基于UDF的自然风压对果洛龙洼矿井通风稳定性影响的数值模拟

UDF-based numerical simulation of natural wind pressure influence on the ventilation stability in Guoluolongwa Mine

以果洛龙洼矿井为研究对象,通过Gambit软件建立矿井通风系统的气固耦合模型,并划分网格;编写了关于调热圈半径处原始岩温、气流密度、导热系数、气流黏度的UDF;用Fluent软件模拟出矿井的自然风压,将模拟所得的相关参数与现场测量数据作比较,验证自然风压数值模拟的可行性;进而更改模拟的环境温度及模型边界条件,分别模拟出不同环境温度条件下矿井的自然风压,解释了果洛龙洼矿井巷道风流变化显著的现象;利用Origin软件对多种环境气温条件下的自然风压曲线进行拟合,导出回风竖井中自然风压的经验公式;为高海拔地区矿井通风研究提供参考。

The gas-solid coupling model of mine ventilation system is established and meshed by Gambit software, taking Guoluolongwa Mine as the research object. UDF of the original rock temperature in the radius of ad- justable hot lap, air density, thermal conductivity and air viscosity are compiled. Natural wind pressure simulating results, which are simulated by Fluent software, are compared with the actual measured data, indicating that the numerical simulation about natural wind pressure is feasible. In order to explain the significant natural airflow changes in Guoluolongwa Mine roadways, the natural wind pressure under different environmental conditions are respectively simulated by changing temperature and boundary conditions. Meanwhile, the empirical formulas about natural wind pressure in the return air shaft are derived by using Origin software to fit the natural pressure curves under a variety of environmental temperature conditions. Consequently, the numerical simulation result provides reference for the study on mine ventilation at high altitudes.