Study on Catastrophic Mechanism of Water-inrush From Coal Floor

摘要

In the paper, a cusp catastrophic model of water-inrush from coal floor is established, and water-inrush mechanism of coal floor destruction is analyzed. The ratio, I_P, of water pressure to stress can be derived from the model. When I_P > 1, water-inrush from coal floor can be caused. When I_p > 1 water-inrush from coal floor can not be caused. The analysis of actual examples indicates that a cusp mode is used to describe developing regularity of the ratio of water pressure to stress is suitable, and to predict water-inrush from coal floor is exact.