Study on Roof-Coal Caving Characteristics with Complicated Structure by Fully Mechanized Caving Mining

<table class="table-group" id="tab8"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_center" colspan="2">Coal caving distance</td><td class="align_center">One knife one falling</td><td class="align_center">Two knife one falling</td><td class="align_center">Three knife one falling</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left" rowspan="2">The number of coal arching times each time</td><td class="align_center">Maximum</td><td class="align_center">3</td><td class="align_center">6</td><td class="align_center">2</td></tr><tr><td class="align_center">Average</td><td class="align_center">0.43</td><td class="align_center">2</td><td class="align_center">0.4</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Contrast ratio of arching at different coal caving distances.</div>

Shock and Vibration

tab8

Table 8

Table 8: Study on Roof-Coal Caving Characteristics with Complicated Structure by Fully Mechanized Caving Mining 