Dust Monitoring, Characterization and Prediction in an Opencast Coal Mining Project

Dust pollution is the most important environmental issue associated with any opencast mining activity. Drilling, blasting, loading, transportation, crushing, conveying, haul road and the exposed overburden face generate large quantities of fugitive dust. Silica is a potential carcinogen and its exposure to the workers may be detrimental to their health which may result in progress of silicosis and lung cancer. Prediction of dust concentration in and around the mine is essential to have an impact assessment of the mining activity over the surrounding environment. In the view of this, current project work focuses on the real time monitoring of dust level at different sources of the mine using DustTrak II, personal exposure of dust to different workers using personal dust sampler, characterization of dust collected from different locations using FT-IR and finally prediction of dust concentration at different locations of the mine and nearby areas using AERMOD view software. Lakhanpur opencast project, the largest opencast mine of MCL in the Ib valley area producing more than 15MT of coal per annum, was chosen for study to have a better knowledge about the impact assessment due to dust from large opencast mines. The monitoring was conducted during December 2013 to assess scenario of dust pollution. The dust concentration was found to vary between 0.474mg/m3 to 150.0mg/m3 in PM10. Drilling and Surface Miner operations were found to be the major sources of dust generation. The dust exposure of worker was found to vary between 4.55mg/m3 to 29.41mg/m3. Minimum quartz content was found at coal transport road at 0.23% and maximum quartz content was found at wet haul road of LOCP at 0.49%. The predicted value of dust concentration (PM10) at most of the places was found to be below NAAQS-2009 limit for annual average of 60µg/m3

Trade dusts

THIS THESIS consists of a series of reports on the examination of men exposed to the effects of certain trade dusts, and a commentary on some of the points arising therefrom.The first report deals with the sandstone industry, the second with mica dust, the fourth with basic slag and the sixth with malthouse dusts. The third and fifth describe interesting cases of pulmonary fibrosis following exposure respectively to dusts of coal and boiler flues

Poor Man's Fortune

White working-class conservatives have played a decisive role in American history, particularly in their opposition to social justice movements, radical critiques of capitalism, and government help for the poor and sick. While this pattern is largely seen as a post-1960s development, Poor Man's Fortune tells a different story, excavating the long history of white working-class conservatism in the century from the Civil War to World War II. With a close study of metal miners in the Tri-State district of Kansas, Missouri, and Oklahoma, Jarod Roll reveals why successive generations of white, native-born men willingly and repeatedly opposed labor unions and government-led health and safety reforms, even during the New Deal. With painstaking research, Roll shows how the miners' choices reflected a deep-seated, durable belief that hard-working American white men could prosper under capitalism, and exposes the grim costs of this view for these men and their communities, for organized labor, and for political movements seeking a more just and secure society. Roll's story shows how American inequalities are in part the result of a white working-class conservative tradition driven by grassroots assertions of racial, gendered, and national privilege

Sources and Transportation of Bulk, Low-Cost Lunar Simulant Materials

Marshall Space Flight Center (MSFC) has built the Lunar Surface Testbed using 200 tons of volcanic cinder and ash from the same source used for the simulant series JSC-1. This Technical Memorandum examines the alternatives examined for transportation and source. The cost of low-cost lunar simulant is driven by the cost of transportation, which is controlled by distance and, to a lesser extent, quantity. Metabasalts in the eastern United States were evaluated due to their proximity to MSFC. Volcanic cinder deposits in New Mexico, Colorado, and Arizona were recognized as preferred sources. In addition to having fewer green, secondary minerals, they contain vesicular glass, both of which are desirable. Transportation costs were more than 90% of the total procurement costs for the simulant material

The efficiency of sandblasters' hoods in the prevention of silica exposure

This study evaluates the efficiency of abrasive blasting hoods in protecting sandblasters on two different Los Angeles Jobs (A and B) from crystalline silica exposure greater than the federal standard. Respirable, breathing zone air samples were taken outside and inside each hood in April, 1977 on Job A and between August and December, 1978 on Job B. Air samples were taken using portable pumps and PVC filters. The results of this study showed that the exposures were negligible since none of the samples collected inside the hoods had sufficient mass for X-ray diffraction analysis. According to the Occupational Exposure to Crystalline Silica [17] definition of “exposure to free silica,” the sandblaster on Job A was experiencing exposure to free silica outside his hood during this study, but the sandblasters and workers on Job B were not. The sampling results on Job A outside the hood were greater than the recommended half level indicating “exposure to free silica.” All samples collected outside the hoods were less than ten times the calculated or hypothetical threshold limit standards. All the hoods tested were effective in reducing the respirable free silica quantity outside the hoods to a quantity inside the hoods that was less than the accuracy of the electrobalance.Includes bibliographical references (pages 116-120)California State University, Northridge. Department of Health Sciences

Occupational respiratory diseases

Shipping list no.: 87-222-P."September 1986."S/N 017-033-00425-1 Item 499-F-2Also available via the World Wide Web.Includes bibliographies and index

Pneumoconiosis of Coal-Miners in Scotland

Abstract Not Provided

Toxicological profile for silica : draft for public comment

Public Comment Period Ends on September 11, 2017.tp211.pd

Toxicological profile for silica

cdc:46171CAS#: 7631-86-9Version history: September 2019, Final toxicological profile released; April 2017, Draft for public comment toxicological profile released.Reference: Agency for Toxic Substances and Disease Registry (ATSDR). 2019. Toxicological profile for Silica. Atlanta, GA: U.S. Department of Health and Human Services, Public Health Service.CS274127-Atp211.pdf2019671