Study of the efficiency of conveyors of mining transport systems of mining complexes Maxsud. Kalandarovich Bobojanov, Oripovich Eshmurodov Ziyodulla, Muhriddin Tulkin ugli Ismoilov, Eldor Izam ugli Arziev and Gulnoza Ziyodullaevna Togaeva E3S Web Conf., 177 (2020) 03023 Published online: 08 July 2020 DOI: 10.1051/e3sconf/202017703023