Spatial and Temporal Distribution Law and Influencing Factors of the Mining-Induced Deformation and Failure of Gas Boreholes

<table class="table-group" id="tab4"><tr><td><table class="table"><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr class="thead"><td class="align_left"> </td><td class="align_center">Elasticity modulus (GPa)</td><td class="align_center">Cross-sectional area (m<sup>2</sup>)</td><td class="align_center">Grout cohesion (kN/m)</td><td class="align_center">Grout stiffness (GPa)</td><td class="align_center">Ultimate tensile capacity (kN)</td><td class="align_center">Pretensile (kN)</td></tr><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr><td class="align_left">Bolt</td><td class="align_center">200</td><td class="align_center">0.00038</td><td class="align_center">1400</td><td class="align_center">0.11</td><td class="align_center">152</td><td class="align_center">80</td></tr><tr><td class="align_left">Cable</td><td class="align_center">200</td><td class="align_center">0.00038</td><td class="align_center">1400</td><td class="align_center">0.11</td><td class="align_center">700</td><td class="align_center">120</td></tr><tr class="table-tr"><td colspan="7"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Material parameters for bolts and cables.</div>

Advances in Materials Science and Engineering

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Table 4

Table 4: Spatial and Temporal Distribution Law and Influencing Factors of the Mining-Induced Deformation and Failure of Gas Boreholes 