Practice of exploration and discharge technology of roof water in deep Jurassic coal seam: with Hu Lusu coal mine in Hujiert mine area as example

The sedimentary type of roof aquifer of the deep Jurassic coal seam is mainly fluvial deposition in Hujiert mine area.Although the tectonic conditions are relatively simpleand the hydraulic connection betweenthe main water-bearing stratumwith the Cretaceous and unconsolidated layersaquifers is weak. Butthe space combination relations and structures of the aquifers and aquifugesarevery complex and the water yield propertyis very inhomogeneous. According to the above characteristics, Studied the spatial distribution of typical mineaquifer by the method of sedimentary geology. Identified, located and delimited the Zhiluo aquiferwhich is mainly filled with water in the mine, and delineated the water-rich zone of the sedimentary sand body and it was verified by the practice of underground exploration and drainage water.