自然风压对云南某矿井通风系统的影响分析  

Analysis of the influence of natural wind pressure on the ventilation system of a mine in Yunnan

作　　者：王孝东[1] 童学林 陈书鹏 符浩南 WANG Xiaodong;TONG Xuelin;CHEN Shupeng;FU Haonan(Faculty of Land and Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]昆明理工大学国土资源工程学院,昆明650093

出　　处：《有色金属（矿山部分）》2022年第2期29-33,共5页NONFERROUS METALS(Mining Section）

基　　金：云南省重点研发计划项目(2020003AC100002);昆明理工大学引进人才科研启动基金项目(KKSY201767034)。

摘　　要：自然风压对矿井通风系统的影响主要表现在通风网络和风机两个方面。为探究自然风压对云南某矿井通风系统的影响,通过整理5条线路,实测并计算出自然风压,通过绘制通风网络图、风机与自然风压联合运行曲线的方式,分析自然风压对通风系统的影响。结果表明:受自然风压影响,作为进风井的1#竖井出现反风现象,由2#进风平巷进入的新鲜风未经过作业区被1#竖井抽出;自然风压的变化对风机工况点产生了影响。在夏季,自然风压不利于矿井通风,风机工况点向左侧偏移,使风量减少约3.5%;在冬季,自然风压帮助风机做功,风机工况点向右侧偏移,使风量增加约4.9%。建议在进风分支e1处采用安装风门的形式控制1#竖井的反风现象,在通风困难时期采取增加风机功率和减小通风阻力的方法提高矿井风量。通过对自然风压的影响分析与控制方法的实施,有效地解决了自然风压对矿井通风系统的影响,基本达到预期效果。The influence of natural wind pressure on the ventilation system of a mine is mainly manifested in the two aspects of the ventilation network and fans,in order to explore the influence of natural wind pressure on the ventilation system of a mine in Yunnan.This paper sorted out 5 lines,measured and calculated natural wind pressure,and analyzed the influence of natural wind pressure on the ventilation system by drawing the ventilation network diagram and the combined operation curve of fans and natural wind pressure.The results showed that:affected by the natural wind pressure,the 1#shaft as the air intake shaft appeared reverse wind phenomenon,and the fresh air entering from the 2#air intake lane was drawn out by the 1#shaft without passing through the operation area;in summer,the natural wind pressure was not conducive to mine ventilation,the fan operating point is shifted to the left,reducing the air volume by about 3.5%.In winter,the natural wind pressure helps the fan to do work,and the fan operating point is shifted to the right to increase the air volume by about 4.9%.It is recommended to install a damper at the air inlet branch e1 to control the reversal phenomenon of shaft 1#,and to increase the power of the fan and reduce the ventilation resistance to increase the air volume in the mine during difficult ventilation periods.Through the analysis of the influence of natural wind pressure and the implementation of the control method,the influence of natural wind pressure on the mine ventilation system is effectively solved,and the expected effect is basically achieved.

关 键 词：自然风压 通风网络图 风机工况点 通风系统 联合运行曲线 

分 类 号：TD724[矿业工程—矿井通风与安全]