Research on Comprehensive Dust Reduction Technology in Fully Mechanized Mining Face
The characteristics of high gas content and low coal seam moisture content in the 5#coal seam of the 3506 fully mechanized mining face are that the dust concentration is high during the mining process,which to some extent restricts the safe and efficient coal mining and affects the physical health of on-site workers.According to the site conditions and the characteristics of Coal Seam 5#,it is proposed to comprehensively use coal seam advance water injection,full coverage spray(including dust source tracking spray,hydraulic support shifting spray to reduce dust,and automatic spray in return air lane),and formulate targeted dust reduction measures in the crushing and transfer links.After on-site application,the amount of dust overflow in various links such as coal cutting,frame moving,and transportation in the 3506 fully mechanized mining face was well controlled.The respiratory dust and total dust reduction at each position of the mining face exceeded 79.0%and 82.8%respectively compared to before application,achieving good comprehensive dust reduction effects.
coal miningdust controlcoal seam water injectionspray dust suppression
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