Evaluation Of Crustal Stability In The Anhui Section Of The Tanlu Fault Zone

Tanlu fault zone is a giant fault zone and the largest seismic activity zone in east China.Along the Anhui section of the Tanlu fault zone,the city is densely distributed and has a large population.With the continuous development of urban engineering construction and economy,The crustal stability in the Anhui section of the Tanlu fault zone has important theoretical and practical value.On the basis of field investigation and extensive collection of information,this paper systematically studies the distribution and activity of deep faults in the study area through field geological survey,and determines that 17 of the crustal faults are mainly composed of regional crustal stability.Significantly affected deep faults.The seismic activity,geological hazards and geotechnical geological properties of the area were analyzed.six factors including active fault,ground motion peak acceleration,seismicity,geotechnical geological characteristics,collapse and slip-prone susceptibility and goaf collapse sensitivity are selected as the evaluation factors of regional crustal stability.Each evaluation factor is classified and assigned,based on the ArcGIS platform,the multi-factor spatial weighted superposition method is used to establish a crustal stability evaluation model for the Anhui section of Tanlu fault zone.Finally,the regional stability map of the crustal stability in the Anhui section of the Tanlu fault zone is drawn.The evaluation results show that the crust of the study area is stable and relatively stable,accounting for 87.3% of the total area;while the unstable area accounts for 7.9%,the unstable area only accounts for 4.8%.This indicates that although the fault structure of the Anhui section of the Tanlu fault zone is densely distributed,the activity of the fault is generally not strong,only in the near-East-direction Feizhong fault,the Xiaotian-Mozitan fault fault and the Tanlu fault.The stability of the TanLu fault zone is relatively poor;although the earthquake is frequent,the magnitude is not high,so the overall stability of the area is good.Only in some areas such as Dingyuan,Mingguang,and Sixian,it is necessary to focus on improving the building.The seismic performance of the structure.The results of the crustal stability evaluation in this area can provide scientific support and guarantee for urban planning and construction development in this region.