A Q-based empirical method to stability assessment of mountain rock slopes in multiple faults zone: A case for North of Tabriz.

The present article provides an empirical relationship for rock slope stability assessment based on Q classification. The relationship is used as a correction procedure for classic Q for mountain regions with multiple fractures related to several faults. The relationship is derived from 25 distinct jointed slopes near the North Tabriz Fault (NTF). The NTF triggered numerous micro-faults and fractures in rocky landscapes, resulting in sliding on a variety of scales. The present empirical method is introduced based on a field survey and a stability analysis of the studied slopes based on Q principles. The results indicate that the classic formulation of Q can be modified to β = 62.6 log10 (Q) + 36 for mountain regions with multiple fault zones. • This empirical method can be useful for fast stability assessment on jointed rock slopes. • This relationship can use as a modification for the original formula in multiple faults zones.