甘肃省陇东地区粘土岩基本特性研究  

Reserch of Claystone in Longdong Area Gansu Province

作　　者：车申[1] 刘晓东[1] 刘平辉[1] 

机构地区：[1]东华理工大学,江西抚州344000

出　　处：《东华理工大学学报（自然科学版）》2011年第2期111-116,共6页Journal of East China University of Technology(Natural Science)

摘　　要：高放废物地质处置库围岩的选择至关重要，各有核国家都对处置库可能的围岩进行了系统研究。从国外经验和国内前期研究成果来看，我国粘土岩是高放废物地质处置库建设中重要的候选围岩之一。对陇东地区进行了地质调查，介绍了该地区的区域构造和区域地质特征，重点对该地区的粘土岩的基本性质进行研究。研究结果结果表明，该地区的粘土岩真密度在2．37～2．65g／cm^3之间，自然块体密度在2．30～2．60g／cm^3之间，天然含水率在2％～5％，孔隙率在3．60％～4．80％之间，粘土岩的渗透系数基本在10～11m／s左右，比表面为12．6～21．2m^2／g，平均为16．7m^2／g。参照国外发达国家粘土岩处置库的选址要求、准则和我国高放废物地质处置库选址要求，陇东地区粘土岩的特性符合我国高放废物地质处置库围岩的选择标准，其中渗透性能和吸附性能的优势是其它候选围岩不可比拟的。It is key point to choose the host rock of disposal high-level radioactive waste, each country which have nuclear operation a systematic reaserch about host rock. From the aboard development and internal prereaserch, in China, claystone is one of the important alternative host rock to disposal HLW. The artical is about geological investigation in Longdong area, regional structure and regional geological features of this area are introduced. The characteristics of clay rock indicate that clay rock true density range from 2.37 g/cm3 to 2.65 g/cm3, the density of nature block is from 2.30 to 2.60 g/cm3 , natural water content is from 2% to 5% ,Porosity rang from 3.60% to 4.80%. the clay rock permeability coefficient almost is 10 tollm/s, specific surface range from 12.6 to 21.2 m2/g（avergae isl6.7mE/g）. Referring to the requirements and standards of clay rock disposal repository site se- lection in foreign developed countries, and according to the requirements of high-level radioactive waste geological repository in our country, we infer that the clay rocks in Longdong region basically meet the requirements of high level radioactive waste geological repository, especially the Porosity and adsorption performance of the clay rocks more suitable for high-level radioactive waste geological repository than other candidate surrounding rock.

关 键 词：地质处置库 围岩 粘土岩 特性 

分 类 号：TL942[核科学技术—辐射防护及环境保护]