Abstract: Aiming at the deficiency of fine exploration technology and equipment of hidden water conducted structure, it used underground high-precision microseismic monitoring system to carry out 3D continuous dynamic monitoring for rock fracture law and tectonic activation in the mining process. Combined with the spatial structure theory of stope overlying strata, it conducted water inrush monitoring and early warning. The engineering practice proved that microseismic monitoring could accurately judge the rock fracture range of working face, anomalous areas of rock movement, it established the quantitative description model based on positioning results and rock fracture field, this technology could accurately realize the advance warning and forecast for water inrush monitoring.