摘要
基于钻孔岩心资料,分析了芦岭煤矿8煤层顶板的岩性类型和顶板的结构类型,统计了顶板30m以内砂岩的厚度和8煤直接顶厚度。按照硬质岩石百分含量(K)的大小将顶板岩体岩性分为硬质岩体、中硬岩体和软质岩体三类;按照直接顶厚度/采高的比值(Km)将顶板的工程地质类型分为无周期来压顶板、周期来压顶板和周期来压强烈顶板三种类型,得出了8煤顶板类型分区。研究结果为该矿工作面布置方法、顶板支护方式的选择提供了依据,为顶板事故的预防提供了参考资料。
Based on borehole core data,analyzed the Luling coalmine No.8 coal roof lithologic and structural types,and estimated sandstone thickness above roof within 30m and immediate roof thickness.According to hard rock percentage（K） divided the roof rock into three kinds of hard,medium and soft rock masses;according to immediate roof thickness/shear height ratio（Km） divided the roof into three kinds of engineering geological type： no periodic weighting roof,periodic weighting roof and strong periodic weighting roof,thus the No.8 coal roof types have zoned.The studied result has provided bases for working face layout method,roof supporting pattern selection,and reference for roof accident prevention.
出处
《中国煤炭地质》
2010年第9期35-37,82,共4页
Coal Geology of China
关键词
芦岭煤矿
顶板特征
顶板结构
顶板岩性
顶板类型
Luling coalmine
roof characteristics
roof structure
roof lithology
roof type
