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动静载荷下巷道围岩裂纹扩展规律的试验研究

郭东明 闫鹏洋 薛磊 罗浪 杨俊

郭东明, 闫鹏洋, 薛磊, 罗浪, 杨俊. 动静载荷下巷道围岩裂纹扩展规律的试验研究[J]. 矿业科学学报, 2016, 1(2): 146-154.
引用本文: 郭东明, 闫鹏洋, 薛磊, 罗浪, 杨俊. 动静载荷下巷道围岩裂纹扩展规律的试验研究[J]. 矿业科学学报, 2016, 1(2): 146-154.
Guo Dongming, Yan Pengyang, Xue Lei, Luo Lang, Yang Jun. The experimental research on the propagation laws of cracks in roadway surrounding rock subjected to static-dynamic load[J]. Journal of Mining Science and Technology, 2016, 1(2): 146-154.
Citation: Guo Dongming, Yan Pengyang, Xue Lei, Luo Lang, Yang Jun. The experimental research on the propagation laws of cracks in roadway surrounding rock subjected to static-dynamic load[J]. Journal of Mining Science and Technology, 2016, 1(2): 146-154.

动静载荷下巷道围岩裂纹扩展规律的试验研究

基金项目: 国家自然科学基金项目(51274204,51134025)
教育部新世纪优秀人才支持计划(NCET-12-0965)
详细信息
    作者简介:

    郭东明(1974—),男,江西新余人,教授,博士,主要从事矿井建设方面的教学和研究工作。

  • 中图分类号: TD235

The experimental research on the propagation laws of cracks in roadway surrounding rock subjected to static-dynamic load

  • 摘要: 为了研究动静载荷耦合作用下巷道围岩裂纹的扩展规律,将PMMA材料加工成含有单裂纹的试件,利用爆炸加载动态焦散线测试系统进行了巷道围岩裂纹扩展规律的试验.研究表明,预制裂纹的扩展位移、试件损伤度以及试验围压之间存在密切联系:扩展位移与试件损伤度呈负相关的关系;损伤度随围压的增大呈现先增大后减小的变化规律;不同围压条件下,预制裂纹在等量爆炸载荷作用下均出现扩展和止裂交替变化的现象,但预制裂纹扩展位移随着围压的增大呈先减小后增大的变化规律,在0MPa围压下扩展位移有最大值30.84mm,在0.4MPa时扩展位移有最小值10.98mm.裂纹端部扩展速度与能量释放率关系较为密切:能量释放率增大时,扩展速度会相应增大;预制裂纹扩展速度减小后,受应力波影响,裂纹端部积累能量,能量释放率又会相应增大.
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  • 收稿日期:  2016-05-09
  • 刊出日期:  2016-10-29

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