Study Of Rockburst Monitoring And Orientation And Magnitude Of Mu Chengjian Colliery

Rock-burst, a dynamic phenomenon of rock-mass unstable breakage suddenly which is induced by mining, is one of the heaviest natural disasters that affects the safety in the mineral production. In recent years, many mines will go into deep mining stage. Mine earthquake disaster will also become more and more serious, so mine earthquake research for reducing disaster loss is indispensable. Although the study of rock-bust has been nearly a hundred years of history at home and abroad, but rock-bust orientation and magnitude calculation by micro-seismic system were seldom studied.This paper is based on the features , causes, conditions ,occurrence mechanisms and classifications of rock-burst, illustrated the rock-burst bringing harms and introduced rock-burst monitoring methods .Those establish the foundation for the further study of rock-burst monitoring and orientation and magnitude.Combining the practical condition of Mu Chengjian mine, the study of its micro-seismic monitoring system's general layout and rock-burst signal recognition's software design is introduced in this paper. The system receiving various signal are researched, and studied rock-burst signal characteristics and interference factors, and given rock-burst signal P waves and S waves automatic identification method. These put on a firm basis for mine earthquake source orientation and magnitude analysis.The method of rock-bust orientation is combined, and the principle of single and more machines'localization method is presented, and the determination method that is suitable for the epicenter in the moment of rock-bust happened. The application results of the micro-seismic monitoring system of Mu Chengjian mining are given.Finally magnitude calculations are centred on and three magnitude calculation scales that are recent earthquake magnitudes, moment magnitude and duration magnitude are given. The duration magnitude is studied in detail. The combination of the rock-burst signals, which are measured by the micro-seismic monitoring system of Mu Chengjian mining, the magnitude formula of duration and vibration half-life is fitted for it, and the magnitude calculation results are analyzed.