Design Of Seismic Mobile Observation System In Xiluodu Reservoir Area And Research On Data Analysis Processing

The reservoir dam plays an important role in environmental protection,agricultural irrigation,aquaculture,shipping,water supply,power generation,flood control(especially in the prevention of flood)and so on in China.Therefore,The safty of reservoir dam is very important under earthquake.It is the research focus that how to reasonably build the seismic mobile observation system,collect and process the seismic data so as to give earthquake early warning of reservoir dam.Firstly,the related research on seimic mobile observation is summarized,including a set of basis and purpose,monitoring scope,basic task,condition,location,and technical measures on site erection in this paper.And then,seismic mobile observation system in Xiluodu Hydropower Station and station construction,platform background noise level,instrument layout and calibration,technical parameters selection,and data retrieve is studied.Finally,the JOPENS-MSDP(3D)combined with seismic mobile stations and fixed mobile station records was used to determine the earthquake occurrence time and three factors of earthquake(magnitude,epicenter and focal depth),and earthquake parameters are studied contrastively with and without the participation of seismic mobile stations.The main research results are as follows:(1)The seismic mobile station is an important part of the monitoring system for timely and effective monitoring of seismic encryption,and can make up the shortcomings of seismic data recording and improve the rapid response capability of earthquake disaster;(2)Based on the background of seismic activity of Xiluodu reservoir and the geological structure and self-emphasis of Xiluodu reservoir,the paper analyzed the characteristics of the seismic activity monitoring and the monitoring of the mobile station,an d then studied the seismic activity of the Xiluodu reservoir;(3)the focal depth mainly concentrates in 1-3km by using seismic mobile station data.However,the focal depth distribution analyzed from fixed station data is about 2-6km,the combined application of mobile station and fixed station improves the precision of earthquake time,magnitude,epicenter and focal depth;(4)The results show that three flow stations arranged in the first area of Xiluodu reservoir are reasonable in design.The study for the reservoir-induced earthquake,especially the reservoir-induced earthquake mechanism and seismic activity characteristics in the active area and high-intensity area,is reference significant.