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1 INTRODUCTION The use of cemented paste backfill (CPB) is an in-

The use of cemented paste backfill (CPB) is an in-
creasingly important component of underground
mining operations and is becoming a standard prac-
tice for use in many cut-and-fill mines around the
world (Landriault et al. 1997, Naylor et al. 1997).
Backfill material is placed into previously mined
stopes to provide a stable platform for the miners to
work on and ground support for the walls of the ad-
jacent adits as mining progresses by reducing the
amount of open space which could potentially be fill
by a collapse of the surrounding pillars (Barret et al.
1978). The use of underground paste backfill pro-
vides ground support to the pillars and walls, but
also helps prevent caving and roof falls, and en-
hances pillar recovery, which enhances productivity
(Coates 1981). Thus, the CPB placement provides an
extremely flexible system for coping with changes
in geometry of the orebody, that result in changing
stope width, dip, and length (Wayment 1978). The


Source: Aubertin, Michel - Département des génies civil, géologique et des mines, École Polytechnique de Montréal


Collections: Engineering; Environmental Management and Restoration Technologies