Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Deep mine stress determinations using flatjack and borehole deformation methods
Estimate of vertical component of stress about 2 ft into rib at station along haulage drift on 6100-level of Idaho mine by flatjack method is 5875 psi, whereas borehole deformation procedure at this station yielded value of 5500 psi for same depth into rib; test zone is 5625 ft below surface; no attempt was made to extrapolate stress estimates beyond depth of flatjack installation.
Deep mine stress determinations using flatjack and borehole deformation methods
Estimate of vertical component of stress about 2 ft into rib at station along haulage drift on 6100-level of Idaho mine by flatjack method is 5875 psi, whereas borehole deformation procedure at this station yielded value of 5500 psi for same depth into rib; test zone is 5625 ft below surface; no attempt was made to extrapolate stress estimates beyond depth of flatjack installation.
Deep mine stress determinations using flatjack and borehole deformation methods
U S Bur Mines -- Report Investigations
Ageton, R.W. (Autor:in)
1967
25 pages
Report
Englisch
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