摘要
根据浅埋煤层的特点，提出了覆岩全厚整体台阶切落的判断公式，补充了关键层理论在浅埋煤层应用中的判定准则．分析了不同覆岩岩层关键层的层位，指出地表厚松散层浅埋煤层覆岩中两层坚硬岩层均为关键层，为其长壁工作面来压剧烈的原因提供了理论依据．
Based on the features of the shallow seam, formula for determining the integral breaking of the whole overlying strata is proposed. The supplement and perfection of the criterion for determining the key stratum in shallow seam are given. Position of the key stratum in different overlying strata is analyzed. It is pointed that two hard stratums in overlying strata of shallow seam with thick loose sand bed are both the key seams, and provides the basis of intense roof weighting at long wall faces.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
1999年第4期359-363,共5页
Journal of China Coal Society
基金
煤炭科学基金
关键词
浅埋煤层
厚松散层
关键层
矿压
采场来压
key stratum
shallow seam
thick loose sand bed
working face weighting
