Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Underground mining of soft limestone
Mining of building stone in southwestern part of Soviet Union; width of chambers in Pontian limestone ranges from 3.2 to 14 m; size of protective pillars is 5×5 to 15×15 m; saws produce 10 to 20 cu m of stone per 6 hr shift; zigzag retreating systems make possible extraction of pillars.
Underground mining of soft limestone
Mining of building stone in southwestern part of Soviet Union; width of chambers in Pontian limestone ranges from 3.2 to 14 m; size of protective pillars is 5×5 to 15×15 m; saws produce 10 to 20 cu m of stone per 6 hr shift; zigzag retreating systems make possible extraction of pillars.
Underground mining of soft limestone
Podzemnaya razrabotka myagkikh izvestnyakov
Yablonskii, G.S. (Autor:in)
Gornyi Zhurnal ; 137
1961
3 pages
Aufsatz (Zeitschrift)
Russisch
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