Overcoring in highly stressed granite: Comparison of USBM and modified CSIR devices
作者： C. D. Martin , R. C. Christiansson
DOI: 10.1007/BF01045032
关键词: Mean stress 、 Industrial research 、 Geology 、 In situ stress 、 Borehole 、 Mining engineering 、 Geotechnical engineering 、 Geotechnical Engineering and Engineering Geology 、 General Engineering 、 Earth and Planetary Sciences (miscellaneous) 、 General Earth and Planetary Sciences 、 Civil and Structural Engineering 、 General Environmental Science
摘要: An overcoring program in three nearly orthogonal boreholes, intersecting the same rock volume, was carried out highly stressed Lac du Bonnet granite at 240-m level of Underground Research Laboratory (URL). The designed to determine if more commonly used United States Bureau Mines borehole deformation gauge (USBM gauge) gave similar situ stress results as a modified Council Scientific and Industrial (CSIR) triaxial strain cell. A total 15 successful USBM tests 17 CSIR were out. measured mean tensor for fell within 90% confidence limits results.
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