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Keywords: gas concentration
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Proceedings Papers
Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-116
... irritation. The presence of hydrogen sulfide (H 2 S) gas as high as 200ppm was soon tested positive by gas detectors and subsequently the ventilation fans (2*110kw) speed were boosted to 1450rpm in order to dilute the gas concentration to safe levels (10ppm). Nonetheless, the work continued at a rather...
