Abstract
Sublevel stoping methods with delayed backfill are employed for mining tabular steeply dipping ore bodies. Cemented rockfill (CRF) is a type of backfill with simple operation, moderate capital cost while acquiring good strength. CRF stope is subjected to blast-induced vibrations during production blasting in adjacent stopes. Excessive dynamic load may destabilise backfill stope that leads to dilution of precious ore. Blast-induced vibrations can be monitored to assess the stability of CRF and to determine the blast waveforms for a detailed analysis using numerical models. This paper aims to establish that excessive blast-induced vibrations are the prime cause of backfill dilution at the case study mine. A detailed methodology and results of monitoring blast-induced vibrations in backfill are also presented. Blast vibrations are monitored in a CRF stope using three dimensional geophones and blast vibration monitors. The monitoring results obtained are processed and analysed to produce results in terms of velocity components and vector sum of velocity components. The data is further processed to examine particle velocity vs.
Original language | English |
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Pages (from-to) | 119-136 |
Number of pages | 18 |
Journal | International Journal of Mining, Reclamation and Environment |
Volume | 31 |
Issue number | 2 |
DOIs | |
State | Published - 17 Feb 2017 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2015 Taylor & Francis.
Keywords
- blast vibrations
- cemented rockfill
- mine backfill
- monitoring
- sublevel stoping
- Underground mining
ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology
- Geology
- Earth-Surface Processes
- Management of Technology and Innovation