发明名称 |
Method of measuring crustal stress by hydraulic fracture based on analysis of crack growth in rock |
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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申请公布号 |
US4665984(A) |
申请公布日期 |
1987.05.19 |
申请号 |
US19860896218 |
申请日期 |
1986.08.14 |
申请人 |
TOHOKU UNIVERSITY |
发明人 |
HAYASHI, KAZUO;SHOJI, TETSUO;NIITSUMA, HIROAKI;TAKAHASHI, HIDEAKI;ABE, HIROYUKI |
分类号 |
E21B43/26;E21B47/02;E21B49/00;G01L5/00;G01V1/00;(IPC1-7):E21B43/26;E21B47/06 |
主分类号 |
E21B43/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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