Features and Benefits of the Concession Mechanism in the Sphere of Subsoil Management Alexander Myaskov, Zinaida Nazarova, Yuliya Leonidova and Daria Shchedrova E3S Web Conf., 41 (2018) 04020 Published online: 26 June 2018 DOI: 10.1051/e3sconf/20184104020