JiangTianqi, PeiShuojin. Micro-seismic event location based on Newton iteration method and grid-search method[J]. Journal of Mining Science and Technology, 2019, 4(6): 480-488.
Citation:
JiangTianqi, PeiShuojin. Micro-seismic event location based on Newton iteration method and grid-search method[J]. Journal of Mining Science and Technology, 2019, 4(6): 480-488.
JiangTianqi, PeiShuojin. Micro-seismic event location based on Newton iteration method and grid-search method[J]. Journal of Mining Science and Technology, 2019, 4(6): 480-488.
Citation:
JiangTianqi, PeiShuojin. Micro-seismic event location based on Newton iteration method and grid-search method[J]. Journal of Mining Science and Technology, 2019, 4(6): 480-488.
Inordertomaketheoptimizationalgorithmconvergentgloballyandquicklywhenlocatingmicro-seismicevents,consideringthegoodperformanceofgrid-searchingmethodonglobalconvergence andadvantagesofNewtoniterationmethodforcalculationspeedandaccuracy,alocationmethodbased ongrid-searchingmethodandNewtoniterationmethodisproposed.Firstanapproximatelocationresult isobtainedbygrid-seachingmethodwithsparsediscretizedgridsinthemonitoringareaandtheresultis theinitialiterationvalueforNewtoniterationmethod;secondNewtonmethodisappliedfortheaccurate locationresult.The influences of anisotropy of the velocity model and velocity measure error are analyzedinsimulationexperimentsandtheproposedmethodiscomparedwithNewtoniterationmethod, grid-searchingmethodandsimulatedannealingmethodaboutlocationaccuracy,efficiencyandstability.Thelocationresultsshowthattheproposedmethodcanlocatemicroseismiceventsaccurately,efficientlyandstably.Theproposedmethodisalsotestedwithfielddata. Thelocationresultislessthan4 m. Sothemethodispracticalformicroseismiceventlocations.
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