Review of Methane Emission and Prediction Research in Longwall Coal Mines
There are a number of current theories in relation to methane migration and emission into workings following underground coal mining activity and some controveries do exist. Mining causes changes in the stress regimes in surrounding strata and results in fracturing. Permeability increases and methane flows into workings under a pressure gradient. The effects of stress on permeability depend on the physical properties of the coal and surrounding strata. Methane emission also depends on the original methane content and the proportion which will be liberated. There are several methods for determining in situ methane content and desorption characteristics of coal samples and several methane prediction methods bus clearly more research is necessary to achieve an adequate predictive model.
B. Jensen et al., "Review of Methane Emission and Prediction Research in Longwall Coal Mines," AusIMM Proceedings, Australasian Institute of Mining and Metallurgy (AusIMM), Jan 1992.
Mining and Nuclear Engineering
Keywords and Phrases
Coal Mining; Fracturing; Methane
Article - Conference proceedings
© 1992 Australasian Institute of Mining and Metallurgy (AusIMM), All rights reserved.