Occurrence Mechanism of Roof-Fall Accidents in Large-Section Coal Seam Roadways and Related Support Design for Bayangaole Coal Mine, China

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td class="align_left">Properties</td><td class="align_center">Values</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">Diameter (mm)</td><td class="align_center">21.8</td></tr><tr><td class="align_left">Length (mm)</td><td class="align_center">9000</td></tr><tr><td class="align_left">Elastic modulus (GPa)</td><td class="align_center">237</td></tr><tr><td class="align_left">Tensile strength of steel strand (MPa)</td><td class="align_center">1860</td></tr><tr><td class="align_left">Maximum tensile load (kN)</td><td class="align_center">607</td></tr><tr><td class="align_left">Elongation (%)</td><td class="align_center">7</td></tr><tr><td class="align_left">Pre-tension (kN)</td><td class="align_center">200</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Cable parameters in new support.</div>

Advances in Civil Engineering

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Table 2

Table 2: Occurrence Mechanism of Roof-Fall Accidents in Large-Section Coal Seam Roadways and Related Support Design for Bayangaole Coal Mine, China 