基于波速反演微震监测系统的设计与应用

为了进一步提高微震监测系统的定位精度,提出并设计了一种基于波速反演的微震监测系统。通过频率可调、激振力可控的自激震源及配套的波速反演算法,实现微震定位前波速场的反演与校正,之后用校正后的波速场定位煤岩体破裂产生的微震事件,文中介绍了系统的组成,分站、传感器、自激震源的设计及波速反演的算法。通过煤矿井下定点爆破对比试验结论表明:基于波速反演的微震监测系统的三个方向的定位误差均小于10m,且均优于波兰ARAMIS微震监测系统与加拿大ESG无波速反演功能的传统微震监测系统,为进一步提高微震系统的定位精度提供了新的思路及实现方案。

Design and application of microseismic monitoring system based on wave velocity inversion

In order to further improve the positioning accuracy of the microseismic monitoring system, a microseismic monitoring system based on wave velocity inversion is proposed and designed.? Through the self-excited seismic source with adjustable frequency and controllable excitation force, the inversion and correction of the wave velocity field before microseismic location is realized, and then the corrected wave velocity field is used to locate the microseismic event caused by coal and rock mass rupture. The article briefly introduces the system? Composition, design of substations, sensors, self-excited seismic source and wave velocity inversion algorithm.? The conclusions of the comparative test of fixed-point blasting in underground coal mines show that the three-direction positioning errors of the microseismic monitoring system based on wave speed inversion are all less than 10 m, and are better than Polish ARAMIS and Canadian ESG microseismic monitoring systems. It provides new ideas and implementation schemes for further improving the positioning accuracy of the microseismic system.