Research on Optimization of Large Flow Hydraulic Punching Process in Zhaozhuang Mine

<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">Condition of borehole</td><td class="align_center">Moisture content of surrounding coal (%)</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left" rowspan="2">Without blockage</td><td class="align_center">1</td></tr><tr><td class="align_center">1.4</td></tr><tr><td class="align_center" colspan="2"><hr/></td></tr><tr><td class="align_left" rowspan="2">With blockage</td><td class="align_center">5.2</td></tr><tr><td class="align_center">5.7</td></tr><tr><td class="align_center" colspan="2"><hr/></td></tr><tr><td class="align_left" rowspan="2">With blockage and causing drill pipe dropping</td><td class="align_center">8.4</td></tr><tr><td class="align_center">9.2</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Moisture contents of coal as a function of the condition of boreholes.</div>

Geofluids

tab4

Table 4

Table 4: Research on Optimization of Large Flow Hydraulic Punching Process in Zhaozhuang Mine 