Open AccessNumerical simulation for fracture network evolution in coal-bearing gas reservoir reconstruction based on damage theory
Author(s) -
Hang Lin,
Qiu-Yu Pan,
Banghua Yao,
Wenlong Shen,
Yang Feng
Publication year - 2021
Publication title -
thermal science/thermal science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.339
H-Index - 43
eISSN - 2334-7163
pISSN - 0354-9836
DOI - 10.2298/tsci2106423l
Subject(s) - brittleness , coal , fracture (geology) , computer simulation , bearing (navigation) , stress (linguistics) , geology , coal mining , constitutive equation , coupling (piping) , geotechnical engineering , materials science , structural engineering , computer science , finite element method , composite material , engineering , simulation , linguistics , philosophy , artificial intelligence , waste management
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 the?ory 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.