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为得到U型综采工作面采空区的流场分布,根据11124工作面实际情况建立了采空区二维物理模型,利用FLUENT软件及自适应网格加密技术对所建模型进行数值模拟研究。模拟得到的工作面风速分布与实测数据基本吻合,从而验证了数值模拟结果的合理性。研究表明:工作面向采空区漏风主要发生0~20 m范围内,漏入采空区的风量在此区域内有部分返回工作面,而大部分漏风量在工作面倾向140~160 m返回工作面;采空区风速等值线在倾向方向上并不对称;在采空区走向方向,漏风风速呈逐渐减小趋势。
In order to obtain the flow field distribution in the goaf of the U-type fully mechanized coal mining face, a two-dimensional physical model of the goaf was established based on the actual situation of the 11124 working face and the numerical simulation of the model was done by using FLUENT software and adaptive grid encryption . The simulated wind speed distribution is in good agreement with the measured data, which verifies the rationality of numerical simulation results. The results show that the air leakage to the goaf mainly occurs within 0 ~ 20 m, and the air leakage into the goaf returns to the working face in this region, while most of the air leakage in the working face tends to return to 140 ~ 160 m Surface; the isoline of wind speed in goaf is not symmetrical in the direction of inclination; in the direction of goaf, the wind speed of wind leakage decreases gradually.