饱水与晶体粒度对北山花岗岩断裂韧度影响的试验研究

doi:10.13722/j.cnki.jrme.2016.1248

摘要
图/表
参考文献(26)
相关文章 (15)

全文: PDF (1859 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要

采用MTS815岩石力学试验机和三维声发射监测系统，选取高放废物处置甘肃北山预选区5种典型岩石，开展不同粒径花岗岩干燥与饱水状态下的三点弯曲试验，探讨饱水和晶体粒径对岩石断裂韧度的影响规律。通过对比干燥与饱水试样循环加、卸载曲线发现，饱水处理会明显降低试样在张拉条件下的起裂强度和劈裂韧度，并加速裂纹扩展速度。试验结果表明，干燥北山花岗岩断裂韧度介于1 576～2 139 N/cm^1.5，饱水试样介于1 463～1 848 N/cm^1.5范围。同一粒径下，饱水试样断裂韧度均值均约为干燥试样的90%。通过不同类型试样试验结果对比，发现北山花岗岩断裂韧度有随晶体粒径增大而减小的趋势，而岩石本身矿物成分与晶粒形态对试样的断裂韧度也有一定影响。最后，基于三维声发射监测数据，分析试验过程中裂纹扩展过程，深化对岩石断裂损伤演化机制的认识。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	李莹1
	陈亮1
	刘建锋2
	刘健1
	王春萍1
	王驹1

关键词 ：岩石力学, 北山花岗岩, 断裂韧度, 饱和, 粒径, 声发射

Abstract：

The fracture toughness(K_IC) of five typical granites taken from the Beishan candidate area for geological disposal of high-level radioactive waste was investigated through three-point bending test，with the purpose to study the influence of saturation process and grain size on K_IC of granite. By comparing the curves of dry and saturated granite under cyclic loading and unloading condition，it is indicated that the saturation process can result in a significant degradation of initial cracking strength and fracture toughness，and accelerate the crack propagation speed in post-peak phase. Experimental data show that K_IC of dry and saturated samples are 1 576– 2 139 N/cm^1.⁵ and 1 463–1 848 N/cm^1.5，respectively，and mean values of K_IC of saturated granite are about 90% of dry ones in the same group. Meanwhile，it is noticed that K_IC of Beishan granite decreases remarkably with the increase of average particle size，rock mineral composition and particle forms also have certain influence on the variation of K_IC. At last，the fracture propagation process were analyzed with the recorded AE events.

Key words： rock mechanics Beishan granite fracture toughness saturation grain size Acoustic emission

引用本文:

李莹1，陈亮1，刘建锋2，刘健1，王春萍1，王驹1. 饱水与晶体粒度对北山花岗岩断裂韧度影响的试验研究[J]. 岩石力学与工程学报, 2018, 37(S1): 3169-3177.
LI Ying1，CHEN Liang1，LIU Jianfeng2，LIU Jian1，WANG Chunping1，WANG Ju1. Experimental study on influence of saturation process and grain size on the fracture toughness of the Beishan granite. , 2018, 37(S1): 3169-3177.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2016.1248 或 https://rockmech.whrsm.ac.cn/CN/Y2018/V37/IS1/3169

