大佛寺煤矿近距离煤层防灭火技术研究
发布时间：2018-09-08 09:36
【摘要】：本文针对大佛寺煤矿40107工作面和上覆采空区40104工作面为研究对象,利用大型煤自然发火实验和程序升温实验,对大佛寺矿煤的自燃特性进行了研究,从实验可以看出:按井下25℃的围岩温度计算,40107工作面煤样实际最短自然发火期为31天;该层煤的临界温度为50～60℃,干裂温度约为90～100℃;给出了该层煤自燃预测预报指标体系;确定了煤自燃的极限参数。采用束管检测的方法,测试了 40107工作面采空区气体分布规律,结合实验得出了该工作面采空区的自燃“三带”分布规律。系统分析了大佛寺矿近距离煤层开采的自燃规律,综合利用隅角堵漏风技术、注氮防灭火技术、注胶防灭火技术及阻化剂等技术,取得了良好的防灭火效果。给出了粉煤灰堵漏风用量的计算方式及注氮流量的计算方式,确定了注氮口位置及间距,给出了针对该工作面的注胶工艺及阻化剂施工工艺。达到了防止采空区遗煤氧化自燃的目的,保证了工作面的安全回采,取得了良好的经济效益。
[Abstract]:In this paper, the spontaneous combustion characteristics of Dafusi coal mine coal are studied by using the spontaneous combustion experiment and programmed heating experiment of large coal, aiming at 40107 face of Dafosi Coal Mine and 40104 face of overlying goaf. It can be seen from the experiment that the actual minimum spontaneous combustion period is 31 days for the coal sample in the coal face, the critical temperature is 50 ~ 60 鈩，
本文编号：2230143
[Abstract]:In this paper, the spontaneous combustion characteristics of Dafusi coal mine coal are studied by using the spontaneous combustion experiment and programmed heating experiment of large coal, aiming at 40107 face of Dafosi Coal Mine and 40104 face of overlying goaf. It can be seen from the experiment that the actual minimum spontaneous combustion period is 31 days for the coal sample in the coal face, the critical temperature is 50 ~ 60 鈩，
本文编号：2230143
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