direction of extraction

用法例句

Researches have been conducted in regard to the Stubble Repeating relationship at the Fifth and Sixth Seam at the Ping Dingshan Fifth and Sixth Coal Mine and the coal Pressure appear rule during the face mining,and the reverse direction mining method has been set down.

研究了五六矿戊己组煤层的压茬关系及工作面开采矿压显现规律,制定了反向开采实施方案。