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For the purpose of achieving more accurate and reliable gas emission dynamic prediction through effective analysis of gas measuring data in mines, this paper put forward a method that use ant colony clustering to optimize El-man neural network. Ant colony clustering algorithm was merged with Elman neural network to optimize weight and threshold. The model of gas emission quantity prediction was established by ACC-ENN algorithm, with the historical data of mine actual monitoring to experiment and analysis. The results show that the Elman neural network model optimized by ant colony clustering than other prediction model has better generalization ability and higher precision of prediction, to realize the dynamic forecast of gas emission effectively. [ABSTRACT FROM AUTHOR]