Characteristics of Stress, Crack Evolution, and Energy Conversion of Gas-Containing Coal under Different Gas Pressures

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td class="align_left">Average normal stiffness/MPa</td><td class="align_center">20.0460</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">Average tangential stiffness/MPa</td><td class="align_center">7.1590</td></tr><tr><td class="align_left">Average breaking force/N</td><td class="align_center">11.8780</td></tr><tr><td class="align_left">Average shear resistance/N</td><td class="align_center">37.6636</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Microscopic parameters for numerical simulation.</div>

Geofluids

tab1

Table 1

Table 1: Characteristics of Stress, Crack Evolution, and Energy Conversion of Gas-Containing Coal under Different Gas Pressures 