Quantitative Identification of the Water Resistance Capacity of Composite Strata in Mining Coal Seam Floors

<table class="table-group" id="tab4"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td class="align_left">Lithology</td><td class="align_center">Conversion factor (MPa/m)</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">Mudstone, marl, clay, shale</td><td class="align_center">0.05</td></tr><tr><td class="align_left">Sand shale</td><td class="align_center">0.07</td></tr><tr><td class="align_left">Sandstone, no karst limestone, marl</td><td class="align_center">0.10</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Conversion coefficient of test compressive strength for each lithology.</div>

Geofluids

tab4

Table 4

Table 4: Quantitative Identification of the Water Resistance Capacity of Composite Strata in Mining Coal Seam Floors 