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

<table class="table-group" id="tab6"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Rock stratum</td><td class="align_center">Bending energy index (kJ)</td><td class="align_center">Impact tendency classification</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">Argillaceous sandstone</td><td class="align_center">18.35</td><td class="align_center">II</td></tr><tr><td class="align_left">Coal</td><td class="align_center">1.19</td><td class="align_center">I</td></tr><tr><td class="align_left">Silty sandstone</td><td class="align_center">21.20</td><td class="align_center">II</td></tr><tr><td class="align_left">Bending energy index</td><td class="align_center">40.74</td><td class="align_center">II</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Calculation and categories of the coal seam and rock roof impact tendency index.</div>

Advances in Civil Engineering

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Table 6

Table 6: Study on Impact Tendency of Coal and Rock Mass Based on Different Stress Paths 