Chongqing Research Institute,China Coal Technology and Engineering Group

针对王家岭煤矿综掘工作面煤层干燥、煤尘湿润性差、生产进度快的特点,基于原防尘措施,结合工作面产尘规律及掘进工作面风流流场分布,开展了低压大流量喷雾工艺改进、湿润剂配制及添加、通风除尘系统配套工艺优化等研究,研制了一套高效适用的综合防尘技术及装备,得到了适合于该煤层的高效环保型降尘剂配方及其最适宜的添加质量分数为0.5%,满足了工作面快速掘进需要。结果表明:采用该降尘技术司机处的总尘及呼吸性粉尘的降尘率分别达到98.7%和98.4%,粉尘质量浓度分别降至35.2、9.8 mg/m3,有效地解决了难湿润煤层快速综掘工作面的粉尘污染问题。

According to dry seam,poor moist coal dust and rapid production schedule features of a mechanized driving face in Wangjialing Mine,based on previous duc t prevention measures,in combination with the dust producing law of the driving face and the air flow field distribution of the driving face,an improvement of a low pressure high flow spraying technique,preparation and addition of the humectant,optimization on the marched technique of the ventilation dust collection system and other study wer e conducted. A high efficient and suitable comprehensive dust prevention technology and equipment was researched and developed. A formula of a high efficient and envir onment protection dustfall agent suitable to the seam and the suitable additional concentration of 0.5% were obtained to meet the requirement of the rapid driving face. Th. e results showed that with the application of the dust collection technology,the dust collection rate of the total dust and respirable dust at the place near the driver were 98. 7% and 98. 4% individually and the dust quantity and concentration was reduced to 35. 2 and 9. 8 mg 1 m3 individually. Thus the fine dust pollution problem of the rapid full y-mechanized working face in wetting difficultly seam was effectively solved.