Volume 24 Issue 3
Jun.  2016
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TANG Hongmei, ZHANG Jinhao, CHEN Hongkai. 2016: LABORATORY TESTS ON FAILURE MECHANISM OF FRACTURED ROCK UNDER COMPRESSION. JOURNAL OF ENGINEERING GEOLOGY, 24(3): 363-368. doi: 10.13544/j.cnki.jeg.2016.03.004
Citation: TANG Hongmei, ZHANG Jinhao, CHEN Hongkai. 2016: LABORATORY TESTS ON FAILURE MECHANISM OF FRACTURED ROCK UNDER COMPRESSION. JOURNAL OF ENGINEERING GEOLOGY, 24(3): 363-368. doi: 10.13544/j.cnki.jeg.2016.03.004

LABORATORY TESTS ON FAILURE MECHANISM OF FRACTURED ROCK UNDER COMPRESSION

doi: 10.13544/j.cnki.jeg.2016.03.004
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  • Received Date: 2015-04-18
  • Rev Recd Date: 2015-11-09
  • Publish Date: 2016-06-25
  • The crack propagation and strength of fissured rocks under applying loads are significant for the study of rock deformation mechanism. Mortar fractured specimens have been simulated as fissured rock in the uniaxial compression experiment. Different crack length, the initial propagation angle of specimens and initial crack strength have been obtained by setting 9 experimental conditions. They have 3angles of 45, 60 and 75 and 3 crack length of 45mm, 60mm and 75mm. The compression failure mechanism is also analyzed. The results show the following. When the crack length is the same, the initial crack strength is increased by the increase of angles. When the angle is increased from 60to 75,the initial crack strength is increased faster. When the crack angle stays at a certain level, the initial crack strength is decreased by the increase of the crack length. By employing the theory of maximum circumferential stress, the failure mechanism of fractured specimens under compression is interpreted. Theoretical expression of crack propagation angle is acquired. By comparison, it is found that the measured and theoretical values of crack propagation angle are in good agreement.
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  • Bobet A,Einstein H H. 1998. Fracture coalescence in rock-type materia1s under uniaxial and biaxial compression[J]. International Journal of Rock Mechanis and Mining Sciences,35(7):863~888.

    Lajtai E Z. 1974. Brittle fracture in compression[J]. International Journal of Fracture,10(4):525~536.

    Guo B H,Li X J,Su C D. 2012. Experimental study of constitutive relation for rock fracture under normal cyclic loading[J]. Chine Journal of Rock Mechanics and Engineering,31(S1):2973~2980.

    Liu C J,Ding L Q,Ning B H,et al. 2012. Meshless simulation of seepage field and seepage characteristics for fractured rock[J]. Journal of Engineering Geology,20(4):570~575.

    Lu Y N,Li X P,Wu X H. 2014. Fracture coalescence mechanism of single flaw rock specimen due to freeze-thaw under triaxial compression[J]. Rock and Soil Mechanics,35(6):1579~1584.

    Li Y P,Wang Z Y. 1995. Numerical simulation of the crack extension process in rock masses[J]. Journal of Engineering Geology,3(4):48~53.

    Pu C Z,Cao P,Zhao Y L,et al. 2010. Numerical analysis and strength experiment of rock-like materials with multi-fissures under uniaxial compression[J]. Rock and Soil Mechanics,31(11):3661~3666.

    Rao Q,Stillborg B,Sun Z Q,et al. 1999. Mode Ⅱ fracture toughness testing of rock[C]. Paris:Int Congress on Rock Mechanics.

    Wang G Y,Yu G M,Song C W. 2011. Influence of initial crack geometrical properties on rock crack propagation[J]. Journal of Liaoning Technical University(Natural Science),30(5):681~684.

    Xiao T L,Li X P,Guo Y H. 2012. Experimental study of failure characteristic of single jointed rock mass under triaxial compression tests[J]. Rock and Soil Mechanics,33(11):3251~3256.

    Yang S Q. 2013. Study of strength failure and crack coalescence behavior of sandstone containing three pre-existing fissures[J]. Rock and Soil Mechanics,34(1):31~39.

    Zhang G. 2004. Experimental study on the permeability regularities of rock cracks under triaxial compression[J]. Journal of Engineering Geology,12(1):30~33.

    郭保华,李小军,苏承东. 2012. 岩石裂隙法向循环加载本构关系试验研究[J]. 岩石力学与工程学报,31(增1):2973~2980.

    刘昌军,丁留谦,宁保辉,等. 2012. 裂隙岩体渗流场的无单元法模拟及渗流特性研究[J]. 工程地质学报,20(4):570~575.

    路亚妮,李新平,吴兴宏. 2014. 三轴压缩条件下冻融单裂隙岩样裂缝贯通机制[J]. 岩土力学,35(6):1579~1584.

    李云鹏,王芝银. 1995. 岩体裂隙扩展过程的数值模拟[J]. 工程地质学报,3(4):48~53.

    蒲成志,曹平,赵延林,等. 2010. 单轴压缩下多裂隙类岩石材料强度实验与数值分析[J]. 岩土力学,31(11):3661~3666.

    王国艳,于广明,宋传旺. 2011. 初始裂隙几何要素对岩石裂隙扩展演化的影响[J]. 辽宁工程技术大学学报(自然科学版),30(5):681~684.

    肖桃李,李新平,郭运华. 2012. 三轴压缩条件下单裂隙岩石的破坏特征研究[J]. 岩土力学,33(11):3251~3256.

    杨圣奇. 2013. 断续三裂隙砂岩强度破坏和裂纹扩展特征研究[J]. 岩土力学,34(1):31~39.

    郑刚. 2004. 岩体裂隙三轴应力渗流规律的实验研究[J]. 工程地质学报,12(1):30~33.
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