摘要
我国大多数露天煤矿位于北纬38°以北的干旱半干旱气候区,这些地区冬季温度低、无风频率高,加上露天煤矿高强-扰动下产生的大量粉尘,导致冬季采场粉尘污染十分严重。针对哈尔乌素露天煤矿采场的粉尘问题,采用监测点实时数据分析的方法,明确了采场气象因子的分布规律与颗粒物周期演化特征。研究结果表明:低温条件下,采场内部存在周期性的长时间大气逆温现象;采场无风频率高,风流集中出现在每天的12∶00至16∶00,风速主要集中在1.5m/s以下,风向主要为西北风和北风;采场颗粒物在正午前后出现显著降低趋势,颗粒物主要为PM_(10),其中又以PM_(2.5)居多;颗粒物质量浓度仅和湿度呈现显著的正相关关系,且颗粒物在东风、东北风、西北风风向下污染严重。
Most of the open-pit coal mines in China are located in arid and semi-arid climate areas north of 38°N latitude.These areas have low winter temperatures and high frequency of no wind,coupled with the large amount of dust generated under the high-strength disturbance of the open-pit coal mines,resulting in serious dust pollution in stopes during winter.Aiming at the dust problem in Haerwusu Open-pit Coal Mine,real-time data analysis of monitoring points is used to clarify the distribution law of meteorological factors and the periodic evolution characteristics of particulate matter in the stope.The research results show that:under low temperature,there is a periodic long-term atmospheric inversion phenomenon inside the stope;breezeless condition happens frequently in the stope,and the wind flow is concentrated at 12:00-16:00 every day,and the wind speed is mainly below 1.5 m/s,the wind direction is mainly northwest wind and north;the particulate matter in the stope shows a significant decreasing trend around noon,and the particulate matter is mainly PM_(10),most of which is PM_(2.5).The concentration of particulate matter only has significant positive correlation with humidity,and the particulate pollution is severe in the east,northeast,and northwest winds.
作者
程鹏
CHENG Peng(Haerwusu Open-pit Coal Mine,China Shenhua Energy Co.,Ltd.,Ordos 017100,China)
出处
《煤炭工程》
北大核心
2020年第S02期85-90,共6页
Coal Engineering
关键词
露天煤矿
气象因子
颗粒物质量浓度
open-pit coal mine
meteorological factors
particulate matter concentration
