With Vertical Distance

The lag distance of abutment pressure behind working face increases, but the convergence coefficient of vertical stress doesn't change obviously with the increase of mining height.

分层开采与综放开采工作面滞后支承压力变化规律是，随着采高的增大，工作面滞后支承力的距离加大，垂直应力集中系数差别不大。

It is found that the maximum concentration often occurs near source through intensive vertical diffusion, and the values of concentration decrease with the distance downwind rather rapidly.

发现由于垂直扩散较强，最大浓度常于近源处发生，且向下风方浓度衰减较快。

Its characteristics include that the counter force is proportional with the horizontal distance of a vertical line where BHA is offset from an open hole.

新的纠斜控制方法以减小测量点与开孔点垂线间的水平距离为目标，可以提高垂钻轨迹的垂直精度。