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- Geologic conditions and events:
- Gas emissions
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9/1/2008 - Peer reviewed journal articlesThis study presents a reservoir modeling approach to investigate the relative effects of different coalbed parameters on the migration of methane into development entries, and shows that this technique can be applicable to different coalbeds.
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4/1/2008 - Information CircularsThis report presents a historical framework detailing the impact of geologic features on excess gas emissions and resultant mine explosions.
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6/1/2006 - Book chapters, Information CircularsThis chapter summarizes how certain geologic features may be associated with unexpected increases in gas emissions during coal mining. These unexpected emissions have the potential to create explosive conditions in the underground workplace. Also discu...
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6/1/2006 - Book chaptersThis chapter provides guidelines for determining the gas content of coalbeds, estimating the gas-in-place, and predicting gas flow and emissions before and during coal mining operations.
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6/1/2005 - Conference papersThis paper describes the application of a finite difference program to develop a geomechanical model that predicts permeability changes within the rock mass.
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5/1/2005 - Conference papersNIOSH has initiated a reservoir modeling effort to better understand the interaction of the various geotechnical factors influencing gas flow within and to the underground longwall mining environment. A focus of this modeling effort has been (1) the pre...
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10/1/1999 - Reports of InvestigationsAn analysis of the consequences of increasing longwall panel dimensions, particularly face width, in gassy coalbeds. Continuous longwall face emission monitoring studies were conducted at two adjacent mines operating in the Pocahontas No. 3 Coalbed, whe...
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2/1/1998 - Peer reviewed journal articlesCoalbed gas content measurements are commonly used in mine safety as well as coalbed methane resource assessment and recovery applications. Gas content determination techniques generally fall into two categories: (1) direct methods which actually measu...
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11/1/1997 - Technology NewsA method is described for allowing operators to predict methane emissions from panels with increased face width.
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2/1/1997 - Conference papersIncreasing longwall panel dimensions, particularly face width in gassy coalbeds, may result in unexpected increases in methane emissions. To investigate this problem, continuous longwall face emission monitoring studies were conducted at two adjacent mi...
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Content source: National Institute for Occupational Safety and Health, Mining Program