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Method of measuring crustal stress by hydraulic fracture based on analysis of crack growth in rock
Method of measuring crustal stress by hydraulic fracture based on analysis of crack growth in rock
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机译:基于岩石裂纹扩展分析的水力压裂法测量地壳应力的方法
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摘要
Earth's crustal stress is measured by drilling a bore-hole in rock body, producing a longitudinal crack at a selected portion thereof with or without a natural traverse crack through intermittent application of hydraulic pressure thereat while measuring the pressure at different stages of crack production, producing an artificial traverse cracks through the use of a prenotch, determining orientations of the cracks thus produced by inspecting the bore-hole surface conditions, and numerically analyzing the crack orientations and the pressures at different stages of crack production.
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