Calculation of concrete support walls for strength and stability
Abstract
At two-stage development of powerful steeply dipping deposits with replacement of inter-chamber ore pillars with concrete wall supports it is very important to choose the right wall thickness and concrete grade. The methodology of such calculations is insufficiently covered in mining engineering literature. Laboratory studies on models at the Leningrad Mining Institute have shown that inter-chamber concrete supports in mining systems with ore storage or sublevel breaking (with subsequent filling of chambers with backfill) resist lateral loads like thin slabs with different restraint conditions along the contour. The final destruction of the wall under the action of lateral loading occurs from the loss of stability by overturning or shear (wall subsidence).
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