水力压裂技术在煤矿坚硬难垮顶板中的应用

doi:10.11799/ce201904013

Abstract

Abstract: In view of the current situation and existing problems of hard and stable roof in coal mine, hydraulic fracturing technology is introduced. The technique is closed by a cross expansive packer and fracturing section is carried out by high pressure water, fracturing the rock mass in different positions of the roof and forming multiple cracks, and finally forming a crack network. In order to weaken the roof, with the advance of the working face, the roof lamination, sub collapse, the initial pressure strength of the old roof are weakened, and the safety of the working face is ensured. The crack growth can be seen from the construction site, and the opening pressure and expansion pressure of cracks in different fracturing sections can be directly read through the pressure curve.

CLC Number:

TD327.2

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http://www.coale.com.cn/EN/Y2019/V51/I4/54

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APPLICATION OF HYDRAULIC FRACTURING TECHNOLOGY IN HARD AND STABLE ROOF IN COAL MINE

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