This video is of our Stemming
Performance Study (Field Study 3) conducted in September 2003 by DBA Consulting.
As you view the video, please
pay particular attention to the difference in stemming retention between the
left side of the shot vs. the right side of the
Left side of video
39ms = Average retention time of crushed rock, stemmed holes
side of video
120ms = Average retention time of VARI-STEM with crushed rock
145ms = Average retention time of VARI-STEM with sand consistent drill
Also please note the more
pronounced, deeper Energy Trough. The trough extends deeper towards the toe of
the wall on the right side of the shot where our VARI-STEM Plugs were used.
A deeper energy trough results in better diggabilty.
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