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Abstract
Liquid intervention is an effective method for improving the coal/gangue recognition accuracy in longwall top coal caving mining, especially for coal and gangue with small gray difference. In this study, the influence of the Secondary Intervention (SI) on the accuracy of coal/gangue recognition is considered, and a series of experiments of coal/gangue recognition with First Intervention (FI) and SI were carried out. The results showed that with the increasing water volume, the temperature difference between coal and gangue under FI is far greater than that under SI. It is concluded that the “subtract background + binarization” image processing method is the best, and its average recognition accuracy under FI reaches 92.41%, and that of SI is 82.44%. Moreover, the liquid volume of SI needs to be reasonably selected to achieve high recognition accuracy for coal and gangue with small gray difference.
Published Version
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