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Long-term Rock Noise Plotting Techniques.
NTIS: PB 80-134539 :10 pages
Intermittent mining in the slope section at Dutch Creek No. 1 Mine, Carbondale, Colorado, of the Mid-Continent Coal and Coke Company, has resulted in erratic and minimal rock noise data, which, in turn, has necessitated a change in the method used to plot daily mine noise in order to be useful to the researchers at the mine. Daily and weekly cumulative plots of rock noise under these conditions have not shown significant stress changes as clearly as bimonthly or longer noise rate plots. Hence, longer term cumulative rock noise plots, as described in this Bureau of Mines report, have been added to the data analysis at Dutch Creek No. 1 Mine, and have been shown to delineate unique areas of rock noise activity more clearly than shorter term plots. The longer term plots should aid in the detection and delineation of potential failure areas, when used in conjunction with other proven forms of data analysis.
IH; Report of Investigations
NTIS Accession No.
NTIS: PB 80-134539
Page last reviewed: March 11, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division