Ground motion characteristics and their cumulative impacts to burst risks in underground coal mines

Abstract Ground motions resulting from seismic waves are one of the main factors to trigger coal burst hazards in underground mines. motion induced dynamic impacts may apply highly stressed coal/rock mass and initiate failure. Although ground analysis has been widely used burst-prone hard rock mines for designing support systems, there only few studies focusing on understanding characteristics their relationship with damage. Therefore, based nine-months monitoring a case study mine, this paper conducted thorough quantifying roadways both far-field near-field zones correlating strong actual The results showed that most were insignificant, which less likely However, same energy levels hypocentral distances, events can produce higher than those Compared motions, had much intensities. by failure or when it is already critically stressed. An index called number high ( NHGM ) was developed link risks roadways. roadway zone experienced long history intensive indicated degree , more expect bursts future. Article highlights Quantify Demonstrate between intensity Develop method forecast potential damage historical motions.