Movement Laws of Overlying Strata above a Fully Mechanized Coal Mining Face Backfilled with Gangue: A Case Study in Jiulishan Coal Mine in Henan Province, China

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left">Backfilling material</td><td class="align_center">Elastic modulus (GPa)</td><td class="align_center">Compressive strength (MPa)</td><td class="align_center">Tensile strength (MPa)</td><td class="align_center">Volume force (kN·m<sup>−3</sup>)</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">Sandstone</td><td class="align_center">16.2</td><td class="align_center">69.8</td><td class="align_center">5.97</td><td class="align_center">27</td></tr><tr><td class="align_left">Mudstone</td><td class="align_center">9.58</td><td class="align_center">38.9</td><td class="align_center">3.25</td><td class="align_center">27</td></tr><tr><td class="align_left">Siltstone</td><td class="align_center">9.26</td><td class="align_center">37.5</td><td class="align_center">3.16</td><td class="align_center">27</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Physical and mechanical parameters of backfilled gangue.</div>

Advances in Civil Engineering

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Table 3

Table 3: Movement Laws of Overlying Strata above a Fully Mechanized Coal Mining Face Backfilled with Gangue: A Case Study in Jiulishan Coal Mine in Henan Province, China 

Table 3 | Movement Laws of Overlying Strata above a Fully Mechanized Coal Mining Face Backfilled with Gangue: A Case Study in Jiulishan Coal Mine in Henan Province, China 