Abstract: There are hidden dangers of geological disasters such as collapes and landslide in mining area of Yangquan city because of complex geological environment and strong hunman activity. In this paper, the risk assessment system is constructed in mining area based on the full investigation of geological disasters. Selects eight indexs such as traffic, residential, mining to carry out susceptibility zoning using the method of information value and analytic hierarchy process. On the basic of susceptibility assessment, rainfall factors are super imposed to realize the hazard assessment. Selects population, building and traffic factors to carry out vulnerability model. Based on the outcome of hazard assessment and vulnerability assessment, it establishes risk assessment modes. The research shows that medium-high risk areas are mainly distributed in the streets of Saiyu and Caiwa where there are mining activities and close to the population gathering, and the impact range is large. It is urgent to take measure to monitor and warn.

Key words: geological disasters, susceptibility, hazard, risk assessment