Mechanism of Support Optimization and Confined Blasting of Thick and Hard Rock with a Wedge-Structure Immediate Roof: A Case Study

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr class="thead"><td class="align_left">Parameter</td><td class="align_center">Geometric similarity ratio</td><td class="align_center">Gravimetric ratio</td><td class="align_center">Stress similarity ratio</td><td class="align_center">Dynamic load similarity ratio</td><td class="align_center">Time similarity ratio</td><td class="align_center">Speed similarity ratio</td></tr><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr><td class="align_left">Ratio</td><td class="align_center">1 : 120</td><td class="align_center">1 : 1.56</td><td class="align_center">1 : 187.2</td><td class="align_center">1 : 2695680</td><td class="align_center">1 : 10.95</td><td class="align_center">1 : 1314.53</td></tr><tr class="table-tr"><td colspan="7"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Principle for physical simulation model construction.</div>

Geofluids

tab1

Table 1

Table 1: Mechanism of Support Optimization and Confined Blasting of Thick and Hard Rock with a Wedge-Structure Immediate Roof: A Case Study 