the maximum principal stress

基本解釋

In region(1), the maximum principal stress is tensile stress;
在拱底應(yīng)力區(qū)，最大主應(yīng)力為拉應(yīng)力；
While direction of previous main faults that intersect the maximum principal stress by minor angle also probably becomes the major migration direction of oil and gas.
與最大主應(yīng)力小角度相交的先期主要斷裂的方向也可能成為油氣運(yùn)移的主要方向。
When the tunnel axis is consistent with the fault strike and the vertical stress is the maximum principal stress, it is likely to lead to the tunnel rock cracking, collapse and other damages.
此外，巷道軸線與斷層走向一致并且地應(yīng)力以鉛直應(yīng)力為最大主應(yīng)力時(shí)，最容易引起斷層滑移活化導(dǎo)致巷道圍巖產(chǎn)生開裂、塌方等破壞。
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最大主應(yīng)力
The Maximum principal stress equal to Vertical stress approximately, which makes an angle of about 11.9°to 14.25°with the shaft axis.
最大主應(yīng)力約等于豎向應(yīng)力，與井筒軸向夾角為11．9°～14．25°。