...资讯 关键词： 地表厚松散层；浅埋煤层；组合关键层；滑落失稳；台阶切落[gap=931]Key words： thick loose bed；shallow seam；combinatorial key strata；instability to sliding；roof step...
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shallow coal seam 浅埋煤层
shallow thick coal seam 浅埋深特厚煤层
shallow buried depth coal seam 浅埋深煤层
approximate shallow buried coal seam 近浅埋煤层
shallow depth seam 浅埋煤层
shallow thinner seam 浅埋较薄煤层
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Study on Strata Mechanical Structure and Support Adaptability of Shallow Seam;
浅埋藏似能保留具白垩状结构的孔隙。
By field observation and simulating test of shallow seam longwall mining, the phenomenon of main roof asymmetry breaking is discovered during the first weighting.
依据典型浅埋煤层工作面的实测和模拟，发现了采场老顶初次破断的非对称现象。
Disaster of water inrush and sand inrush in shallow seam mining area in Western China has become one of the key questions that impact the safe and regular production.
西部浅埋煤层采场的涌水溃沙灾害成为影响安全生产和正常生产的关键问题之一。
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