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在总结国内外已有的经验的基础上,从下列几方面较深入地探讨了北山地区的地壳稳定性问题:区域大地构造特征及其演化历史,区域地球物理场特征及地壳结构分区,区域深断裂特征,区域地震活动性,区域新构造运动特征,区域现代构造应力场及其计算机模拟,TM遥感影像地质解译在地壳稳定性研究中的应用,以及区域地壳稳定性评价。研究结果表明,研究区可划分成八个不同的稳定性区域。其中,北山稳定区条件最好,其地壳稳定性符合国际原子能机构1994年安全指南111-G-4.1对高放废物处置库场地预选的要求,可以作为处置库预选区,开展进一步的场址筛选和场址特性评价等工作。
On the basis of summarizing the existing experiences both at home and abroad, the paper discusses the crustal stability in the Beishan area from the following aspects: the regional tectonic features and evolution history, the characteristics of the regional geophysical field and the crustal structure zoning, the deep area Fault characteristics, regional seismic activity, regional tectonic movement characteristics, regional modern tectonic stress field and its computer simulation, application of TM remote sensing image geological interpretation in crustal stability studies, and regional crustal stability assessment. The results show that the study area can be divided into eight different stability areas. Among them, the Beishan stability zone is the best one, and its crustal stability conforms to IAEA Safety Guide 111-G-4.1 for the pre-selection of the HLW disposal site, which can be used as the pre-selection area of the repository for further site screening And site characterization and other work.