Calculating the roof sag in working spaces of longwall...

Calculating the roof sag in working spaces of longwall faces in flat-lying seams

Yu. F. Savenko, V. I. Chernyaev
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Volume:
5
Language:
english
Pages:
4
DOI:
10.1007/bf02501900
Date:
March, 1969
File:
PDF, 303 KB
english, 1969
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