【摘要】 采用力学-数学方法(数值模拟),从相关关键参数(如煤层瓦斯含量、瓦斯压力、瓦斯放散初速度、煤的坚固性系数等)相互关系的数值分析入手,阐述了覆岩应力不同分布状态下煤岩体本构关系和固-流-应力的耦合作用,确定了采掘工作面推进与瓦斯事故源(高应力区和高煤层瓦斯压力区)的时空关系,从而定量地揭示瓦斯事故发生发展的过程机理,达到煤矿瓦斯事故有效预测控制的目的.更多还原

【Abstract】 In order to forecast and control the gas hazard in coal mine,it was stated that the quantitatively mechanical-mathematical methods(numerical simulation)should be used to describe the currently qualitatively expressed gas outburst mechanism,the constitutive relationship of coal and rock under different mining environments,the solid-fluid-stress coupling effects,the temporal and spatial relationship between advancing of working face and hazard source of gas hazard(high stress and high gas pressure zone),then to determine the suitable decompression techniques by determining some related key parameters(such as gas content,gas pressure,gas emission rate,and the Protodyakonov coefficient of coal).Only in this way,the gas hazard could be effectively forecasted and controlled.更多还原