A Study of the Differences in the Gas Diffusion and Migration Characteristics of Soft and Hard Coal in High Gas Coal Seams

<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" rowspan="2">Gas desorption parameters</td><td class="align_center" colspan="4">Soft coal and hard coal bodies of the different coal seams</td></tr><tr class="thead"><td class="align_center">No. 6 soft</td><td class="align_center">No. 6 hard</td><td class="align_center">No. 11 soft</td><td class="align_center">No. 11 hard</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">Initial speed of the gas desorption (ml/min)</td><td class="align_center">1993.26</td><td class="align_center">1775.02</td><td class="align_center">1924.53</td><td class="align_center">1695.36</td></tr><tr><td class="align_left">Gas desorption (ml)</td><td class="align_center">643.45</td><td class="align_center">539.74</td><td class="align_center">630.98</td><td class="align_center">532.02</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Gas desorption parameters of the soft coal and hard coal in the different coal seams.</div>

Advances in Civil Engineering

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Table 2

Table 2: A Study of the Differences in the Gas Diffusion and Migration Characteristics of Soft and Hard Coal in High Gas Coal Seams 