【摘要】 从理论和数值模拟两方面分析了煤矿井下断层的力学特征,给出构造应力场的微观解释,并根据断层形成的力学模型描述了主应力轴与剪断面的相互关系。在理论分析的基础上运用数值模拟软件FLAC3D分别建立不同角度的断层,并对断层面附近应力场进行了模拟,得到断层端部应力集中程度、断层中部应力、原岩应力、断层倾角等因素的相互关系。对理论分析和模拟结果进行了对比,并根据煤与瓦斯突出综合假说,结合贵州某矿实例分析了断层附近突出高发的原因和应对策略。更多还原

【Abstract】 In this paper,theoretical and numerical simulation analysis was carried out on the mechanical characteristics of faults in coal mines,the microscopic explanation of the tectonic stress field was given,and the interrelation between the principal stress axis and the shearing plane was described according to mechanical model of faults.On the basis of theoretical analysis,the faults at different angles were established by using the numerical simulation software FLAC 3D,the stress field near the fault plane was simulated,and finally,the relation among the end stress of fault,the middle stress of fault,the stress of the original rock,the dip angle of fault and so on.The theoretical analysis was contrasted with the simulated results,and analysis on the cause of outburst occurrence near the fault was made according to the comprehensive hypothesis of coal and gas outburst and the outburst examples in a certain mine in Guizhou Province.更多还原