Mechanical Analysis of Mining Stress Transfer on Isolated Island Face in Extra-Thick Fully Mechanized Top-Coal Caving Mining

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left">Medium name</td><td class="align_center">Shear modulus (GPa)</td><td class="align_center">Bulk modulus (GPa)</td><td class="align_center">Friction angle (°)</td><td class="align_center">Dilatancy angle (°)</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">Goaf medium</td><td class="align_center">7.78</td><td class="align_center">5.83</td><td class="align_center">12</td><td class="align_center">8</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Mechanical parameters of the goaf medium in the double-yield model.</div>

Geofluids

tab2

Table 2

Table 2: Mechanical Analysis of Mining Stress Transfer on Isolated Island Face in Extra-Thick Fully Mechanized Top-Coal Caving Mining 