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 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; Colliery Guardian, vol. 137, nos. 3547 and 3548, Dec. 21 and 28, 1928, pp. 2468-2470 and 2570-2571 and discussion in no. 3566, May 3, 1929, pp. 1718-1720)
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 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; Colliery Guardian, vol. 137, nos. 3547 and 3548, Dec. 21 and 28, 1928, pp. 2468-2470 and 2570-2571 and discussion in no. 3566, May 3, 1929, pp. 1718-1720)
Roof control on longwall faces
Iron Coal Trades Rev
Friend, J.F.C. (author)
1928
Article (Journal)
English
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Roof control on longwall faces
| Engineering Index Backfile | 1929
Roof control on longwall faces
| Engineering Index Backfile | 1929
Roof control on longwall faces
| Engineering Index Backfile | 1929
| Engineering Index Backfile | 1932
| Engineering Index Backfile | 1931