"The mining and production of coal by underground mining operations has long been recognized as one of this nation's most hazardous industries. Tabulated data from the State of Illinois, for example, reveal that in that State between 1882 and 1945 there have been 7,789 men killed in coal mining accidents of one form or another. Further inspection of the data indicates that 3,711 of these men were killed underground by falls of roof or rock….
As previously stated, this experiment was designed to determine whether or not any appreciable change in strength as measured by Transverse Breakage would result from moisture changes in mine atmospheres; therefore, after the sample specimen groups were prepared, they were placed under during conditions in these types of environment for curing:
- Under conditions of curing at room temperature exposed to normal air.
- Under conditions of curing at room temperatures in a confined atmosphere exposed to Calcium Chloride desiccant.
- Under conditions of curing at room temperatures in a confined atmosphere under condition of 100 per cent humidity"--pages 1, 12.
Forrester, James Donald, 1906-1979
Vine, William A.
Mining and Nuclear Engineering
Professional Degree in Mining Engineering
Missouri School of Mines and Metallurgy
v, 32 pages
© 1950 Rolf W. Roley, All rights reserved.
Thesis - Open Access
Library of Congress Subject Headings
Mine roof control -- Testing
Coal mines and mining -- Illinois
Shale -- Illinois -- Testing
Shale -- Moisture
Print OCLC #
Electronic OCLC #
Link to Catalog Recordhttp://laurel.lso.missouri.edu/record=b1068183~S5
Roley, Rolf W., "Experimental studies of the effect of moisture on strength of mine roof-shales" (1950). Professional Degree Theses. 291.