摘要
为明确附壁风筒径向分风与巷道压风配比对风幕阻尘的影响,建立了三交河煤矿2-5082综掘面等比例物理模型,并运用FLUENT软件对压风量Q为350~600m^3/min、附壁风筒径向分风量与压风量配比B为50%~90%条件下的风流运移及粉尘扩散情况进行数值模拟分析.结果表明,综掘面Q的降低以及B的增加有利于在迎头范围内形成阻尘风幕,迎头风流场阻尘能力亦随之增强.对于2-508_2综掘面及与其生产条件相似的综掘面而言,当Q为350~400m^3/min,B为80%~90%及Q为450m^3/min,B为90%时能够在综掘司机前部断面空间形成有效阻尘风幕,其中,Q为350m^3/min、B为90%时风幕阻尘效果最佳.将数值模拟结果在2-5082综掘面进行工程应用,实测结果表明数值模拟结论较为准确,附壁风筒形成的阻尘风幕能够将50mg/m^3以上的高浓度粉尘阻控在距迎头10m以内的巷道空间内,有效改善了综掘区域作业环境.
In order to clarify the effects of ratio of radial partial air volume to pressure air volume on air curtain dust control,a scaled physical model was developed for the 2-5082 fully mechanized working face in Sanjiaohe coal mine.The airflow migration and dust diffusion were numerically simulated using FLUENT for the pressure air volume Q was from 350 to 600 m^3/min and the ratio of radial partial air volume of a wall-attached ventilation duct to pressure air volume B was from 50% to 90%.The results show that the decrease of Q and the increase of B are both beneficial to the formation of a dust-control air curtain in the working face and the dust resistance capability is improved as well.For the 2-5082 fully mechanized working face and those working faces with similar conditions,an effective dust-control air curtain can be formed at the front section of the mining driver when Q is from 350 to 400 m^3/min,B is from 80% to 90% and also Q is 450 m^3/min,B is 90%.Among these parameters,the best dust-control effect can be achieved when Q is 350 m^3/min,B is 90%.By field application,measuring data show that the simulation results are accurate.The dust with concentration higher than 50 mg/m^3 is blocked within the space 10 m from working face and the environment at fully mechanized working area could be improved effectively.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2017年第5期1014-1023,共10页
Journal of China University of Mining & Technology
基金
国家自然科学基金煤炭联合基金重点项目(U1261205)
国家自然科学基金青年基金项目(51404147)
山东科技大学研究生科技创新项目(SDKDYC170101)
关键词
压风量
附壁风筒
分风配比
风幕阻尘
pressure air volume
a wall-attached ventilation duct
partial air ratio
air curtain dust control
作者简介
通信作者：王昊（1990-），男，山东省邹城市人，博士研究生，从事矿山粉尘灾害防治方面的研究．E—mall：wanghao1990_andy@163．comTel：15194261763
