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STUDY ON PREDICTION OF WATER-INRUSH FROM COAL FLOOR
BASED ON CUSP CATASTROPHIC MODEL |
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Abstract When the water-pressure in floor stratum exceeds the floor strength after coal mining，the floor collapses and water-inrush from coal floor occurs. This phenomenon can be tackled by catastrophe theory. 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 of water pressure to stress， can be derived from the model. When ＞1，water-inrush from coal floor may occur. When ＜1，no water-inrush from coal floor occurs. The analysis of actual examples indicates that a cusp model is appropriate to describing the development of the ratio of water pressure to stress，and the prediction of water-inrush from coal floor is pertinent.
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Received: 10 August 2001
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LI Botao1, 2, 3, TAN Yuxuan1, LIN Haifei4, 5*, WEI Jianping1, 2, 3, ZHANG Hongtu1, 2, 3, LI Shugang4, 5, WEI Zongyong4, 5, WANG Pei4, LUO Rongwei4, LIU Yanwei1, 2, 3. Mechanical properties and mesoscopic damage evolution of coal under liquid-nitrogen freezing at different initial temperatures[J]. , 2026, 45(6): 1757-1772. |
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