瓦斯膨胀能与瓦斯压力及瓦斯放散初速度的相互关系

选取2个煤矿,分别在不同标高测定煤层瓦斯压力,在实验室对各点煤样进行初始释放瓦斯膨胀能和瓦斯放散初速度测定。通过观察发现,初始释放瓦斯膨胀能与煤层瓦斯压力及瓦斯放散初速度之间存在近似的线性关系,用多元线性回归来构造三者关系模型,得出三者关系曲线。在考虑瓦斯放散初速度为常数时,根据关系曲线可以得到石门揭煤前的安全瓦斯压力,为防止煤与瓦斯突出提供一种简单方便的方法。

Relationship Among Gas Expansion Energy and Gas Pressure and Initial Speed of Methane Diffusion

Selecting two mines and measuring coal seam gas pressure at different elevation,expansion energy in initial released gas and initial speed of methane diffusion of each point sample are tested in laboratory.It is found that there is a linear relationship among expansion energy in initial released gas and gas pressure and initial speed of methane diffusion,and the curve among them is achieved by using multiple linear regression to make the model of triadic relation.Considering initial speed of methane diffusion as constant,the safety gas pressure before rock cross-cut coal uncovering is achieved according to the curve,which provides a simple method for preventing coal and gas outburst.