The study would help to verify mixture proportions, the use of admixtures, rebound adjustments, as well as guarantee the required fibers dosage.After all the geotechnical studies are finished, it could be confirmed that the energy absorption required for the diversion tunnels range from 700 to 500 joules, measured on square panels (EN 14488-5). The use of square panel is preferable, because it represents better the way shotcrete will work on site conditions, but if round panels are used, and the contractor does not determine a correlation,