Improving the permeability of coal seam with pulsating hydraulic fracturing technique: A case study in Changping coal mine, China

•To improve the gas permeability of coal seam, the industrial experiment of pulsating hydraulic fracturing (PHF) were carried out.•The pulsating peak pressure is the main influencing factor of the fracturing radius.•The initial gas concentration of the fractured hole and the guide hole are 1.2–1.8 t...

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Veröffentlicht in:Process safety and environmental protection 2018-07, Vol.117, p.565-572
Hauptverfasser: Guanhua, Ni, Hongchao, Xie, Zhao, Li, Lingxun, Zhuansun, Yunyun, Niu
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Sprache:eng
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