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| EXPERIMENTAL STUDY OF COLUMNAR JOINTED SANDSTONE-LIKE MATERIAL WITH PRESET FILLING |
| LIU Xinyu1，2，LIU Aihua1，3，LI Xibing1 |
(1. School of Resources and Safety Engineering，Central South University，Changsha，Hunan 410083，China；2. School of Architecture and Civil Engineering，Inner Mongolia University of Science and Technology，Baotou，Inner Mongolia 014010，
China；3. College of Water Conservancy and Civil Engineering，South China Agricultural University，
Guangzhou，Guangdong 510642，China) |
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Abstract The model tests using the rock similar materials were carried out to study the effect of height-diameter ratios and characteristics of the filled joints. The uniaxial compression and shear tests were performed with three types of specimens including ones without joints，ones with cruciform joints and ones with intersecting parallels joints. The failure modes of the three types of specimens are similar in general trends with X-shaped conjugated plane or single plane of shear failure under compression and shear tests. Under the uniaxial compression，the performance of intact specimen is clearly affected by its size，and the strength of jointed one is significantly affected by the weakening of the structure depending on the joint density and the filling materials. The elastic modulus E and the cohesion c have no significant difference for the two kinds of jointed specimens，while the internal friction angles are obviously affected by the joints and their fillings.
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Received: 28 June 2013
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| [1] 刘爱华，李夕兵. 岩体弱面延展性的概率估算及其应用[J]. 岩石力学与工程学报，1997，16(4)：375–379.(LIU Aihua，LI Xibing. Statistical probability method for the extension of a discontinuous surface in rock mass and its applications[J]. Chinese Journal of Rock Mechanics and Engineering，1997，16(4)：375–379.(in Chinese))
[2] BROWN E T. Strength of models of rock with intermittent joints[J]. Journal of the Soil Mechanics and Foundation Division，1970，96(6)：1 935–1 949.
[3] 任伟中，白世伟，丰定祥. 平面应力条件下闭合断续节理岩体力学特性试验研究[J]. 实验力学，1999，14(4)：521–527.(REN Weizhong，BAI Shiwei，FENG Dingxiang. An experimental study on the mechanical characteristics of rock mass containing close intermittent joints under plane stress condition[J]. Journal of Experimental Mechanics，1999，14(4)：521–527.(in Chinese))
[4] REYES O，EINSTEIN H H. Failure mechanics of fractured rock—a fracture coalescence mode[C]// Proceedings of the 7th International Congress of Rock Mechanics. [S.l.]：[s.n.]，1991：333–340.
[5] 朱维申，陈卫忠，申 晋. 雁形裂纹扩展的模型试验及断裂力学机制研究[J]. 固体力学学报，1998，19(4)：355–360.(ZHU Weishen，CHEN Weizhong，SHEN Jin. Simulation experiment and fracture mechanism study on propagation of echelon pattern cracks[J]. Acta Mechanica Solida Sinica，1998，19(4)：355–360.(in Chinese))
[6] EINSTEIN H H，NELSON R A，BRUHN R W，et al. Model studies of jointed-rock behavior(abstract)[C]// Proceedings of the 11th Symp. on Rock Mechanics. [S.l.]：[s.n.]，1969：83–103.
[7] SAGONG M，BOBET A. Coalescence of multiple flaws in a rock-model material in uniaxial compression[J]. International Journal of Rock Mechanics and Mining Sciences，2002，39(2)：229–241.
[8] 车法星，黎立云，刘大安. 类岩材料多裂纹体断裂破坏试验及有限元分析[J]. 岩石力学与工程学报，2000，19(3)：295–298.(CHE Faxing，LI Liyun，LIU Da?an. Fracture experiments and finite element analysis for multi-cracks body of rock-like material[J]. Chinese Journal of Rock Mechanics and Engineering，2000，19(3)：295–298. (in Chinese))
[9] 刘爱华，罗荣武，黎 鸿，等. 人工非贯通节理试样力学强度特征试验研究[J]. 西安科技大学学报，2009，29(6)：726–730.(LIU Aihua，LUO Rongwu，LI Hong，et al. Strength features of testing samples with prefabricated discontinuous joints[J]. Journal of Xi?an University of Science and Technology，2009，29(6)：726–730.(in Chinese))
[10] 王宝学，杨 同，张 磊. 岩石力学实验指导书(修订版)[M]. 北京：北京科技大学出版社，2008：27–29.(WANG Baoxue，YANG Tong，ZHANG Lei. Rock mechanics experiment instructions(revision)[M]. Beijing：Press of University of Science and Technology Beijing，2008：27–29.(in Chinese))
[11] LI C. A method for graphically presenting the deformation modulus of jointed rock mass[J]. Rock Mechanics and Rock Engineering，2001，34(1)：67–75.
[12] HUANG T H，CHANG C S，YANG Z F. Elastic moduli for fractured rock mass[J]. Rock Mechanics and Rock Engineering，1995，28(3)：135–144.
[13] SINGH M，SINGH B，CHOUDHARI J B，et al. Constitutive equation for 3D anisotropy in jointed rocks and its effect on tunnel closure[J]. International Journal of Rock Mechanics and Mining Sciences，2004，41(Supp.1)：652–657.
[14] 刘宝琛，张家生，杜奇中，等. 岩石抗压强度的尺寸效应[J]. 岩石力学与工程学报，1998，17(6)：611–614.(LIU Baochen，ZHANG Jiasheng，DU Qizhong，et al. A study of size effect for compression strength of rock[J]. Chinese Journal of Rock Mechanics and Engineering，1998，17(6)：611–614.(in Chinese)) |
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2014, Vol. 33 
