00000nam 2200000zi 4500 9.869394 CaOODSP 20221107162835 m o d f cr ||||||||||| 190307t19631963onc #ot f|0| 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn--- M38-1/117-1963E-PDF M38-1/117 King, Lewis H., 1924- author. Electrical resistivity measurements on western Canadian coals / Lewis H. King, Fuels and Mining Practice Division. Ottawa : Department of Mines and Technical Surveys, Mines Branch, July 1963. ©1963 1 online resource (v, 33 pages) text txt rdacontent computer c rdamedia online resource cr rdacarrier Research report ; R 117 Digitized edition from print [produced by Natural Resources Canada]. Title from cover. Includes bibliographic references. "Field resistivity measurements were made in advance of a coal face to determine the probability of encountering outbursts as the coal was mined. This field work led to the measuring of resistivity on laboratory specimens in order to ascertain the influence of adsorbed methane, carbon dioxide, and moisture. The laboratory work shows that moisture, but not adsorbed gases, can account for the large resistivity fluctuations encountered in the field. The field measurements apparently detect fracturing in the coal ahead of an advancing face when the fractures are saturated with moisture, but outbursts cannot be predicted from the measurements"--Abstract. Includes abstract in French. gccst Coal Canada. Department of Mines and Technical Surveys. Canada. Mines Branch. Research report (Canada. Mines Branch) R 117. (CaOODSP)9.855660 PDF 2.00 MB https://publications.gc.ca/collections/collection_2019/rncan-nrcan/m38-1/M38-1-117-1963-eng.pdf