Soil structure of sand quarries territory Yulia Timofeeva, Elena Sukhacheva, Boris Aparin, Vitaly Terleev, Aleksandr Nikonorov and Luka Akimov E3S Web Conf., 157 (2020) 02017 Published online: 20 March 2020 DOI: 10.1051/e3sconf/202015702017