Research on Microseismic Characteristics of Rock,Coal and Gas Outburst in Coal Mines

摘要

Rockburst and coal and gas outburst are the most serious coal (rock) dynamic hazards,using microseismic monitoring system to analyze and compare the similarities and differences between rockburst and coal and gas outburst for providing theoretical basis of monitoring and prediction in case of rockburst and outburst.The results show that the wave and spectrum of rockburst and outburst are similar in many aspects,but the duration,signal band distribution and velocity amplitude are visiblely different in the practical situations of rockburst and outburst Rockburst has the characteristics of short duration time,high velocity amplitude and narrow signal band while coal and gas outburst appears long duration time,three stages of vibration wave include pre-microseism,secondary microseism and main microseism.The peak value time of the vibration wave is almost the same in gas emission.These conclusions are beneficial to research the wave and spectrum characteristics for preventing and predicting rockburst and outburst.