电感应力灵敏度在实测中的研究

STUDY ON SENSITIVITY OF THE INDUCTANCE STRESS IN PRACTICAL OBSERVATION

应力场的观测是预报地震较直接的途径之一,本实验利用异孔深井抽水的加(减)载作应力观测的人工力源,在大量实测数据基础上进行力学分析,得出电感应力观测在满足规范要求时能测到地应力场的变化,但室内标定的应力灵敏度不等于实测灵敏度。用室内灵敏度计算应力值必有明显误差。本结果对电惑应力观测科学具有重要的实际意义。

Observing stress field is one of the direct ways predicting earthquake. This experiment has utilized the load increasing (or decreasing) of deep—well pumping in different hole as the artificial force source for stress observing, and has made the mechanical analysis based on a vast amount of practically observed datas. It indicates that the observation inductance stress is able to meassure the guround stress field changes according to the request of observation regulations, but the calibrated stress sensitivity in doors is not equal to the practical observed sensitivity. Using the indoor sensitivity to caculate the stress value surely has obvious error. This result is of significance to the science of inductance stress observation.