急倾斜煤层巷道放顶煤开采合理区段高度研究  

Research on Reasonable District Sublevel Height for Top Coal Caving in Steep Seam

作　　者：刘跃东[1] 张东峰[1] 樊勇[1] 

机构地区：[1]太原理工大学矿业工程学院,山西太原030024

出　　处：《煤炭工程》2014年第7期16-18,21,共4页Coal Engineering

基　　金：国家自然科学基金(51174142)

摘　　要：在弹塑性理论建立顶煤力学模型基础上,利用FLAC3D软件建立大汉沟煤矿5#煤层数值计算模型,并分析不同区段高度下顶煤应力、破坏特征,确定合理区段高度。现场工程实践表明,煤体充分破碎,保证了顶煤回收率及巷道掘进率,区段高度选择合理。With a mechanical model of top coal based on elastic -plastic theory, the numerical calculation model of 5#coal seam in Dahangou mine was established applying FLAC3D software, and the top coal stress and failure characteristicswere analyzed under different district sublevel heights, to determine the reasonable district sublevel height. Fieldengineering practice showed that, the top coal was fully broken, ensuring the top coal recovery rate and roadway drivagerate, verifying the rationality of the district sublevel height.

关 键 词：急倾斜煤层 放顶煤 数值计算 区段高度 

分 类 号：TD823.213[矿业工程—煤矿开采]