00000nam 2200000za 4500 9.840288 CaOODSP 20221107151815 cr ||||||||||| 170725s1967 oncabd ob f000 0 eng d CaOODSP eng n-cn--- M38-8/28E-PDF M38-8/28 Patching, T. H. (Thomas H.) Occurrence, research and combating sudden outbursts of coal and gas in Canada [electronic resource] / T.H. Patching, University of Alberta ; J.C. Botham, Fuels and Mining Practice Division. Ottawa : Queen's Printer, 1967. 30 p. : charts, ill., map Reprint series ; RS 28 Issued also in French under title: Occurrence, étude et côntrole des dégagements instantanés de charbon et gaz au Canada. Cover title. "Reprinted from International Conference on Problems of Sudden Outbursts of Gas and Rock, Leipzig, October 1966." Historical publication digitized from print 2017 [by Natural Resources Canada]. Includes bibliographical references (p. 19). "In Canada sudden outbursts have occurred only in coal mines. Because outbursts of potash and gas do occur in other countries, and because we are currently opening several new potash mines, we have an interest in their mode of occurrence in saline rocks. However, all of our experiences and studies regarding outbursts have been concerned with those of coal and gas. […] our studies have shown the influence of stress, coal strength and deformation, gas content, and permeability on outburst occurrences. At present the only effective control measure that is applicable in Canadian conditions is shock blasting, and the application of mechanization in outburst-prone seams is restricted by our inability to predict or eliminate these curious and hazardous phenomena"--p. 1, 18. gccst Mining industry gccst Coal gccst Explosions Botham, J. C. Canada. Natural Resources Canada. Canada. Department of Energy, Mines and Resources. Canada. Mines Branch. Occurrence, étude et côntrole des dégagements instantanés de charbon et gaz au Canada (CaOODSP)9.840294 Reprint series - Dept. of Energy, Mines and Resources, Mines Branch ; RS 28 (CaOODSP)9.834843 PDF 4.60 MB https://publications.gc.ca/collections/collection_2017/rncan-nrcan/M38-8/M38-8-28-eng.pdf 300107