Prevention and Control Technology for Harmful Toxic Gas Intrusion in High-Fire-Hazard-Risk Areas of Close-Distance Coal Seams

<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">Density (kg/m<sup>3</sup>)</td><td class="align_center">Compressive strength (MPa)</td><td class="align_center">Air tightness (m<sup>3</sup>/(m<sup>2</sup>/min))</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">250</td><td class="align_center">1.8</td><td class="align_center">0.85 × 10<sup>−6</sup></td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Test results of properties of inorganic cured materials.</div>

Journal of Chemistry

tab3

Table 3

Table 3: Prevention and Control Technology for Harmful Toxic Gas Intrusion in High-Fire-Hazard-Risk Areas of Close-Distance Coal Seams 