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  Induced stress management in underground mining excavations

  The task of mining the rock body of a naturally distributed ore system is highly complex. This implies fill the mined voids and chambers with fill material of minor strength moduli. This condition may lead to structural unbalance, where the fill performs only as a strain buffer agent. This unbalance progressively subjects the adjacent pillars to overstress beyond the design values. The pillars, in turn, are further mined to reduced their sections, thus originating high stresses that dynamically worsen the overall mining system. It is therefore very important to manage with precision a series of parameters that lead to rational mining practices. This work shows practical examples of induced stress management, and makes contributions to this difficult underground mining issue.

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