Failure Characteristics and Stability Control of Bolt Support in Thick-Coal-Seam Roadway of Three Typical Coal Mines in China

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left"> </td><td class="align_center">Rock stratum</td><td class="align_center">Thickness (m)</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left" rowspan="3">Roof</td><td class="align_center">Fine sandstone</td><td class="align_center">8.6</td></tr><tr><td class="align_center">Siltstone</td><td class="align_center">3.0</td></tr><tr><td class="align_center">Carbon mudstone</td><td class="align_center">0.79</td></tr><tr><td class="align_left" colspan="3"><hr/></td></tr><tr><td class="align_left">Coal</td><td class="align_center">4-2# coal</td><td class="align_center">6.4</td></tr><tr><td class="align_left" colspan="3"><hr/></td></tr><tr><td class="align_left" rowspan="2">Floor</td><td class="align_center">Fine sandstone</td><td class="align_center">0.5</td></tr><tr><td class="align_center">Sandy mudstone</td><td class="align_center">1.67</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Rock properties and thickness.</div>

Shock and Vibration

tab1

Table 1

Table 1: Failure Characteristics and Stability Control of Bolt Support in Thick-Coal-Seam Roadway of Three Typical Coal Mines in China 