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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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