Fig. 3

Longitudinal section of the microtunnel showing the instrumentation cross sections (Gaus et al. 2014). Sections SA, SB, SD denote rock instrumentation, sections N1–N3 and G1–G3 denote buffer instrumentation
Longitudinal section of the microtunnel showing the instrumentation cross sections (Gaus et al. 2014). Sections SA, SB, SD denote rock instrumentation, sections N1–N3 and G1–G3 denote buffer instrumentation