Study on Failure Mechanism and Control Technology of Roadway Surrounding Rock under Complex Occurrence Coal Seam

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left">Test hole number</td><td class="align_center">Horizontal principal stress/MPa</td><td class="align_center">Vertical principal stress/MPa</td><td class="align_center">Lateral pressure coefficient</td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">ZL-1</td><td class="align_center">8.6</td><td class="align_center">6.5</td><td class="align_center">1.3</td></tr><tr><td class="align_left">ZL-2</td><td class="align_center">9.8</td><td class="align_center">5.4</td><td class="align_center">1.8</td></tr><tr><td class="align_left">Mean</td><td class="align_center">9.2</td><td class="align_center">6.0</td><td class="align_center">1.5</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Horizontal and vertical stress data table.</div>

Geofluids

tab1

Table 1

Table 1: Study on Failure Mechanism and Control Technology of Roadway Surrounding Rock under Complex Occurrence Coal Seam 