A device and method for pumping and draining accumulated water in a coal mine underground hole

A technology for coal mines and inclined holes, which is applied in earthwork drilling, drilling equipment, boreholes/well components, etc., can solve the problems of complex pumping and drainage equipment and low pumping and drainage efficiency, achieve remarkable pumping and drainage effects, and reduce hole wall collapse Risk, the effect of strong airtightness

Active Publication Date: 2022-07-19
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies in the prior art, the object of the present invention is to provide a pumping and drainage device for accumulated water in underground coal mine holes to solve the problems of complex pumping and drainage equipment and low efficiency of pumping and drainage in coal mines in the prior art

Method used

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  • A device and method for pumping and draining accumulated water in a coal mine underground hole
  • A device and method for pumping and draining accumulated water in a coal mine underground hole
  • A device and method for pumping and draining accumulated water in a coal mine underground hole

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Embodiment 1

[0076] This embodiment provides a device for pumping and draining accumulated water in a coal mine underground hole, such as Figure 1 to Figure 12 shown, including pumping drills and external manifolds installed inside and outside the boreholes in the coal mine;

[0077] The water pumping tool has a central channel and a double-layer pipe wall connecting the inside and outside of the borehole. From the radial direction of the central channel of the water pumping tool to the hole wall, there are a central channel and a water pumping tool separated by the double-layer pipe wall of the water pumping tool. annulus and borehole annulus;

[0078] The external manifold includes a negative pressure suction pipeline, a first gas injection pipeline and a second gas injection pipeline;

[0079] The negative pressure suction pipeline is connected to the central channel of the pumping drilling tool;

[0080] The first gas injection pipeline is connected to the annulus of the pumping dri...

Embodiment 2

[0134] This embodiment provides a device for pumping and draining accumulated water in a coal mine underground hole, such as Figure 1 to Figure 12 shown, including pumping drills and external manifolds installed inside and outside the boreholes in the coal mine;

[0135] The pumping drilling tool includes a pumping drill bit 1, an ejector-suction short-circuit 2, a double-wall drill pipe 3 and a double-wall air blower 4;

[0136] The external manifold includes: orifice pipe 5, orifice sealing device 6, pressure gauge 7, air pressure pipeline 8, first air supply pipeline 9, second air supply pipeline 10, first opening and closing valve 11, Two opening and closing valves 12, a first flow meter 13, a second flow meter 14, a gas-water separator 15, a drain opening and closing valve 16, a drain pipeline 17, and a negative pressure pipeline 18;

[0137] The pumping bit 1 is connected to the jet-suction short-circuit 2, the jet-suction short-circuit 2 is connected to the double-wal...

Embodiment 3

[0170] This embodiment provides a method for pumping and draining accumulated water in a coal mine underground hole, and the method adopts a device for pumping and draining the accumulated water in a coal mine underground hole as in Embodiment 1 or 2.

[0171] As a specific solution of this embodiment, the method for pumping and draining accumulated water in a coal mine underground hole in this embodiment includes the following steps:

[0172] Step 1: Connect the pumping drilling tool and the external manifold in sequence, and after the connection is complete, run the pumping drilling tool to the position where the water accumulates in the underground borehole of the coal mine;

[0173] Step 2: When the vertical depth of water accumulation in the underground borehole of the coal mine is less than 8m, start the negative pressure suction pipeline to extract the accumulated water through the central channel of the water pumping drilling tool;

[0174] Step 3: When the vertical de...

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Abstract

The invention provides a water pumping and draining device in a coal mine underground hole, which comprises a water pumping drilling tool and an external manifold respectively installed inside and outside the coal mine underground drilling hole. Drill bit, injection-suction short-circuit, double-wall drill pipe and double-wall air blower; the external manifold includes a negative pressure suction pipeline, a first gas injection pipeline and a second gas injection pipeline. The invention also provides a method for pumping and draining accumulated water in a coal mine underground hole. The device of the invention is adopted to utilize the negative pressure suction and drainage at the orifice, and the annular air injection of the drilling tool to drive the bottom of the hole to inject and suck short-circuit suction and drainage and drill The method of combining the hole and ring air with compressed air and drainage can effectively solve the problem of water accumulation in the underground hole of the coal mine, and the effect of pumping and drainage is remarkable; the whole system has stable connection, strong air tightness and stable operation; air is used as the power medium for pumping and drainage, and the hole wall The disturbance is small, which effectively reduces the risk of collapse of the borehole wall; the overall structure is simple, there is no complicated mechanical structure, there are few wearing parts, and the whole system has a long service life.

Description

technical field [0001] The invention belongs to the field of drilling equipment, relates to the treatment of accumulated water in a coal mine underground hole, and in particular relates to a device and method for pumping and draining the accumulated water in a coal mine underground hole. Background technique [0002] Underground gas in coal mines has now become the primary source of disasters for safety accidents in coal mines. People and property losses caused by gas explosions, coal and gas outbursts, gas poisoning and suffocation are very serious. Therefore, gas control must be given top priority. The main control method is to conduct pre-mining gas pre-draining through construction drilling holes. After the gas concentration reaches the safe mining standard, roadway excavation and working face mining can be carried out. According to the different drilling construction environment and mode of action, there will be different angles of extraction drilling. Due to the negati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/00E21B17/18E21B43/34E21B10/42E21B10/60
CPCE21B43/121E21B43/122E21B17/18E21B43/34E21B10/42E21B10/602
Inventor 杨冬冬李泉新赵江鹏刘建林王四一赵建国
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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