Liang, Yunpei; Tan, Youting; Wang, Fakai; Luo, Yongjiang; … - In: Energy Reports 6 (2020), pp. 550-561
The method of improving permeability of coal seams by freeze-fracturing is presented to accelerate the diffusion of … nuclear magnetic resonance (NMR) and scanning electron microscopy (SEM), and a permeability-calculation model was employed to … estimate the permeability of coal sample. The pore size distribution, porosity, and permeability of coal before and after …