AHP-Normal Cloud-Model-Based Method for Risk Assessment of Rockfall Hazards in Laoying Yan.

The rockfall hazard is one of geological hazards in mountainous zone, its occurrence is complex, fuzzy and random. To assess the risk level of rockfall hazards in Laoying Yan accurately, AHP-Normal cloud model is introduced at first; secondly, the index weight coefficients are calculated by using AHP method, then the certainty degree of each index belonging to the corresponding cloud is obtained by using the norm cloud model. The final risk level of rockfall hazards is determined according to the synthetic certainty degree. The conclusions are drawn that accurate rate of risk estimation about rockfall hazards is very high, necessible measures should be taken to prevent possible occurrence of rockfall hazards. [ABSTRACT FROM AUTHOR]