为了解决大冶铁矿尖林山车间井下通风系统中存在的主扇能力不足、矿井总风量不足、采区通风困难、系统外部漏风等问题,通过现场调研,提出了对通风系统风网结构和主扇设置等进行技术改造的方案.首先采用斯科特·辛斯利(Scott—Hinsley)回路解算方法进行分网分析,开发了矿井通风系统软件(Mvnet Versionl.4),并根据井下各中段作业面需风量,应用该软件进行了通风网络解算.然后通过软件解算和风机特性曲线拟合,获得了一组风机效率75％以上,满足各中段作业需求的井下通风系统的解算结果,并确定了额定功率、叶片角度、风量和风压等风机运行基本参数.最后根据解算结果,提出对矿井通风系统关键部位采用增阻和辅扇等技术进行风量风压调节,以满足井下各中段作业需风量要求.通过技术改造,提高了矿井安全性,节约了通风费用,产生了较大的经济和社会效益.%To solve the problems existing in the Daye Jianlinshan iron mine ventilation system,including insufficient capacity of main fan,inadequate total amount of airflow,ventilation difficulties and external leakage,a reconstruction program was proposed'to reform the structure of ventilation system and ventilation fans of the underground mine based on the field investigation.Firstly,the software Mvnet (mine venlation net system) Version 1.4 was developed through Scott-Hinsley loop solution method,and used to solve the mine ventilation network according to required amount of airflow on each workplace of underground mine.Then through the software analysis and fan characteristic curve fitting,a group of fan efficiency exceeds 75％,which meets the needs of underground work； the basic parameters of fan operation,such as rated power,blade angle,air flow and fan operation pressure are determined.According to the calculation results,the methods of increasing resistance and using auxiliary fans on the key points are proposed to meet the air volume requirements on each underground work platform.Finally,the safety of the mine is improved and the ventilation costs are saved through technological innovation,which have great economic and social benefits.
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