Research on 110 Method Technology of Ultra Kilometer Deep Well Based on Microseismic Monitoring

Anju Coal Mine 5307 working face main mining 3 coal seam, buried depth of more than kilometers. In order to realize roof cutting, pressure relief and automatic roadway mining without coal pillar in a kilometers deep well, namely the ‘110 method ’, taking the 5307 working face of Anju Coal Mine as the engineering background, the ‘ 110 method ’ and the ‘ 121 method ’ are adopted for the track and belt roadways of the 5307 working face respectively, and the distribution of microseismic events in the field is analyzed. It is found that the number of microseismic events in the 5307 track roadway is significantly less than that in the belt roadway, and the energy released by the vibration is also reduced. The mining speed of working face also has influence on microseismic events. The faster the mining speed, the higher the frequency and energy of microseismic events.