高放废物处置库花岗岩热–力耦合模拟研究

 根据典型高放废物处置库概念模型，应用FLAC3D有限差分程序模拟计算了数百年内热–力耦合(TM)条件下高放废物地质处置库围岩的温度场、应力场和变形场的变化特征，初步得到在一定废物罐热源强度及衰变函数条件下花岗岩体的热力学特征及处置巷道工程设计的合理间距。模拟结果表明：在－500 m水平建造处置库，按设定的释热强度，处置坑合理间距为8～12 m，废物罐表面温度为130 ℃，处置坑中线岩体最高温度为40 ℃，并保持数百年左右。

COUPLED THERMO-MECHANICAL ANALYSIS OF GRANITE FOR HIGH-LEVEL RADIOACTIVE WASTE REPOSITORY

Based on the conceptual model of high-level radioactive wastes(HLW) repository，the temperature field，stress field and deformation field of HLW repository surrounding rock are calculated under the condition of thermo-mechanical(TM) coupling by using finite difference program FLAC3D. From this study，the thermo- mechanical characteristic of granite is obtained primarily under the given canister heat source and the decay law function is presented. These results show that the reasonable spacing between disposal hole is 8–12 m，and the peak temperature of the canister surface is 130 ℃，the centerline temperature among pits is about 40 ℃，which lasts for about hundreds of years under given heating output at depth of －500 m.