Study on Distribution Characteristics of Damage Range along Smooth Blasting Hole Based on PPV

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td class="align_left">PPV (cm/s)</td><td class="align_center">Rock damage effect</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">&lt;25</td><td class="align_center">Intact rock without crack</td></tr><tr><td class="align_left">25∼63.5</td><td class="align_center">Producing a slight tensile crack</td></tr><tr><td class="align_left">63.5∼254</td><td class="align_center">Producing a serious tensile crack and some radial cracks</td></tr><tr><td class="align_left">&gt;254</td><td class="align_center">Completely fractured rock</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Rock damage effect under different PPV.</div>

Mathematical Problems in Engineering

tab1

Table 1

Table 1: Study on Distribution Characteristics of Damage Range along Smooth Blasting Hole Based on PPV 