煤层底板突水的微震监测研究

s one of major monitoring techniques for forecasting the disasters in mine, Microseismic signal contains some special characteristics, such as rich composition of the spectrum and wide frequency band. An important technique in microseismic monitoring is to get the abnormal microseismic signal and the corresponding frequency signal. The crux of using microseismic technique to forecast water-inrush from coal floor is identifying the height and shape (or position) of the rupture zone of the coal floor according to the density and nature of the coal rock. This article discussed principles of microseismic monitoring and positioning and gave five factors that affect the microseismic monitoring technique’s accuracy .They are exploitation facts, geological factors, stations, monitoring factors and algorithm and their mechanism and solutions were analyzed in detail. Through the analysis of water-inrush from coal floor, some practical and specific applications for using microseismic monitoring technique to forecast disasters in mining were put forward