摘要
区域工程地质适宜性评价是高放废物处置库选址的关键问题之一。基于Arc GIS平台,采用综合指数模型对我国高放核废物处置库阿拉善预选区进行了区域工程地质适宜性评价。在现场工程地质调查与资料系统收集的基础上,综合考虑了核废料选址的特殊目的和要求,比选确定岩性、断裂构造、地震、构造应力、地形变作为阿拉善区域工程地质适宜性评价的因子。利用专家-层次分析法确定了各评价指标的权重,基于评价指标及权重的确定,按适宜性好、适宜性较好、适宜性中等、适宜性较差和适宜性差5个级别对阿拉善区域进行了工程地质适宜性分区。评价分区结果为阿拉善预选区高放废物处置适宜性地段选取提供了依据,其中的塔木素和诺日公区段是适宜性良好的两个地段,进一步的选址工作可在这两个地段开展。
High level radioactive waste is the inevitable product of nuclear power development. The whole world has paid more attention to the safe disposal of the waste so as to maintain the sustainable development of nuclear power. Regional suitability assessment of engineering geology is one of the key tasks when siting the repository of high-radioactive waste disposal. Alxa area is one of the pre-selected areas for high level radioactive waste disposal in China. In order to identify pre-selected sites with good engineering geology in this area,the regional suitability assessment of engineering geology is necessary. Based on comprehensive index model and ArcGIS system,the regional engineering geology suitability of pre-selected Alxa region for high-level radioactive waste disposal is assessed. In comprehensive index model,the selection of assessment factors and determination of the weight value of factors are important. Due to the special purpose and requirements of high-radioactive waste site selection,the selection of assessment factors is different from that surface engineering. For example,the topography and rainfall factors are not in the consideration of high-radioactive waste site selection. According to field engineering geological survey and comprehensive data collection, lithology, faults,seismic,tectonic stress and tectonic terrain are selected as assessment factors. Considering the characteristics of multi-objective and fuzziness in suitability evaluation of high-radioactive waste disposal,analytic hierarchy process is used to determine the weight of each factor. On the basis of these factors,the comprehensive index is obtained. Then engineering geology suitability of Alxa region is classified into five levels according to the comprehensive index. They are respectively the better suitability,the good suitability,the moderate suitability,the poor suitability and the worse suitability. Evaluation results can provide reference for siting the repository of high-radioactive waste disposal. It is considered that the better suitability area and good suitability area in the assessment map can be considered as the site area. Among these area,Tamusu and Nuorigong are two sections with the level of the better to good suitability. Further site selection work can carried out in these two sections.
作者
王学良
韩振华
张路青
周剑
WANG Xueliang;HAN Zhenhua;ZHANG Luqing;ZHOU Jian(Key Laboratory of Shale Gas and Geoengineering,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029;University of Chinese Academy of Sciences,Beijing 100049)
出处
《工程地质学报》
CSCD
北大核心
2018年第6期1715-1723,共9页
Journal of Engineering Geology
基金
国防科工局科研项目“内蒙古阿拉善高放废物地质处置备选场址预选及评价研究”资助.
关键词
区域工程地质适宜性
高放废物
综合指数模型
专家-层次分析法
阿拉善
Regional suitability assessment of engineering geology
High-level radioactive waste
Comprehensive index model
Expert-analytic hierarchy
Alxa