lower neighbouring coal seam 下邻近层
lower r seam 低层
lower coal seam 下部煤层
lower protective seam mining 下保护层开采
Coalface of Daizhuang Coalmine, the authors believe that the roof in lower seam will form the "block-bulk-beam" structure easy to fall after the mining of top ultra-close seam.
通过对岱庄煤矿4300采区工作面的顶板结构分析，得出了上部极近距离煤层开采后，下部煤层顶板形成极易漏冒的“块体-散体-梁”结构。
Today during the mining process in contiguous seams, there are many factors leading to hidden danger, such as: the top board being tortured during the exploitation of the lower seam;
目前，我国矿山在极近距煤层开采过程中，下部煤层开采时，顶板遭受损伤，工作面及巷道顶板易于出现冒顶、漏顶现象，严重时造成支架埋压；
If you are impatient and want a quick preview of how simple a Seam application is, you can have a look at the hello world example described lower in this article.
如果没有耐心，或者想要快速预览，一个Seam到底有多简单，你可以现看看本文描述的hello world一例。
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