加拿大魁北克水电站项目中结晶岩的水压致裂试验
Hydraulic jacking tests in crystalline rocks for hydroelectric projects in Quebec,Canada
摘要
自1997年以来,在加拿大地盾进行了250多次水压致裂试验,该试验是魁北克不同的水电站项目调查选址的一部分,所有项目都位于格伦维尔和超级地质省,那里的基岩由结晶质火成岩和变质岩组成。水压致裂试验是为了确定在水压条件下岩体渗透率的增加,进而定义隧洞衬砌承载的上限。对不同试验结果的研究表明,在深度小于150m时,大规模结晶岩的岩体性质相似。我们给出了来自闭合曲线和P-Q曲线图的最小应力统计数据的分析,并与投入使用的压力隧洞的渗漏相比较。所采用的解释方法也在最小主应力求解中扮演着关键角色。所以破裂和破裂重张压力的比值在分析结果中是一个重要的参数。
出处
《国际地震动态》
2011年第1期83-90,共8页
Recent Developments in World Seismology
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