Development of an automatic algorithm for determination of micro-seismic energy and duration

摘要

Accurate calculation of the energy is a technical difficulty that various microseismic monitoring systems are facing. In this article, we applied the fiber optics microseismic monitoring system to mine rock burst monitoring for the first time. We suggest to calculate microseismic energy via the duration of vibration. Precise picking of P wave first arrival and end point is essential to microseismic energy calculation. According to the huge energy difference before and after the arrival of the seismic wave, we use the sliding time-window energy ratio method to pick the first arrival and end point, and put forward the quantitative relationship between the sliding time-window width and the sampling frequency as well as the signal dominant frequency for the first time. The results of P wave automatically picking are more precision than those manually picked.