Prévision du risque d’éboulements rocheux dans la région de kherrata (Cas de la RN° : 09)

Abstract

Various types of instability can develop in the slopes of the kherrata gorges (case of RN ° 09) depending on the characteristics of the different geological structures of the nature of the rock matrix and the competence of the rock), using the geomechanically parameters of the discontinuities which quantify the rock mass by methods and empirical classification to systems (RQD, RMR, GSI). We used a stereographic study of discontinuities applied to outcrops using dips software; with a kinematic analysis our show that the majority of ruptures are planes and dihedrons estimatedby1the1Roc Pack1program. The objective of this brief is assess the risk of rockfall (falling boulders), linked to slope phenomena; based on the RHRS model which is isolating 1575 linear meters distributed on the sections of the northern part of an index qualified as very high risk, and 170 linear meters distributed on the sections of the southern part of the index qualifies as medium risk. For this, it has proposed to the construction of protection and reinforcement works in the various sections of the section.