Abstract: In this paper，in view of the serious conditions of ground pressure (rock burst，etc) appeared in Hongtoushan copper mine，we established a microseismic monitoring system in the mine，and analyzed the relationship between the microseismic activities and mining operation，and the spatial distribution of microseismic events，applied the energy index and apparent volume to forecast the occurrence of large scale rock fracturing．The location results using manual fixed-point blasting show that the location error of microseismic monitoring system is less than 10m，which suggests that the system can reach the requirement for ground pressure disaster monitoring in mine．Microseismic activities can be divided into two quiet periods and three active periods．There exits the incubation and early-warming periods before the large scale rock fracturing．The quick drop of energy index and the continuous increase of apparent volume can be used as the precursory characteristics of rock burst and large scale rock fracturing．Through the cloud charts of energy index and displacement，the potential danger areas of ground pressure disasters can be judged，which can be used to guide the safety management and ensure safety production in deep mine．

Key words: deep mine, ground pressure, microseismic monitoring, energy index, apparent volume