casing, and a sealing mechanism for the exhaust port and slag discharge port of the water-stop casing is arranged in the borehole. The exhaust port at the top of one side of the water-stop casing is connected to the air inlet of the blowout prevention and negative pressure gas drainage system, and the slag discharge port arranged at the bottom of one side of the water-stop casing is connected to the inlet end of the gas-water separation and drainage mechanism through a set slag discharge casing. The slag discharge casing is connected to the inlet end of the gas-water separation and drainage system through a set slag discharge volume adjustment mechanism; the outlet end of the gas-water separation and drainage system consists of a water outlet end and a gas outlet end. The gas outlet end of the gas-water separation and drainage system is connected to another air inlet of the blowout prevention and negative pressure gas drainage system, and the water outlet end of the gas-water separation and drainage system is provided with a water volume measurement mechanism.

[0006] For a drilling and drainage device for water in old goafs provided by this technical solution, the blowout prevention and negative pressure gas drainage system includes a first exhaust pipe, a second exhaust pipe, and a gas drainage pipeline with negative pressure. The air inlet of the first exhaust pipe is connected to the exhaust port of the water-stop casing, and the air outlet of the exhaust pipe is connected to the air inlet of the gas drainage pipeline; the air inlet of the second exhaust pipe is connected to the gas outlet end of the gas-water separation and drainage system, and the air outlet of the second exhaust pipe is connected to another air inlet arranged on the gas drainage pipeline.

[0007] A drilling and drainage device for goaf water provided by this technical solution. The gas-water separation and drainage system consists of a U-shaped pipe, a second high-pressure gate valve, a high-pressure water pipe, a negative pressure gauge, a positive pressure gauge, and a drainage pipeline. The gas outlet end at the top of one side pipe orifice of the U-shaped pipe is connected to the air inlet of the second exhaust pipe through the second high-pressure gate valve and the negative pressure gauge. The second high-pressure gate valve is arranged between the negative pressure gauge and the gas outlet end of the U-shaped pipe; the water outlet end at the side of one side pipe orifice of the U-shaped pipe is connected to the water inlet of the drainage pipeline through the high-pressure water pipe. A positive pressure gauge and the water volume measuring mechanism are arranged on the high-pressure water pipe.

[0008] A drilling and drainage device for goaf water provided by this technical solution. The positive pressure gauge is arranged between the water outlet end of the U-shaped pipe and the water volume measuring mechanism, and the water volume measuring mechanism is arranged between the positive pressure gauge and the drainage pipeline.

[0009] A drilling and drainage device for goaf water provided by this technical solution. The water volume measuring mechanism consists of a flowmeter and a third high-pressure gate valve. The third high-pressure gate valve is arranged between the positive pressure gauge and the flowmeter, and the flowmeter for reading the water discharge volume is arranged between the third high-pressure gate valve and the water inlet of the drainage pipeline.

[0010] A drilling and drainage device for goaf water provided by this technical solution. The sealing mechanism is a fourth high-pressure gate valve and a sealing ring for sealing. The sealing ring is arranged at one end of the drill hole far from the drilling direction and the exhaust port and slag discharge port of the water stop casing, and the fourth high-pressure gate valve is arranged at one end of the drill hole close to the drilling direction.

[0011] A drilling and drainage device for goaf water provided by this technical solution. The slag discharge volume adjusting mechanism is a first high-pressure gate valve for controlling the slag discharge volume. The slag discharge casing is connected to the inlet end of the U-shaped pipe through the first high-pressure gate valve.

[0012] A drilling and drainage device for goaf water provided by this technical solution. Flange plates are arranged at both ends of the first high-pressure gate valve, the second high-pressure gate valve, the third high-pressure gate valve, and the fourth high-pressure gate valve.

[0013] A drilling and drainage device for goaf water provided by this technical solution. A flange plate is arranged at one end of the sealing ring close to the exhaust port of the water stop casing.

[0014] A drilling and drainage device for water in old goafs provided by this technical solution. A water-stop casing is arranged on the inner wall of the borehole left after the drilling tool drills. The harmful gases in the borehole are discharged into the extraction pipeline through the exhaust port arranged at the top of one side of the water-stop casing by the negative pressure principle. The mixture in the borehole is discharged into the U-shaped pipe through the slag discharge port at the bottom of one side of the water-stop casing through the slag discharge casing. After the mixture enters the U-shaped pipe, according to the pressure difference, the gas in the mixture enters the extraction pipeline through the exhaust end of the U-shaped pipe by negative pressure, and a large amount of wastewater in the mixture enters the drainage pipeline through the water volume measuring mechanism. Controlling the first high-pressure gate valve can control the slag discharge amount, and controlling the second high-pressure gate valve can adjust the negative pressure magnitude to extract harmful gases and drain water. Closing the second high-pressure gate valve and the third high-pressure gate valve can directly measure the water pressure according to the positive pressure gauge. Opening the third gate valve can measure the water discharge amount according to the flow meter. When the drainage pressure permits, opening the fourth high-pressure gate valve connects the mixture and harmful gases deeper in the borehole for further drainage work.

