长江科学院院报2018，Vol.35Issue(3)：85-91,7.DOI:10.11988/ckyyb.20171135
钻孔孔壁切缝解除地应力测试方法数值模拟研究及工程应用
Method of Geostress Relieving and Measuring by Borehole Slots:Numerical Analysis and Engineering Application
摘要
Abstract
To overcome the difficulty of geostress measurement in high geostress environment,we discussed the opti-mization of narrow slot depth and slot layout by numerical simulation,and applied the method of geostress relieving by borehole slots to the stress measurement of Jinping projects's underground laboratory. Numerical simulation sug-gest that when initial stress field is dominated by stress component parallel to the slot direction,the required depth of slot for complete release of stress on both sides of the slot reaches the maximum 16 mm. In field test, only one slot is arranged at a given depth in the borehole to improving the reliability of experiment and avoiding the mutual influence between the narrow slots.Meanwhile,the slot spacing is generally greater than 200 mm.The measured re-sult shows that the rock mass at test site is in high geostress state,which is in accordance with the core disking in the process of drilling.关键词
钻孔孔壁切缝解除法/地应力/切缝深度/数值模拟/锦屏地下实验室Key words
geostress relieving by borehole slot/geostress/slot depth/numerical simulation/Jinping underground laboratory分类
建筑与水利引用本文复制引用
李永松,彭潜,尹健民,艾凯..钻孔孔壁切缝解除地应力测试方法数值模拟研究及工程应用[J].长江科学院院报,2018,35(3):85-91,7.基金项目
国家重点研发计划项目(2016YFC0401800) （2016YFC0401800）
西藏自治区科技计划项目(2015xz01a33) （2015xz01a33）
