PREDICTION OF GAS OUTBURST IN A COAL MINE BASED ON SIMULTANEOUS PRESTACK SEISMIC INVERSION: A CASE STUDY IN CHINA

摘要

In deep mines, gas outburst accidents can result in serious coal mine safety and economic loss, which means extraction of coal from the deep strata can be a critical problem for industry energy in China. Based on the differences in the physical properties between deformed coal and original bituminous coal, this paper shows the results in different seismic attributes: acoustic impedance, elastic impedance, μ~*ρ and λ~*ρ from prestack seismic data, and suggest that they can be used to assess the distribution of deformed coal. Our results show that the gas outburst associated with the distribution of deformed coal can be reliably predicted. We conclude that the prestack seismic attributes provide a new way of effectively assessing potential risks of gas outburst in mining operation, and may therefore be practically used in the large-scale development of coal bed methane resources.