为了消除掘进工作面前方煤体的突出危险性,同时降低回风流中瓦斯浓度,研究提出先抽后掘和边掘边抽的综合技术措施。通过在寺河矿西井区X13012回风巷掘进工作面进行试验,发现在采取综合技术措施后,掘进工作面突出危险性预测超标率由14.70%降至4.17%,回风流瓦斯体积分数由0.7%降至0.4%。可见边掘边抽措施的回风流瓦斯浓度比超前预抽措施的回风流瓦斯浓度降低了43%,工作面突出危险性预测指标超标率降低了71%,抽采及区域防突效果显著。

In order to eliminate the outburst danger of the front seam in the mine seam driving face and to reduce the gas concentration in the air return flow, the p aper studied and provided the comprehensive technical measures with the gas drainage first and then driving operation as well as the driving and gas drainage at the s ame time.The trial test was conducted in the driving face of No.X13012 air retune gateway in the mine west area of Sihe Mine .After the comprehensive technical measu res conducted, the outburst danger prediction over the limits in the gateway driving face was reduced from 14.70% to 4.17% and the gas content of the air return flow W as reduced from 0.7% to 0.4%. The gas content of the air return flow with pilot gas drainage measures was 43% lower than the gas content of the air return flow with the gas drainage first and the driving late measures. The outburst danger prediction over limit in the coal mining face was reduced by 71% with obvious outburst prevention and control effect in the gas drainage and mining area.

河南省重点科技攻关资助项目(092102310037)；国家自然科学基金资助项目(50974056)；