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岩石试件中非平行双裂纹扩展贯通规律的数值模拟研究

任张瑜 潘卫东 刘世民 周顺

任张瑜, 潘卫东, 刘世民, 周顺. 岩石试件中非平行双裂纹扩展贯通规律的数值模拟研究[J]. 矿业科学学报, 2017, 2(1): 33-41.
引用本文: 任张瑜, 潘卫东, 刘世民, 周顺. 岩石试件中非平行双裂纹扩展贯通规律的数值模拟研究[J]. 矿业科学学报, 2017, 2(1): 33-41.
Ren Zhangyu, Pan Weidong, Liu Shimin, Zhou Shun. Numerical simulation of non-parallel double crack propagation and coalescence in rock specimen[J]. Journal of Mining Science and Technology, 2017, 2(1): 33-41.
Citation: Ren Zhangyu, Pan Weidong, Liu Shimin, Zhou Shun. Numerical simulation of non-parallel double crack propagation and coalescence in rock specimen[J]. Journal of Mining Science and Technology, 2017, 2(1): 33-41.

岩石试件中非平行双裂纹扩展贯通规律的数值模拟研究

基金项目: 国家自然科学基金煤炭联合基金重点资助(U1361209);国家留学基金青年骨干教师出国研修项目
详细信息
    作者简介:

    任张瑜(1988—),男,河北邯郸人,硕士研究生,主要从事矿山压力与岩层控制等研究工作。13366680153@163.com

    通讯作者:

    潘卫东(1982—),男,辽宁丹东人,副教授,硕士生导师,主要从事采矿工程的教学与科研工作。Tel:13621289083。

  • 中图分类号: TD315

Numerical simulation of non-parallel double crack propagation and coalescence in rock specimen

  • 摘要: 含裂纹岩石试件的裂纹扩展贯通规律的研究是岩石力学与岩土工程重要的研究方向之一。本文采用颗粒离散元数值模拟软件PFC2D,对含有两条非平行裂纹的类岩石材料试件的单轴压缩试验进行数值模拟。通过统计裂纹模式,发现了两种不同于两条平行裂纹间结合的模式,这两种结合模式中的水平裂纹多与原点倾斜裂纹在水平方向有重合。由试件的力学响应可知,当水平裂纹位于相同高度时,水平裂纹在原点裂纹正上方或正下方的试件峰值应力最大,且中心两侧峰值应力呈近似对称分布;裂纹的贯通多发生在试件的轴向应力达到其峰值的前后,且伴随试件应力应变曲线从塑性强化阶段到试件的破坏,微裂纹的数目呈现规律性的变化,裂纹的贯通和微裂纹数目变化都能在一定程度上预测或反映试件的破坏。室内试验验证了数值模拟中不同扩展模式的存在,说明数值模拟研究的可行性。
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出版历程
  • 收稿日期:  2016-06-08
  • 刊出日期:  2017-02-15

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