Experimental study on the seepage characteristics of bituminous coal under the conditions of liquid nitrogen fracturing

In coalbed methane (CBM) exploitation, liquid nitrogen (LN 2 ) fracturing has attracted much attention as a promising and effective means to enhance coal seam permeability. Considering the bituminous coal in the Xutuan coal mine of Anhui Province, China, the permeability characteristics of coal samples under different pressure and stress conditions, and a single LN 2 treatment and cyclic fracturing conditions were studied. Additionally, an...