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- Mine locations, excavations, and structures:
- Underground
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- Tunnels
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- Pillars
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- Yield pillars
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- Barrier pillars
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- Chain pillars
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- Web pillars
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- Returns
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- Escapeways
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- Gobs
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- Airways
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- Bulkheads
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- Intersections
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- Longwall panels
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- Headgates
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- Recovery rooms
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- Tailgates
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- Entries
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- Bleeder entries
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- Intake entries
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- Panel entries
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- Belt entries
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- Drifts
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- Ore passes
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- Ore chutes
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Results 21 - 30 of 201
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2/1/2005 - Conference papersHighwall stability remains a major concern during highwall mining. Geologic structure (hillseams) and pillar stability are the two major factors affecting highwall stability.
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8/1/2003 - Conference papersThe advance-and-relieve method benefits from lateral destressing. Numerical modeling proved useful in studying the basic mechanics of lateral relief while investigating the sensitivity of results to different parameters using controlled experiments.
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2/1/2001 - Conference papersEvaluation of the "Advance and Relieve" mining method is described to determine effectiveness for conditions where high horizontal stresses caused long running roof falls resulting in hazardous conditions and the premature abandonment of panels.
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1/1/2000 - Conference papersThe practical application of the "advance and relieve" method is discussed. A trial of the method was conducted for a room and pillar coal operation that was experiencing roof cutters and long running roof falls caused by high horizontal stresses.
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1/1/1991 - Reports of InvestigationsThis report details the results of a series of large-scale experiments where small coal fires were used to ignite the conveyor belt at specific air velocities, and showed conditions required for early detection of conveyor belt entry fires.
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1/13/2023 - Research projectsA project to build the framework for expanding pillar design criteria into challenging environments by undertaking pillar response investigations in representative conditions at case study mine sites.
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1/1/2020 - Peer reviewed journal articlesThe article presents seven cases of conventional gas wells within chain pillars and discusses how numerical modeling can provide a more quantifiable approach to assess the stability of the gas wells.
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1/1/2020 - Peer reviewed journal articlesAn article detailing observations of the non-typical bleeder entries of a moderate depth longwall panel, with a primary focus on the extent and magnitude of the abutment loading.
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12/1/2019 - Peer reviewed journal articlesAn article describing a field study conducted to understand the role of gas dynamics in variable broken rock, as well as investigate airflow exchanges between the face and gob.
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12/1/2019 - Peer reviewed journal articlesAn overview of recent trends in US longwall mining, with an emphasis on accident and injury trends, as well as support systems and ground conditions.
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Content source: National Institute for Occupational Safety and Health, Mining Program