Evaluation of Roof Bolter Canopy Air Curtain Effects on Airflow and Dust Dispersion in an Entry Using Blowing Curtain Ventilation

2019 ◽  
Vol 36 (6) ◽  
pp. 1115-1126 ◽  
Author(s):  
Y. Zheng ◽  
W.R. Reed ◽  
M.R. Shahan ◽  
J.P. Rider
Keyword(s):  
Air Curtain ◽  
Roof Bolter ◽  
Canopy Air Curtain ◽  
Dust Dispersion

scholarly journals Development of a roof bolter canopy air curtain for respirable dust control

2017 ◽  
Vol 69 (1) ◽  
pp. 33-39 ◽  
Author(s):  
W.R. Reed ◽  
G.J. Joy ◽  
B. Kendall ◽  
A. Bailey ◽  
Y. Zheng
Keyword(s):  
Dust Control ◽  
Respirable Dust ◽  
Air Curtain ◽  
Roof Bolter ◽  
Canopy Air Curtain

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

2019 ◽  
Vol 7 (1) ◽  
pp. 79-87 ◽  
Author(s):  
W. R. Reed ◽  
M. Shahan ◽  
S. Klima ◽  
G. Ross ◽  
K. Singh ◽  
...  
Keyword(s):  
Coal Mine ◽  
Occupational Safety ◽  
Dust Control ◽  
Respirable Dust ◽  
Dust Exposure ◽  
Air Curtain ◽  
Roof Bolter ◽  
Study Results ◽  
Canopy Area ◽  
Canopy Air Curtain

AbstractA 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%.

Field Testing of Roof Bolter Canopy Air Curtain Operating Downwind of the Continuous Miner

2020 ◽  
Author(s):  
William R. Reed ◽  
Michael Shahan ◽  
Vasu Gangrade ◽  
Garron Ross ◽  
Kunal Singh ◽  
...  
Keyword(s):  
Field Testing ◽  
Air Curtain ◽  
Continuous Miner ◽  
Roof Bolter ◽  
Canopy Air Curtain

scholarly journals A field study of a roof bolter canopy air curtain (2nd generation) for respirable coal mine dust control

2019 ◽  
Vol 29 (5) ◽  
pp. 711-720 ◽  
Author(s):  
W.R. Reed ◽  
S. Klima ◽  
M. Shahan ◽  
G.J.H. Ross ◽  
K. Singh ◽  
...  
Keyword(s):  
Field Study ◽  
Coal Mine ◽  
Dust Control ◽  
Air Curtain ◽  
2Nd Generation ◽  
Mine Dust ◽  
Roof Bolter ◽  
Canopy Air Curtain

scholarly journals Design and Characterization of Canopy Air Curtain for Protecting Against Diesel Particulate Matter Exposures in Underground Mines

2020 ◽  
Author(s):  
James Noll ◽  
Randy Reed ◽  
Drew Potts ◽  
Mike Shahan
Keyword(s):  
Particulate Matter ◽  
Underground Mines ◽  
Submicron Particles ◽  
Diesel Particulate Matter ◽  
Breathing Zone ◽  
Original Design ◽  
Diesel Particulate ◽  
Air Curtain ◽  
Mine Worker ◽  
Canopy Air Curtain

Abstract Blasters are one of the highest exposed work groups to diesel particulate matter (DPM) in underground metal/nonmetal mining. These workers can spend a good portion of their day under a canopy in a basket loading blastholes with explosives. Therefore, one way of potentially reducing their exposures to DPM is to place a canopy air curtain (CAC) on the basket of the ANFO loader. In the original design of the CAC on a roof bolting machine and shuttle car, a fan draws in air through a filter to capture the dust and then supplies clean air beneath the canopy where a miner is working. This paper describes the testing of a CAC that was redesigned to fit an ANFO loader and prevent exposures to DPM as well as respirable dust. Laboratory measurements demonstrated reductions of submicron particles that relate to the percent reductions of DPM. The CAC provided substantial protection of mine workers to DPM (80% reductions), from within 15.24 cm (6 inches) of the edge of the CAC using a 7.62-cm (3-inch) lip. As the mine worker approaches the edges of the CAC, the percent reduction starts to reduce to the 30–50% range. The mine worker achieves the best results when within 15.24 cm (6 inches) from the edge of the CAC. In addition, the CAC should be located such that the breathing zone of the mine worker is 25.4–50.8 cm (10–20 inches) below the CAC.

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