Investigation of Relation between Fracture Scale and Acoustic Emission Time-Frequency Parameters in Rocks

<table class="fixed-width table-group" id="tab2"><tr><td><table class="table"><colgroup><col style="width:7.60em"/><col style="width:9.79em"/><col style="width:12.39em"/></colgroup><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left" rowspan="2">Sample number</td><td class="align_center" colspan="2">AE quiet period</td></tr><tr class="thead"><td class="align_center">AE event rate times/s</td><td class="align_center">Energy release percentage%</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">HSHG-1</td><td class="align_center">10</td><td class="align_center">80.05</td></tr><tr><td class="align_left">HSHG-2</td><td class="align_center">10</td><td class="align_center">81.33</td></tr><tr><td class="align_left">HSHG-3</td><td class="align_center">10</td><td class="align_center">93.31</td></tr><tr><td class="align_left">HSHG-4</td><td class="align_center">10</td><td class="align_center">75.46</td></tr><tr><td class="align_left">HSHG-5</td><td class="align_center">10</td><td class="align_center">89.22</td></tr><tr><td class="align_left">Average</td><td class="align_center">10</td><td class="align_center">83.87</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Characteristic of time-domain parameters of AE quiet period of granite.</div>

Shock and Vibration

tab2

Table 2

Table 2: Investigation of Relation between Fracture Scale and Acoustic Emission Time-Frequency Parameters in Rocks 