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- Geologic conditions and events:
- Faults
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- Earthquakes
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- Subsidence
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- Gas emissions
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- Slips
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- Landslides
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- Clay veins
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Results 31 - 40 of 79
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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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6/1/1999 - Conference papersVarious methods of monitoring slip movements on bedding planes, as well as examination of rock burst damage in stopes, suggests that rock bursts in the Lucky Friday Miner are closely associated with these movements.
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3/1/1999 - Conference papersThis paper presents several case studies in which a mechanics-based boundary-element program is used to back-calculate the surface subsidence associated with various panels at several northern Appalachian coal mines.
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3/1/1999 - Conference papersAn investigation of an underground pillar at a mine in Lead, SD. Using the results, researchers hypothesize that pillar rocks have the ability to withstand stress an order of magnitude greater than they currently sustain.
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1/1/1999 - Conference papersVarious methods of monitoring slip movements on bedding planes, as well as examination of rock burst damage in stopes, suggest that many rock bursts in the Lucky Friday Mine are closely associated with these movements.
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6/1/1998 - Conference papersHistorically, the surface subsidence over underground coal mines has been predicted using empirical profile or influence functions which have little or no connection to the actual mechanics of the subsidence. This paper presents a case study where a me...
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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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11/1/1997 - Technology NewsThe use of seismic tomography to identify geologic hazards in underground mines is discussed.
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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