Evaluation Method of Water Hazard Control Effect of Coal Seam Floor in Deep Mining: Sequence Verification Evaluation

<table class="table-group" id="tab7"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left">No.</td><td class="align_center">Water injection pressure (MPa)</td><td class="align_center">Dispersion radius (m)</td><td class="align_center">Maximum water resistance coefficient (MPa/m)</td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">D-1</td><td class="align_center">6</td><td class="align_center">47.19</td><td class="align_center">0.1271</td></tr><tr><td class="align_left">D-2</td><td class="align_center">6</td><td class="align_center">46.82</td><td class="align_center">0.1282</td></tr><tr><td class="align_left">D-3</td><td class="align_center">7</td><td class="align_center">47.51</td><td class="align_center">0.1473</td></tr><tr><td class="align_left">D-4</td><td class="align_center">7</td><td class="align_center">51.53</td><td class="align_center">0.1359</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Table of water resistance coefficient of 1101 coalface floor.</div>

Geofluids

tab7

Table 7

Table 7: Evaluation Method of Water Hazard Control Effect of Coal Seam Floor in Deep Mining: Sequence Verification Evaluation 