Trajectory Analysis and Risk Evaluation of Dangerous Rock Mass Instability of an Overhang Slope, Southwest of China

Table 2

Characteristics of dangerous rock spots and economic losses caused by disasters.

Category	Destruction mode	Volume (m^3)	Stable state	Threat object	Economic loss
W1	Falling	654	Under stable	People, houses, highways, engineering facilities	Located above the concentration of residential houses, it seriously threatens the safety of life and property, and the economic loss caused by instability is huge
W2	Toppling	4323	Basically stable	People, houses, highways, engineering facilities	Located above the concentration of residential houses, it seriously threatens the safety of life and property, and the economic loss caused by instability is huge
W3	Falling	280	Unstable	People, houses, highways, engineering facilities	Located above the concentration of residential houses, it seriously threatens the safety of life and property, and the economic loss caused by instability is huge
W4	Falling	2448	Understable	People, houses, highways, engineering facilities	There are fewer houses under the dangerous rock mass, and the economic loss caused by instability is greater
W5	Toppling	3312	Understable	Houses, cultivated field, roads	The dangerous rock mass is far away from the house, and the economic loss caused by instability is not large
W6	Falling	2550	Unstable	Cultivated field, road	The economic loss caused is not big