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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。
More than 250 hydraulic fracturing tests have been conducted in the Canadian Shield since 1997 as part of a site survey of various hydro projects in Quebec, all in the Grenville and Super-Geological Provinces where bedrock By the crystalline igneous and metamorphic rocks. The hydraulic fracturing test is to determine the increase of rock mass permeability under hydraulic conditions and then to define the upper limit of tunnel lining load. The results of different experiments show that the rock mass properties of large-scale crystalline rocks are similar when the depth is less than 150m. We present an analysis of the minimum stress statistics from closed curves and P-Q plots and compared them to the leaks of pressure tunnels in service. The method of interpretation used also plays a key role in solving the minimum principal stress. Therefore, the ratio of rupture and rupture stress is an important parameter in the analysis.