Study on Damage Model and Damage Evolution Characteristics of Backfill with Prefabricated Fracture under Seepage-Stress Coupling

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left">Raw materials</td><td class="align_center">Coal gangue (wt%)</td><td class="align_center">Fly ash (wt%)</td><td class="align_center">Cement (wt%)</td><td class="align_center">Concentration (wt%)</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">Proportion</td><td class="align_center">55</td><td class="align_center">36</td><td class="align_center">9</td><td class="align_center">74</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Mix proportion of backfill specimen.</div>

Advances in Materials Science and Engineering

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Table 2

Table 2: Study on Damage Model and Damage Evolution Characteristics of Backfill with Prefabricated Fracture under Seepage-Stress Coupling 