EFFECT OF SENSOR ARRAY GEOMETRY ON MICROSEISMIC SOURCE LOCATION ALGORITHMS
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 time. The 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,is ΔLk/V = ΔWk. So to improve precision of source location, the different algorithms should adopt different strategy for acquiring good sensor array geometry.
BING-RUI CHEN XIA-TING FENG
State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, the Chinese Academy of Sciences, Wuhan 430071, P.R.China
国际会议
The 7th International Symposium on Rockburst and Seismicity in Mines(2009年第七届国际岩爆与微振动性学术研讨会)
大连
英文
1011-1016
2009-08-21（万方平台首次上网日期，不代表论文的发表时间）