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Roof Control of Sub - level Caving Mining in"Three- weak Elements" Unstable Thick Seam
Author(s): 
Pages: 35-36
Year: Issue:  2
Journal: COAL

Keyword:  综采放顶煤顶板控制“三软”煤层;
Abstract: 综放开采顶板管理问题的解决,使郑煤集团公司采煤工艺取得突破,为豫西煤田的开发走出一条高产高效的路子。
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