冲击地压震源机理研究  

Research on Epicentre Mechanisms of Rock Burst

作　　者：闫永敢[1] 朱涛[1] 张百胜[1] 康立勋[1] 

机构地区：[1]太原理工大学矿业工程学院,太原030024

出　　处：《太原理工大学学报》2010年第3期227-230,共4页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金(50704024);山西青年科技研究基金(207021047)

摘　　要：为了进一步理解冲击地压发生的机理,解释冲击地压发生的过程,本文在论述了冲击地压发生的刚度理论、能量理论和失稳理论的统一性的基础上,提出了冲击地压的震源机理,认为冲击地压是一个动力学过程,它包括冲击地压震源的形成,冲击地压应力波的形成及传播和在应力波作用下自由面处岩体的破坏及冲出三个子过程,冲击地压发生所需能量由震源提供,而冲击地压的破坏作用是应力波造成的。利用震源机理分析了冲击地压的发生过程,揭示了震源形成的规律,推导出了应力波最大应力峰值的计算公式,给出了应力波传播衰减规律,解释了应力波在自由面处对煤体的破坏作用。In order to understand mechanism of rockburst and explain the process of rockburst occurrence, the unity of rigidity theory, energy theory and instability theory of rock burst was discussed. Then seismic source theory of the rock burst was put forward, which considers rock burst as a dynamic process composed of three sub-processes： the formation of the seismic source, the formation and transmission of stress waves and the failure and burst of coal mass near the free face under the effect of stress waves. Occurrence process of rockburst was analyzed according to epicenter mechanism. Calculation formula of the maximum stress peak of stress waves was deduced. Stress wave propagating decay law was presented. Breakage action of stress waves on coal mass near free surface was explained.

关 键 词：冲击地压 震源机理 发生过程 应力波 

分 类 号：TD324.1[矿业工程—矿井建设]