Study on Prediction of Coal-Gas Compound Dynamic Disaster Based on GRA-PCA-BP Model

<table class="table-group" id="tab4"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left" colspan="2">Kaiser-Meyer-Olkin</td><td class="align_center">0.543</td></tr><tr><td class="align_left" rowspan="3">Bartlett sphericity test</td><td class="align_center">Approximate chi-square</td><td class="align_center">91.012</td></tr><tr><td class="align_center">Degree of freedom</td><td class="align_center">28</td></tr><tr><td class="align_center">Significance</td><td class="align_center">0</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Kaiser-Meyer-Olkin and Bartlett tests.</div>

Geofluids

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Table 4

Table 4: Study on Prediction of Coal-Gas Compound Dynamic Disaster Based on GRA-PCA-BP Model 