Experimental Study on Dynamic Response and Damage Evolution of Coal under Shocks by Multiple High-Pressure Air Blasting

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left">A mix ratio of specimen</td><td class="align_center" rowspan="2">Uniaxial compressive strength (MPa)</td><td class="align_center" rowspan="2">Density (g/cm<sup>3</sup>)</td><td class="align_center" rowspan="2">Elastic modulus (GPa)</td><td class="align_center" rowspan="2">Wave velocity (m/s)</td></tr><tr class="thead"><td class="align_left">Cement:sand:gypsum:water:perlite:foaming agent:mica</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">1 : 2.8 : 0.14 : 0.43 : 0.02 : 0.035 : 0.02</td><td class="align_center">12.18</td><td class="align_center">1.526</td><td class="align_center">2.52</td><td class="align_center">2152</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Mix ratio and mechanical properties of simulated coal.</div>

Geofluids

tab2

Table 2

Table 2: Experimental Study on Dynamic Response and Damage Evolution of Coal under Shocks by Multiple High-Pressure Air Blasting 