巷道交叉对矿井通风影响的数值分析及实验验证
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摘要
为研究巷道交叉对矿井通风系统局部通风阻力的影响,以城郊煤矿巷道通风情况为工程背景,采用数值模拟和现场实测相结合的方法,确定交叉巷道汇流与分流、锐角与钝角对通风阻力损失的影响大小。研究结果表明:汇流比分流的阻力损失要小,锐角汇流比钝角汇流的阻力损失要小。因此,设计巷道时应尽量减少分流及钝角汇流,避免巷道交叉时出现风流急转情况,从而降低局部通风阻力。
In order to study the influence of roadway crossing on local ventilation resistance of mine ventilation system,the ventilation of the roadway in Chengjiao Coal Mine was taken as the engineering background. Numerical simulation and field measurement were adopted to determine the effect of confluence,shunt,obtuse-angle,and acute-angle on the resistance loss of crossing roadway. The results show that the resistance loss of confluence is smaller than that of shunt,the resistance loss of acute-angle confluence is smaller than that of obtuse-angle. Therefore,in the design of roadway,shunt and obtuse confluence should be minimized to avoid airflow sharp rotation when the roadway crosses,so as to reduce local ventilation resistance.
In order to study the influence of roadway crossing on local ventilation resistance of mine ventilation system,the ventilation of the roadway in Chengjiao Coal Mine was taken as the engineering background. Numerical simulation and field measurement were adopted to determine the effect of confluence,shunt,obtuse-angle,and acute-angle on the resistance loss of crossing roadway. The results show that the resistance loss of confluence is smaller than that of shunt,the resistance loss of acute-angle confluence is smaller than that of obtuse-angle. Therefore,in the design of roadway,shunt and obtuse confluence should be minimized to avoid airflow sharp rotation when the roadway crosses,so as to reduce local ventilation resistance.
引文
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[4]李雨成,刘天奇,周洋,等.基于风量反演风阻的节点压能解析方法[J].煤炭学报,2015,40(5):1076-1080.
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[6]刘剑,李雪冰,陈廷凯,等.矿井定常湍流脉动对通风阻力测试影响的理论分析[J].中国安全生产科学技术,2016,12(5):22-25.
[7]黄光球,徐晓龙,陆秋琴.复杂通风网络总风阻快速计算方法[J].安全与环境学报,2016,16(1):66-71.
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[10]张洪斌,高军军,李雨成.凤凰山矿通风阻力测定分析与优化实践[J].矿业安全与环保,2017,44(1):83-86.
[11]李孔清,邹声华,张坻.巷道内传质对通风阻力的影响[J].应用力学学报,2016,33(2):358-364.
[12]张秀华,王李管,董子良.高温高湿矿井湿热空气对通风阻力的影响[J].矿业研究与开发,2012,32(1):69-77.
[13]张国枢.通风安全学[M].徐州:中国矿业大学出版社,2000:44-51.
[14]白子靖.井巷通风阻力降低措施分析[J].能源与节能,2016(6):6-7.
[15]王福军.计算流体动力学分析[M].北京:清华大学出版社,2004:120-122.
[16]谢中朋.复杂矿井通风系统稳定性研究[D].北京:中国矿业大学(北京),2015.