in situ stress meaning in English

现场应力；原位应力
原岩应力

Optimization study on cross section of deep mine tunnel under high in situ stress
深部高地应力巷道断面优化研究
Results and their analysis of in situ stress measurement in sanshandao gold mine
三山岛金矿地应力场测量及结果分析
Standard test method for in situ stress and modulus of deformation using the flatjack method
使用扁千斤顶法现场测定变形的应力和模数的标准试验方法