Monitoring of fracture water at the construction site of an underground research laboratory in the Krasnoyarsk krai

The article substantiates the need for deep monitoring of groundwater at the construction site of an underground research laboratory (URL), as an underground facility not related to mining. The systems of borehole investigations on similar sites are considered, and also the scheme of construction of the installation for borehole injection and monitoring of its development is described. With minimal re-equipment, it allows to carry out experimental filtration work using the injection method to search for water-conducting fracture in the massif or carry out long-term pumping with low flow rates by membrane pumps for groundwater sampling. Implementation of these schemes has made it possible to study a deep borehole in the Yeniseiskiy site and identify permeable fractured reservoirs in it. At the same time, an assessment of the studied zones made it possible to classify the rocks as weakly permeable and waterproof.