干旱区生态环境知识资源中心(Arid): 高放废物处置北山预选区深部完整岩石基本物理力学性能及时温效应

Arid

	高放废物处置北山预选区深部完整岩石基本物理力学性能及时温效应
其他题名	BASIC PHYSICO-MECHANICAL PROPERTIES AND TIME-TEMPERATURE EFFECT OF DEEP INTACT ROCK FROM BEISHAN PRESELECTED AREA FOR HIGH-LEVEL RADIOACTIVE WASTE DISPOSAL
	刘月妙 1; 王驹 2; 谭国焕 3; 蔡美峰 1
ISSN	1000-6915
出版年	2007
卷号	26 期号:10 页码:2034-2042
中文摘要	岩石物理力学性能研究是高放废物处置库选址、设计、建造和性能评价中不可或缺的一个重要研究方面.经过全国筛选对比,已初步确定甘肃北山地区为我国高放废物处置库重点预选区.甘肃北山地区深部的主要岩石为似斑状二长花岗岩和英云闪长岩,似斑状二长花岗岩均匀性好,两种主岩均具有高密度、低孔隙率、高力学强度、低变形和高脆性的特性.通过一系列室内蠕变试验,研究在不同温度(室温,50℃,90℃)与围压(单轴,10MPa,30 MPa)条件下,北山花岗岩在不同恒定应力水平下的变形特征与声发射特性,温度和围压对岩石力学性能有着重要的影响.随着温度的升高,围压为10和30 MPa时的弹性模量逐渐升高,至70℃左右时达到最高,之后随温度的升高略微降低;裂纹损伤应力呈线性显著降低,而泊松比呈线性明显升高.稳态蠕变阶段的应变速率随着温度的升高而明显加速,在同一应力比下到达破坏的时间相应降低.随着恒载应力的降低,似斑状二长花岗岩达到破坏的时间显著增长.随着围压的增加,轴向蠕变变形量明显增加;在相同的应力比下,导致岩石断裂破坏的时间显著延长.
英文摘要	Physico-mechanical property is one of the important aspects for site selection,design,construction and performance assessment of high-level radioactive waste(HLW) disposal.Through a nationwide screening and comparison,Beishan area,a Gobi desert in Gansu Province,is considered as a suitable candidate for HLW geological repository in China.The dominant lithology in Beishan area is porphyritic monzonitic granite and tonalite,with high homogeneity.The deep intact rock of Beishan area has the properties of high density,low porosity,high mechanical strength,low strain and high brittleness.The strain and acoustic emission behavior of granite under constant loading with different temperatures(room temperature,50 ℃,90 ℃) and confining pressures(0,10 and 30 MPa) are studied through creep test.The results indicate that the effect of temperatures and confining pressure on the mechanical property is significant.When the confining pressure is 10 and 30 MPa respectively,the elastic modulus increases with temperature increasing to about 70 ℃,and then decreases a little with the temperature increasing higher;the crack damage stress linearly decreases and Poisson′s ratio linearly increases separately with the temperature increases.The steady state creep strain rate increases and the time to failure response at the same stress ratio reduces with the temperature increasing.The time to failure increases rapidly as the constant load decreases. The axial creep strain increases and time to failure of granite at the same stress ratio increases rapidly when confining pressure increases.
中文关键词	高放废物 ; 深地质处置 ; 花岗岩 ; 物理力学性能 ; 时温效应
英文关键词	high-level radioactive waste(HLW) deep geological disposal granite physico-mechanical properties time-temperature effect
语种	中文
国家	中国
收录类别	CSCD
WOS类目	NUCLEAR SCIENCE TECHNOLOGY
WOS研究方向	Nuclear Science & Technology
CSCD记录号	CSCD:2937939
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/221647
作者单位	1.北京科技大学,土木与环境工程学院, 北京 100083, 中国; 2.核工业北京地质研究院, 北京 100029, 中国; 3.香港大学,土木工程系, 香港
推荐引用方式 GB/T 7714	刘月妙,王驹,谭国焕,等. 高放废物处置北山预选区深部完整岩石基本物理力学性能及时温效应[J],2007,26(10):2034-2042.
APA	刘月妙,王驹,谭国焕,&蔡美峰.(2007).高放废物处置北山预选区深部完整岩石基本物理力学性能及时温效应.,26(10),2034-2042.
MLA	刘月妙,et al."高放废物处置北山预选区深部完整岩石基本物理力学性能及时温效应".26.10(2007):2034-2042.