Justification of Secondary Mining of Potassium Reserves
a:2:{s:4:"TYPE";s:4:"TEXT";s:4:"TEXT";s:66:"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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