The application of high speed video system for blasting research
- Canada Centre for Mineral and Energy Technology, Val d`Or, Quebec (Canada). Mining Research Labs.
Since the establishment of the CANMET Experimental Mine in Val d`Or, Quebec in 1991, research activities in rock fragmentation have been carried out not only in the underground laboratory but also in production mines in the north-west Quebec region. Among the instruments available for rock fragmentation, the Kodak EktaPro 1000 Motion Analyzer (also called the high speed video system) has been one of the most useful tools for monitoring blasts in both underground and open pit. This system is capable of recording events at rates from 50 to 12,000 frames per second (fps). The buffer memory has a capacity of storing 2,050 images. To use this system in the underground, a steel box was made with a bullet-proof glass in the front to protect the camera. The processing and recording equipment are placed in an aluminum case which can be located about 30 m away from the camera via an extension cable. For each blast monitored, high frequency geophones and accelerometers were used to monitor ground vibrations and give a timing reference of the explosive detonations to correlate with the observation of the captured images. This paper describes the practical features of the high speed video system, as well as some applications for monitoring blasts in underground mines and in an open pit. The camera protection and lighting set-up for underground application are described in details. Observation analysis and technical findings which have been useful to help the mines improve their blasting practices are also discussed.
- Sponsoring Organization:
- Canada Centre for Mineral and Energy Technology, Ottawa, ON (Canada)
- OSTI ID:
- 433693
- Report Number(s):
- CONF-940144--
- Country of Publication:
- United States
- Language:
- English
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