Abstract: To get effective management of water-inrush from backplane fault in Huaibei mining area，different measures are taken for different fault situations. Fault dip and coal permeability influenced by fault were fully considered on coal pillar design and hydraulic connection between the aquifers also considered on grouting and water drainage. Research and practice showed that the coal pillar preserve is more scientific and reasonable after considering the fault dip and coal permeability influenced by fault，compared with the traditional coal pillar design. The fault dip of 60° at Fault F2 of Taoyuan Mine is the critical angle. For security，backplane monitoring should be strengthened after preserving the coal pillar to prevent from and treat water inrush caused by fault. The drainage tests before grouting can better understand the hydraulic connection between the aquifers and play a guiding role in grouting. Engineering practice in Zhuzhuang mine and Yangzhuang mine also shows that grouting has a remarkable effect on preventing water-inrush caused by some minor faults.

Key words: Water-inrush, Fault, Limestone water, Coal pillar, Effective confining zone, Grouting