[0015] Adopting this technical solution, in this way during the exploration and drainage process, abnormal phenomena of gas and toxic and harmful gases can be greatly avoided during the exploration and drainage work. Moreover, the measured water pressure is real and reliable, and the water pressure is controlled within a reasonable range, which can not only improve the drainage efficiency but also ensure the service life of the high-pressure water pipe. It can make the drainage smooth and effectively drain the old goaf water. It can also prevent external air from entering the goaf, reduce the fire prevention pressure in the goaf, improve the safety factor of the exploration and drainage work, and greatly avoid potential safety hazards. In summary, this process method has significant safety benefits, huge economic benefits, and greatly improved exploration and drainage efficiency.

[0016] The present invention will be described in more detail below with reference to the drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The content expressed in each drawing of this specification and the marks in the drawings will be briefly described below:

[0018] Figure 1 It is a schematic diagram of the device of the present invention;

[0019] The marks in the figure are: 1, borehole; 2, drilling tool; 3, sealing ring; 4, first exhaust pipe; 5, extraction pipeline; 6, slag discharge port; 7, first high-pressure gate valve; 8, flange; 9, U-shaped pipe; 10, second high-pressure gate valve; 11, negative pressure gauge; 12, second exhaust pipe; 13, positive pressure gauge; 14, high-pressure water pipe; 15, third high-pressure gate valve; 16, flow meter; 17, drainage pipeline; 18, fourth high-pressure gate valve; 19, slag discharge casing; 20, water-stop casing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will further elaborate in detail on the specific implementation of the present invention, such as the shapes, structures of various components involved, the mutual positions and connection relationships between various parts, the functions and working principles of each part, the manufacturing process, the operation and usage methods, etc., with reference to the accompanying drawings, to help those skilled in the art have a more complete, accurate, and in-depth understanding of the inventive concept and technical solution of the present invention.

[0021] Figure 1 A drilling and drainage device for water in old goaf areas shown in the figure includes a drill tool 2 for drilling water in old goaf areas and a borehole 1 during the drilling process of the drill tool 2. It is characterized in that it includes a water-stop casing 20 with an exhaust port and a slag discharge port 6, a water volume measurement mechanism, a blowout prevention and negative pressure extraction system, and a gas-water separation and drainage system. The inner wall surface of the borehole 1 is provided with a water-stop casing 20, and a sealing mechanism for the exhaust port and the slag discharge port 6 of the water-stop casing 20 is arranged in the borehole 1. The exhaust port at the top on one side of the water-stop casing 20 is connected to the intake port of the blowout prevention and negative pressure extraction system, and the slag discharge port 6 arranged at the bottom on one side of the water-stop casing 20 is connected to the inlet end of the gas-water separation and drainage mechanism through a provided slag discharge casing 19. The slag discharge casing 19 is connected to the inlet end of the gas-water separation and drainage system through a provided slag discharge volume adjustment mechanism; the outlet end of the gas-water separation and drainage system consists of a water outlet end and a gas outlet end. The gas outlet end of the gas-water separation and drainage system is connected to another provided intake port of the blowout prevention and negative pressure extraction system, and a water volume measurement mechanism is arranged at the water outlet end of the gas-water separation and drainage system.

[0022] The blowout prevention and negative pressure extraction system includes a first exhaust pipe 4, a second exhaust pipe 12, and a extraction pipeline 5 with negative pressure. The intake port of the first exhaust pipe 4 is connected to the exhaust port of the water-stop casing 20, and the outlet port of the exhaust pipe is connected to the intake port of the extraction pipeline 5; the intake port of the second exhaust pipe 12 is connected to the gas outlet end of the gas-water separation and drainage system, and the outlet port of the second exhaust pipe 12 is connected to another provided intake port of the extraction pipeline 5.

[0023] The gas-water separation and drainage system consists of a U-shaped pipe 9, a second high-pressure gate valve 10, a high-pressure water pipe 14, a negative pressure gauge 11, a positive pressure gauge 13, and a drainage pipeline. The gas outlet end at the top of one side pipe orifice of the U-shaped pipe 9 is connected to the intake port of the second exhaust pipe 12 through the second high-pressure gate valve 10 and the negative pressure gauge 11, and the second high-pressure gate valve 10 is arranged between the negative pressure gauge 11 and the gas outlet end of the U-shaped pipe 9; the water outlet end at the side of one side pipe orifice of the U-shaped pipe 9 is connected to the intake port of the drainage pipeline through the high-pressure water pipe 14, and a positive pressure gauge 13 and a water volume measurement mechanism are arranged on the high-pressure water pipe 14.

