Mechanism of water inrush from coal seam floor based on coupling mechanism of seepage and stress

Under the environment that the safety problem of coal mining is becoming more and more serious, research on coal seam has become one of the hot topics. Among them, the water inrush from coal seam floor is one of the main threats to coal mine safety. Based on this, the mechanism of water inrush from coal seam floor was revealed by the coupling of seepage and stress and the variation regularity of permeability of rock during the whole stress-strain process was analyzed, and the effects of confining pressure and osmotic pressure on permeability were studied and the dynamic evolution models of rock permeability and the equation of permeability and volume strain were established. The permeability and failure process of rock were analyzed and rock engineering system (ORES) method was proposed. The seepage stress coupling mechanism of coal seam floor was analyzed and the governing equations of seepage stress coupling of coal seam floor were constructed. Hebei Xingtai North wells in Dongpang Coal Mine 9208 working face water inrush examples were analyzed. This study can provide technical support for the analysis of coal seam floor water disaster and the treatment of water inrush.