Fracture Development and Multifield Coupling Evolution Law of Soft Overburden Rock in a Medium-Thick Coal Seam Mine

<table class="table-group" id="tab5"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left">Working surface</td><td class="align_center">Average thickness of coal seam (m)</td><td class="align_center">Three lower regulations (m)</td><td class="align_center">Empirical analogy (m)</td><td class="align_center">Network parallel electricity method (m)</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">50105</td><td class="align_center">3</td><td class="align_center">39.1</td><td class="align_center">53.0</td><td class="align_center">53.7</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Height of overlying rock fracture development.</div>

Geofluids

tab5

Table 5

Table 5: Fracture Development and Multifield Coupling Evolution Law of Soft Overburden Rock in a Medium-Thick Coal Seam Mine 