Whatever the straight line part of the stress-strain curve may be, it is always possible to find out the rock stress threshold by the peak value of the S-wave velocity.
试验结果表明：不论应力应变曲线上的直线部分是否明显，都可以用检测横波速度最大值的办法确定岩石的应力门槛值；
The increasing rate of borehole stress and profile strain peak value of cement mortar model are calculated.
还计算了水泥砂浆模型孔壁应力和模型侧面应变在孔壁不同方向的应力、应变峰值增大率。
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