风速对浅埋近距离煤层上覆采空区氧化带分布的影响研究  

Study on Influence of Wind Speed on Distribution of Oxidation Zone in Overlying Goaf of Shallow and Close Coal Seams

作　　者：王文才 赵婧雯 李扬康 薛佩峰 WANG Wencai;ZHAO Jingwen;LI Yangkang;XUE Peifeng(School of Mining and Coal,Inner Mongolia University of Science and Technology,Baotou 014010,China;Dalat Banner Sujiagou Coal Co.,Ltd.,Ordos 014300,China)

机构地区：[1]内蒙古科技大学矿业与煤炭学院,内蒙古包头014010 [2]达拉特旗苏家沟煤炭有限责任公司,内蒙古鄂尔多斯014300

出　　处：《煤炭技术》2023年第9期114-118,共5页Coal Technology

基　　金：国家自然科学基金资助项目(52064043);内蒙古自治区自然科学基金项目(2020MS05010)。

摘　　要：以苏家沟煤矿浅埋近距离煤层采空区的特点为例,建立贯通型裂缝连通地表和上覆采空区的三维模型。基于ANSYS FLUENT模拟软件对采空区不同风速条件下的氧气浓度分布进行研究,结果表明:随着进风巷风速的增加,采空区距工作面0~20 m内的氧气浓度呈现持续增加的规律,采空区深部的氧气浓度则呈现先增大后减小的趋势;当风速为3 m/s时,氧化带分布范围最广,上覆采空区的氧化带主要集中在工作面附近及回风侧裂隙所在位置。研究结果为同类型煤矿采空区自燃防护措施的合理分布提供参考。Sujiagou coal mine has the characteristics of shallow coal seam buried depth and close coal seam spacing.Taking the coal mine as the prototype,a three-dimensional model was established,in which the through cracks could connect the surface and the overlying goaf.The oxygen concentration distribution in goaf under different wind speed conditions was simulated by ANSYS FLUENT.The results show that with the increase of wind speed from the air inlet roadway,the oxygen concentration in the range of 0-20 m directly above the working face increases,and the oxygen concentration in the deep part of the goaf increases first and then decreases.When the wind speed reached 3 m/s,the oxidation zone in the goaf was most widely distributed.The oxidation zone of the overlying goaf is mainly concentrated near the working face and the position of the fissure on the return air side.The research results provide a reference for the reasonable distribution of spontaneous combustion prevention measures in goaf of the same type of coal mines.

关 键 词：近距离煤层 上覆采空区 进风巷风速 氧化带分布 

分 类 号：TD752.2[矿业工程—矿井通风与安全]