Study on the Technology of Enhancing Permeability by Millisecond Blasting in Sanyuan Coal Mine

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left">Borehole number</td><td class="align_center">Gushing law qt = qoe−αt</td><td class="align_center">Initial gas emission intensity m3/(min·100 m)−1</td><td class="align_center">Attenuation coefficient of natural gas flow in the borehole</td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">#11</td><td class="align_center">qt = 0.4175e−0.03548t</td><td class="align_center">0.4175</td><td class="align_center">0.03548</td></tr><tr><td class="align_left">#15</td><td class="align_center">qt = 0.1045e−0.10966t</td><td class="align_center">0.1045</td><td class="align_center">0.10966</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>1312 Results of natural gas gushing from a 100-meter borehole of the working face.</div>

Mathematical Problems in Engineering

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Table 3

Table 3: Study on the Technology of Enhancing Permeability by Millisecond Blasting in Sanyuan Coal Mine 