Weakness zones

Rock quality has a major influence on, for example, tunnel excavation and rock support methods, both during and after construction. These factors typically govern the feasibility of a project. High quality rock is an ideal material to build in. If a tunnel encounters unknown weakness zones, projects get delayed, costs rise, and the risk increases. 

Weakness zone mapping is a central task during the pre-investigation phase of a project. Some zones can be evident atsurface, though determining their orientation from surface observations alone is challenging. 

Solid, high quality rock is practically transparent in our electromagnetic scans, while major weakness zones give a strong response. The derived 3D models provide strike and dip characteristics of potential zones. This allows us to predict where a planned tunnel may encounter problematic conditions. Surface expressions can be confirmed at depth and extrapolated based on the observed dip angle from the 3D model.