论文部分内容阅读
1 技术改造前通风概况 郑煤集团大平煤矿东翼主扇风机原电机4—72—11N020B风机,该风机的最高转速为710r/min,最大风量为190000m3/h,最高全压为2 765Pa。随着矿井采区的延伸及采掘工作面的增加,导致矿井东翼用风量增加到240 000m3/h,负压增加到3 300Pa。因此,4—72—11N020B型风机已不能满足矿井东翼安全生产的需要。 按通常方法,需在机房附近新建设机房,安装能力相适应的扇风机及配套设施,但存在投资大、工期长,使原有设备闲置、受地理条件限制很难选址或毁坏耕地等的问题。 如何解决这些问题,最大化利用原有资源,采用相应的技术措施对其改型升级,使之达到矿井通风系统网络参数要求。
1 ventilation before technical transformation Zhengzhou Coal Group Daping coal mine east of the main fan of the original motor 4-72-11N020B fan, the maximum speed of the fan 710r / min, the maximum air volume of 190,000 m3 / h, the maximum total pressure of 2 765Pa. With the extension of the mining area and the increase of the mining face, the air volume in the eastern wing of the mine increased to 240,000m3 / h and the negative pressure increased to 3,300Pa. Therefore, 4-72-11N020B-type fan can no longer meet the needs of the safe production of the eastern mine shaft. According to the normal method, a new engine room needs to be installed in the vicinity of the engine room to install fan fans and ancillary facilities suitable for capacity. However, there are large investments and long construction periods, which make the original equipment idle and difficult to locate or destroy cultivated land due to geographical constraints problem. How to solve these problems, to maximize the use of existing resources, the use of appropriate technological measures to upgrade its transformation, so that mine ventilation system to meet the network parameters.