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本文从地应力测量数据误差处理的角度阐述了地应力计算的最小二乘法 ,对地应力测量精度评定方法进行了改进。采用协方差传播律进行误差计算 ,使精度评定的结果更加准确。利用应力的坐标变换关系 ,推导出主应力与应力分量之间的微分关系 ,使主应力的精度计算更加简便。提出了主应力的偏角误差概念及其计算方法 ,使主应力方向的精度评定更加真实客观。
In this paper, the least squares method of in-situ stress calculation is elaborated from the point of view of the error processing of the geostress measurement data, and the method of evaluating the accuracy of the in-situ stress measurement is improved. The error is calculated by the covariance propagation law to make the result of the accuracy evaluation more accurate. Using the coordinate transformation of stress, the differential relation between the principal stress and the stress component is derived, which makes the calculation of the principal stress more convenient. The concept of deflection angle of main stress and its calculation method are put forward, which makes the accuracy assessment of principal stress direction more true and objective.