Mining Engineering > GATE 2025 > In-situ Stress
Hydraulic fracturing method is used to determine the major principal stress (σ1) in an underground rock strata having tensile strength of 6 MPa. The minor principal stress (σ3) in the strata is 8 MPa. If fluid pressure of 10 MPa is required to fracture the vertical borehole in that strata, the magnitude of σ1 in MPa, is ______ (rounded off to 2 decimal places)
Correct : 12.00
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