A Source Mechanism of the Mining-Triggered Tremor in the Xinjulong Coal Mine Revealed by the Bayesian Inversion and 3D Simulation

Mining-triggered tremor is an important factor that restricts the safe production of coal mines. Studying the occurrence mechanism of these tremors is integral to preventing and controlling rockbursts. This study jointly uses Bayesian full-waveform inversion and simulation to determine the relationship between roadway layout, syncline, and rockburst accidents in the Xinjulong coal mine. Field investigations verified that the static stress transfer caused by event #14 triggered the occurrence of a rockburst. Moreover, the stress and displacement field changes caused by sources with different friction coefficients and depths were discussed. The results show that (1) a shear rupture was observed after event #14, and the fault type was strike–slip. (2) Meanwhile, a stress-increase zone appeared at both ends of the fault plane, and the roadway in this zone was prone to rockburst risks. In addition, there are stress-increasing and decreasing zones on both sides of the fault plane. (3) With the increasing friction coefficient ( μ^i ), the stress and displacement near the fault plane increase slightly. When the source was less than 60 m away from the roadway, its stability was mainly affected by event #14. When the distance is more than 60 m, it is mainly affected by the Liuhai syncline, which can reveal the mechanism of rockbursts triggered by strike–slip tremors and provide a reference for preventing rockburst disasters.