Study on Evolution Characteristics of Regenerated Roof Structure in Downward Mining of Bifurcated Coal Seam

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Similarity constant</td><td class="align_center">Model</td><td class="align_center">Original rock</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">Similarity ratio of geometric</td><td class="align_center">1</td><td class="align_center">100</td></tr><tr><td class="align_left">Similarity ratio of bulk density</td><td class="align_center">0.608</td><td class="align_center">1</td></tr><tr><td class="align_left">Similarity ratio of elastic modulus</td><td class="align_center">0.00608</td><td class="align_center">1</td></tr><tr><td class="align_left">Similarity ratio of strength</td><td class="align_center">0.00608</td><td class="align_center">1</td></tr><tr><td class="align_left">Similarity ratio of Poisson</td><td class="align_center">1</td><td class="align_center">1</td></tr><tr><td class="align_left">Similarity ratio of time</td><td class="align_center">1</td><td class="align_center">10</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Main constants for similar simulation experiment.</div>

Advances in Materials Science and Engineering

tab3

Table 3

Table 3: Study on Evolution Characteristics of Regenerated Roof Structure in Downward Mining of Bifurcated Coal Seam 