Question: Consider two parallel, circular tunnels in an elastic rock mass with an in - situ stress field 2 ( sigma ) v = ( sigma

Consider two parallel, circular tunnels in an elastic rock mass with an in-situ stress field 2(sigma)v=(sigma)h. Evaluate the tangential stress and the spring line and at the midpoint between the tunnels for the following conditions:
a. The tunnels are one diameter apart
b. The tunnels are two diameters apart

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