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Showing 1 to 7 of 7 for “"Underground Mine Ventilation"”.
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Air leakage in underground mine ventilation
Air leakage in underground mines is the most common cause of inefficient distribution of ventilating air. Depending upon various factors, more than half of the fresh air entering a mine short-circuits to the return airways before reaching the working faces. Consequently, large leakages create an …
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Application of Background Oriented Schlieren (BOS) in Underground Mine Ventilation
… flows has significant implications for analyzing underground mine ventilation systems. Currently, the widely utilized traditional schlieren methods are impractical underground due to complex equipment and design requirements. Background oriented schlieren (BOS) provides a solution to this problem. …
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A detailed justification for the selection of a novel mine tracer gas and development of protocols for GC-ECD analysis of SPME sampling in static and turbulent conditions for assessment of underground mine ventilation systems
… a powerful means of assessing air quantity in underground mine ventilation circuits. The execution of a tracer gas style ventilation survey allows for the direct measurement of air quantity in locations where this information is otherwise unattainable. Such instances include inaccessible …
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Development and Evaluation of a Permeation Plug Release Vessel (PPRV) for the Release of Perfluoromethylcyclohexane (PMCH) in Underground Mine Tracer Gas Studies
… hexafluoride (SF6) as a tracer gas for analyzing underground mine ventilation systems has been practiced for over 30 years. As a result, the methods used to release, sample, and analyze SF6 are well accepted. Although improvements are still being made to enhance the analysis of this tracer, the …
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Development of a remote analysis method for underground ventilation systems using tracer gas and CFD
Following an unexpected event in an underground mine, it is important to know the state of the mine immediately to manage the situation effectively. Particularly when part or the whole mine is inaccessible, remotely and quickly ascertaining the ventilation status is one of the pieces of essential …
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Towards Estimating Friction Factors of Mine Drifts from Low Density Point Clouds
… for estimating roughness for the purposes of underground mine ventilation planning is to choose values found in a variety of textbooks that attempt to match the excavation type. These values are then used in the Atkinson equation made popular in 1935 by McElroy to determine pressure drops and …
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Approaches to Simulation of an Underground Longwall Mine and Implications for Ventilation System Analysis
Carefully engineered mine ventilation is critical to the safe operation of underground longwall mines. Currently, there are several options for simulation of mine ventilation. This research was conducted to rapidly simulate an underground longwall mine, especially for the use of tracer gas in an …