Field study results of a 3rd generation roof bolter canopy air curtain for respirable coal mine dust control  

作　　者：W.R.Reed M.Shahan S.Klima G.Ross K.Singh R.Cross T.Grounds 

机构地区：[1]NIOSH,Pittsburgh,PA.USA [2]J.H.Fletcher&Co.,Huntington WV,USA [3]Prairie State Generating Company LLC,Lively Grove,IL,USA

出　　处：《International Journal of Coal Science & Technology》2020年第1期79-87,共9页国际煤炭科学技术学报（英文）

摘　　要：A 3rd generation roof bolter canopy air curtain(CAC)has been developed and constructed by J.H.Fletcher&Co.,Inc.As with the previous generation of the CAC,this design uses the principle of providing uniform airflow across the canopy area as recommended by the National Institute for Occupational Safety and Health.The new modifications include a plenum that is constructed of a single flat aluminum plate,smaller-diameter airflow openings,and a single row of perimeter nozzles designed to prevent mine air contaminated by respirable dust from entering the CAC protection zone.Field testing was conducted on this new 3rd generation design showing reductions in coal mine respirable dust exposure for roof bolter operators.Dust control efficiencies for the CAC for the left bolter operator(intake side)ranged from approximately 26%–60%,while the efficiencies for the CAC for the right bolter operator(return side)ranged from 3%to 47%.

关 键 词：Roof bolter Respirable dust Coal mining Canopy air curtain 

分 类 号：TD714.4[矿业工程—矿井通风与安全]