Cause Analysis and Control of Water Inrush When Mine Inclined Shaft Passed Through Syncline Structure

Abstract：According to the water inrush occurred when the mine auxiliary shaft excavated at the crack developed syncline axial section,the water inrush quantity was about 120 m3/h and the water inrush caused a serious problem to the mine inclined shaft construction.Firstly according to the hydrological conditions and the water inrush features,the paper analyzed and determined the water inrush source and water inrush channel,individually as the Taiyuan Group limestone water and the crack developed zone of the Xigou syncline axial section.Then according to the Xigou syncline,the crack development of the limestone was the features of the structure watery zone.Taking the diversion hole for water drainage—grouting for water sealing—pregrouting for water prevention as the water prevention and control idea,the grouting to seal the water outlets at the coal mining face,the pilot water detection and the pregrouting combined control alternative was applied.Finally the checking hole drilling and transient electromagnetic pilot detection method was applied to inspect the grouting effects.After the mine inclined shaft excavated,some roof area of the inclined shaft would have raining phenomenon.The water inrush quantity was 3～4 m3/h.The grouting sealing effect was obvious.