Study of Instability Mechanism and Roof Caving Mode of Cementing Filling Stope: The Case Study of a Nonferrous Metal Mine in China

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr class="thead"><td class="align_left">Joint type</td><td class="align_center">Normal stiffness (GPa)</td><td class="align_center">Shear stiffness (GPa)</td><td class="align_center">Friction coefficient</td><td class="align_center">Cohesion (Pa)</td><td class="align_center">Tensile strength (Pa)</td></tr><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr><td class="align_left">Dominant joint of the gneiss</td><td class="align_center">15.0</td><td class="align_center">10.0</td><td class="align_center">0.1</td><td class="align_center">2.50<i>E</i> + 04</td><td class="align_center">1.00<i>E</i> + 04</td></tr><tr><td class="align_left">Boundary surface of the filling body approach</td><td class="align_center">15.0</td><td class="align_center">10.0</td><td class="align_center">0.1</td><td class="align_center">6.00<i>E</i> + 03</td><td class="align_center">4.00<i>E</i> + 03</td></tr><tr class="table-tr"><td colspan="6"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Microscopic parameters of the joints.</div>

Advances in Civil Engineering

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Table 3

Table 3: Study of Instability Mechanism and Roof Caving Mode of Cementing Filling Stope: The Case Study of a Nonferrous Metal Mine in China 