Energy Evolution and Acoustic Emission Characteristics of Sandstone Specimens under Unloading Confining Pressure

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Serial number</td><td class="align_center"><i>σ</i><sub>1</sub>–<i>σ</i><sub>3</sub> (MPa)</td><td class="align_center"><i>σ</i><sub>3</sub> (MPa)</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">S5-1</td><td class="align_center">121.6</td><td class="align_center">5</td></tr><tr><td class="align_left">S10-1</td><td class="align_center">145.6</td><td class="align_center">10</td></tr><tr><td class="align_left">S15-1</td><td class="align_center">178.5</td><td class="align_center">15</td></tr><tr><td class="align_left">S20-1</td><td class="align_center">194.6</td><td class="align_center">20</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Experiment results of rock specimens under different confining pressures.</div>

Shock and Vibration

tab1

Table 1

Table 1: Energy Evolution and Acoustic Emission Characteristics of Sandstone Specimens under Unloading Confining Pressure 