Mining capsule expansion pipe type static fracturing method

Abstract

The invention discloses a mining capsule expansion pipe type static fracturing method, and particularly relates to the field of mining, and the mining capsule expansion pipe type static fracturing method specifically comprises the following steps: S1, dividing a working area; s2, positioning and drilling; s3, drilling rod grooving; s4, pipeline connection; according to the method, the expansion pipe is designed, the purpose of fracturing the roof coal rock is achieved through the expansion amount of the expansion pipe, due to the fact that the high-pressure liquid is in the closed state in the inner cavity of the expansion pipe, drilling holes do not need to be plugged in the implementation process, and compared with an existing deep hole blasting technology, a high-pressure water injection technology and a carbon dioxide phase change fracturing technology, the construction efficiency is greatly improved. And the drilling hole blocking procedure is omitted, the labor amount is saved, and therefore the working efficiency is improved.

Description

technical field [0001] The invention relates to the field of mining, in particular to a mining capsule expansion tubular static fracturing method. Background technique [0002] Usually, with the advancement of the working face, the direct roof in the middle of the goaf can collapse naturally and fill the gob, but the gob is adjacent to the upper and lower ends of the trough (corner area), which is affected by the coal seam in the unmined area. The supporting effect will not collapse in time, forming a cantilever structure. The roof pressure in the corner area continues to increase, and roof accidents are very likely to occur, causing hidden dangers such as coal wall slats, floor bulging or gas accumulation. The roof at the falling corners and the management of the roof pressure are necessary measures to ensure the safety of the working face. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to propose a mining capsule expansion tubular static fract...

AI Technical Summary

Problems solved by technology

[0002] Usually, with the advancement of the mining face, the central part of the goaf can collapse naturally and fill the goaf, but the goaf is close to the upper and lower ends of the trench (corner area), which is affected by the coal seam in the unmined area. The support function will not collapse in time to form a cantilever structure. The pressure of the roof in the corner area will continue to increase, and roof accidents will easily occur, causing hidden dangers such as coal wall slabs, floor swelling, or gas accumulation. The roof at the corner and the management of the pressure on the roof are necessary measures to ensure the safety of the working face

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