Abstract: The formation conditions of ground pressure disaster activities are very complex，and the warning effect of single index is not ideal. Based on the microseismic monitoring system data of a mine construction，the early warning system of ground pressure disaster activity is studied from the three perspectives of ′time，space and strength′ of microseismic monitoring events，and the quantitative grading early warning evaluation is carried out in combination with the actual ground pressure activity of the mine. The results show that the multi-index early warning system technology and the hierarchical early warning method are better in the practical application process，which can more accurately reveal the process and evolution trend of mine ground pressure disaster.

Key words: ground pressure disaster, multi-index grading early warning, safety in production