Based on briefly describing the general situation of Sinian depositions, the conditions of source bed, reservoir and capping rock of Dengying Formation.
本文在简述震旦系沉积概况的基础上，对川西南震旦系灯影组的生、储、盖层条件进行了分析。
The research result shows that longwall mining method with hydraulic pressure frame supporting capping rock is the optimal mining proposal for the gently inclined and extremely thin iron mine.
研究证明，液压护顶长壁法是开采缓倾斜极薄类铁矿床最优的采矿方法。
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