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高空隙率、低透气性使构造煤能够保持较高的瓦斯压力 ;破碎性、“隔离”作用及“气垫”作用 ,使构造煤抵御外力作用的能力大大降低 ;构造煤变形幅度大的特性 ,为瓦斯的迅速解吸、放散和快速流动创造了条件 ;构造煤薄弱分层或“通道层”的存在 ,则为煤与瓦斯突出的初始激发和持续发展奠定了基础 ;上述因素的共同作用 ,影响和制约了煤与瓦斯突出的强度和分布 .尽管如此 ,一定厚度的构造煤的存在只是发生煤与瓦斯突出的必要条件和有利条件 ,而非充分条件 .
High porosity and low permeability make tectonic coal maintain high gas pressure. Crushing, “isolation” effect and “air cushion” effect can greatly reduce the ability of tectonic coal to resist external force. With large deformation range of tectonic coal, Which has created the conditions for the rapid desorption, dissipation and rapid flow of gas. The existence of weak stratification or “channel layer” of tectonic coal laid the foundation for the initial excitation and sustainable development of coal and gas outburst. The above mentioned factors have the combined effect and influence And restricted the strength and distribution of coal and gas outburst.However, the existence of a certain thickness of structural coal is only the necessary conditions and favorable conditions for the occurrence of coal and gas outburst, not the sufficient conditions.