| Application of key-stratum-theory in water-preserved mining is analyzed under the guidance of green mining.Concepts of bearing-key-stratum,water-preserved-key-stratum and seepage-key-stratum are illustrated.The relationships among the three kinds of key-stratum are discussed with examples.Based on analyzing the dynamic systems of coupling between the deformation of the strata and the seepage in the strata,a primary thinking to explain the water-inrush mechanism by the complicacies science is presented.The research shows that,before the breaking of bearing-key-stratum,it is also water-preserved-key-stratum;after the breaking,the bearing-key-stratum can not preserve water any more,and the seepage-key-stratum then serves as the water-preserved-key-stratum;when bearing-key-stratum and seepage-key-stratum were broken,water inrush occurred.The dynamic system,in which the deformation of strata and the seepage in strata interact,is a system that posses complicacies such as variable boundaries non-linearity,heterogeneity,and non-continuity.If put dynamies of complex systems into the study and application of water-inrush control research,the process of water-inrush can be desribed. |