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首页> 外文会议>International Symposium on Geotechnical Measurements and Modelling; Sep 23-25, 2003; Karlsruhe, Germany >Initial rock stress in the Gorleben salt dome measured during shaft sinking
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Initial rock stress in the Gorleben salt dome measured during shaft sinking

机译：竖井下沉期间测量的戈勒本盐丘中的初始岩石应力

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摘要

The Gorleben salt dome, Germany, has been investigated for its suitability as a site for the final disposal of radioactive wastes. During sinking of the two shafts of the exploration mine a comprehensive geotechnical exploration program has been performed including the measurement of rock temperature, rock deformation, shaft closure, initial rock stress, long-term stress change, and sample collection for laboratory testing. To determine initial rock stress, overcoring tests at three levels in each shaft were carried out. Evaluation of the test data included the determination of necessary material parameters in the laboratory and finite-element modelling of the overcoring method to provide a proper conversion of measured stress-release deformations to stress taking into account the nonlinear time-dependent creep behaviour of salt. The results indicate a more or less isotropic initial stress state in the Gorleben salt dome. The measured stress components agree sufficiently to the theoretical overburden pressure.
机译：已对德国Gorleben盐丘进行了研究，以确认其是否适合作为放射性废物的最终处置场。在探矿井的两个竖井下沉期间，已执行了全面的岩土工程勘探计划，包括测量岩石温度，岩石变形，竖井闭合，初始岩石应力，长期应力变化以及用于实验室测试的样品收集。为了确定初始岩石应力，在每个竖井中的三个水平上进行了过度取芯测试。对测试数据的评估包括在实验室中确定必要的材料参数，并对过芯方法进行有限元建模，以考虑到盐的非线性随时间变化的蠕变行为，从而将测得的应力释放变形正确转换为应力。结果表明戈尔本盐穹顶或多或少各向同性的初始应力状态。测得的应力分量与理论上覆压力足够吻合。

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