Water preventing method for mine in structure of thin base rock and thick loose aquifer

This invention relates to a water-proof method in thin basic rock loosening water-bearing layer mine, which comprises the following steps: a) bridging pumping hole/well, continuous passing drain hole and water level observation hole in acting surface; b) bridging constructing drain drill hole in two sides of the acting surface; c) increasing constructing forced drain hole in the acting surface along the slot; d) digging slip casting hole in the place with thick loosening soil, slip casting and fixing sand; e) setting drainage tube in the valley bottom, digging seepage control ditch. By said invention, it can avoid the influence of the mine water to the dislodging surface, decreasing water inrush accident.