With reference to Problem 9, determine the maximum possible roof span, given that all roof rock must have a safety factor greater thanone To (102) psi (MPa) Co (103, psi (MPa) E (106) psi (GPa) Rock type Unit y pef (kN m) h ft (m) v( ) 11 2 (77 2) 6 0 (41 4) 0 35 (2 4) 7 5 (51 7) 155 (24 5) 138 (21...

Given Problem 9 conditions and all layers must be safe ie FS 1 Find Lm ...

With reference to Problem 9, determine the maximum possible roof span, given that all roof rock must

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With reference to Problem 9, determine the maximum possible roof span, given that all roof rock must have a safety factor greater thanone.

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Design Analysis in Rock Mechanics

ISBN: 978-0415893398

1st edition

Authors: William G. Pariseau

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Question Posted: Mar 17, 2011 04:14 AM

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