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煤层是煤矿勘探和开采的对象,煤层的特征往往由形状、产状、煤厚等参数来描述,在煤田普查和勘探时期,煤层的层数、
The coal seam is the object of exploration and exploitation of coal mines. The characteristics of the coal seam are usually described by such parameters as shape, occurrence and coal thickness. During the coalfield census and exploration, the number of coal layers,