Rapid pressure relief extraction method for short drill hole of fully mechanized coal mining face

A technology of fully mechanized mining face and working face, which is applied in drilling equipment and methods, drill pipes, drill pipes, etc., can solve the problems of gas control difficulties in mechanized mining face, and achieve increased recovery output, good practicability, and gas The effect of reducing the amount of gushing

Active Publication Date: 2022-03-18
中煤昔阳能源有限责任公司白羊岭煤矿
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  • Claims
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AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the present invention is to provide a quick pressure-relieving and drainage method for short boreholes in fully mechanized mining working

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  • Rapid pressure relief extraction method for short drill hole of fully mechanized coal mining face
  • Rapid pressure relief extraction method for short drill hole of fully mechanized coal mining face
  • Rapid pressure relief extraction method for short drill hole of fully mechanized coal mining face

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Embodiment Construction

[0024] In order to make the technical means, creative features, goals and functions achieved by the present invention clearer and easier to understand, the present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments:

[0025] In order to explain the technical solution of the present invention, a specific construction scene is provided here. There is a specific working face, the fully mechanized mining face can adopt a strike length of 1400 meters, and an inclined length of 240m (0-900m advancing range) / 140m (900-1400m advancing range), this working face adopts full-height full-mechanized mining technology with one-time mining, and the whole caving method manages the roof. The west side of the 0-710m advance range of the working face is the 15116 goaf, and the west side of the 15116 working face within the 710-1400m advance range is not mined. The oblique structure of the working face is as follows: the overall shap...

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Abstract

The invention provides a rapid pressure relief extraction method for a short drill hole of a fully mechanized coal mining face. A plurality of discharge drill holes and water injection drill holes are formed in the construction part of the working face; punching from two ends of the working face along the coal side of the working face; after drilling construction is completed, a rapid gas hole packer and a PVC pipe are used for hole sealing, and after drilling and hole sealing are completed, continuous extraction is conducted immediately; gas extraction rubber hoses are continuously connected to joints of gas extraction pipelines of the track gate road and the rubber belt gate road and are connected into a working face and connected with gas extraction drill holes, the drill hole construction inclination angle is the same as the coal seam trend, and the drill holes are arranged below the middle portions of the discharge drill holes; a water injection hole packer is used for hole sealing through pressure expansion; the water injection pressure is controlled to be 6-10 MPa, water injection is stopped when water flows out of the coal wall or the water injection pressure is reduced by 30%, and if the water injection amount of a single hole is smaller than 0.8 m < 3 >, water injection drill holes are additionally drilled in the positions 2.0 m close to the drill holes for water injection again. The method can well solve the gas control problem of the mechanical stope face, and is safe and reliable.

Description

technical field [0001] The invention relates to a coal mine gas prevention technology, more specifically, relates to a quick pressure relief extraction method for short boreholes in a fully mechanized mining face. Background technique [0002] The increase of gas gushing out during the syncline structure of the fully mechanized mining face will cause great potential safety hazards. In the prior art, although some specific drainage methods have been drawn up according to the construction environment, the efficiency is not high and the drainage is not sufficient , the comprehensive effect is unsatisfactory, and still cannot deal with the difficult problem of gas control well. Therefore, in order to effectively control, based on the existing drainage construction technology, on the basis of making full use of gas drainage drilling, it is urgent for those skilled in the art to explore a new drainage process to effectively solve the problem of mechanized mining face. Gas control...

Claims

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Application Information

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IPC IPC(8): E21F7/00E21B7/00E21B7/04E21B10/43E21B17/046E21B17/04E21B17/03
CPCE21F7/00E21B7/00E21B7/04E21B10/43E21B17/046E21B17/04E21B17/03
Inventor 武新文吕人杰潘如小王斌荣刘少泽李志斌张浩刘杰李顺彬杜政杰张维锦宋志卿
Owner 中煤昔阳能源有限责任公司白羊岭煤矿
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