Automatically positioning microseismic sources in mining by the stereo tomographic method using full wavefi elds*
Miao Hua-Xiang1, Jiang Fu-Xing1, Song Xue-Juan2, Song Jian-Yong2, Yang Shu-Hua1, and Jiao Jun-Ru3
1. University of Science and Technology, Beijing 100083 China.
2. Research Institute of Petroleum Exploration and Development, Beijing 100083 China.
3. Repsol USA, The Woodlands, Texas 77380 USA.
Abstract For microseisimic monitoring it is difficult to determine wave modes and their propagation velocity. In this paper, we propose a new method for automatically inverting in real time the source characteristics of microseismic events in mine engineering without wave mode identification and velocities. Based on the wave equation in a spherical coordinate system, we derive a tomographic imaging equation and formulate a scanning parameter selection criterion by which the microseisimic event maximum energy and corresponding parameters can be determined. By determining the maximum energy positions inside a given risk district, we can indentify microseismic events inside or outside the risk districts. The synthetic and field examples demonstrate that the proposed tomographic imaging method can automatically position microseismic events by only knowing the risk district dimensions and range of velocities without identifying the wavefield modes and accurate velocities. Therefore, the new method utilizes the full wavefi elds to automatically monitor microseismic events.
The research is support jointly by projects of the National Natural Science Fund Project (40674017 and 50774012) and the National Key Basic Research and Development Plan 973 (2010CB226803).
Cite this article:
MIAO Hua-Xiang,JIANG Fu-Xing,SONG Xue-Juan et al. Automatically positioning microseismic sources in mining by the stereo tomographic method using full wavefi elds*[J]. APPLIED GEOPHYSICS, 2012, 9(2): 168-176.
2012, Vol. 9 
