A simple solution to assess pore-water pressure in barricades made of waste rock

CIM Journal, Vol. 4, No. 1, 2013
L. Li Department of Civil, Geological and Mining Engineering, Polytechnique Montréal, Montreal, QC

Stope backfilling is a common operation in many underground
mines, which requires a barricade at the base of the stope near the drift
entrance to retain the backfill in place. In this paper, the distribution of
pore-water pressure in barricades made of waste rock is analyzed. An analytical
solution is introduced and applied to estimate the pore-water pressure along the
base and full height of the barricade. Results show that the analytical solution
generally accurately predicts the distribution of pore-water pressure obtained
from the numerical calculations, especially in the upstream part of the
barricade, where it is most critical.
Keywords: Mine backfill, Barricade, Analytical solution, Numerical simulations, Seepage, Pore-water pressure
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