Highway collapse hazard is the combined result of many factors. Based on the formation mechanism of the road collapse hazard and main the factors, they are selected from three aspects of risk assessments master factor: the regional geological structure, slope characteristics, and regional environmental characteristics, also ultimately select the spacing of the joints, slope lithology, slope structure, slope height, slope gradient, rainfall (rainfall in 24 hours to ≥ 25mm of days), the vegetation coverage degree and earthquake strong eight main control factors, above all these factors, they established a road collapse hazard evaluation index system. Based on the fuzzy comprehensive evaluation method, it establishes a road collapse hazard evaluation model. Analytic Hierarchy Process is used to determine the evaluation index system of layers in index weight values. Risk index is based on the evaluation criteria. Finally, an empirical study of two highway projects instances.

With the development of road construction in mountain area of China, the collapse disaster is increased because the high fill and deep cut of the road is more and more. And the great economic losses and casualties are caused by this kind of geological hazard. On basis of the development collapse summarizes the basic rules and types; this paper puts eight fast criterion of discriminant on highway collapse disaster in mountain area according to the character statistics analysis on engineering practice experience and collapse case. According to the development process of the stage on mountain highway collapse disaster, which includes early inoculation stage, middle potential stage and advanced induced stage. On the basis of the rapidly criterion of discriminant on highway collapse disaster in mountain area, this paper refines the five aspects in landform and physiognomy and geological structures, proposes the development process in criterion of discriminant on highway collapse disaster in mountain area. It’s hopeful that the research results can be provided the scientific guidance for the temporal discriminant of highway collapse disaster in mountain area.

As an important exporter of coal resources in China, Yulin has made great contribution to the repaid development of the national economy. But, the geological disaster item caused by large-scale exploitation of coal resources is becoming more and more serious. On the basis of county geological disaster investigation data in Yulin, the research analyzes and summarizes the type, scope, damage degree of the geological disaster in the whole city, especially coal area qualitatively and quantitatively. The article makes clear the spatial distribution of geological disasters in Yulin and it hope that the work can provide scientific guidance to geological disaster prevention in the future. By the research, we get several results as follow: first, There are 905 geological disasters points in Yulin and the mainly the types of all are Collapse, Landslide, Debris Flow, Unstable Slopes, and Ground Subsidence; Second, Collapse and Landslide are the major geological disasters type, and Ground Subsidence is the most serious hazard type in Yulin although its number is small. Third, according to the result above, the city has been divided into different geological disaster-prone areas with MAPGIS, and there are 11 high geological disaster-prone areas, 12 middle, 8 low and 3 undeveloped areas.