工作面末采回撤时期防灭火及快速回撤技术
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摘要
根据碱沟煤矿煤层赋存条件、工作面开采条件及周围采空区分布状态,着重分析了+495m B_(3-6)回撤工作面出现高浓度CO灾害气体及H_2S气体等异常现象的原因。+495 m B_(1-2)回撤工作面汲取了以上教训,采取了一系列的防灭火及快速回撤技术手段,其中主要包括末采阶段强化放煤、吊装硐室外移、双巷回撤和主动的防灭火技术措施,极大地提高回撤的速度及安全系数,并将回撤周期缩短至18 d,确保了+495 m B_(1-2)工作面安全、顺利回撤。
According to the occurrence conditions of coal seam in Jiangou Coal Mine, the mining conditions of the working face and the distribution of the surrounding goaf, the reasons for the abnormal phenomena such as high concentration CO disaster gas and H_2S gas in the +495 m B_(3-6) retracement working face are analyzed. The +495 m B_(1-2) retracement working face has learned the above lessons and adopted a series of fire prevention and rapid withdrawal techniques, including: intensively mining of top coal in the final mining stage, hoisting chamber and moving outside, double lane retreating and initiative fire-fighting measures to greatly improve the speed and safety factor of the retracement and shorten the retracement period to 18 days, which ensures the safe and smooth withdrawal of +495 m B_(1-2) working face.
According to the occurrence conditions of coal seam in Jiangou Coal Mine, the mining conditions of the working face and the distribution of the surrounding goaf, the reasons for the abnormal phenomena such as high concentration CO disaster gas and H_2S gas in the +495 m B_(3-6) retracement working face are analyzed. The +495 m B_(1-2) retracement working face has learned the above lessons and adopted a series of fire prevention and rapid withdrawal techniques, including: intensively mining of top coal in the final mining stage, hoisting chamber and moving outside, double lane retreating and initiative fire-fighting measures to greatly improve the speed and safety factor of the retracement and shorten the retracement period to 18 days, which ensures the safe and smooth withdrawal of +495 m B_(1-2) working face.
引文
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[3]冯泽伟,马小宁.工作面快速回撤技术优化研究[J].内蒙古煤炭经济,2017(23):23-24.
[4]杨波.缓倾斜易自燃大断面综放工作面快速回撤技术[J].煤矿安全,2017,48(11):100-102.
[5]杨元勋,张凌.极近距离易自燃煤层群工作面回撤期间防灭火技术[J].煤矿安全,2017,48(6):72-75.
[6]张劲松,武腾飞.综采工作面回撤期间防灭火技术[J].煤矿安全,2016,47(12):68-71.
[7]张晓桐.综放工作面回撤期间防灭火综合治理[J].煤,2016,25(9):40-41.
[8]刘成武.综采工作面安全快速回撤技术研究[J].煤矿现代化,2013(1):17-19.
[9]刘绍文.综采快速回撤技术研究[J].煤炭技术,2009,28(7):99-100.
[10]马超,赵云锋.孤岛综放工作面终采及回撤期间防灭火技术[J].煤炭科学技术,2008(11):39-41.