shallow coal meaning in Chinese

浅煤

Working resistance and safety margin of long - wall support in shallow coal bed
浅埋煤层长壁开采支架阻力及安全界限
Testing study on 3d similar material simulation for shallow coal seam mining
浅埋煤层开采三维相似材料模拟实验研究
Numerical simulation of the air leakage in the bedding plane of gob in shallow coal seam
浅煤层采空区层面漏风的数值模拟分析
Numerical analysis on movement rule of overlying strata of shallow coal seam covered with thin bedrock
浅埋煤层开采覆岩移动规律数值分析
Analyzing falling crack failure of overburden strata of shallow coal seam and its control method
浅埋煤层覆岩切落裂缝破坏及控制方法分析

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