Influence of depressurization rate on gas production capacity of high-rank coal in the south of Qinshui Basin, China

SU Xuefeng,LIU Yan,CUI Zhouqi,ZHANG Jianguo,YU Li,WANG Kai

Fig. 6. Comprehensive comparison of changes in pressure and gas production at both ends of the sample under different pressure reduction rates. (a) Pressure curve at both ends of the sample at the depressurization rate of 0.3 MPa/d; (b) Pressure curve at both ends of the sample at the depressurization rate of 0.5 MPa/d; (c) Curve of gas production at the depressurization rate of 0.3 MPa/d; (d) Curve of gas production at the depressurization rate of 0.5 MPa/d; (e) Pressure curve at both ends of the sample at the depressurization rate of 1.0 MPa/d; (f) Pressure curve at both ends of the sample at the depressurization rate of 3.0 MPa/d; (g) Curve of gas production at the depressurization rate of 1.0 MPa/d; (h) Curve of gas production at the depressurization rate of 3.0 MPa/d.