Use of Acoustic Emission for the Detection of Brittle Rock Failure under Various Loading Rates

<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">Sample number</td><td class="align_center">Accumulative number of AE events during preloading</td><td class="align_center">Reduction of wave velocity due to preloading (km/s)</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">#1</td><td class="align_center">13</td><td class="align_center">0.20</td></tr><tr><td class="align_left">#5</td><td class="align_center">12</td><td class="align_center">0.09</td></tr><tr><td class="align_left">#8</td><td class="align_center">14</td><td class="align_center">0.43</td></tr><tr><td class="align_left">#9</td><td class="align_center">12</td><td class="align_center">0.14</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>AE events and reduction of the wave velocity due to preloading.</div>

Advances in Civil Engineering

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Table 2

Table 2: Use of Acoustic Emission for the Detection of Brittle Rock Failure under Various Loading Rates 