| Tongling city is located in central and southern anhui province,is an important non-ferrous metal industrial base in China.Gradually developed due to tongling is a mine development,mining city,mining strong mining activities,together with the unique topography condition,the geological environment fragile,karst collapse,goaf collapse,landslides and other geological disasters occur frequently,to the city's economic construction and people's life and property caused serious economic loss.Therefore,the study of geological hazard prone zoning can provide reliable geological basis for government departments to formulate geological hazard prevention planning and optimize the development and protection pattern of territorial space,which is of great significance for accelerating the formation of green development in local areas.Based on this,this article in tongling city of anhui province 1:50000 geological disaster survey(anhui public welfare geology survey projects,number: AH2013-09)as the backing,on the basis of summing up regional geological environment background conditions,analysis of the geological disasters in tongling city development features and distribution,with the aid of the spatial analysis function of Mapgis software,using the fuzzy comprehensive evaluation based on AHP analytic hierarchy process(AHP)was studied by means of geological hazards in sex partition,mapped the geological hazards susceptibility zoning,and evaluate the liability division.The main conclusions are as follows:(1)The study area is located in the Yangtze sag under the Yangtze continental block,which belongs to the secondary uplift in the depression.The geological structure in this area is complicated,and the present tectonic pattern is basically caused by the strong fold and fault block tectonic change in Mesozoic.Tongling area is one of the important ore concentration areas of the polymetallic mineralization belt in the middle and lower reaches of the Yangtze river.There are 24 hidden dangers of geological hazards,including 1 collapse,13 landslides and 10 ground collapses.(2)The geological disasters in tongling city are distributed in time and space.In terms of time,more geological disasters occur during the rainy season from may to August.In terms of space,the collapse and landslide are mainly distributed in the hilly and mountainous areas in the middle and south,and the ground collapse is mainly distributed in the mountain gullies and valleys around the karst water-filled mines and other relatively negative terrain areas.(3)In constructing the evaluation system and selecting the evaluation factors of the vulnerability to geological disasters,the evaluation system was constructed and the evaluation factors were determined according to the landslide collapse and karst collapse by combining the formation background,spatial and temporal distribution characteristics,inducing factors and human engineering activities.(4)Through spatial analysis function of Mapgis,and puts forward the model of fuzzy comprehensive evaluation based on AHP analytic hierarchy process(AHP),mapped the degree of geological hazards in tongling city zoning maps,evaluation results in tongling city can be divided into high geological disaster in miyun county,miyun county,low and not prone to miyun,accounted for 2.55% of the total,14.25%,20.35%,62.85%.The countermeasures of geological disaster prevention and control are put forward.(5)The GIS technology and the method of fuzzy comprehensive evaluation method is introduced into geological disasters in sex partition,give full play to the spatial analysis function of GIS and the fuzzy comprehensive evaluation method of the advantage of objectivity,can maximum limit will evaluation factors in the process of quantification and to discriminate the subjective and objective factors in the factor weights together effectively,has good practical value and application prospect. |
PDF Full Text Request