Experimental Study on the Ratio of Similar Materials in Weak Surrounding Rock Based on Orthogonal Design

<table class="fixed-width table-group" id="tab3"><tr><td><table class="table"><colgroup><col style="width:3.39em"/><col style="width:6.99em"/><col style="width:4.35em"/><col style="width:6.99em"/><col style="width:4.35em"/></colgroup><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left" rowspan="2">Level</td><td class="align_center" colspan="2">Cohesion</td><td class="align_center" colspan="2">Internal friction angle</td></tr><tr class="thead"><td class="align_center">Standard sand</td><td class="align_center">Silt clay</td><td class="align_center">Standard sand</td><td class="align_center">Silt clay</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">1</td><td class="align_center">0.82</td><td class="align_center">0.77</td><td class="align_center">22.23</td><td class="align_center">24.5</td></tr><tr><td class="align_left">2</td><td class="align_center">0.8</td><td class="align_center">0.93</td><td class="align_center">23.3</td><td class="align_center">24.1</td></tr><tr><td class="align_left">3</td><td class="align_center">0.79</td><td class="align_center">1</td><td class="align_center">24.6</td><td class="align_center">23.8</td></tr><tr><td class="align_left">4</td><td class="align_center">0.76</td><td class="align_center">1.16</td><td class="align_center">25.7</td><td class="align_center">23.4</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Results of extreme difference calculation and analysis.</div>

Journal of Engineering

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Table 3

Table 3: Experimental Study on the Ratio of Similar Materials in Weak Surrounding Rock Based on Orthogonal Design 