direction of principal stress meaning in English

主应力方向

( 3 ) based on the analyses results of simple inference method and seismic focal mechanism and on the statistic results of measured geostress data , the direction of principal stress was derived and based on the analyses results of macro geological estimate and on the statistic results of measured geostress data the magnitude of principal stress was derived too . the influence of rapidly down - cutting of yellow river on geostress field of studied zone was discussed . then the evolution of geostress field accompanying with the down cutting of yellow river and was simulated with fem and the spatial distribution features of geostress were discussed
根据简易推断法、地震震源机制分析法以及地应力实测资料统计分析结果，综合确定了工程区的主压应力方向；运用地质宏观判断法并结合地应力实测资料的统计分析结果对地应力的量级进行了综合评价，并进一步讨论了黄河快速下切对研究区地应力场的影响；运用有限元法模拟了研究区地应力场的形成过程，并探讨了地应力的空间分布规律。