In situ backfilll monitoring database

The history of backfilling underground mined-out voids dates back to the beginning mining several centuries ago using rockfill. Currently, there are three major types backfill: rock, hydraulic, and paste fill. When backfill is required be exposed from beside or underneath, cement binder added. Cemented hydraulic fill most commonly used as it has existed for over 80 years. In early 1960s, a series field instrumentations were initiated by US Bureau Mines on These studies conducted in order better understand characteristics backfill. Cemented (CPB) gained wider acceptance industry number operations utilising CPB expanded significantly. One earliest attempts at measurement occurred 20 years ago. Since then, extensive scientific research been material provide mines with rational design process; however, limited published instrumentation programs. authors’ affiliated company involved in-stope programs numerous operations. Because data collection experience, authors have understanding how situ behaves, can use this information safely improve efficiency their operation. safety efficiencies other practitioners, along additional case provided. This paper summarises both results focusing important mechanical properties time onset effective stresses hydrostatic loading (i.e. fluid soil‐like material), influences flushes, thermal expansion contraction, seismic blast events.