Research concerning appraisal and control of pillar stability in the case of the dry salt mining method in Romania

by Arad, Victor, Arad, Susana, Danciu, Ciprian
Source: 1. 8th Conference on environment and mineral processing, part I 1. Ostrava : Vysoká škola báňská - Technická univerzita, 2004 1. 80-248-0558-8 1. S. 55-60