Study on stability of underground rock mass in Shirengou iron mine based on microseismic monitoring

In the productive process of first phase and second phase of underground mining in the Shirengou iron mine, crisscross distribution of gob areas caused by illegal mining leading to surrounding rock stress distribution is very complicated. Stolen mining and normal mining induced more serious rock destruction. The implementation of third phase production makes mining rock geological conditions worsen. There are many gob areas in this area. In order to ensure the normal operation of filling station and the successful implementation of third phase in the Shirengou iron mine, based on the seismic monitoring technology, microseismic activity rule of underground rock mass near 17 exploration line was studied by analyzing and clustering waveforms and comparative analysis with stress field. The researches show that fracture concentration areas were formed between the gob areas for more development of local fractures in underground rock mass near 17 exploration line.