(一)现用的计算方法 目前,常用的几种原岩应力测量方法是:孔底应力解除法、孔壁应变法、孔径变形法及孔径变形负荷法。这些方法在最后计算岩体应力分量时,都是根据实测的应变值、孔径变形值、折算(记录)应力、弹性常数及波桑比解一个线性方程组。不失一般性,假定方程组为: (I) Current calculation methods Several commonly used methods for measuring stress in original rock are: bottom hole stress relief method, hole wall strain method, hole diameter deformation method, and hole diameter deformation load method. In the final calculation of rock mass stress components, these methods are based on measured strain values, pore diameter deformation values, converted (recorded) stresses, elastic constants, and a system of wave equations for wavefronts. Without loss of generality, it is assumed that the system of equations is: