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Experimental investigation and fundamental principles; dynamometer prop and subsidence tests; behavior of props and lids; packs; rate of advance; condition of roof and floor subsidence and leveling tests; fractures; factors in roof control. (See also - (discussion) p 23-34, partly on p. 2221, vol. 142 nos. 3661 and 3678, Feb. 27, 1931, pp. 745-747, June 26, pp. 2223-2225,; Min. Inst. Scotland -- Trans., vol. 52, part 2, June 17, 1931, pp. 13-38, and (discussion) 39-45, 14 figs.; Iron and Coal Trades Rev., vol. 122, nos. 3287, 3288 and 3304, Feb. 27, 1931, p. 366, Mar. 6, p. 396 and June 26, pp. 1022-1023, 2 figs. and Instn. Min. Engrs. -- Trans., vol. 81, pt. 4, July 1931, pp. 373-398 and (discussion), 399-405, 14 figs)
Experimental investigation and fundamental principles; dynamometer prop and subsidence tests; behavior of props and lids; packs; rate of advance; condition of roof and floor subsidence and leveling tests; fractures; factors in roof control. (See also - (discussion) p 23-34, partly on p. 2221, vol. 142 nos. 3661 and 3678, Feb. 27, 1931, pp. 745-747, June 26, pp. 2223-2225,; Min. Inst. Scotland -- Trans., vol. 52, part 2, June 17, 1931, pp. 13-38, and (discussion) 39-45, 14 figs.; Iron and Coal Trades Rev., vol. 122, nos. 3287, 3288 and 3304, Feb. 27, 1931, p. 366, Mar. 6, p. 396 and June 26, pp. 1022-1023, 2 figs. and Instn. Min. Engrs. -- Trans., vol. 81, pt. 4, July 1931, pp. 373-398 and (discussion), 399-405, 14 figs)
Longwall roof control
Colliery Guardian
Winstanley, A. (author)
Colliery Guardian ; 143
1931
3 pages
14 Figs.
Article (Journal)
English
© Metadata Copyright Elsevier B. V. All rights reserved.
Engineering Index Backfile | 1932
|Roof control in longwall workings
Engineering Index Backfile | 1931
|Roof control on longwall faces
Engineering Index Backfile | 1929
|Roof control in longwall workings
Engineering Index Backfile | 1931
|Roof control on longwall faces
Engineering Index Backfile | 1929
|