提高深部开采微震事件定位精度的研究

Research on improving the precision of seismic event location for deep well mining

分析了影响微震事件定位精度的因素,认为在给定速度模型的条件下,定位精度则主要依赖于事件波形到时读数的准确性和震源与拾震器之间的几何形状。结合现场的实际工程条件,进行了拾震器的优化布置,通过对事件波形的降噪处理,提高了P波、S波初至标定的准确性,进而提高了矿山微震事件定位的精度。

To improve the precision of seismic event location, the standard method, and the influencing factors of location precision are discussed. It believes that the location precision depends mainly on accuracy of reading the event wave＇s first arrival and geometric distribution of seismometers on condition of given velocity model. The seismometers are laid optimally based on site actual conditions, and the P-wave and S-wave travel time are calibrated accurately through the measures of noise reduction, and then the precision of seismic event location is improved.