The decisions of the XXI Congress of the CPSU on its seven-year plan for 1959‑1965 provide for a further increase in coal production by 21‑23%, mainly due to the development of the eastern regions of the country, including Kuzbass. Coal reserves of Kuzbass are concentrated mainly in the Prokopiev‑Kiselevsky district, located in the south‑western part of the basin. The strata of this region lie in the form of a number of synclinal folds with angles of inclination of the limbs, as a rule, 50°‑70°. In some cases they decrease to 40°, in others they increase to 90°; in the hinge parts of the folds, the angles of dip of the strata decrease to 10°. Coal deposits of the region are exposed by a large number of active mines and exploration wells, which made it possible to trace the deposits of the region quite accurately at depths of more than 1000 meters.