[0024] The positive pressure gauge 13 is arranged between the water outlet end of the U-shaped pipe 9 and the water volume measurement mechanism, and the water volume measurement mechanism is arranged between the positive pressure gauge 13 and the drainage pipeline 17.

[0025] The water volume measuring mechanism consists of a flowmeter 16 and a third high-pressure gate valve 15. The third high-pressure gate valve 15 is arranged between the positive pressure gauge 13 and the flowmeter 16, and the flowmeter 16 for reading the discharged water volume is arranged between the third high-pressure gate valve 15 and the water inlet of the drainage pipeline 17.

[0026] The sealing mechanism is a fourth high-pressure gate valve 18 for sealing and a sealing ring 3. The sealing ring 3 is arranged at one end of the drill hole 1 far from the drilling direction, the exhaust port and the slag discharge port 6 of the water stop casing 20, and the fourth high-pressure gate valve 18 is arranged at one end of the drill hole 1 close to the drilling direction.

[0027] The slag discharge volume adjusting mechanism is a first high-pressure gate valve 7 for controlling the slag discharge volume. The slag discharge casing 19 is connected to the inlet end of the U-shaped tube 9 through the first high-pressure gate valve 7.

[0028] Flange plates 8 are arranged at both ends of the first high-pressure gate valve 7, the second high-pressure gate valve 10, the third high-pressure gate valve 15 and the fourth high-pressure gate valve 18.

[0029] A flange plate 8 is arranged at one end of the sealing ring 3 close to the exhaust port of the water stop casing 20.

[0030] On the inner wall of the drill hole 1 left after the drill tool 2 drills, a water stop casing 20 is arranged. The harmful gas in the drill hole 1 is discharged into the extraction pipeline 5 through the exhaust port arranged at the top on one side of the water stop casing 20 by the negative pressure principle; the mixture in the drill hole 1 is discharged into the U-shaped tube 9 through the slag discharge port 6 at the bottom on one side of the water stop casing 20 through the slag discharge casing 19. After the mixture enters the U-shaped tube 9, according to the pressure difference, the gas in the mixture enters the extraction pipeline 5 from the exhaust end of the U-shaped tube 9 through the negative pressure, while a large amount of wastewater in the mixture enters the drainage pipeline 17 through the water volume measuring mechanism; controlling the first high-pressure gate valve 7 can control the slag discharge volume, controlling the second high-pressure gate valve 10 can adjust the negative pressure to extract harmful gas and drain water, closing the second high-pressure gate valve 10 and the third high-pressure gate valve 15 can directly measure the water pressure according to the positive pressure gauge 13, opening the third gate valve can measure the discharged water volume according to the flowmeter 16, and when the drainage pressure permits, opening the fourth high-pressure gate valve 18 connects the mixture and harmful gas deeper in the drill hole 1 for further drainage work.

[0031] Adopting this technical solution, in this way during the exploration and drainage process, it is possible to greatly avoid the abnormal phenomena of gas and toxic and harmful gases during the exploration and drainage work; and the measured water pressure is real and reliable, controlling the water pressure within a reasonable range can not only improve the drainage efficiency but also ensure the service life of the high-pressure water pipe; it can make the drainage smooth and effectively drain the old goaf water; it can also prevent external air from entering the goaf, reduce the fire prevention pressure in the goaf, improve the safety factor of the exploration and drainage work, and greatly avoid potential safety hazards. In summary, this process method has significant safety benefits, huge economic benefits, and greatly improved exploration and drainage efficiency.

[0032] The present invention has been described above in an exemplary manner with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-mentioned manner. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A drilling and drainage device for water in old goafs, comprising a drill tool for drilling water in old goafs and a borehole during the drilling process of the drill tool, characterized in that: It includes a water-stop casing with an exhaust port and a slag discharge port, a water volume measurement mechanism, an anti-blowout negative pressure extraction system, and a gas-water separation and drainage system. The inner wall surface of the drill hole is provided with a water-stop casing, and a sealing mechanism for the exhaust port and slag discharge port of the water-stop casing is arranged in the drill hole. The exhaust port at the top of one side of the water-stop casing is connected to the air inlet of the anti-blowout negative pressure extraction system, and the slag discharge port arranged at the bottom of one side of the water-stop casing is connected to the inlet end of the gas-water separation and drainage mechanism through a set slag discharge casing. The slag discharge casing is connected to the inlet end of the gas-water separation and drainage system through a set slag discharge volume adjustment mechanism; the outlet end of the gas-water separation and drainage system consists of a water outlet end and a gas outlet end. The gas outlet end of the gas-water separation and drainage system is connected to another set air inlet of the anti-blowout negative pressure extraction system, and a water volume measurement mechanism is arranged at the water outlet end of the gas-water separation and drainage system.

