EFFECT OF SENSOR ARRAY GEOMETRY ON MICROSEISMIC SOURCE LOCATION ALGORITHMS
会议名称：《The 7th International Symposium on Rockburst and Seismicity in Mines(RaSiM7)》
会议日期：2009年
学科分类：081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学]
基 金：supports from the Hi-Tech Research and Development Program of China(863Program) under Grant No.2006AA06Zl17 National Natural Science Foundation of China under Grant No.50539090 the Knowledge Innovation Program of the Chinese Academy of Sciences under Grant No.0711031Q01
摘 要：The algorithms of source location can be classified into four classes in terms of required solved parameters theoretically:firstly,velocity structure is given,and locations of microseismic sources and time of microseismic occurrence are identified on basis of arrival time recorded;secondly,given locations of microseismic sources, velocity structure and time of microseismic occurrence are solved in terms of arrival time;thirdly,velocity structure and locations of microseismic sources are inversed based on the time difference of sensor-pairs;lastly,velocity structure,locations of microseismic sources and time of microseismic occurrence are recognized together based on arrival *** effect of sensor array geometry on the four algorithms of source location is studied systematacially. Studies show that velocity of convergence is faster and precision of convergence is higher in ranges of sensor array than out of sensor array for the first algorithm;if only sensors can receive microseismic signals,the solution is unique and sensor locations are unlimited theoretically for the second conditions;the same association characteristics are found for the last two algorithms by theoretical analysis and the necessary condition that the association occurs, isΔL/V=Δ*** to improve precision of source location,the different algorithms should adopt different strategy for acquiring good sensor array geometry.