Geohydromechanical processes in the Excavation Damaged Zone in crystalline rock, rock salt, and indurated and plastic clays - in the context of radioactive waste disposal
Geohydromechanical processes in the Excavation Damaged Zone in crystalline rock, rock salt, and indurated and plastic clays - in the context of radioactive waste disposal
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DOI：
10.1016/j.ijrmms.2004.08.003
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发表时间：
2005-01-01
影响因子：
7.2
通讯作者：
Davies, C
中科院分区：
文献类型：
--
作者：
Tsang, CF;Bernier, F;Davies, C
预计在地质构造中的所有人工开口周围会产生开挖扰动区（EdZ）或开挖破坏区（EDZ）。宏观和微观断裂，一般来说，在原地应力的重新分布和岩石结构的重排，将发生在这个区域，导致流动的渗透性的急剧变化，主要是通过裂缝和裂缝引起的开挖。EDZ可能对地下核废料处置库的运行和长期性能产生重大影响。需要评估各种关注的问题，例如在EDZ中产生裂缝的过程、渗透率增加的程度以及该区域密封或愈合（渗透率降低）的可能性。近年来，人们沿着这条路线努力寻找四种岩石类型（结晶岩、盐、硬化粘土和塑性粘土）的潜在处置库，这些努力涉及野外、实验室和理论研究。目前的工作涉及的想法和问题，出现在这四种岩石类型的EDZ在集群会议和研讨会在卢森堡在2003年11月举行的介绍和讨论的综合。首先，开挖扰动和EDZ的定义，这可能适用于所有四种岩石类型，提出。然后，提出了一种方法的综合和相互比较的地质流体力学过程中的EDZ结晶岩，盐，硬化粘土，塑性粘土。制定了相关过程、相关因素以及建模和测试技术的比较表。还讨论了一般国家的最先进的和悬而未决的问题。本文结尾处提供了关于这一主题的大量相关论文参考书目。(C)2004爱思唯尔有限公司保留所有权利。
The creation of an excavation disturbed zone (EdZ) or excavation damaged zone (EDZ) is expected around all man-made openings in geologic formations. Macro- and micro-fracturing, and in general a redistribution of in situ stresses and rearrangement of rock structures, will occur in this zone, resulting in drastic changes of permeability to flow, mainly through the fractures and cracks induced by excavation. The EDZ may have significant implications for the operation and long-term performance of an underground nuclear waste repository. Various issues of concern need to be evaluated, such as processes creating fractures in the EDZ, the degree of permeability increase, and the potential for sealing or healing (with permeability reduction) in the zone. In recent years, efforts along these lines have been made for a potential repository in four rock types-crystalline rock, salt, indurated clay, and plastic clay-and these efforts have involved field, laboratory, and theoretical studies. The present work involves a synthesis of the ideas and issues that emerged from presentations and discussions on EDZ in these four rock types at a CLUSTER Conference and Workshop held in Luxembourg in November 2003. First, definitions of excavation disturbed and EDZs, that may be applicable to all four rock types, are proposed. Then, an approach is suggested for the synthesis and intercomparison of geohydromechanical processes in the EDZ for crystalline rock, salt, indurated clay, and plastic clay. Comparison tables of relevant processes, associated factors, and modelling and testing techniques are developed. A discussion of the general state-of-the-art and outstanding issues is also presented. A substantial bibliography of relevant papers on the subject is supplied at the end of the paper. (C) 2004 Elsevier Ltd. All rights reserved.