[1]	国家发展和改革委员会. 核电中长期发展规划(2005～2020年)[R].北京：[s. n.]，2007.(State Development and Reform Commission. Mid-long term development plan for nuclear power(between 2005 and 2020)[R]. Beijing：[s. n.]，2007.(in Chinese))
[2]	王驹，范显华，徐国庆，等. 中国高放废物地质处置十年进展[M]. 北京：原子能出版社，2004：1-12.(WANGJu，FAN Xianhua，XU Guoqing，et al. Geological disposal of high-level radioactive waste in China progress in last decade[M]. Beijing：Atomic Energy Press，2004： 1-12.(in Chinese))
[3]	WANG J. High-level radioactive waste disposal in China：update2010[J]. Journal of Rock Mechanics and Geotechnical Engineering，2010，2(1)：1-11.
[4]	International Atomic Energy Agency. Scientific and technical basis for the geological disposal of radioactive waste[R]. Vienna：Technical Reports Series，International Atomic Energy Agency，2003.
[5]	Swedish Nuclear Fuel and Waste Management Company. Deep Repository for spent Nuclear Fuel SR 97-Post-closure Safety[R]. Sweden：Main Report Summary，Technical Report TR-99-06，1999.
[6]	王驹，陈伟明，苏锐，等.高放废物地质处置及其若干关键科学问题[J]. 岩石力学与工程学报，2006，25(4)：801-812.(WANG Ju，CHENG Weiming，SU Rui，et al. High level radioactive waste disposal and certain of its several key issues[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(4)：801-812.(in Chinese))
[7]	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]. 岩石力学与工程学报，2007，26(10)：2 034-2 042.(LIU Yuemiao，WANG Ju，THAM L G，et al. Basic physico-mechanical properties and time-temperature effectof deep intact rock from Beishan preselected area for high-levelradioactive waste disposal[J]. Chinese Journal of Rock Mechanics and
	Engineering，2007，26(10)：2 034-2 042.(in Chinese))
[8]	潘自强，钱七虎. 高放废物地质处置战略研究[M]. 北京：原子能出版社，2009：37-39.(PAN Ziqiang，QIAN Qihu. Strategic research for deep geological disposal of high level radioactive waste[M].Beijing：Atomic Energy Press，2009：37-39.(in Chinese))
[9]	International Atomic Energy Agency.Scientific and technical basis for the geological disposal of radioactive waste[R]. Vienna：Technical Reports Series，International Atomic Energy Agency，2003.
[10]	贾学明，王启智. 标定ISRM岩石断裂韧度新型试样CCNBD的应力强度因子[J]．岩石力学与工程学报，2003，22(8)：1227-1233.(JIA Xueming，WANG Qizhi. Calibration of stress intensity factor for new type of fracture toughness specimensuggested by ISRM[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(8)：1227-1233.(in Chinese))
[11]	谢和平，陈忠辉. 岩石力学[M]. 北京：科学出版社，2004：136-152.(XIE Heping，CHEN Zhonghui. Rock mechanics[M]. Beijing：Science Press，2004：136-152.(in Chinese))
[12]	崔振东，刘大安，安光明，等.岩石I型断裂韧度测试方法研究进展[J].测试技术学报，2009，23(3)：189-196.(CUI Zhendong，LIU Daan，AN Guangming，et al. Research Progress in Mode-I fracture toughness testing methods for rocks[J]. Journal of Test and Measurement Technology，2009，23(3)：189-196.(in Chinese))
[13]	WANG QZ. Stress intensity factor of ISRM suggested CCNBD specimen used for mode-I fracture toughness determining[J]. InternationalJournal of Rock Mechanics and Mining Sciences，1998，35(7)：977-982.
[14]	孙宗颀，饶秋华，王桂尧. 岩石剪切断裂韧度(KIC)确定的研究[J]. 岩石力学与工程学报，2002，21(2)：199-203.(SUN Zhongqi，RAO Qiuhua，WANG Guiyao. Determination for rock shear fracture toughness(KIC)[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(2)：199-203.(in Chinese))
[15]	尹祥础，颜玉定，李红.不同方法测定岩石断裂韧度KIC的研究[J].岩石力学与工程学报，1990，9(4)：328-333.(YIN Xiangchu，YAN Yuding，LI Hong. Research for determining the fracture toughness (KIC) of rock by using different methods[J]. Chinese Journal of Rock Mechanics and Engineering，1990，9(4)：328-333.(in Chinese))
[16]	张盛，王启智. 用5 种圆盘试件的劈裂试验确定岩石断裂韧度[J].岩土力学，2009，3(1)：12-18.(ZHANG Sheng，WANG Qizhi. Determination of rock fracture toughness by split test using five types of disc specimens[J]. Rock and Soil Mechanics，2009，3(1)：12-18. (in Chinese))
[17]	王启智，鲜学福.岩石三点弯曲圆梁断裂韧度KIC的测试研究[J].重庆大学学报：自然科学版，1992，15(5)：101-106.(WANG Qizhi，XIAN Xuefu. An investigation for testing rock fracture toughness with three-point bend round bar[J]. Journal of Chongqing University：Natural Science Edition，1992，15(5)：101-106.(in Chinese))
[18]	SHAO JF，CHAU K T，FENG XT. Modeling of anisotropic damage and creep deformation in brittle rocks[J]. International Journal of RockMechanics and Mining Sciences，2006，43(4)：582-592.
[19]	SHAO JF，HOXHA D，BART M，et al. Modelling of induced anisotropic damage in granites[J]. International Journal of Rock Mechanics and Mining Sciences，1999，36(8)：1 001-1 012.
[20]	YOSHITAKA N，KAZUYA M，NAOKI H，et al. Influence of relative humidity on fracture toughness of rock：Implicationsfor subcritical crack growth[J]. International Journal of Solids and Structures，2012，49(18)：2471-2481.
[21]	MEREDITH P G，ATKINSON B K. Fracture toughness and subcritical crack growth duringhigh-temperature tensile deformation of Westerly granite andBlack gabbro[J]. Physics of the Earth and Planetary Interiors，1985，39(1)：33-51.
[22]	NASSERI M H B，SCHUBNEL A，YOUNG R P，et al. Coupled evolutions of fracture toughness and elastic wave velocities at high crack density in thermally treated Westerly granite[J]. International Journal of Rock Mechanics and Mining Sciences，2007，44(4)：601-616.
[23]	左建平，周宏伟. 三点弯曲下热处理北山花岗岩的断裂特性研究[J]. 岩石力学与工程学报，2013，32(12)：2 423-2430.(ZUO Jianping，ZHOU Hongwei. Research on fracture behavior of Beishan granite after heat treatment under three-point bending[J]. Chinese Journal of Rock Mechanics and Engineering，2013，31(12)：2423-2430.(in Chinese))
[24]	ISRM Testing Commission．Suggested methods for determining the fracture toughness of rock[J]. Mining Sciences，1988，25：76-77.
[25]	CHENG L，LIU JF，WANG CP，et al.Characterizing of damage evolution in granite under compressive stress condition and its effect on permeability[J].International Journal of Rock Mechanics and Mining Sciences，2014，71(10)：340-349.
[26]	左建平，周宏伟，谢和平. 不同温度影响下砂岩的断裂特性研究[J] .工程力学，2008，25(5)：124-130.(ZUO Jianping，ZHOU Hongwei，XIE Heping. Fracture characteristics of sandstone under thermal effects[J]. Engineering Mechanics，2008，25(5)：124-130.(in Chinese))