Assessment of the efficiencies of auxiliary ventilation systems using empirical methods

Abstract zation of underground mines have led to the production of large amounts of gaseous and particulate contaminants. Over 100 000 lives have been lost due to methane gas and dust explosions in coal mine workings in both the United States and Canada since 1900. There is, therefore, the need to constantly assess and evaluate the performance of existing mine ventilation systems to maintain safe and acceptable mine environmental conditions. This paper advances research initiatives in the control of methane gas in underground mine environments. It uses the results of continuous monitoring of methane gas concentrations conducted in selected coal mines in North America to assess the effectiveness of existing auxiliary ventilation systems to control methane gas concentrations. The results show that the average quantities of fresh air required to dilute, disperse and remove methane gas concentrations within set levels of one minute varied from 5.43 m3/sec. to 27.97 m3/sec. in the development headings. The average dilution times in the headings studied were less than eight minutes. The calculated dilution eff
Keywords: Underground mining, Auxiliary ventilation systems, Methane gas, Air flow
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Summary: An index to evaluate the amenability for processing of different coals is implemented. The index is based on the well-known Mayer-curve or M-curve. The index is superior to other existing indices and is implemented using Microsoft-Excelª. Several coals are used to demonstrate the implementation of the index proposed.
Publication: CIM Bulletin
Author(s): A.I.A. Salama, N. Wang
Keywords: Coal processing, Characteristics index, M-curve
Issue: 1054
Volume: 94
Year: 2001
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