Stability Mechanism and Control Factors on Equipment Removal Area under “Goaf-Roof-Coal” Structure

<table class="table-group" id="tab4"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left">Bulk modulus (MPa)</td><td class="align_center">Shear modulus (MPa)</td><td class="align_center">Cohesion (MPa)</td><td class="align_center">Internal friction angle/°</td><td class="align_center">Bulk density (kN.m<sup>−3</sup>)</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">150</td><td class="align_center">13888</td><td class="align_center">0.001</td><td class="align_center">5</td><td class="align_center">19.0</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Advances in Civil Engineering

tab4

Table 4

Table 4: Stability Mechanism and Control Factors on Equipment Removal Area under “Goaf-Roof-Coal” Structure 