Experimental Investigation on Hard Rock Breaking with Fiber Laser: Surface Failure Characteristics and Perforating Mechanism

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr class="thead"><td class="align_left">Rock sample</td><td class="align_center" colspan="6">Power (W)</td></tr><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr><td class="align_left">Basalt</td><td class="align_left"> </td><td class="align_left"> </td><td class="align_left"> </td><td class="align_left"> </td><td class="align_left"> </td><td class="align_left"> </td></tr><tr><td class="align_left">Sandstone</td><td class="align_center">20</td><td class="align_center">25</td><td class="align_center">30</td><td class="align_center">35</td><td class="align_center">40</td><td class="align_center">45</td></tr><tr><td class="align_left">Granite</td><td class="align_left"> </td><td class="align_left"> </td><td class="align_left"> </td><td class="align_left"> </td><td class="align_left"> </td><td class="align_left"> </td></tr><tr class="table-tr"><td colspan="7"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Experimental parameters of laser power (irradiation time 15 s).</div>

Advances in Civil Engineering

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Table 3

Table 3: Experimental Investigation on Hard Rock Breaking with Fiber Laser: Surface Failure Characteristics and Perforating Mechanism 