1) features of coal seam with middle band
夹矸层特征
2) coalseam dirt band
煤层夹矸
3) tonstein coal seam
夹矸煤层
1.
Experiment on mining by the air-space blasting in tonstein coal seam;
夹矸煤层采用空气柱间隔装药结构开采的试验研究
4) Coal seam with dirt band
含夹矸层煤层
5) The top coal with rock seam
含夹矸层顶煤
6) broken feature
含夹矸厚煤层
1.
Firstly,the paper analyzes broken feature over top coal with thick coal seam with a stratum of gangue,it is to say, which analyzes strength feature and deformed feature of top coal.
本文以涡北煤矿8102工作面的地质条件和生产技术条件为基础,综合运用理论分析、数值模拟和现场实测等方法,对软煤、厚硬顶板、含夹矸厚煤层综放开采围岩运移规律、夹矸层对顶煤冒放的影响及含夹矸层顶煤端面漏冒机理进行了系统研究。
补充资料：丹矸
1.朱砂。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条