Time-Dependence of Mechanical Property Alterations on Anthracite Coals Treated by Supercritical Carbon Dioxide

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Coal samples</td><td class="align_center">Cohesion (MPa)</td><td class="align_center">Internal friction angle (°)</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">Raw coal samples</td><td class="align_center">3.79</td><td class="align_center">47.69</td></tr><tr><td class="align_left">Samples treated with Sc-CO<sub>2</sub> for 12 h</td><td class="align_center">3.45</td><td class="align_center">39.33</td></tr><tr><td class="align_left">Samples treated with Sc-CO<sub>2</sub> for 48 h</td><td class="align_center">2.75</td><td class="align_center">33.98</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Cohesion and internal friction angle of coal samples under different conditions.</div>

Geofluids

tab2

Table 2

Table 2: Time-Dependence of Mechanical Property Alterations on Anthracite Coals Treated by Supercritical Carbon Dioxide 