Study on Temporal and Spatial Characteristics of Overlying Strata in the Deep Coal Mining Process

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left" rowspan="2">Stress concentration factor</td><td class="align_center" colspan="2">Fitting parameters</td><td class="align_center"><i>R</i><sup>2</sup></td></tr><tr class="thead"><td class="align_center"><i>a</i></td><td class="align_center"><i>b</i></td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">Forward</td><td class="align_center">1.55287</td><td class="align_center">0.01246</td><td class="align_center">0.9562</td></tr><tr><td class="align_left">Near</td><td class="align_center">1.36718</td><td class="align_center">0.00293</td><td class="align_center">0.9922</td></tr><tr><td class="align_left">Both sides</td><td class="align_center">1.3714</td><td class="align_center">0.00149</td><td class="align_center">0.9830</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Fitting parameters of the coal-rock stress concentration factor and mining dimension around the working face.</div>

Advances in Civil Engineering

tab3

Table 3

Table 3: Study on Temporal and Spatial Characteristics of Overlying Strata in the Deep Coal Mining Process 