Sources of alternative types of energy in system of hydro-engineering structures of angrenskaya mine of brown coalSalimjon Yakubov, Bakhriddin Khasanov, Ashirbek Muratov, Farida Yunusova, Donobuvi Atajanova and Alibek ChorievE3S Web of Conf., 401 (2023) 02014DOI: https://doi.org/10.1051/e3sconf/202340102014