Design and Application of Blasting Parameters for Presplitting Hard Roof with the Aid of Empty-Hole Effect

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="8"><hr/></td></tr><tr class="thead"><td class="align_left" rowspan="2">ρ0 (kg/m3)</td><td class="align_center" rowspan="2">D0 (m/s)</td><td class="align_center" colspan="6">Equation of state parameter</td></tr><tr class="thead"><td class="align_center">A (GPa)</td><td class="align_center">B (GPa)</td><td class="align_center">R1</td><td class="align_center">R2</td><td class="align_center">ω</td><td class="align_center">E0 (GPa)</td></tr><tr><td class="thead-hr" colspan="8"><hr/></td></tr><tr><td class="align_left">1200</td><td class="align_center">3200</td><td class="align_center">322</td><td class="align_center">3.95</td><td class="align_center">4.15</td><td class="align_center">0.96</td><td class="align_center">0.33</td><td class="align_center">4.192</td></tr><tr class="table-tr"><td colspan="8"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Shock and Vibration

tab1

Table 1

Table 1: Design and Application of Blasting Parameters for Presplitting Hard Roof with the Aid of Empty-Hole Effect 