2. The drilling and drainage device for goaf water according to claim 1, characterized in that: The anti-blowout negative pressure extraction system includes a first exhaust pipe, a second exhaust pipe, and an extraction pipeline with negative pressure. The air inlet of the first exhaust pipe is connected to the exhaust port of the water-stop casing, and the air outlet of the exhaust pipe is connected to the air inlet of the extraction pipeline; the air inlet of the second exhaust pipe is connected to the gas outlet end of the gas-water separation and drainage system, and the air outlet of the second exhaust pipe is connected to another set air inlet of the extraction pipeline.

3. A drilling and drainage device for water in old goafs according to claim 2, characterized in that: The gas-water separation and drainage system is provided with a U-shaped pipe, a second high-pressure gate valve, a high-pressure water pipe, a negative pressure gauge, a positive pressure gauge, and a drainage pipeline. The gas outlet end at the top of one side pipe orifice of the U-shaped pipe is connected to the air inlet of the second exhaust pipe through the second high-pressure gate valve and the negative pressure gauge, and the second high-pressure gate valve is arranged between the negative pressure gauge and the gas outlet end of the U-shaped pipe; the water outlet end at the side of one side pipe orifice of the U-shaped pipe is connected to the water inlet of the drainage pipeline through the high-pressure water pipe, and a positive pressure gauge and the water volume measurement mechanism are arranged on the high-pressure water pipe.

4. A water drilling and drainage device for old goaf water according to claim 3, characterized in that: The positive pressure gauge is arranged between the water outlet end of the U-shaped pipe and the water volume measurement mechanism, and the water volume measurement mechanism is arranged between the positive pressure gauge and the drainage pipeline.

5. A water drilling and drainage device for old goaf water according to claim 4, characterized in that: The water volume measurement mechanism is provided with a flow meter and a third high-pressure gate valve. Among them, the third high-pressure gate valve is arranged between the positive pressure gauge and the flow meter, and the flow meter for reading the water discharge volume is arranged between the third high-pressure gate valve and the water inlet of the drainage pipeline.

6. The drilling and drainage device for goaf water according to claim 5, characterized in that: The sealing mechanism is provided with a fourth high-pressure gate valve for sealing and a sealing ring. The sealing ring is arranged at one end of the drill hole far from the drilling direction and the exhaust port and slag discharge port of the water-stop casing, and the fourth high-pressure gate valve is arranged at one end of the drill hole close to the drilling direction.

7. A water drilling and drainage device for goaf water according to claim 6, characterized in that: The slag discharge volume adjustment mechanism is provided with a first high-pressure gate valve for controlling the slag discharge volume, and the slag discharge casing is connected to the inlet end of the U-shaped pipe through the first high-pressure gate valve.

8. A water drilling and drainage device for goaf water according to claim 7, characterized in that: Flange plates are arranged at both ends of the first high-pressure gate valve, the second high-pressure gate valve, the third high-pressure gate valve, and the fourth high-pressure gate valve.

9. A water drilling and drainage device for goaf water according to claim 6, characterized in that: A flange plate is arranged at one end of the sealing ring close to the exhaust port of the water-stop casing.

10. A drilling and drainage method for water in old goafs, comprising a drilling and drainage device for water in old goafs according to any one of claims 1 to 9, characterized in that: The water-stop casing is arranged on the inner wall of the borehole left after the drilling tool drills. The harmful gas in the borehole is discharged into the extraction pipeline through the exhaust port arranged at the top of one side of the water-stop casing by the negative pressure principle; the mixture in the borehole is discharged into the U-shaped pipe through the slag discharge port at the bottom of one side of the water-stop casing through the slag discharge casing. After the mixture enters the U-shaped pipe, according to the pressure difference, the gas in the mixture enters the extraction pipeline through the exhaust end of the U-shaped pipe by the negative pressure, and a large amount of wastewater in the mixture enters the drainage pipeline through the water volume measuring mechanism; controlling the first high-pressure gate valve can control the slag discharge amount, controlling the second high-pressure gate valve can adjust the negative pressure size for extracting harmful gas and draining water, closing the second high-pressure gate valve and the third high-pressure gate valve can directly measure the water pressure according to the positive pressure gauge, opening the third gate valve can measure the water discharge amount according to the flowmeter. When the drainage pressure permits, opening the fourth high-pressure gate valve connects the mixture and harmful gas deeper in the borehole for further drainage work.

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