多煤层开采
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multi seam mining 煤层群开采
multi seam coal mining 多煤层开采
multi-coal seam strip mining 多煤层条带开采
As an application example study,the paper also proposed a new mining design method for steeply-inclined coal multi-seam mining under buildings.
作为应用实例,研究了建筑物下急倾斜煤层群开采设计理论。
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