摘要
为研究不同含水状态对坚硬煤层冲击倾向性指标的影响规律,以忻州窑煤矿8935工作面为工程背景,开展不同含水状态下煤体冲击倾向性实验,分析动态破坏时间、弹性能指数、冲击能指数及冲击倾向性随含水状态变化的特征。结果表明:坚硬煤层冲击倾向性随含水率增加而降低,同时动态破坏时间随含水率增加先增大后减小,弹性能指数、冲击能指数均随含水量增加而呈现降低趋势,冲击能指数受含水率影响较大。
In order to study the effect of different water contents on bursting potential index of hard coal seam,the article took the work face of Xinzhouyao coal mine 8935 as the engineering background,carried out the bursting potential experiments of coal under different water contents and analyzed the dynamic failure duration,elastic energy index,burst energy index and bursting potential characteristics with the change of water contents. The results show that bursting potential of hard coal seam decreases with the increase of water content,meanwhile dynamic failure duration first increases with the increase of water content and then decreases. The elastic energy index and burst energy index show decreasing trend with the increase of water content. The burst energy index is more influenced by water contents.
出处
《水资源与水工程学报》
2014年第1期100-102,共3页
Journal of Water Resources and Water Engineering
基金
教育部博士点基金(20122121120004)
国家重点基础研究发展计划(973)项目(2011CB201206)
关键词
含水率
动态破坏时间
弹性能指数
冲击能指数
坚硬煤层
water content
dynamic failure duration
elastic energy index
burst energy index
hard coal seam
