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What's the point of stating, "Many geologists believe that the current disaster at the Crandall Canyon Mine in Emery County, Utah was caused by retreat mining and a subsequent mountain bump"? This looks like personal opinion and rank speculation in the absence of any factual evidence. It's not like seismic events and even mountain bumps from mines can't be caused by other events. In fact, in this article itself, it is stated that support pillars can collapse causing bumps. Unless factual support can be added, the speculation should be removed.
75.72.47.12815:56, 17 August 2007 (UTC)reply
I take your point in that the footnote reference from KSL doesn't say what the cause was, but what the cause wasn't: "The University of California at Berkeley tonight confirms what seismologists have said from the beginning: The collapse inside the Crandall Canyon Mine was not caused by an earthquake." I suggest we reword accordingly. If other seismologists are more hesitant in their conclusions or do think an earthquake was involved, that fact should be added with its own reference-
Barte16:09, 17 August 2007 (UTC)reply
This is a term I had never heard of before the Utah mine incident. Its not a proper industry term, what you are refering to is more commonly called a rock burst, although coal miners sometimes refer to them as 'bumps' or bounces not mountain bumps. The reason is you can usually feel them is that the siesmic waves are transmitted to your body. Anyway it seems this term was used in this incident by an offical (I don't know who) and propogated by the media, as a google search will show.
Djoeyd11422:47, 20 August 2007 (UTC)reply
Actually, the article cites two sources, one from
1987 and one from
1973 that both use the term "coal mine bump," so the term does predate the Utah mine incident. Personally, I think "coal mine bump" or "mine bump" should be the article title, instead of "mountain bump." (Note that
coal mine bump does redirect here already.) --
HiEv07:03, 31 August 2007 (UTC)reply