地应力套心解除法测量精度的校验方法研究

介绍了国内外空心包体应变计等套心解除地应力测试技术的基本情况,套心解除测试技术测量精度研究的现状,进行测量精度校验研究的依据和重要意义。提出了一种在岩石洞室进行校验试验的装置,论述了校验试验环境、物理模型组成、试验过程和试验真值获取注意事项。首次给出并重点论述了二维和三维地应力测量精度的定量表述方法,给出了量值综合误差、量值最大误差、角度综合误差和角度最大误差公式,以及多样本的平均误差公式。对上述测量精度误差公式的表述效果进行了讨论,对比了在“一般情况下”和“极端情况下”综合误差和最大误差表述方式的效果,明确了表述公式的适用性。

Research on Calibrating Method for Measuring Accuracy of In-situ

The paper briefly introduces the basic situation of the technology of in-situ stress measuring methods by hollow inclusion cell and other overcoring test techniques at home and abroad. It demonstrates the present situation of measurement accuracy research of the above techniques, and the basis and significance of calibrating the accuracy of measurement. A simple device for calibrating in rock caverns was proposed, and the environment of calibrating test, physical model constitution, test process and the acquisition of the truth-value were discussed. Quantitative representation methods for measuring accuracy of 2D and 3D geo-stress test results were first given and discussed emphatically. The magnitude synthetic error, error of maximum magnitude, angle synthetic error, error of maximum angle formulas, and the mean error formula for multiple samples were presented. The expression effect of the error formula were discussed. The effect of synthetic error and maximum error expressions were compared in “general” and “extreme” cases, and the applicability of the formulas were clarified.