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A platform for research: civil engineering, architecture and urbanism
Application of yieldable steel mine arches to previously uncontrollable roof problem, even with roof bolting, at central Pennsylvania coal mine; sudden and extensive collapses called pressure caves in roof were encountered in advanced developments; successful use of yieldable arches in straight line entries and cross cuts led to design of special graduated size sets for use in intersections; pressure caves were stopped completely when they encountered yieldable arches installation.
Application of yieldable steel mine arches to previously uncontrollable roof problem, even with roof bolting, at central Pennsylvania coal mine; sudden and extensive collapses called pressure caves in roof were encountered in advanced developments; successful use of yieldable arches in straight line entries and cross cuts led to design of special graduated size sets for use in intersections; pressure caves were stopped completely when they encountered yieldable arches installation.
Yieldable mine arches in haulageways
Min Congress J
May, G.L. (author)
1962
4 pages
Article (Journal)
English
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