Mining Induced Seismic Event on an Inactive Fault

Lizurek, Grzegorz; Rudziński, Łukasz; Plesiewicz, Beata

doi:10.2478/s11600-014-0249-y

Cited by 38 publications

(35 citation statements)

References 21 publications

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“…1), LGCD, Poland. The seismic event was reported as possibly triggered on an inactive fault, which was well recognized by a mining geological survey (Whidden et al, 2013;Lizurek et al, 2014). The Rudna mining geophysical survey located the event within the Rudna mine complex, with epicentral coordinates 51.49°N, 16.08°E, depth 1.0 km, and origin time 21:09:51.9 UTC (E. Koziarz, personal comm., 2013).…”

Section: Introductionmentioning

confidence: 83%

“…In the present study, we investigate the complexity of the rupture process of the 19 March 2013 mining-induced seismic event by comparing MT inversion setups at local and regional distances and improving upon previous results obtained only upon the analysis of local data (Lizurek et al, 2014). The com- Lizurek et al (2014) first hypothesized that the Rudna event in March 2013 is characterized by a complex rupture.…”

Section: Introductionmentioning

confidence: 89%

“…However, Poland is faced with a relevant human-induced seismicity, especially linked to hard coal (e.g., Stec, 2007), brown coal (Wiejacz and Rudziński, 2010), and copper mining (Lizurek et al, 2014). Copper-mining-induced seismicity is commonly observed in southwestern Poland, at the Lubin-Głogów Copper District (LGCD).…”

Section: Introductionmentioning

confidence: 99%

“…The IGF PAS estimated a local magnitude M L 4.2 and moment magnitude M w 3.7 (seismic moment of 3:6 × 10 14 N·m ). The event was widely felt in the surrounding area (Lizurek et al, 2014) and was responsible for a rockburst. In consequence of this rockburst, 19 miners were trapped in the mine, all of them being successfully rescued some hours later.…”

Section: Introductionmentioning

confidence: 99%

“…The com- Lizurek et al (2014) first hypothesized that the Rudna event in March 2013 is characterized by a complex rupture. The location of the hypocenter, at some distance from the excavation room, ruled out that it was directly induced by the ongoing mining processes.…”

Section: Introductionmentioning

confidence: 99%

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Complex Rupture Process of the 19 March 2013, Rudna Mine (Poland) Induced Seismic Event and Collapse in the Light of Local and Regional Moment Tensor Inversion

Rudziński¹,

Cesca²,

Lizurek³

2016

Seismological Research Letters

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On 19 March 2013, a strong, shallow, induced seismic event struck a mining panel in the room-and-pillar Rudna copper mine in southeastern Poland. The event caused important damage at the mining tunnel and trapped 19 miners, who were safely rescued a few hours later. Although mining-induced seismicity is frequent at this mine, the 19 March event was unusual because of its larger magnitude, its occurrence far from the mining stopes, and because it was accompanied by a strong hazardous rockburst. The mining inspections following the event verified the occurrence of a rockfall with tunnel floor uplift but also recognized the presence of a faulting structure at the hypocentral location. The availability of three monitoring networks (including local and regional data, short-period and broadband seismometers, and surface and in-mine installation) presented an optimal setup to determine rupture parameters and to compare the performance and results from different installations. We performed waveform and spectral-based analysis to infer source properties, with a particular interest to the determination of the rupture processes, using different moment tensor (MT) inversion techniques. Our results are surprisingly different, ranging from a dominant thrust mechanism, resolved at closest distances, to a collapse-type rupture, resolved at regional distances. We demonstrate that a complex rupture model is needed to explain all observations and to justify these discrepancies. The final scenario indicates that the rupture nucleated as a weaker thrust mechanism along a pre-existing weakened surface and then continued in a more energetic collapse event. The local LUMINEOS surface network has the potential to resolve both subevents but not using a standard MT decomposition. Here, we propose a new MT decomposition and an alternative MT fitting procedure that can be used to analyze the MT of collapse sources.Online Material: Tables of regional stations and source parameters, and figure of displacement seismograms.

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Section: Introductionmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Complex Rupture Process of the 19 March 2013, Rudna Mine (Poland) Induced Seismic Event and Collapse in the Light of Local and Regional Moment Tensor Inversion

Rudziński¹,

Cesca²,

Lizurek³

2016

Seismological Research Letters

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Potential triggers for large earthquakes in open‐pit mines: A case study from Kuzbass, Siberia

Kocharyan

Кишкина

et al. 2022

Deep Underground Science and Engineering

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The extraction and movement of rock during mining operations is considered a possible trigger for slip along the fault. In this study, possible anthropogenic causes were analyzed for triggering the earthquake with the local magnitude of M L = 6.1 (at a depth of 4 km just beneath the quarry), in the vicinity of the large coal open-pit mine in Russia. This event was the largest earthquake associated with a quarry (an open pit). A sufficiently deep occurrence of the source testified that seismic vibrations were produced in a dynamic slip along a preexisting and prestressed tectonic fault. Analytical calculations were conducted of increments of normal and shear stresses at fault planes with several dip angles at depths corresponding to the probable location of the hypocenter of the Bachat earthquake. As the results show, long-term rock excavations bring a prestressed thrust fault closer to the ultimate Coulomb strength, and stress variations at those depths may suffice to initiate a movement along the fault. By measuring seismic vibrations at different quarries and mines in Russia, the dynamic effect at the supposed depth of the source occurrence could be reliably estimated. As is shown, the ultimate anticipated dynamic deformations are noticeably lower than corresponding values produced by seismic waves of distant earthquakes in the case when the effects of dynamic triggering were observed. Accordingly, the seismic effect of explosions cannot trigger a large earthquake with deep source occurrence. Operations in open-pit mines can only bring forward the moment of an earthquake at a potentially seismogenic fault. At the same time, the numerical calculations reveal that a branching network of underground tunnels located at several horizons can noticeably reduce the effective shear modulus of the host rock. This effect can even provoke a dynamic movement at a previously aseismic fault.

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