Study of support types for deposits in contact with serpentines: Ait-Ahmane site

Purpose.The purpose of this paper is to study the characteristics of the carbonate serpentines present at the level of the Ait Ahmane site (Bou Azzer Mine, Morocco). Empirical methods are suitable for analyzing their behavior and determining the dimensions of support types. Methods. The rock mass of different structures mentioned in the study is categorized using empirical methods such RMR, Q-system and AFTES classifications. Findings. It has been found that the use of the rock mass quality method (Q-system) is extremely effective in mining rock mass, based on simulated statistical results obtained using empirical approaches. Originality. The equivalent dimensions of the gallery, the stress state in-situ after mining operations, as well as the height of the overburden are all important factors in the gallery stability. Practical implications. The approach creates a strengthened support structure that is optimal. In addition, this research will be useful as a starting point for geotechnical engineers when designing and planning support systems for tunneling under high in-situ stress conditions for very friable rocks.