A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Method involves reinforcement of roof material to provide additional beam strength; as applied to coal mining, it is possible to tie or bind together several thinly bedded rocks to simulate thick bed, thus providing competent beam of roof material from "rib to rib" across opening to prevent flexure of immediate roof; this in turn will minimize or prevent falls of roof; method has been applied effectively for more than 20 yr in mines of St Joseph Lead Co, in southeastern Missouri.
Method involves reinforcement of roof material to provide additional beam strength; as applied to coal mining, it is possible to tie or bind together several thinly bedded rocks to simulate thick bed, thus providing competent beam of roof material from "rib to rib" across opening to prevent flexure of immediate roof; this in turn will minimize or prevent falls of roof; method has been applied effectively for more than 20 yr in mines of St Joseph Lead Co, in southeastern Missouri.
Roof suspension supports
Coal Min
Metcalfe, A. (author)
Coal Mining ; 26
1949
Article (Journal)
English
© Metadata Copyright Elsevier B. V. All rights reserved.
Engineering Index Backfile | 1961
| Engineering Index Backfile | 1914
Engineering Index Backfile | 1907
Engineering Index Backfile | 1961
Classification of roof supports
| Engineering Index Backfile | 1963