Drainage method and device

A technology of drainage device and predetermined position, applied in drainage, safety device, earthwork drilling, etc., can solve the problems of inability to discharge water in gas drainage holes, affecting gas drainage effect, and excessive water accumulation in gas drainage holes, etc., so as to improve operation efficiency. and gas extraction efficiency, saving operation time, and ensuring the effect of safe production

Active Publication Date: 2022-03-22
SHENHUA SHENDONG COAL GRP +1
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Problems solved by technology

However, during the drilling of gas drainage holes, water needs to be injected into the boreholes. After the operation is completed, there will be more accumulated water in the gas drainage holes.
At present, if the drainage method mainly relies on the negative pressure of drainage to discharge the accumulated water in the borehole, since the negative pressure of the mine gas negative pressure drainage system connected to the gas drainage hole is generally between 13KPa and 50KPa, it can only Drain the accumulated water with a vertical depth of about 5m, but it is impossible to discharge all the accumulated water in the gas drainage hole, which will easily affect the gas drainage effect

Method used

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Embodiment Construction

[0020] The technical solution of the present application will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Wherein the same components are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "inner" and "outer ” refer to directions towards or away from the geometric center of a particular part, respectively.

[0021] figure 1 Shows the flowchart of the drainage method of the present application, as figure 1 Shown, the drainage method that the application provides, it comprises:

[0022] S10, constructing a descending borehole on the coal wall of the roadway;

[0023] Such as figure 2 As shown, the downhole 100 is a borehole formed by drilling from a position close to the earth's surface to a position far away from the earth's surface.

[0024] In this e...

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Abstract

The application discloses a drainage method and device. The drainage method includes: constructing a downhole on the coal wall of the roadway; Fill the hole with water; perform anti-reflection operation on the downhole; inject high-pressure gas into the drill pipe, and the high-pressure gas enters the downhole through the air outlet between the drill pipe and the anti-reflection equipment, and the downhole Drain the accumulated water inside. Using this application can not only solve the problem of unclean water accumulation in the existing gas drainage holes, but also realize the integrated construction of anti-reflection and drainage, which can greatly improve the operation efficiency and gas drainage efficiency, save operation time, and ensure Mine safety production.

Description

technical field [0001] The application relates to the technical field of coal mines, in particular to a drainage method and device. Background technique [0002] More than 95% of coal seams in China are high-gas and low-permeability coal seams, and most of the gas drainage needs to be drilled with gas drainage holes. However, during the drilling of the gas drainage hole, water needs to be injected into the borehole. After the operation is completed, there will be more water in the gas drainage hole. At present, if the drainage method mainly relies on the negative pressure of drainage to discharge the accumulated water in the borehole, since the negative pressure of the mine gas negative pressure drainage system connected to the gas drainage hole is generally between 13KPa and 50KPa, it can only Draining the accumulated water with a vertical depth of about 5m cannot completely discharge the accumulated water in the gas drainage hole, which will easily affect the gas drainage...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F16/00E21F7/00E21B43/26
CPCE21F16/00E21F7/00E21B43/26
Inventor 安世岗张永民李鹏赵有志陈殿赋
Owner SHENHUA SHENDONG COAL GRP
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