注氮防灭火技术在综采工作面回采期间的应用

Application of Firefighting by Nitrogen Technology on Mining Face During Stope

针对薛虎沟矿2-113综放工作面上隅角出现CO有害气体的问题,结合现场实际情况采取注氮防灭火技术对采空区遗煤自燃进行治理,取得良好效果,经治理后工作面上隅角CO气体浓度从23ppm左右基本降为零,保证了工作面的安全回采。

For existence of harmful CO in corners of 2-113 mining faces in Xuhu Gorge coalmine,the article uses the firefighting by nitrogen technology to address the self-ignition of remained coals in the gob area based on the actual conditions on sites,which leads to remarkable results.The concentration of CO in corns of the mining faces decrease from 23 ppm to around O ppm,guaranteeing the safe stope of mining faces.