Geomechanical assessment of ore drawpoint stability in mining with caving

Abstract

The authors solve the problem on stress-strain state of adjacent rocks of ore passes arranged in the face area under caved ore and the ore passes arranged both lengthwise the stope and in the stope face area (the face ore drawing scheme and the stope-through drawing, respectively) by using the finite element method. The article describes stress distribution in higher stress zones and in distressed areas depending on ore discharge preparation techniques at depths down to 1.5 km.

Geomechanical assessment of combination geotechnology for thick flat-dipping ore bodies

“…Assessment of rock stability in pillars and roofs of the undercuts used the Mohr-Coulomb criterion [7,[9][10][11]. The post-limit deformation domains in the rock mass were found using the safety factor s K determined from the equation of straight line Mohr's envelope:…”