Abstract. Slope failure, which causes destructive damage and
fatalities, is extremely common in mountainous areas. Therefore, the
stability and potential failure of slopes must be analysed accurately. For
most fractured rock slopes, the complexity and random distribution of
structural fractures make the aforementioned analyses considerably
challenging for engineers and geologists worldwide. This study aims to solve
this problem by proposing a comprehensive approach that combines the
discrete fracture network (DFN) modelling technique, the synthetic rock mass
(SRM) approach, and statistical analysis. Specifically, a real fractured
rock slope in Laohuding Quarry in Jixian County, China, is studied to show this
comprehensive approach. DFN simulation is performed to generate
non-persistent fractures in the cross section of the slope. Subsequently, the
SRM approach is applied to simulate the slope model using 2D particle flow
code software (PFC2D). A stability analysis is carried out based on the
improved gravity increase method, emphasizing the effect of stress
concentration throughout the formation of the critical slip surface. The
collapse, rotation, and fragmentation of blocks and the accumulation
distances are evaluated in the potential failure process of the rock slope.
A total of 100 slope models generated with different DFN models are used to repeat the
aforementioned analyses as a result of a high degree of variability in DFN
simulation. The critical slip surface, factor of safety, and accumulation
distance are selected by statistical analysis for safety assurance in slope
analysis and support.
Stability evaluation and potential failure process of rock slopes characterized by non-persistent fractures