Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preventing mine subsidence in Pennsylvania
Hydraulic backfilling project of abandoned mine workings was undertaken in Wilkes-Barre in order to protect surface area of 58 acres; controlled flushing technique was used; specifications for project included rehabilitation of old workings to provide ventilation, crushing material to minus 3/4 in., drilling of boreholes, casing through alluvium, erection of hoppers, bulkheads, and drainage boxes, and piping of backfill material.
Preventing mine subsidence in Pennsylvania
Hydraulic backfilling project of abandoned mine workings was undertaken in Wilkes-Barre in order to protect surface area of 58 acres; controlled flushing technique was used; specifications for project included rehabilitation of old workings to provide ventilation, crushing material to minus 3/4 in., drilling of boreholes, casing through alluvium, erection of hoppers, bulkheads, and drainage boxes, and piping of backfill material.
Preventing mine subsidence in Pennsylvania
Coal Today Tomorrow
Corgan, J.A. (Autor:in)
1965
5 pages
Aufsatz (Zeitschrift)
Englisch
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