Influence of Incremental Impact on the Damage of Coal-Rock under Unidirectional Constraint

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left">Sampling period (<i>μ</i>s)</td><td class="align_center">Transmitting voltage (V)</td><td class="align_center">Measuring point spacing (mm)</td><td class="align_center">Test surface</td><td class="align_center">Test mode</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">0.5</td><td class="align_center">500</td><td class="align_center">70</td><td class="align_center">Surface</td><td class="align_center">Opposite measurement</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Ultrasonic system parameter setting.</div>

Advances in Civil Engineering

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Table 1

Table 1: Influence of Incremental Impact on the Damage of Coal-Rock under Unidirectional Constraint 