Abstract
With the development and extension of the mine, the mine gas, water, ground pressure and fire disasters further deteriorated, seriously affecting the safe and efficient production of the mine. Combining with the actual geological conditions, this paper analyses the feasibility of large diameter directional drilling construction on the roof of working face, calculates the construction horizon of directional drilling, and through field investigation, analyses the construction effect, extraction effect and cost comparison. Comprehensive comparison shows that large diameter directional drilling on roof can shorten the construction period of gas control engineering in working face, alleviate the situation of tense replacement of working face, reduce the amount of gas control roadway engineering, and save the cost of gas control engineering.
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