Effect of Shaft Pillar Extraction on Stability of Main Shaft: A Case Study at Xincheng Gold Mine, China

<table class="fixed-width table-group" id="tab8"><tr><td><table class="table"><colgroup><col style="width:5.57em"/><col style="width:7.22em"/><col style="width:10.11em"/><col style="width:6.89em"/><col style="width:5.37em"/><col style="width:10.73em"/><col style="width:7.32em"/></colgroup><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr class="thead"><td class="align_left">Material</td><td class="align_center">Density/kg/m<sup>3</sup></td><td class="align_center">Young’s modulus/GPa</td><td class="align_center">Poisson’s ratio</td><td class="align_center">UCS/MPa</td><td class="align_center">Internal friction angle/°</td><td class="align_center">Cohesion/MPa</td></tr><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr><td class="align_left">Backfilling</td><td class="align_center">2020</td><td class="align_center">1.21</td><td class="align_center">0.28</td><td class="align_center">2</td><td class="align_center">40</td><td class="align_center">0.5</td></tr><tr class="table-tr"><td colspan="7"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Backfilling mechanical parameters in the numerical simulation.</div>

Mathematical Problems in Engineering

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Table 8

Table 8: Effect of Shaft Pillar Extraction on Stability of Main Shaft: A Case Study at Xincheng Gold Mine, China 