The stresses relative to compass coordinates (x = east, y = north, z = up) are xx

Question:

The stresses relative to compass coordinates (x = east, y = north, z = up) are σxx = 2,155, σyy = 3,045, σzz = 4,200, τyx = −1,222, τxz = 0, τyx = 0, in psi with compression positive. Suppose a circular tunnel is driven due east by a tunnel boring machine. Estimate the peak compressive and tensile stress concentrations and show locations in a sketch.