黄岩汇矿综放面采空区三维抽采条件下氧浓度数值模拟研究

3D numerical simulation of oxygen concentration in goaf at fully mechanized mining face in Huangyanhui Coal Mine

以黄岩汇煤矿15109工作面为研究背景,从高瓦斯矿井抽放条件下综放采空区浮煤自燃的特点出发,对其采空区在高抽巷及瓦斯排放专用巷同时运行条件下的氧浓度分布进行数值模拟研究。通过实验模拟测定煤层自然发火相关特性参数,利用相关学科知识,建立综放采空区在高抽巷及瓦斯排放专用巷同时运行条件下气体渗流预测模型,对其进行数值模拟计算;通过改变高抽巷抽采负压来研究其对采空区"三带"的影响。

Aimed at No. 15109 working face in Huangyanhui Coal Mine, the oxygen concentration distribution in the goal was numerically simulated under the condition of simultaneous gas drainage in the high-level drainage roadway and the special roadway for the gas emission, based on the characteristics of floating coal spontaneous combustion in the goaf of high-gas mine after the gas drainage. Through the experimental simulation, the related characteristic parameters of coal spontaneous combustion were determined. In addition, the forecasting model of oxygen seepage was set up too and the numerical simulation was carried out on it. The influence of oxygen seepage on the ＂three zones＂ in the goaf was researched by changing the negative pressure for the gas drainage in the high-level roadway.