Mine disasters, as associated problems in the development of coal resources, always threaten the life safety of miners and the production safety of enterprises. In coal roadway excavation, the coal in front of the excavation face is in a state of concentrated stress and the deformation is serious. The instability of the coal seam under stress is an important cause of the occurrence of coal and gas outburst. Thus, knowing the mechanical characteristics of surrounding rock in front of the working face is of great significance for deep understanding and effective prevention and control of coal-rock dynamic disasters. By analyzing the characteristics of stress evolution and deformation and failure in front of the heading face, the analytical solution of plastic region distribution in front of the heading face is obtained. According to the established mechanical model, MATLAB numerical calculation software is used to analyze different examples. The influence of different mechanical parameters on the stress state of the working face is studied. The influence parameters of the morphological characteristics of the plastic region are determined, and the change law and characteristics of the plastic region in front of the working face are studied. At the same time, through the characteristics of stress field, the working face dynamic risk assessment of coal and rock dynamic disaster can be realized, which can provide a powerful guarantee for the prevention and control of gas dynamic disasters in deep mine.

中文翻译：

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基坑围岩力学特性研究

煤矿灾害是煤炭资源开发中的相关问题，一直威胁着矿工的生命安全和企业的生产安全。在煤巷掘进中，掘进工作面前部的煤处于集中应力状态，变形严重。应力作用下煤层的不稳定性是发生煤与瓦斯突出的重要原因。因此，了解工作面前围岩的力学特性，对深入理解和有效防治煤岩动力灾害具有重要意义。通过分析掘进工作面前部应力演化，变形和破坏的特征，得到掘进工作面前部塑性区分布的解析解。根据建立的力学模型，使用MATLAB数值计算软件分析不同的实例。研究了不同机械参数对工作面应力状态的影响。确定了塑性区形态特征的影响参数，研究了工作面前方塑性区的变化规律和特征。同时，通过应力场的特征，可以实现煤岩动态灾害工作面动态风险评估，为深井瓦斯动态灾害的防治提供了有力的保证。研究了不同机械参数对工作面应力状态的影响。确定了塑性区形态特征的影响参数，研究了工作面前方塑性区的变化规律和特征。同时，通过应力场的特征，可以实现煤岩动态灾害工作面动态风险评估，为深井瓦斯动态灾害的防治提供了有力的保证。研究了不同机械参数对工作面应力状态的影响。确定了塑性区形态特征的影响参数，研究了工作面前方塑性区的变化规律和特征。同时，通过应力场的特征，可以实现煤岩动态灾害工作面动态风险评估，为深井瓦斯动态灾害的防治提供了有力的保证。