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《Coal Science and Technology》 2015-01
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Fine dust prevention and control technology of rapid fully-mechanized working face in wetting difficultly seam

MA Wei;LIU Yong;CHEN Fang;Chongqing Research Institute,China Coal Technology and Engineering Group;  
According to dry seam,poor moist coal dust and rapid production schedule features of a mechanized driving face in Wangjialing Mine,based on previous duct 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 were conducted. A high efficient and suitable comprehensive dust prevention technology and equipment was researched and developed. A formula of a high efficient and environment 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. The 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 / m3 individually. Thus the fine dust pollution problem of the rapid fully-mechanized working face in wetting difficultly seam was effectively solved.
【CateGory Index】: TD714.4
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