Research on Dynamic Evaluation Model of Slope Risk Based on Improved VW-UM

Table 3

Quantitative index system for risk assessment of slope in Yuebao Open-pit Mine and the corresponding evaluation criteria.

Classification of influence degree	Influencing factor
	Internal friction angle (X4)	Cohesion (X5)	Monthly maximum rainfall (X8)	Slope gradient (X9)	Slope height (X10)
Grade I; (C1)	<18	<0.05	>300	60~80	>100
Grade II; (C2)	27~18	0.09~0.05	150~300	40~60	60~100
Grade III; (C3)	35~27	0.13~0.09	80~150	20~40	20~60
Grade IV; (C4)	>35	>0.13	<80	0~20	<20