Research Progress and Prospect of Hydraulic Fracturing Technologies in Coal Mine Underground

In this paper, current research progress of hydraulic fracturing technologies in coal mine underground in China was summarized from three aspects, such as fracturing methods, fracturing techniques and fracturing equipments. The analysis showed that it was necessary to strengthen the research on scope of hydraulic fracturing application conditions, cracks extension control technique, safety protection measures and device, hydraulic fracturing monitoring technique and so on.