Safety Evaluation of Mining Under-group Coal Seams above High Confined Karst-water in Deep Level
MA Jie
Abstract：Combining with drilling data, pumping test results, fracture statistic of floor aquifuge and water burst?ing source recognition, this paper analyzed occurrence characteristics of taiyuan group's 1st and 2nd thin-bedded limestone, evaluated water-resisting ability of floor aquifuge, identified the source of inrush-water in Ⅱ1016 coal face.The results shows :1)By using fisher discrimination analysis method, the source of water irruption is limestone water.2)From 1st limestone to 2nd limestone of taiyuan group, the thickness of every single layer is thick?ening ,the water abundance is increased, however, seen as one aquifer of taiyuan group, its water yield property shows a weakening tendency.3)The thickness of aquifuge between the bottom of 10th coal and the top of 1st lime?stone is stable, and its crack development and water abundance are weak.
Keywords：deep levelkarstic fissure wateraquifugesource of inrush-water
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 49-51 )