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| DYNAMIC MECHANISM OF WATER INRUSH FROM FLOOR OF MINING FACE |
| HU Weiyue1，YIN Shangxian2 |
(1. Xi¢an Branch of China Coal Research Institute，Xi¢an，Shaanxi 710054，China；
2. Northern China University of Science and Technology，Beijing 065201，China)
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Abstract Stress distribution and its change regulation in floor rock mass of mining face with mining progress are analyzed in theory and the theory analysis results are proved by vertical stress in roof and floor of mining face which are measured and detected in boreholes with mining process. The change regulation of rock permeability in floor of mining face are tested in boreholes with mining progress. The relationships among mining，rock stress and water inrush from floor of mining face are studied. It is understood that there is a 0–20 m distance tensile stress area in floor rock of mining face and this area process with mining progress. The permeability of rock mass in tensile stress area is much bigger than other parts and it is easier to induce water inrush from floor of mining face.
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Received: 14 January 2009
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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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