Presplitting Blasting the Roof Strata to Control Large Deformation in the Deep Mine Roadway

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Partition</td><td class="align_center">The maximum pressure (MPa)</td><td class="align_center">The average pressure (MPa)</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">Upper area</td><td class="align_center">37.4</td><td class="align_center">30.5</td></tr><tr><td class="align_left">Middle area</td><td class="align_center">35.2</td><td class="align_center">29.2</td></tr><tr><td class="align_left">Lower area</td><td class="align_center">27.5</td><td class="align_center">15.6</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Working resistance of hydraulic support in the 3307 working face.</div>

Advances in Civil Engineering

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Table 1

Table 1: Presplitting Blasting the Roof Strata to Control Large Deformation in the Deep Mine Roadway 