“滚球法”在煤矿瓦斯抽采泵站防雷设计中的应用

Application of“rolling ball method”in lightning protection design of gas extraction pump station in coal mine

煤矿瓦斯抽采泵站由于其工艺的特殊性,遭受雷击可能会造成严重事故,存在较大安全隐患。文章结合雅店煤矿瓦斯抽采泵站的实际情况,根据相关设计规范确定建筑物的防雷等级,采用“滚球法”确定防雷保护范围,并针对各种防雷形式进行安全性分析。结果发现选用单支/双支接闪杆、单根接闪线作为接闪器时,均不能满足放散管作为第一类防雷建筑物的相关要求;应优先选用多支等高接闪杆作为接闪器,当选用多支接闪杆不能满足防雷要求时,再选用两根接闪线进行保护。

Due to the particularity of the technology,the gas extraction pump station in coal mine suffers from the major hidden danger of severe accidents when struck by lightning.Based on the reality of the gas extraction pump station in Yadian Coal Mine,the lightning protection level of buildings is determined according to relevant design specifications,the scope of lightning protection is obtained using the“rolling ball method”,and the safety of various lightning protection forms is analyzed.It is found that when single/double lightning rod and single lightning wire are used as lightning arresters,the relevant requirements of the first type of lightning protection building can't be satisfied;multiple equal height lightning rods are preferred as lightning arresters;when multiple lightning rods can't meet the requirements of lightning protection,two lightning wires should be used for protection.