In the practice of constructing underground hydraulic structures, conditions often arise that require careful attention to gas forecasting. Such forecasting can be based on an analysis of the geological and tectonic structure of the area, a study of the mineral composition, degree of lithogenesis, rock chemistry, temperature and gas composition, groundwater sources, etc. The problem of ensuring the reliability of underground structures is complicated by the high seismicity of the areas in question, significant natural stresses, often comparable to the strength of the rock, and the presence of faults along tunnel routes.

Keywords: water inflow, geology, landslides, tunnels, orogenic regions, tectonic processes, relief, exogenous processes, clay, loam, limestone