NIKITIN, Oleg; SABANOV, Sergei. IMMEDIATE ROOF STABILITY ANALYSIS FOR NEW ROOMAND- PILLAR MINING TECHNOLOGY IN “ESTONIA” MINE. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 262–269, 2005. DOI: 10.17770/etr2005vol1.2138. Disponível em: https://journals.ru.lv/index.php/ETR/article/view/2138.. Acesso em: 4 dec. 2024.