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Abstract: |
Water-inrush in coal floor affect the safety of coal mine seriously. There are few models evalueing the maximum water inrush quantity in coal floor, most of the models start from the standpoint of the characteristics of pipe flow, due to the difficulty of water inrush passage confirming, it’s difficult to determine the maximum water inrush quantity accurately. This may result in the waste or failure of water control project. In this paper, basing on the rock deformation theory, considering the maximum permeability through the process of the rock deformation in the coal floor, analyse the comprehensive permeable ability within a certain range of the combination of rock in coal floor under the influence of water pressure in the aquifer. Under the consideration of the radius of the influence from the water inrush, have a simulation of the process of rock deformation by the rock mining, according to the different mining stage, the permeability of the water-resisting rock in different stress states and the permeability of the water-bearing rock in different stress states. And establish a model to predict the maximum water inrush quantity based on the process of rock deformation, to guide the construction of water control projects before mining, and avoid the waste caused by excessive investment evaluation at the same time.
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