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力学与实践 ›› 2008, Vol. 30 ›› Issue (2): 70-73.doi: 10.6052/1000-0992-2007-227

• 应用研究 • 上一篇    下一篇

岩石破裂电磁辐射幅值与岩石属性参数的关系

万国香   

  1. 中南大学,资源与完全工程学院
  • 收稿日期:2007-05-23 修回日期:2007-11-09 出版日期:2008-04-08 发布日期:2008-04-08

THE RELATIONSHIP BETWEEN THE ELECTROMAGNETIC RADIATION(EMR) AND ROCKMASSES PARAMETERS DURING ROCK FAILURE

WAN Guo-Xiang   

  • Received:2007-05-23 Revised:2007-11-09 Online:2008-04-08 Published:2008-04-08

摘要: 基于岩石破裂电磁辐射是由岩石破裂时传播裂纹引起原子扰动产生的假说, 通过断裂力学理论计算了岩石破裂时的裂纹扩展长度及裂纹面积. 由电磁辐射幅值与裂纹长度 及裂纹面积之间的关系,给出了电磁辐射幅值与岩石属性参数之间的关系表达式. 讨论了主 要的不同属性参数对电磁辐射幅值的影响. 发现电磁辐射幅值随岩石弹性模量增大而增大;岩石破 裂的电磁辐射与岩石的尺寸有关,且岩石尺寸因素影响大于岩性因素影响. 本文的研究结果与现有的 实验结果是吻合的.

关键词: 岩石破裂, 裂纹, 电磁辐射, 幅值

Abstract: Based on the hypothesis of the EMR created by atom perturbation resulting from propagating cracks during rock fracture, the crack length and area are calculated through fracture mechanics under small yield condition. The expression of the EMR amplitude and rock's attribute parameters is presented according to the relation between EMR amplitude and crack length and area. The dependence of the EMR amplitude on each attribute parameter is discussed. The obtained results show that the EMR amplitude increases with the elastic modulus and the influence of rock dimension on the EMR is greater than its lithology. The results of this paper are in good agreement with many experimental measurements.

Key words: rock fracture, crack, EMR, amplitude