A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Character of coal measures; roof, floor, and coal seam; subsidence; time element in subsidence, and rate of face advance; collapse of strong roof, after acting as cantilever; collapse of weak roof; bending roof; heaving floor; strength of temporary supports; secondary and tertiary subsidence; systematized roof support. (See - nos. 3547 Dec. 21, 1928, pp. 2468-2470; (discussion) in no. 3566, May 3, 1929, pp. 1718-1720; also Instn. Min. Engrs. -- Trans, vol. 76, part 4, Jan. 1929, pp. 236-254 and 1 supp. page and (discussion) in vol. 77, no. 2, May 1929, pp. 157-164; and Science and Art of Min., vol. 39, no. 13, Jan. 12, 1929, pp. 200-201)
Character of coal measures; roof, floor, and coal seam; subsidence; time element in subsidence, and rate of face advance; collapse of strong roof, after acting as cantilever; collapse of weak roof; bending roof; heaving floor; strength of temporary supports; secondary and tertiary subsidence; systematized roof support. (See - nos. 3547 Dec. 21, 1928, pp. 2468-2470; (discussion) in no. 3566, May 3, 1929, pp. 1718-1720; also Instn. Min. Engrs. -- Trans, vol. 76, part 4, Jan. 1929, pp. 236-254 and 1 supp. page and (discussion) in vol. 77, no. 2, May 1929, pp. 157-164; and Science and Art of Min., vol. 39, no. 13, Jan. 12, 1929, pp. 200-201)
Roof control on longwall faces
Colliery Guardian
Friend, J.F.C. (author)
Colliery Guardian ; 137
1929
2 pages
Article (Journal)
English
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Roof control on longwall faces
| Engineering Index Backfile | 1929
Roof control on longwall faces
| Engineering Index Backfile | 1928
Roof control on longwall faces
| Engineering Index Backfile | 1929
| Engineering Index Backfile | 1932
| Engineering Index Backfile | 1931