Stability Analysis of “Support-Surrounding Rock” System for Fully Mechanized Longwall Mining in Steeply Dipping Coal Seams

<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">Parameter</td><td class="align_center">Name</td><td class="align_center">value</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">a</td><td class="align_center">Width of support</td><td class="align_center">1.6 m</td></tr><tr><td class="align_left">c</td><td class="align_center">Length of support base</td><td class="align_center">3 m</td></tr><tr><td class="align_left">h0</td><td class="align_center">Height of support center of gravity</td><td class="align_center">b/2 m</td></tr><tr><td class="align_left">G</td><td class="align_center">Weight of support</td><td class="align_center">15 × 9.8 kN</td></tr><tr><td class="align_left">k0</td><td class="align_center">Foundation coefficient of floor</td><td class="align_center">1.0 × 105 kN/m3</td></tr><tr><td class="align_left">P</td><td class="align_center">Setting load of support</td><td class="align_center">5,000 kN</td></tr><tr><td class="align_left">μ1</td><td class="align_center">Coefficient of friction between support and roof</td><td class="align_center">0.3</td></tr><tr><td class="align_left">μ2</td><td class="align_center">Coefficient of friction between support and floor</td><td class="align_center">0.3</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Physical parameters used in the model.</div>

Shock and Vibration

tab2

Table 2

Table 2: Stability Analysis of “Support-Surrounding Rock” System for Fully Mechanized Longwall Mining in Steeply Dipping Coal Seams 