Optimization of drainage system of extension in threatened mine by water
Lu Fu - qiang; LIU Hong - jun (Fangezhuang Mining Co. of Kailuan Group, Tangshan 063109, China)
Some problems in the drainage options on the shaft of the extended level (No. 3 level)in the Fangezhuang Coal Mine threatened by water are analysed. Introduced is the thinking,method and effect on the optimization of it,replacing the traditional shaft drainage by inclined shaft drainage, which decreases the investment in the project and improve the water - resistent ability.