Study on Impact Tendency of Coal and Rock Mass Based on Different Stress Paths

<table class="table-group" id="tab5"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left">Category</td><td class="align_center">I</td><td class="align_center">II</td><td class="align_center">III</td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">Impact tendency</td><td class="align_center">No</td><td class="align_center">Weak</td><td class="align_center">Strong</td></tr><tr><td class="align_left">Bending energy index (kJ)</td><td class="align_center"><i>U</i><sub><i>WQS</i></sub> ≤ 15</td><td class="align_center">15 &lt; <i>U</i><sub><i>WQS</i></sub> ≤ 120</td><td class="align_center"><i>U</i><sub><i>WQS</i></sub> &gt; 120</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Classification of rock impact tendency.</div>

Advances in Civil Engineering

tab5

Table 5

Table 5: Study on Impact Tendency of Coal and Rock Mass Based on Different Stress Paths 