【摘要】 将巷道简化为圆形,并将掘进迎头视为圆形直立层裂体建立力学模型;导出了层裂体总势能函数的表达式,建立了圆形层裂体的折叠突变模型,得出了瓦斯突出起动的突变条件,并用有限元方法进行了数值模拟。研究表明,层裂体两侧压力差超过临界值将导致瓦斯突出,这对有效防止瓦斯突出具有重要指导意义。更多还原

【Abstract】 The mechanical model of circular layer-crack structure of coal heading face is established with the simplification that the laneway is circular.Based on the expression of total potential energy function,a fold catastrophe model of circular layer-crack structure is established;the sudden change condition of gas outburst is given.The research results indicate that the coal and gas outburst will happen if pressure drop of the two sides of plate is larger than critical value.This research result is useful for gas outburst prevention.更多还原