摘要
本文运用97个钻孔柱状图及测井曲线、12个钻孔的岩芯编录、岩矿地化及粒度分析等资料,通过编制层序图和分层图等得知城郊矿区三_4 号煤层顶板系淡水湖泊、分流河道、决口扇、沼泽等三角洲平原诸微环境下形成的沉积物根据 M.M.洛斯对煤层顶板稳定性的划分观点、将上述不同环境内所形成煤层顶板的稳定性划分为四种类型,同时指出各不同稳定性顶板的管理方法。
By use of the data of 97 boring hole pillar charts and their logging curves,core.log of 12 boring holes,minerals and rocks, geochemistry and grain size analyses etc,and through drawing up layer sequence charts and branch layer charts and so on,the author knew the roof rock strata of coal seam Ⅲ_4 is the deposits for med by many delta plain microenvironments,such as freshwater lake,distributary channel,crevasse fan,swamp and so on.In terms of the stability of coal seam roof revealed by the deposits in different sedimentary envitorments what mentioned above,and ae cording to the viewpoint of M.M.Lowes,the coal seam roof can be divided into four types,such as stable,relatively stable. unstable,extremely unstable.And in accordance with different sta bility,corresponding roof controlling method may be put forward.
关键词
煤层
顶板
岩层
稳定性
管理法
Delta plain
The roof stability of coal seam
The method of the roof control
