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Drainage Method of Large-diameter Directional Long Drilling Holes on the Roof of Gas Erupted from Mining Body

A technology with long boreholes and large diameters, which is applied in the fields of mining fluids, gas discharge, and mining equipment. It can solve problems that affect the release of high-yield potential, large engineering workload, and low efficiency, so as to improve the scope of application, reduce gas concentration, and improve The effect of extraction success rate

Active Publication Date: 2021-06-04
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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Problems solved by technology

[0002] With the increase of the mining intensity and coal seam depth of the working face, the amount of gas gushing out from the mining-affected body (referred to as the mining body) near the working face increases sharply. Hole drainage, etc.) has a large amount of work and low efficiency, which seriously affects the release of high production potential. Especially after the state implements regulations such as simplified ventilation and removal of tail lanes, this contradiction has become more prominent. It is urgent to find more economical and efficient mining areas for gas gushing Drainage technology

Method used

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  • Drainage Method of Large-diameter Directional Long Drilling Holes on the Roof of Gas Erupted from Mining Body
  • Drainage Method of Large-diameter Directional Long Drilling Holes on the Roof of Gas Erupted from Mining Body
  • Drainage Method of Large-diameter Directional Long Drilling Holes on the Roof of Gas Erupted from Mining Body

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Embodiment Construction

[0041] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0042] Such as figure 1 As shown, the extraction method of large-diameter directional long drilling holes on the gas roof gushing out of the mining body according to the present invention specifically includes the following steps:

[0043] S1: Calculate and determine the basic parameters of large-diameter directional long drilling on the roof, including the longitudinal height of the hole layout area, the number of drilling holes, the selection of drilling layers in the horizontal section and the spatial layout, drilling site and drilling parameters;

[0044] (1) Determination of the vertical height of the hole layout area

[0045] In order to effectively control the gas in the upper corner, the long drilling holes for drainage should be arranged in the roof strata near the return air roadway of the working face. In order to ensure the ex...

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Abstract

The invention relates to a large-diameter directional long drilling method for gas gushing out from a mining body, and belongs to the technical field of coal mining. The method includes the following steps: S1: Calculating and determining the basic parameters of large-diameter directional long drilling on the roof; S2: Before mining in the working face, drill the hole upwards at a large inclination angle to the rock formation of the coal seam roof; S3: Use directional technology to gradually adjust The drilling angle is such that the horizontal section of the borehole is arranged along the advancing direction of the working face, and then the gas drainage is completed. The invention can improve the success rate of drainage in large-diameter and directional long boreholes on the top plate, further reduce the gas concentration of the working face, improve the safety factor of the working environment, and increase economic benefits.

Description

technical field [0001] The invention belongs to the technical field of coal mine mining, and relates to a large-diameter directional long drilling method for gas gushing out from a mining body. Background technique [0002] With the increase of the mining intensity and coal seam depth of the working face, the amount of gas gushing out from the mining-affected body (referred to as the mining body) near the working face increases sharply. Hole drainage, etc.) has a large amount of work and low efficiency, which seriously affects the release of high production potential. Especially after the state implements regulations such as simplified ventilation and removal of tail lanes, this contradiction has become more prominent. It is urgent to find more economical and efficient mining areas for gas gushing Extraction technology. [0003] High-level drilling on the roof is one of the effective technical means to control gas in goafs. The current directional drilling equipment in coal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F7/00E21B43/00G06F30/20
Inventor 李日富林府进付军辉王然孙海涛张玉明晁建伟贾泉敏孙锐耿延辉郭恒刘洋吕伟伟江万刚刘文
Owner CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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