00000nam 2200000zi 4500 9.869951 CaOODSP 20250130164156 m o d f cr nn||||||||| 190314t19701971oncad obt f000 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn--- M38-1/226-1970E-PDF M38-1/226 Coates, D. F., 1923- author. Some observed deformations underground in various Canadian mines / D.F. Coates and W.G. Muir, Mining Research Centre. Ottawa : Department of Energy, Mines and Resources, Mines Branch, October 1970. ©1971 1 online resource (vi, 23 pages) : illustrations, charts. text txt rdacontent computer c rdamedia online resource cr rdacarrier Research report ; R 226 Cover title. Digitized edition from print [produced by Natural Resources Canada]. "October 1970." Includes bibliographical references (pages 21-23). "Over the years research work has been conducted in Canada on deformations underground resulting from mining. Most of the work has been done in coal mines, some in salt and potash mines, and increasingly in metal mines. The measurements are associated primarily with room- or stope-and-pillar mining, only a modest amount of work having been done in connection with longwalls. Most of the work has been done to obtain information for developing more effective support methods"--Summary, page i. Includes summary in French. gccst Mining industry Muir, George W., author. Canada. Department of Energy, Mines and Resources. Canada. Mines Branch. Canada. Mining Research Centre. Research report (Canada. Mines Branch) R 226. (CaOODSP)9.855660 PDF 1.41 MB https://publications.gc.ca/collections/collection_2019/rncan-nrcan/m38-1/M38-1-226-1970-eng.pdf