Study on the Upper Limit of Roof Failure in Soft Rock Roadway

<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">Fracture angle (°)</td><td class="align_center">Internal friction angle (°)</td><td class="align_center">Cohesion (MPa)</td><td class="align_center">Overburden density (N·m<sup>−3</sup>)</td><td class="align_center">Width of the roadway (m)</td><td class="align_center">Height of the roadway (m)</td><td class="align_center">Pressure coefficient</td><td class="align_center">Support strength (MPa)</td></tr><tr><td class="thead-hr" colspan="8"><hr/></td></tr><tr><td class="align_left">28</td><td class="align_center">34</td><td class="align_center">1.08</td><td class="align_center">25470</td><td class="align_center">4.2</td><td class="align_center">2.8</td><td class="align_center">1</td><td class="align_center">0.2</td></tr><tr class="table-tr"><td colspan="8"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Related parameters of the surrounding rock of tailgate.</div>

Shock and Vibration

tab1

Table 1

Table 1: Study on the Upper Limit of Roof Failure in Soft Rock Roadway 