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Results 11 - 20 of 111
9/1/2007 - Conference papersThis paper reviews how simultaneous application of three basic elements reduces the methane explosion hazard at coal mine working faces: (1) adequate ventilation, (2) regular monitoring of gas concentrations, and (3) elimination of ignition sources.
Prediction of Longwall Methane Emissions and the Associated Consequences of Increasing Longwall Face Lengths: A Case Study in the Pittsburgh Coalbed6/1/2006 - Conference papersNIOSH conducted a study with the goal of characterizing methane emissions from increasing face lengths in the Pittsburgh Coalbed and providing a method of predicting emissions increases from longer faces and of planning for more methane control.
6/1/2006 - Conference papersNIOSH conducted a longwall methane emission and mining time study at a Pittsburgh Coalbed mine to predict emissions from a longer face, and developed and applied mathematical formulas and constants to characterize four emission contributors.
1/1/1994 - Information CircularsThis paper describes the history and technology of methane drainage in the US and other countries.
1/17/2020 - Research areasMethane is an odorless, tasteless, colorless, lighter-than-air gas formed by the decomposition of organic and other carbonaceous materials. From 5% to 15% can form an explosive mixture which, if ignited, can have catastrophic consequences.
1/29/2019 - Research projectsA project to improve the capabilities to detect changing ventilation conditions along a longwall face arising from poor roof caving characteristics and increasing face length.
3/1/2018 - Peer reviewed journal articlesAn article about a study to analyze production performances of gas gov ventholes drilled over a longwall panel as a methane control measure.
1/23/2018 - Research areasVentilation Topic Page
Cross Formational Flow of Water into Coalbed Methane Reservoirs: Controls on Relative Permeability Curve Shape and Production Profile3/1/2017 - Peer reviewed journal articlesThis article by NIOSH investigates the impact of water flow from an external source into coalbed on production performance and also on reservoir variables.
10/22/2016 - Research projectsA project to enhance worker safety by decreasing the likelihood of explosions that are produced by hazardous underground methane concentrations.