自然风压作用下工作面采空区漏风特征研究  

Research on air leakage characteristics in goaf of working face under natural wind pressure

作　　者：刘昆轮 常博 马祖杰 王刚 LIU Kunlun;CHANG Bo;MA Zujie;WANG Gang(Shenhua Xinjiang Energy Co., Ltd., Urumqi 830001, China;College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

机构地区：[1]神华新疆能源有限责任公司,新疆乌鲁木齐830001 [2]山东科技大学矿业与安全工程学院,山东青岛266590

出　　处：《工矿自动化》2020年第9期38-43,共6页Journal Of Mine Automation

基　　金：2018年自治区引进高层次人才天池百人计划(新人社函〔2019〕39号)。

摘　　要：以乌东煤矿南区+450 m水平B1+2煤层工作面为例,分析了自然风压变化规律,结合进风巷风量变化现场实测数据,定性说明自然风压对工作面的实际影响;通过求风速投射面积间接估算漏风量及漏风分布,结合现场实测和曲线拟合方法,对自然风压变化引起的工作面后方采空区漏风现象进行定量研究。研究结果表明:乌东煤矿南区自然风压变化会对其通风系统内的各分支及矿井主要通风机工况点产生明显影响;自然风压变化是影响B1+2工作面进风巷风量变化的主控因素;冬季由于自然风压较大,导致进风巷风量变大,漏入采空区风量比夏季漏入风量多,风流在采空区内部流速更快,采空区内部流场分布范围更广。Taking+450 m level B1+2 coal seam working face in the southern area of Wudong Coal Mine as an example,the law of natural wind pressure change is analyzed,combined with the field measured data of air volume changes in the air intake roadway,the actual impact of natural wind pressure on the working face is qualitatively explained.Air leakage amount and distribution are indirectly estimated by calculating projected area of wind speed,and the air leakage phenomenon in the goaf behind the working face caused by change of natural wind pressure is quantitatively studied combined with field measurement and curve fitting methods.Research result shows that the change of natural wind pressure in the southern area of Wudong Coal Mine has significant impact on branches in the ventilation system and the main ventilator operating points of the mine;the change of natural wind pressure is the main controlling factors that affects the change of air volume in the air intake roadway of B1+2 working face;In winter,due to the high natural wind pressure,the air volume in the air intake roadway becomes larger,the air amount leaking into the goaf is more than that in summer,the air flow velocity in the goaf is faster,and the flow field distribution range in the goaf is wider.

关 键 词：矿井通风 自然风压 采空区漏风特征 风速投射面积 

分 类 号：TD724[矿业工程—矿井通风与安全]