Calculations of Strength of Overburden Dumps on Weak Bases
S. P. BAKHAEVA, V. A. GOGOLIN, I. A. ERMAKOVA
Gorbachev Kuzbass State Technical University, ul. Vesennyaya 28, Kemerovo, 650000 Russia
Keywords: отвал, слабое основание, метод конечных элементов, напряженно-деформированное состояние, смещение, критерий прочности Кулона-Мора, dump, weak base, finite element method, stress state, displacement, Mohr-Coulomb strength criterion
Abstract
The scope of the discussion covers the issues of open pit mining efficiency and safety with dry overburden dumping over clayey alluvium. The stress analysis of a dump at Kedrovsky open pit mine uses finite element modeling of linearly deformable medium based on geotechnical, surveying and hydromechanical data. The modeling produces the field of displacements of the dump and its base and the distribution of the Mohr-Coulomb strength criterion. The clayey rock breakout-hazardous areas are revealed, and displacements of the growing dump are predicted. The developed model enables operational forecasting of strength loss at dumps.
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