煤矿采空区瓦斯流动分布规律分析

Regularity on the distribution of gas moving in gob area of coal mine

近年来,由于煤矿开采深度的增加、煤与瓦斯突出事故的增多,使人们更加重视对瓦斯运动规律的研究。上隅角瓦斯超限现象在我国煤矿众多高瓦斯矿井中普遍存在,是影响矿井持续、稳定和安全生产的重要原因和事故隐患。为了探讨上隅角瓦斯聚积的根本原因,文章依据渗流理论,在分析采空区内瓦斯流态的前提下,通过建立采空区瓦斯渗流和分布的数学模型,定出边界条件,对采空区瓦斯流动分布规律进行了研究,为分析上隅角瓦斯浓度分布和预测上隅角瓦斯浓度提供了理论依据,对上隅角瓦斯的防治和煤与瓦斯突出预测具有实际意义。

Study on the regularity of gas moving has been emphasized in recent years due to the ever increasing of coal and gas outburst accidents.Gas exceeding the safety limit at the upper corner of the gob area can be found in many mines,not only influencing the sustainability,stability and security of the mines,but also serving as the primary cause of the accidents.In order to discuss the fundamental reason for the accumulation of the gas at the upper corner,based on the seepage theory,the regularity on the distribution of gas moving has been studied by establishing a mathematical model of gas seepage and distribution in the gob area with a given boundary condition.The research has provided theoretical basis for the analysis and forecast of gas concentration distribution at the upper corner of the mines,demonstrating its practical significance in prevention,control and forecast of coal and gas burst.