Question: Question 4 There are two structural weakness planes emanating from the corners of the sidewall of the opening. The inclinations of the discontinuities are 6

Question 4
There are two structural weakness planes emanating from the corners of the
sidewall of the opening. The inclinations of the discontinuities are 60 and 120
respectively. The unit weight of the rock is 20kNm3, and the height of the opening is
15 m . Determine the total support force per metre length of opening required to
prevent sliding of the rock in the sidewall.
Question 4 There are two structural weakness

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