The Risk Assessment On The Geological Hazard In Mountain Area In Northern Part Of Tangshan City

The geological calamity comparatively area of development in north mountain area of Tangshan city. Come down many times, such geological calamities as the mud-rock flow , ground collapse , have caused very great influence to local industrial and agricultural production and people's safety of life and property. With Tangshan city high-speed development of economy , launch Tangshan city north geological dangerous appraisal of calamity of mountain area, to predict future geological evolution trend of calamity, one that is to district this reduce natural disasters , take precautions against natural calamities and social economic sustainable development significant .This text has analysed the basic law of the geological calamity of mountain area of the north of Tangshan and characteristic of distribution of space-time, expound the fact district this come down , mud-rock flow , ground collapse background that form , distribution law , influence factor , model come down and karst collapse characteristic in detail. Discover that precipitation is the important factor of bringing out this district geological calamity , draw Tangshan city north mountain area geological critical torrential rain intensity that calamity take place value rainfall in 100mm-150mm, or the rainfall is in 37.5mm hour.flow , unstable slope , ground collapse as factor of appraising, have appraised the geological degree of danger of calamity of this district in ration. Is it say Tangshan city north mountain area most area geological degree of danger of calamity relatively low to come on the whole, but must not ignore the danger of the geological calamity . Calamity it is geological serious degrees of the areas of hazardous area than in have more heavier by 1.2% degrees of the areas of hazardous area , this indicate though geological calamity serious range of area relatively little , calamity centralized to take place the range.Qualitative analysis indicate should appraise result accord with the geological calamity development law, is it use fuzzy mathematics judge law carry on ration or half ration take to geological calamity appraisal feasible synthetically to prove also.