face cleat

基本解释

From all the views of points, it is concluded that the methane drainage of wells in vertical direction to face cleat is much better than that of wells in parallel to face cleat.
垂直面割理方向钻孔抽放效果明显优于平行面割理方向钻孔，为探索提高煤层气抽放量找到了一条途径。
This experiment bases on different permeability in different directions of coal seam cleats. To arrange methane drainage direction the directions vertical and parallel to face cleat are adopted.
根据煤层割理渗透率的各向异性，采用垂直面割理和平行面割理两个方向布置钻孔抽放煤层气。