Study on disaster-causing factors and evolution process of rock burst in roadway near gob

In order to study the causes and laws of the multiple mine earthquake induced shocks in the gob area of I010203, the ARAMIS M/E microseismic monitoring system, PASAT-M portable seismic monitoring system and impact ground pressure stress monitoring system are used for real-time monitoring, through the analysis of geological and mining factors, the six influencing factors were determined. According to the coal stress monitoring data, the monitoring data of the support pressure and the microseismic monitoring data, the concentration and evolution process of the coal body stress during the mining process of I010203 working face were analyzed and the working surface cycle was studied. The evolution process of microseismic activity during the period of working face cycle, fault zone and lateral roof was studied, and the weak shock caused by a mine shock occurred during the mining period was also analyzed. In the case study, the PASAT-M portable microseismic monitoring system was used to detect the weak impact area. According to the results of comprehensive monitoring and analysis, the relationship between coal body stress and surrounding rock activities and the disaster-causing process were discussed. The causes and laws of mine-induced earthquake induced impact of I010203 working face were determined. The results show that I010203 working area faces high stress concentration in the gob, the physical side reaches 2.05～8.59, and the coal pillar side reaches 1.76～3.16. The high static load formed by the superposition of mining and tectonic stress is close to or reaches the impact pressure of coal body. Critical stress, fault, lateral roof structure and roof cycle breaking are the main factors affecting the occurrence of mining earthquakes. The static load with high concentration provides easy-to-satisfy stress conditions for impact disasters, working face pressure, fault, lateral roof structure. The sudden release of energy of structure induces occurrence of large-energy mine earthquakes, and the dynamic load form is transferred to stope space, so that the coal body near the critical or critical stress condition is further raised to the critical condition where the rock burst pressure occurs, thereby inducing the impact.