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煤岩的失稳是煤与瓦斯突出发生的先决条件。以理论分析和数值模拟为主要手段,分析了石门和煤巷掘进工作面煤岩体失稳前后应力和瓦斯的动态变化,研究了应力和瓦斯对煤岩体失稳的作用和影响,建立了煤岩体卸围压破坏过程中应力变化的动态分析模型,分析了破坏过程中升压和降压2个不同的阶段,解释了动态扰动下煤岩易于发生失稳的原因和机制,并提出了掘进工作面煤岩失稳的能量判据。以上研究对进一步揭示煤与瓦斯突出的发生机理和突出的探测预防具有一定的指导作用。
Coal and rock instability is a prerequisite for coal and gas outburst. With the theoretical analysis and numerical simulation as the main measures, the dynamic changes of stress and gas before and after the coal and rock mass in Shimen and coal roadway are analyzed. The effect and influence of stress and gas on the instability of coal and rock mass are studied. The dynamic analysis model of stress changes in the process of unloading confining pressure of coal and rock mass is analyzed. Two different stages of pressure rise and pressure reduction in the process of failure are analyzed. The reason and mechanism of coal rock prone to destabilization under dynamic disturbance are explained. Energy Criterion of Coal and Rock Instability in Driving Face. The above research has certain guidance to further reveal the occurrence mechanism of coal and gas outburst and outstanding exploration and prevention.