The Tensile strength in the rock is given by
A. $$ \in T = \left( {2P} \right)L\left( {\pi dt} \right)$$
B. $$ \in T = \left( {2\pi P} \right)L\left( {d{t^2}} \right)$$
C. $$ \in T = \frac{{2PL}}{{DT}}$$
D. $$ \in T = \frac{{4P}}{{\pi dt}}$$
Answer: Option A
This Question Belongs to Mining Engineering >> Mine Supports And Strata Control
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