Details:

Alternative Title:
J Mine Vent Soc S Afr
Personal Author:
Grau, Roy H. ; Mazzella, Andrew L. ; Martikainen, Anu L. ;
Grau, Roy H. ; Mazzella, Andrew L. ; Martikainen, Anu L. ; Less -
Description:
The proper sealing of stoppings is an important step in reducing leakage from the intake to the return airways. Leakage and the subsequent loss of ventilation resulting from improperly sealed stoppings can lead to unhealthy and unsafe working conditions. The research presented in this paper investigates the total leakage of a stopping, including air leakage through the stopping, at the stopping perimeter, and through the coalbed. The study also examines sealing considerations for stoppings that are constructed under roof control screen, the effects that wooden wedges had on inhibiting efficient application of polyurethane foam sealant, and airflow leakage through the surrounding coal. The work involved building a stopping in a dead end room of the NIOSH Safety Research Coal Mine and then pressurising the room using compressed air. Stopping leakage was evaluated by measuring air pressure loss in the enclosed room due to the air leakage. Part of the research utilises a diluted soap solution that was applied to the stopping and the surrounding coal to detect air leakage signified by bubble formations. The results show that stopping leakage can be minimised with proper sealing.
Subject:
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Article

Source:
J Mine Vent Soc S Afr. 65(3):16-21. ;
Pubmed ID:
26379366
Pubmed Central ID:
PMC4567546
Document Type:
Journal Article ;
Funding:
YLH8/Intramural CDC HHS/United States ;
Collection(s):
CDC Public Access
Main Document Checksum:
[+]
urn:sha256:429d87dcf8fe254262cb01d5b50098161ed261f9bbc3c74a6511022cc7b33a8d
File Type:

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