摘要
目前,一些国家选择硬泥岩作为核废物地质深部处置的围岩。为深入理解硬泥岩在热–水–力(THM)耦合作用下的变化特征,在瑞士的 Mont Terri 地下岩石实验室对 Opalinus 硬泥岩进行了现场加热试验。该试验是利用一电加热器(直径 = 30 cm,长度 = 5.4 m)对硬泥岩进行了 1 a 多的加热,然后降温 0.5 a。加热器表面的最高温度达 100 ℃。在试验过程中,安装了 80 多个测试传感器对硬泥岩中的温度、孔隙水压、气体渗透以及变形进行了监控。通过观察发现围岩受热膨胀且产生明显的孔隙水压升高。距加热器约 1 m 的区域,其孔隙水压从约 1 MPa增高到 4 MPa。最后对试验中观测的硬泥岩受热所产生的热–水–力全过程进行了模拟计算,并介绍了现场测量和数值计算的初步结果。
In order to gain a better understanding of coupled thermo-hydro-mechanical（THM） processes in indurated clays being considered in various countries as host rock for the disposal of high-level radioactive waste, a heating experiment named HE-D is being conducted on the Opalinus clay at the Mont Terri Rock Laboratory in Switzerland. An electric heater of 5.4 m length has heated the clay rock over more than one year. The maximum temperature of 100 ℃ is reached at the heater/rock interface. During the experiment, temperature, pore water pressure, gas migration, and deformation in the clay rock have been monitored by means of more than 80 instruments installed in 24 boreholes. Thermal expansion of the heated rock was observed. In the heated region at distance about 1 m to the heater, the pore water pressure increased from about 1 MPa to 4 MPa. The responses of the clay rock to heating were simulated by coupled THM modeling. Preliminary results of the field measurements and the numerical calculations are presented.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2006年第4期659-669,共11页
Chinese Journal of Rock Mechanics and Engineering
关键词
核废物处置
硬泥岩
现场试验
加热
热-水-力过程
监测
模拟
nuclear wastedisposal
indurated clay
field test
heating
THM processes
monitoring
modeling
作者简介
Corresponding author： ZHANG Chunliang（1957-）, male, Ph. D., gained his M. S. degree in Mining Engineering from Liaoning Technical University in 1984, and Ph.D. degree from Technical University of Clausthah Germany in 1990. His main activities cover geotechnical aspects of host rocks and engineered barriers for geological disposal of nuclear waste. E-maih zha@grs.de
