煤矿、选煤厂、电厂、焦化厂、煤码头以及城市煤站的煤场都存在着煤尘污染大气环境和煤炭资源无谓损失的大问题。据资料介绍,煤场在风力(不包括大气降水)作用下,损失约占千分之五,附近大气含尘量一般高达30～100mg/m~3,超过大气环境质量标准规定数十倍。问题的严重性虽早已暴 Coal mines, coal preparation plants, power plants, coking plants, coal terminals, and coal yards at urban coal stations all have major problems of coal dust pollution, atmospheric environment, and unnecessary loss of coal resources. According to the data, the loss of the coal yard under wind (excluding atmospheric precipitation) accounted for about 5/1000, and the dust content in the nearby atmosphere was generally as high as 30 to 100 mg/m 3, which exceeded the atmospheric environmental quality standard by several times. Although the severity of the problem has long been violent