附壁风筒径向流量比及抽尘距离对综掘工作面隔尘风幕的影响

发布时间：2018-03-05 11:32

本文选题：附壁风筒　切入点：径向流量比例　出处：《化工进展》2017年10期 　论文类型：期刊论文

【摘要】：为明确附壁风筒径向流量所占压风总量的比例及抽风筒的抽尘距离对综掘区域隔尘风幕形成及隔尘效果的影响,以蒋庄煤矿3下610综掘工作面为研究对象,运用Ansys CFD软件对附壁风筒径向流量比例为50%~90%、抽尘距离为2~5m条件下的风流运移及粉尘逸散情况进行数值模拟分析。结果显示,径向流量比例的增加、抽尘距离的降低,有利于在综掘区域形成有效隔尘风幕。针对3下610综掘工作面及与其生产条件相似的其他煤矿综掘工作面,当径向流量比例为80%、抽尘距离为2m以及径向流量比例为90%、抽尘距离为2~3m时,能够形成有效隔尘风幕并将高浓度粉尘阻隔于距迎头7.5m以内的空间范围内。现场实测数据表明,风流运移模拟结果与风流实测结果基本一致、风流流速平均相对误差低于13%,模拟结果较为准确。最优风幕参数条件下,距迎头7m实测断面处,平均总尘浓度降至18.6mg/m3,平均呼尘浓度降至8.1mg/m3,隔尘效果较为明显。
[Abstract]:In order to determine the proportion of the radial flow rate of the wall attached tuyere to the total pressure air volume and the influence of the dust extraction distance of the exhaust tube on the formation of the dust screen and the dust isolation effect in the fully mechanized excavation area, this paper takes Jiangzhuang coal mine 3 lower 610 fully mechanized excavating face as the research object. Ansys CFD software is used to simulate the air flow migration and dust dissipation under the condition of 50 ~ 90 mm radial flow ratio and 2 ~ 5 m dust extraction distance. The results show that the increase of radial flow ratio leads to the decrease of dust extraction distance. It is beneficial to form an effective dust screen in the area of fully mechanized excavation. For 3 lower 610 fully mechanized excavating face and other fully mechanized coal mining face similar to its production conditions, When the radial flow ratio is 80, the dust extraction distance is 2m, the radial flow ratio is 90 and the dust extraction distance is 2m, the effective dust screen can be formed and the high concentration dust can be blocked within the space range of 7.5 m from the head of the head. The simulation results of air flow migration are basically consistent with the measured results. The average relative error of air flow velocity is less than 13 and the simulation results are more accurate. Under the optimal conditions of air curtain parameters, the measured section is 7 m away from the head of the wind. The average total dust concentration decreased to 18.6 mg / m ~ (3) and the average dust concentration decreased to 8.1 mg / m ~ (3).
【作者单位】：山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地;山东科技大学矿业与安全工程学院;
【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(51404147) 中国博士后科学基金第57批面上一等项目(2015M570601) 研究生科技创新项目(SDKDYC170101)
【分类号】：TD714.4

【相似文献】