音频大地电磁法(AMT)在永胜县程海—宾川断裂跨断层监测选址中的应用

Application of audio magnetotelluric method(AMT)in crossing fault of Chenghai-Binchuan fault in Yongsheng County,China

牛顿力NPR锚索监测钻孔应设置在尽量靠近深大断裂的最佳位置,使用音频大地电磁法(AMT)对目标断裂进行探测,准确地探测出深大断裂在地下的分布情况,为钻孔选址提供准确可靠的地球物理参数.文章首先阐述了音频大地电磁法(AMT)的基本原理,介绍了Aether大地电磁系统,然后结合工程实例,探讨了方法在永胜县程海—宾川断裂中的实际应用效果.实践表明,音频大地电磁法(AMT)具有数据采集时间短、探测深度大、能够有效地反映断裂在深部的视倾向、视倾角等优点.

The Newtonian force NPR anchor cable monitoring borehole should be set at the optimal location as close as possible to the deep and large faults.The audio magnetotelluric method(AMT)should be used to detect the target fault,accurately detecting the distribution of the deep and large faults underground for providing accurate and reliable geophysical parameters for drilling site selection.The article first elaborates on the basic principle of the audio magnetotelluric method.The Aethermagnetotelluric system was introduced,and then combined with engineering examples,the practical application effect of the method in the Chenghai Binchuan fault in Yongsheng County was discussed.Practice has shown that AMT has the advantages of short data acquisition time,large detection depth,and can effectively reflect the apparent inclination and dip angle of the fault in the deep.