Analysis on Roof and Floor Water Inrush Hazard in Main Mining Seam in Hongzhuan Coal Mine
WEN Yu
GAO Min
LUO Kangcheng
Abstract：It was inferred that the Changxing formation within the coal field was the medium karst aquifer and the Maokou formation was the strong karst aquifer according to the hydro-geological conditions of Hongzhuan Coal Mine. The roof water inrush hazard of C1 seam was analyzed by using the calculation method of the height of the roof caving zone and water-flowing fractured zone, and the floor water inrush hazard of C10 seam was analyzed by using the safe water-resisting layer thickness in the floor and the water inrush coefficient method. The results showed that when C1 seam within the coal field was extracted, the aquifer in roof Changxing formation posed water inrush threat to this seam;when C10 seam was extracted, the strong aquifer in Maokou formation did not pose water inrush threat to this seam in the normal area with the coal seam elevation of above +800 m due to the water-resisting action of Emei Mountain basalt in the floor. In addition, each coal seam on the upper side was closer to the Maokou formation due to the action of F3 , F4 and F8 within the mining area, this may lead to the water inrush hazard when the coal seam near the fault was extracted.
Keywords：coal mine water disasterwater filling factorswater inrush hazardwater inrush coefficient
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 73-75,78 )