基于风网特征图的瓦斯抽采系统仿真优化研究

Study on simulation optimization of gas drainage system based on mine ventilation network feature map

为了有效解决下沟矿瓦斯抽采系统在联网抽采过程中遇到的钻孔抽采负压低、抽采管路流量小、管路漏气等问题,提出了使用瓦斯抽采系统仿真模拟方法,并结合风网特征图对抽采系统进行优化。在对抽采管路管流参数计算基础上,使用MATLAB软件结合Cross算法对瓦斯抽采系统进行解算,得到抽采系统的风网特征图。在对风网特征图的"五线"特征分析基础上提出降阻优化措施。结果表明:钻场总平均混合抽采量0.149 1 m^3/s,上隅角混合抽采量0.262 2 m^3/s。瓦斯抽采管路的风网特征图呈现"三角形"分布,抽采流量随管路延长呈线性衰减,分析瓦斯抽采系统的风网特征图可直观地显示阻力分布并以此制定优化措施。

In order to effectively solve the low drainage negative pressure in the drilling borehole, the low flow of the drainage pipeline, the pipeline air leakage and other problems occurred in the network drainage process of the mine gas drainage system in Xiagou Mine, the optimization was condueted on the drainage system with the simulation method of the gas drainage system and the mine ventilation network features diagram. Based on the pipe flow parameter calculation of the drainage pipeline, the MATLAB software and Cross algorithm were ap- plied to solve the gas drainage system and the ventilation network feature diagram of the drainage system was obtained. Based on the analysis on the ＂five lines＂ features of the ventilation network feature diagram ,the optimized measures to reduce the resistance were provided. The results showed that the total average mixed drainage volume at the drilling site was 0.149 1 m3/s and the mixed drainage volume at the top corner was 0.262 2 m3/s. The ventilation network feature diagram of the gas drainage pipeline was in a triangle type distribution, the drainage flow was decayed in a linear with the pipeline expanded, and the analysis on the ventilation network diagram of the gas drainage system could directly show the resistance distribution, so as to set up the optimized measures.