TY - JOUR
TI - Numerical simulation for fracture network evolution in coal-bearing gas reservoir reconstruction based on damage theory
AU - Lin Hai-Xiao
AU - Pan Qiu-Yu
AU - Yao Bang-Hua
AU - Shen Wen-Long
AU - Yang Feng
JN - Thermal Science
PY - 2021
VL - 25
IS - 6
SP - 4423
EP - 4429
PT - Article
AB - Based on the characteristics of mechanical response of coal rock under  loading, an elastic-brittle damage constitutive relation of coal rock has  been proposed, which has been extended to the 3-D stress state, based on the  geological strength index. Besides, a numerical calculation method based on  the elastic-brittle damage the­ory has been developed, by analyzing the  seepage-stress coupling effect. Then, a computing program for fracture  network transformation has been composed to perform numerical simulation of  forming process of coal rock under different working conditions, by the APDL  language in the ANSYS software platform. The mechanical mechanism of  fracture network forming process of coal rock has been further analyzed.