摘要
根据我国高放废物地质处置研究开发规划指南、北山预选区实测地质环境参数和处置库围岩和缓冲材料实测性能参数,采用有限差分计算程序FLAC2D模拟不同处置室间距时高放废物处置库热-力耦合条件下的温度场、应力场和位移场规律。经多方案比较,处置室中线间距为2倍处置室直径时,缓冲材料中的最高温度在95℃左右;由于高放废物释热,引起岩体膨胀,产生热应力,在处置室下角部产生应力集中,但均小于处置库围岩的长期强度;处置库围岩产生的膨胀位移,均在其弹性应变范围内,不会引起处置库围岩破坏。该方案可作为北山预选区建造高放废物处置库的参考依据。
According to the R＆D guideline of HLW disposal in China, parameters of deep geological condition and host rock of Beishan candidate site and buffer material, the evolution of temperature, stress and displacement of HLW repository under thermo-mechanical coupling action conition is analyzed using FLAC2D program. When the space between each two HLW disposal pits is 2 times of the diameter of disposal pit, the highest temperature in buffer material is about 95℃, the maximum stress arose by heat expansion of host rock at the corner of disposal pit is less than the long term strength of host rock, and the displacement of host rock is in the range of elastic strain and will not cause rock fracture. This scheme could be considered as the reference for HLW repository at Beishan candidate site.
出处
《铀矿地质》
CAS
CSCD
2009年第6期373-379,共7页
Uranium Geology
关键词
高放废物
深地质处置
热-力耦合
处置室间距
high-level radioactive waste
deep geological disposal
thermo-mechanical coupling
space between disposal pits
