Theoretical and Experiment Study on Vadose Conversion of Water Inrush Later Occurred from Structure Broken Zone

In order to reveal the inherent mechanism of a large water inrush later occurred from the structure broken zone in a mine and to seek the control theory and the experiment bases, based on the collection of the mine typical fault and sink hole late type water inrush cases and the analysis of the features, a water inrush si mulation experiment from structure broken zone under a high water pressure was designed and conducted.The variation curves of the flling material inrush quantity an d the water inrush quantity with the time were obtained from the different flling material type structure broken zone under the water pressure of 15 MPa.It was found tha t when the water pressure was low, the water inrush quantity from the structure broken zone would be no big variation with the time passed and when the water pressur e was high, the water inrush quantity would have a feature of small quantity to high quantity process.The theoretical analysis showed that the water inrush from the stru cture broken zone under the high water pressure condition would be a conversion process of the " pore flow to crack flow to pipeline flow" with the inner composition str ucture variation.The vadose conversion would be the inherent mechanism of the late type water inrush from the structure broken zone.The treatment and control of the I arge water inrush from structure broken zone would be a process to reform the pipeline and crack structure to the pore medium and till no permeability zone.