Justification of Secondary Mining of Potassium Reserves
A. A. Baryakh, N. L. Bel’tyukov, N. A. Samodelkina, V. N. Toksarov
Mining Institute, Ural Branch, Russian Academy of Sciences, Perm, 614007 Russia
Keywords: Междукамерные целики, очистные камеры, природно-техногенный пласт, повторная отработка, натурные испытания, степень нагружения, математическое моделирование, Safety pillars, stopes, natural-manmade seam, secondary mining, full scale testing, loading rate, mathematical modeling
Abstract
The article discusses feasibility of secondary mining of natural-manmade sylvinite seam KrII* in the Upper Kama Potassium Salt Field. The full scale tests of large samples were carried out to determine mechanical properties of seam KrII*. Mathematical modeling provides estimates of load exerted on nonuniform safety pillars after secondary mining. The authors propose alternative flow charts for the secondary mining of natural-manmade seam KrII* to ensure safety and reasonable efficiency of production.
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