The Relief Pressure and Permeability Improvement Mechanism of Huff Hydraulic Fracturing and Its Application

To improve the gas extraction effect of the low permeability coal seam, relief pressure and permeability improvement mechanism of conventional hydraulic fracturing was analyzed, and huff hydraulic fracturing was proposed and its relief pressure and permeability improvement mechanism was studied by taking Hebi Zhongtai Mining Company as the field test site, the results show that huff hydraulic fracturing is the best way in hydraulic strengthening to achieve volume reconstruction.