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Volume 39 Issue 2
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ZHU Di-jie, CHEN Zhong-hui, XI Jing-yi, YANG Deng-feng. Interaction between offset parallel cracks in rock[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(2): 235-243. DOI: 10.11779/CJGE201702006
Citation: ZHU Di-jie, CHEN Zhong-hui, XI Jing-yi, YANG Deng-feng. Interaction between offset parallel cracks in rock[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(2): 235-243. DOI: 10.11779/CJGE201702006
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Interaction between offset parallel cracks in rock

  • 1. School of Mechanics and Civil Engineering, China University of Mining & Technology, Beijing 100083, China;
    2. China Building Technique Group Company, Beijing 100013, China

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  • Received Date: December 02, 2015
  • Published Date: March 24, 2017
    Graphical Abstract
    • Abstract
  • The interaction of cracks with different locations and sizes is a key factor leading to the damage of rock. Based on the Kachanov method, the interaction rules between two offset parallel cracks with different level intervals, vertical intervals, crack lengths and crack angles are investigated by analyzing the stress intensity factor ratios under tension-shear stress and compression-shear stress. The compression tests on rock-like specimens with two unequal offset parallel cracks are performed, and the theoretical analysis is proved through the researches on the crack initiation and initial stress variation rules. The results shows that the offset parallel cracks exist reinforcing effect, shielding effect and null effect, and the three effects transform mutually along with the variations of level intervals, vertical intervals, crack lengths and angles. The reinforcing effect and shielding effect become more and more severe with the decrease of distance to the crack tip, and KI changes greatly when the crack angle is 60°and KII changes greatly when the crack angle is 30°.
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    • References (17)
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