"三软"不稳定厚煤层放顶煤开采瓦斯防治技术
ZHENGMEI KEJI（2005）
Abstract
郑煤集团大平煤矿地质条件复杂,煤层赋存不稳定,放顶煤开采防突是集团公司亟待解决的问题.文章重点介绍了本煤层顺层钻孔预抽瓦斯解决突出问题的方法,并取得了明显效果.
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