Mechanism and Safety Mining Technology of Overall Instability-Induced Rockbursts of Multi-Coal Seam Spatially Isolated Working Face

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Rockburst hazard zone level</td><td class="align_center">Measures</td><td class="align_center">Parameters</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">Weak</td><td class="align_center">Monitoring</td><td class="align_center">—</td></tr><tr><td class="align_left">Medium</td><td class="align_center">Drilling relief with large diameter</td><td class="align_center">Hole depth 25 m, drilling diameter 120∼150 mm, hole spacing 2 m</td></tr><tr><td class="align_left">Strong</td><td class="align_center">Drilling relief with large diameter</td><td class="align_center">Hole depth 25 m, drilling diameter 120∼150 mm, hole spacing 1 m</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Prepressure relief measures and specific parameters of the two sides of the gate.</div>

Mathematical Problems in Engineering

tab2

Table 2

Table 2: Mechanism and Safety Mining Technology of Overall Instability-Induced Rockbursts of Multi-Coal Seam Spatially Isolated Working Face 