Distribution Law and Prediction Model of Dust Concentration under Airflow Adjustment in Fully Mechanized Heading Face

<table class="fixed-width table-group" id="tab17"><tr><td><table class="table"><colgroup><col style="width:9.33em"/><col style="width:11.48em"/><col style="width:15.94em"/></colgroup><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left" rowspan="2">Predictive object</td><td class="align_center">Dust concentration at the </td><td class="align_center">Dust concentration at the pedestrian </td></tr><tr class="thead"><td class="align_center">driver location (mg/m<sup>3</sup>)</td><td class="align_center">breathing-height (mg/m<sup>3</sup>)</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">Before adjustment</td><td class="align_center">517</td><td class="align_center">447</td></tr><tr><td class="align_left">After adjustment</td><td class="align_center">325.36</td><td class="align_center">304.32</td></tr><tr><td class="align_left">Reduced percentage</td><td class="align_center">37</td><td class="align_center">32</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Analysis of adjustment effect at the nearest distance of 5m.</div>

Mathematical Problems in Engineering

tab17

Table 17

Table 17: Distribution Law and Prediction Model of Dust Concentration under Airflow Adjustment in Fully Mechanized Heading Face 