Assessment of the respirable dust levels in the nation's underground and surface coal mining operations

Parobeck, P.S.; Jankowski, R.A.

doi:10.1080/15298667991430488

American Industrial Hygiene Association Journal

1979

DOI: 10.1080/15298667991430488

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Assessment of the respirable dust levels in the nation's underground and surface coal mining operations

P.S. Parobeck

R.A. Jankowski

Abstract: This report presents a chronological overview of the status of respirable dust exposures in underground and surface bituminous coal mines since inception of the 1969 Federal Coal Mine Health and Safety Act. Data for various intervals from 1970 through 1977, are presented for selected mining operations. Comparisons are made using data available from the mine operators' sampling program and from MSHA surveys. The data demonstrate the marked decrease that has occurred in respirable dust exposures since inception … Show more

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Cited by 13 publications

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“…4 Among underground miners with radiographs dated from 1996 to 2002, the proportion with CWP varied by state from 0 to 9.6%. 4 Despite excellent overall progress in reducing dust exposures, 5 severe cases of CWP, including progressive massive fibrosis (PMF), continue to occur among relatively young US coal miners. This report describes initial efforts to systematically identify rapidly progressive cases of CWP, and to investigate their geographic distribution and certain other factors that may contribute to disease causation.…”

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confidence: 99%

Rapidly progressive coal workers’ pneumoconiosis in the United States: geographic clustering and other factors

Antao

Petsonk²,

Sokolow³

et al. 2005

Occup Environ Med

142

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Background: Despite significant progress made in reducing dust exposures in underground coal miners in the United States, severe cases of coal workers' pneumoconiosis (CWP), including progressive massive fibrosis (PMF), continue to occur among coal miners. Aims: To identify US miners with rapidly progressive CWP and to describe their geographic distribution and associated risk factors. Methods: Radiographic evidence of disease progression was evaluated for underground coal miners examined through US federal chest radiograph surveillance programmes from 1996 to 2002. A case of rapidly progressive CWP was defined as the development of PMF and/or an increase in small opacity profusion greater than one subcategory over five years. County based prevalences were derived for both CWP and rapidly progressive cases. Results: A total of 886 cases of CWP were identified among 29 521 miners examined from 1996 to 2002. Among the subset of 783 miners with CWP for whom progression could be evaluated, 277 (35.4%) were cases of rapidly progressive CWP, including 41 with PMF. Miners with rapidly progressive CWP were younger than miners without rapid progression, were more likely to have worked in smaller mines (,50 employees), and also reported longer mean tenure in jobs involving work at the face of the mine (in contrast to other underground mining jobs), but did not differ with respect to mean underground tenure. There was a clear tendency for the proportion of cases of rapidly progressive CWP to be higher in eastern Kentucky, and western Virginia. Conclusions: Cases of rapidly progressive CWP can be regarded as sentinel health events, indicating inadequate prevention measures in specific regions. Such events should prompt investigations to identify causal factors and initiate appropriate additional measures to prevent further disease.

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mentioning

confidence: 99%

Rapidly progressive coal workers’ pneumoconiosis in the United States: geographic clustering and other factors

Antao

Petsonk²,

Sokolow³

et al. 2005

Occup Environ Med

142

View full text Add to dashboard Cite

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The incidence and progression of pneumoconiosis over nine years in U.S. coal miners: II. Relationship with dust exposure and other potential causative factors

Attfield¹,

Reger²,

Glenn³

1984

American J Industrial Med

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Examination of the incidence and progression of pneumoconiosis over 9 years in 1,261 nationally distributed U.S. coal miners has been undertaken in relationship to potential causative factors. Use has been made of a large body of data on dust levels collected by the Mine Safety and Health Administration principally for compliance purposes. Reported dust levels were low and generally under the current 2 mg/m3 standard. No link between dust level and disease progression could be detected. Some evidence was seen that radiological change was related to dust exposures prior to the study in both coal and noncoal mines, and thus experienced before the current dust standards were mandated. Neither migration of miners nor mining method appeared to be associated with disease incidence or progression. None of these findings can be taken as final, as the period of study is short and the number of cases of pneumoconiosis few. Further study is under way to obtain more reliable information over a longer period of follow-up.

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The accuracy of self‐reported regulatory data: The case of coal mine dust

Boden

Gold

1984

American J Industrial Med

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Coal-mine owners are required to measure miner exposures to respirable dust so that compliance with Federal health regulations can be monitored. This study analyzes the problem of possible underreporting of dust exposures. Using two statistical approaches, data for three mining occupations in 54 large underground coal mines during 1976-1978 are examined for evidence of underreporting. First, regression estimates compare dust concentrations reported by coal-mine owners with those reported by government health inspectors. Then, the statistical distribution of concentrations reported by coal-mine owners are examined for the size and nature of their deviation from log-normality. Both approaches suggest widespread underreporting.

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Assessment of the respirable dust levels in the nation's underground and surface coal mining operations

Cited by 13 publications

References 0 publications

Rapidly progressive coal workers’ pneumoconiosis in the United States: geographic clustering and other factors

Rapidly progressive coal workers’ pneumoconiosis in the United States: geographic clustering and other factors

The incidence and progression of pneumoconiosis over nine years in U.S. coal miners: II. Relationship with dust exposure and other potential causative factors

The accuracy of self‐reported regulatory data: The case of coal mine dust

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