Study on the Allowable Exposure Time of Temporary Goaf in the Open Stope and Backfill Mining Method with Large Structure Parameters

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left">Specimens</td><td class="align_center">Instantaneous uniaxial compression strength, <i>R</i> (MPa)</td><td class="align_center">Axial ultimate strain, <i>ε</i> (%)</td><td class="align_center">Remarks</td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">Iron ore</td><td class="align_center">163.59</td><td class="align_center">0.52</td><td class="align_center">Quartz specularite</td></tr><tr><td class="align_left">Filling body</td><td class="align_center">3.34</td><td class="align_center">0.58</td><td class="align_center">Cement-sand ratio of 1 ∶ 6</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Conventional experiment results of the specimens.</div>

Advances in Civil Engineering

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Table 1

Table 1: Study on the Allowable Exposure Time of Temporary Goaf in the Open Stope and Backfill Mining Method with Large Structure Parameters 