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Roof control on longwall faces

Friend, J.F.C.

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 - (discussion) 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; Iron and Coal Trades Rev., vol. 117, no. 3174, Dec. 28, 1928, p. 941 and discussion in no. 3192, May 3, 1928, p. 683 and Science and Art of Min., vol. 39, no. 13, Jan. 12, 1929, pp. 200-201)

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Roof control on longwall faces

Friend, J.F.C.

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 - (discussion) 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; Iron and Coal Trades Rev., vol. 117, no. 3174, Dec. 28, 1928, p. 941 and discussion in no. 3192, May 3, 1928, p. 683 and Science and Art of Min., vol. 39, no. 13, Jan. 12, 1929, pp. 200-201)

Roof control on longwall faces

Friend, J.F.C.

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 - (discussion) 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; Iron and Coal Trades Rev., vol. 117, no. 3174, Dec. 28, 1928, p. 941 and discussion in no. 3192, May 3, 1928, p. 683 and Science and Art of Min., vol. 39, no. 13, Jan. 12, 1929, pp. 200-201)

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Title:

Roof control on longwall faces

Additional title:

Instn. Min. Engrs. -- Trans

Contributors:

Friend, J.F.C. (author)

Published in:

Institution of Mining Engineers -- Transactions ; 76

Publication date:

1929

Size:

19 pages

Remarks:

1 supp. page

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Coal mines and mining

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