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A new rock mass classification system Q(HLW) for high-level radioactive waste disposal

机译：用于高放废物处置的新型岩体分类系统Q（HLW）

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In this paper, a new rock mass classification system named Q(HLW) system is proposed with the purpose of evaluating the suitability of the host rock for high-level radioactive waste (HLW) disposal. In the system, the rock suitability evaluation of two different scales is considered, namely the repository and tunnel scales. The system is developed on the basis of Q-system, and considers both the long-term safety and constructability requirement of the host rock for disposal. Thus, some additional parameters, including the fracture zone, groundwater chemistry and thermal effect are also taken into account in light of their significant influence on the long-term safety of HLW disposal. The avoidance strategy is highlighted in the proposed system by excluding the rock volume with unfavorable conditions, particularly adjacent to the large scale fracture zones. In the proposed system, the Q' index (the product of the first four parameters in Q-method) is considered as the basic constructability index. By incorporating the influence of other parameters, the Q(HLW) system is established in which the suitability of host rock is classified into three classes at the repository and tunnel scales. As a preliminary validation, the system is applied to the Beishan area, a potential region for HLW disposal in China. Using the classification method at the repository scale, the most suitable disposal site in Xinchang block of the Beishan area is identified. The rock classification at the tunnel scale is also carried out along two deep boreholes. The proposed system is found to be a usable tool in identifying suitable rock volume of different scales for HLW disposal. (C) 2015 Elsevier B.V. All rights reserved.
机译：本文提出了一种新的岩体分类系统，称为Q（HLW）系统，旨在评估基质岩对高放废物（HLW）处置的适用性。在该系统中，考虑了两个不同尺度的岩石适宜性评估，即储层和隧道尺度。该系统是在Q系统的基础上开发的，同时考虑了处置用母岩的长期安全性和可施工性要求。因此，鉴于它们对高放废物处置的长期安全性的重大影响，还考虑了一些其他参数，包括裂缝区，地下水化学和热效应。在拟议的系统中，通过排除不利条件下的岩石体积，特别是邻近大型断裂带的岩石体积，来强调避免策略。在提出的系统中，Q'指数（Q方法中前四个参数的乘积）被视为基本的可施工性指数。通过综合考虑其他参数的影响，建立了Q（HLW）系统，在该系统中，在储集层和隧道规模上，主岩的适用性分为三类。作为初步验证，该系统已应用于北山地区，这是中国高放废物处置的潜在地区。利用库区规模分类方法，确定了北山地区新昌区块最合适的处置场。隧道规模的岩石分类也沿两个深孔进行。发现所提出的系统是用于识别不同规模的高放废物处置合适岩石量的有用工具。 （C）2015 Elsevier B.V.保留所有权利。

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