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Assessment of Microseismic Events via Moment Tensor Inversion and Stress Evolution to Understand the Rupture of a Hard–Thick Rock Stratum

Urheber*innen

Song,  Jie-Fang
External Organizations;

Lu,  Cai-Ping
External Organizations;

/persons/resource/zang

Zang,  Arno
2.6 Seismic Hazard and Risk Dynamics, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Zhang,  Xiu-Feng
External Organizations;

Zhou,  Jian
External Organizations;

Zhan,  Zhao-Wei
External Organizations;

Zhao,  Li-Ming
External Organizations;

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Zitation

Song, J.-F., Lu, C.-P., Zang, A., Zhang, X.-F., Zhou, J., Zhan, Z.-W., Zhao, L.-M. (2024 online): Assessment of Microseismic Events via Moment Tensor Inversion and Stress Evolution to Understand the Rupture of a Hard–Thick Rock Stratum. - Rock Mechanics and Rock Engineering.
https://doi.org/10.1007/s00603-024-04066-3


Zitierlink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5027684
Zusammenfassung
We evaluated the spatiotemporal evolution of microseismic (MS) sources generated by multiple fracturing of a hard and thick Jurassic rock stratum in the 93upper24 working face of the Nantun coal mine, China. Moment tensor inversion, stress field analysis, velocity tomography, and stress inversion were used to reveal individual rupture types and the failure process of the hard rock stratum in the working face during the mining operation. We simulated the change in Coulomb stress before and after the occurrence of mining-induced tremors, and analyzed its impact on the stability of the surrounding rock close to the working face. Our results demonstrate that the static Coulomb stress change computation is an efficient tool to predict the evolution of subsequent MS events patterns. The outcome of this work allows to identify and better understand the failure mechanism within a hard and thick Jurassic rock stratum during the mining operation, and can be an interesting approach in improving mine safety in similar environments.