Canvas model of the mining regions’ industrial ecosystem based on a circular economy Oleksandr Amosha, Danylo Cherevatskyi, Oleksandr Lyakh, Myroslava Soldak and Yuliya Zaloznova E3S Web Conf., 255 (2021) 01001 Published online: 03 May 2021 DOI: 10.1051/e3sconf/202125501001