采空区自燃“三带”分布数值模拟研究  

FLUENT Software was Used to Simulate the Mining Working Face Goaf of Oxygen Concentration Field

作　　者：轩建军 

机构地区：[1]中国平煤神马集团十一矿,河南平顶山467000

出　　处：《煤炭工程》2013年第11期53-56,共4页Coal Engineering

基　　金：国家自然科学基金资助项目(50974003)

摘　　要：根据现场实际情况实测的部分已知参数(风量、风压及采空区尺寸大小等),利用FLUENT软件模拟采煤工作面采空区的氧浓度场,将模拟结果与现场实测数据(氧气浓度分布)进行对比分析,并对模拟参数作相应调整,直到模拟结果与现场实测数据吻合,由此可以反演出正确的模拟参数(孔隙率、渗透率及粘性阻力等),最终模拟出氧浓度场、速度场、瓦斯浓度分布及压力分布,通过双指标法(上限漏风风速0.004m/s和下限氧浓度8%)划分采空区自燃"三带",对模拟结果分析可以得到采空区最大自燃带宽度为58m,并计算工作面安全回采速度为2.3m/d。According to the available parameters （ ventilation quantity, ventilation pressure, size of the goal and others） of the measured part of the site real condition, the FLUENT software was applied to simulate the oxygen concentration field in the goaf of the coal mining face. The simulation results and the site measured data （the oxygen concentration distribution） would be compared and analyzed and then the simulation parameters would be relatively adjusted and until the simulation results and the site measured data were be fitted. Therefore the accurate simulated parameters （porosity, permeability, viscosity resistance and others） could be inverted and the oxygen concentration field, velocity field, gas concentration distribution and pressure distribution could be simulated finally. With the double index method （the top limit air leakage velocity of 0. 004m/s and the low limit oxygen concentration of 8% ） to divide the spontaneous combustion ＂three zones＂ in the mining goat＇, the analysis of the simulation results could have the max width of the spontaneous combustion zone of 58 m in the minin zoaf and the safety minin advancin soeed of 2. 3m/day could be calculated for the coal minin face.

关 键 词：自燃“三带” 双指标法 FLUENT模拟 气体分布 

分 类 号：TD75[矿业工程—矿井通风与安全]