Efforts to delineate underground mine workings in the vicinity of tailings impoundments has relied on available maps and confirmatory boreholes. Often the characterization of regions between boreholes remains suspect or entirely unknown. Surface geophysical measurements can be used to supplement the borehole data and better delineate these intermediate zones. Furthermore, geophysics can be used...

Fourteen samples of No. 6 coal seam were obtained from the Chuancaogedan Mine, Jungar Coalfield, Inner Mongolia, China. The samples were analyzed by optical microscopic observation, X-ray diffraction (XRD), scanning electron microscope equipped with an energy-dispersive X-ray spectrometer (SEM-EDS), inductively coupled plasma mass spectrometry (ICP-MS) and X-ray fluorescence spectrometry (XRF) ...

The alveolar macrophage (AM) is a critically important cell playing a prominent role in lung inflammation via the production of oxygen radicals, enzymes, arachidonic acid metabolites, and also a large panel of cytokines. Among interstitial lung disorders, silicosis and coal workers' pneumoconiosis (CWP) are the most widespread fibrotic lung diseases. Although their pathophysiology remains incom...

This article examines the spatial variability of dust concentrations within a coal miner's breathing zone and the impact of sampling location at the cap lamp, nose, and lapel. Tests were conducted in the National Institute for Safety and Health Pittsburgh Research Laboratory full-scale, continuous miner gallery using three prototype personal dust monitors (PDM). The dust masses detected by the ...

To explore whether the characteristics of coal mine dust that predispose to chronic airways obstruction are the same as those associated with pneumoconiosis, mortality from the two disease was compared in coal miners in 22 counties of England and Wales during 1979-80 and 1982-90. The proportional mortality ratios (PMRs) for coal workers' pneumoconiosis varied from 135 (95% confidence interval (...

Carbon monoxide (CO) and carbon dioxide (CO2) emissions during a spontaneous heating event in a coal mine are important gases to monitor for detecting the spontaneous heating at an early stage. However, in underground coal mines, the CO and CO2 concentrations and their related fire ratios may be affected by mine ventilation. In this study, CO and CO2 emissions from spontaneous heating of a U.S....

The need to engineer cover systems for the successful rehabilitation or remediation of a wide variety of solid wastes is increasing. Some common applications include landfills, hazardous waste repositories, or mine tailings dams and waste rock/overburden dumps. The brown coal industry of the Latrobe Valley region of Victoria, Australia, produces significant quantities of coal ash and overburden...

Acid drainage is most common problem or associated with almost all mines containing sulphide deposits and coal containing high pyrite. Acid drainage is caused when rain water and or seepage from rock formation interact with sulphur bearing minerals. It produces water of high acidity with higher metal concentration. Acid drainage is most susceptible to dissolve heavy metals particularly Iron, Zi...

I This contribution is one of a series of papers by the Multiple Fellowship on Mine Acid Control sustained at Mellon Institute by the Sanitary Water Board, Department of Health, Commonwealth of Pennsylvania. catalyst. Indeed, Carpeniter and Heirndon (1933) suggested that bacterial activity by some sulfur oxidizing organism might explain, in part, the high acidities usually encountered in bitumi...

I This contribution is one of a series of papers by the Multiple Fellowship on Mine Acid Control sustained at Mellon Institute by the Sanitary Water Board, Department of Health, Commonwealth of Pennsylvania. catalyst. Indeed, Carpeniter and Heirndon (1933) suggested that bacterial activity by some sulfur oxidizing organism might explain, in part, the high acidities usually encountered in bitumi...