The studies of the processes of changing the physical and mechanical properties of clayey rocks, started by V.D. Lomtadze back in 1955-1956, gave a powerful impetus to the development of the problem. Numerous works by V.D. Lomtadze, his students and followers confirmed the existence of several lithification stages, and the use of system analysis made it possible to substantiate their quantitative boundaries.
The most important feature of mining of mineral deposits is the exceptional size of the area of influence of mining systems. The length of mine workings and the depth interval of their location can be measured in many hundreds of meters and kilometers. In this regard, a reliable prediction of engineering-geological and hydrogeological conditions of mining is unthinkable without taking into account the regularities of spatial variability of composition, state and properties of rocks. ...
