Research and Application of Key Technology and Equipment for Dust Control in the Process of Coal Cutting

In view of dust pollution problem in coal mining process, following the concept of "restraining first, controlling later and reducing finally", this paper puts forward a comprehensive treatment measure by using high efficiency anti-dust sprays to wet coal body rapidly, then controlling the dust flow along the side of the coal wall by using the dust control spray, and finally taking airborne spray ejector dust collector to control dust. The key technologies and equipments, such as combined spray dust suppression on the top of the support, spray dust control and dust removal by the shearer, and airborne dust removal on the shearer, were mainly studied by combining laboratory experiment and field experiment. It was also applied in the fully mechanized working face with high dust intensity, the total dust mass concentration at the driver's place during the normal coal cutting of the shearer was reduced from 3 097.0 mg/m³ to 52.6 mg/m³, the effect of dust removal was significant.