- Mine locations, excavations, and structures:
- Tunnels
Results 1 - 9 of 9
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10/4/2019 - Peer reviewed journal articlesThis paper reports the influence of antennas on radio signal propagation in tunnels and underground mines.
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5/1/2017 - Peer reviewed journal articlesAn article that discusses how wall roughness affects radio propagation in tunnels, and presents a unified ray tracing and modal method for modeling radio propagation in tunnels with rough walls.
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7/19/2016 - Contracts and cooperative agreementsA contract to simulate the development and evolution of natural gas (NG) explosions in mine tunnels.
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1/1/2010 - Conference papersThis paper describes two algorithms that can provide greater accuracy for underground miner tracking systems.
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4/1/2005 - Peer reviewed journal articlesDiscusses a study that used a CFD program (fire dynamics simulator) based on large eddy simulations (LES) to model floor-level fires in a ventilated tunnel. The CFD results are compared with two simple theories of critical ventilation.
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2/1/2002 - Conference papersSteel liner plates are used to provide protective linings in the tunneling industry. This report summarizes test results, examines design parameters that impact jacking force capability, and develops models to improve design load prediction.
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6/1/2001 - Conference papersIn the present study, a computational fluid dynamics (CFD) program is used as a design tool to model floor-level fires in a ventilated tunnel.
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1/1/1979 - Contract reportsThis report presents a mathematical model for the propagation of UHF radio waves in the large cross section tunnels of a room-and-pillar limestone mine and describes the analysis of a small amount of propagation data obtained. The model and analysis is ...
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9/1/1978 - Contract reportsThis report describes the feasibility test of an electromagnetic method for locating boreholes, with or without casing, that have been drilled in conjunction with mining operations but without precisely known locations with respect to the tunnel.