中文摘要：

应用爆轰理论、爆炸力学和爆轰物理学等基本理论和方法，建立了掘进巷道瓦斯爆轰的物理模型和一维不定常流动的数学关系式．目的在于利用瓦斯爆轰的波强度变化方程研究掘进巷道瓦斯爆轰的衰减规律．通过推导认为平面爆轰渡衰减迹线有渐近线，但却不能在有限距离内转变为C-J爆轰状态，而柱面和球面散心强爆轰波却可以在某个有限距离内衰减到C-J状态，文中推导了这个有限距离．另外，掘进巷道瓦斯爆轰波传播过程中，可以根据已知波前状态参数推导出能表征爆轰衰减规律的超压表达式，同时利用Hugoniot曲线对超压的衰减进行了描述，图2，参9．

英文摘要：

Using the detonation theory, detonation physics and explosion mechanics, the physical model and the mathematical, unsteady one-dimension flow expressions are set up in excavation roadway during gas detonation. The wave intensity change equations are applied with the purpose of studying the detonation attenuation. Though the asymptote is derived from the attenuation path line of the plane detonation wave, the cylindrical and spherical detonation wave can be attenuated to the state of C-J, and the limitd distance is deduced. The overpressure expression characterizing the gas detonation attenuation is inferred during detonation wave propagation in excavation roadway. Moreover, the overpressure attenuation is expressed in the Hugoniot curve of overpressure arid specific volume. 2figs., 9refs.