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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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