Shelly, D. R., Peng, Z. G., Hill, D. P. & Aiken, C. Triggered creep as a possible mechanism for delayed dynamic triggering of tremor and earthquakes.
The effects of the superposition of tremors' dynamic disturbance with static stress on rockburst are mainly manifested as following three situations: (1) High static stress ((sigma_{text{s}})).
Peng, Z., Shelly, D. R. & Ellsworth, W. L. Delayed dynamic triggering of deep tremor along the Parkfield-Cholame section of the San Andreas Fault following the 2014 M6.0 South Napa earthquake.
However, due to the high energy released by far-field mine tremor, the dynamic stress converted from the tremor source to the coal mass show high instantaneous increment.
Here, the instantaneous dynamic disturbance of mine tremor plays a dominant role in the burst failure process.
Equation (4) indicates that rockburst is prone to being induced in case of the total stress (due to superposition of static stress in the coal and dynamic stress induced by tremors) exceeding the critical stress.
In this case, the dynamic stress induced by mine tremor plays an inducing role in the coal rock failure.
Examination of fault rocks exhumed from various depths in subduction zones is essential in order to understand fault slip behaviors such as dynamic earthquake rupture, low-frequency tremor and earthquakes, slow slip events, and post-seismic and interseismic creep.
In case of the low static stress in coal rock and the low dynamic stress triggered by mine tremor, while the physical mechanical properties of the surrounding coal rocks change suddenly, rockburst may also be caused.
The expressions of the static stress induced by coal mining and dynamic stress induced by mining tremors were obtained.
