Experimental Study on Strengthening and Sealing Materials and Their Application in Coal Mines

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left">Factor</td><td class="align_center">Unit</td><td class="align_center" colspan="3">Level</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">Aluminium powder content</td><td class="align_center">%</td><td class="align_center">0.43</td><td class="align_center">0.52</td><td class="align_center">0.68</td></tr><tr><td class="align_left">Gypsum content</td><td class="align_center">%</td><td class="align_center">1</td><td class="align_center">2</td><td class="align_center">3</td></tr><tr><td class="align_left">Ratio of water to material</td><td class="align_left"> </td><td class="align_center">0.5</td><td class="align_center">0.6</td><td class="align_center">1</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Factors and their levels used in the Box–Behnken design.</div>

Advances in Materials Science and Engineering

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Table 1

Table 1: Experimental Study on Strengthening and Sealing Materials and Their Application in Coal Mines 