Statistical properties of seismic foreshocks and aftershocks associated with longwall mining:Implications from the Epidemic Type Aftershock Sequence model  

作　　者：Xu Li Guangyao Si Bobo Shi Wenzhuo Cao Wu Cai Joung Oh Ismet Canbulat 

机构地区：[1]School of Minerals and Energy Resources Engineering,University of New South Wales,Sydney,NSW,2052,Australia [2]Key Laboratory of Gas and Fire Control for Coal Mines(China University of Mining and Technology),Ministry of Education,Xuzhou,221116,China [3]Department of Earth Sciences,Utrecht University,3584 CS,Utrecht,the Netherlands [4]State Key Laboratory of Coal Resources and Safe Mining,School of Mines,China University of Mining and Technology,Xuzhou,221116,China

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》2024年第12期4878-4894,共17页岩石力学与岩土工程学报（英文）

基　　金：support from Australian Research Council(Grant No.LP200301404);support from the Fundamental Research Funds for the Central Universities(Grant No.2020CXNL02)is also much appreciated.

摘　　要：The control and management of mining-induced seismic hazards have attracted ever-rising attention,especially in underground longwall coal mines,where continuous mining activities dynamically alter the stress states and induce seismic events.In this work,the Epidemic Type Aftershock Sequence(ETAS)model was applied to formulate the aftershock catalogue of mining-induced seismicity and investigate the formation of event triggering associated with longwall mining.The conventional Baiesi and Paczuski method(2004)was used to separate longwall mining-induced seismic events into triggered and nontriggered catalogues.The latter catalogue contains both non-triggering(NT)-isolated events that do not trigger subsequent events and NT-parent events of the former catalogue.Statistical properties of triggered events were analysed spatially and temporally.The temporal triggering sequence follows the Omori-Utsu law,where the temporal decay of aftershocks is influenced by the magnitude of NT-parent events in mining-induced seismicity.The spatial distribution of aftershocks follows an inverted U-shaped relationship with distance to their corresponding NT-parent events.The quantitative forecasting of triggered events was performed based on the nonhomogeneous Poisson distribution,which achieved a good consistency with their NT-parent events.Amongst the non-triggered catalogue,NT-isolated events are concentrated ahead of NT-parent events,potentially acting as foreshocks for the latter.

关 键 词：Event triggering SEISMICITY Longwall mining FORESHOCKS AFTERSHOCKS 

分 类 号：TD32[矿业工程—矿井建设]