scholarly journals The evolution of seismic monitoring systems at the Hawaiian Volcano Observatory

2014 ◽  
pp. 67-94 ◽  
Author(s):  
Paul G. Okubo ◽  
Jennifer S. Nakata ◽  
Robert Y. Koyanagi
Keyword(s):  
Seismic Monitoring ◽  
Monitoring Systems ◽  
Volcano Observatory ◽  
Seismic Monitoring Systems ◽  
Hawaiian Volcano

Basic principles for building seismic monitoring systems in rockburst-hazardous coal seam mining

2021 ◽  
pp. 8-12
Author(s):  
E. E. Razumov ◽  
◽  
S. M. Prostov ◽  
G. D. Rukavishnikov ◽  
S. N. Mulev ◽  
...  
Keyword(s):  
Seismic Activity ◽  
Average Energy ◽  
Seismic Monitoring ◽  
Acoustic Properties ◽  
Signal Frequency ◽  
Monitoring Systems ◽  
Seismic Events ◽  
Seismic Monitoring Systems ◽  
Seismic Sensors ◽  
Seam Mining

The main directions of development of seismic monitoring systems in underground mineral mining are analyzed. The expediency of passive registration of natural seismic activity is proved, which provides prediction of geodynamic phenomena by locating the centers of seismic events and determining their energy level. The methods of active seismic monitoring (seismic tomography, cross-borehole survey, recording of seismic signal from a rock-breaking tool) are technically more difficult to implement. The promising methods for processing seismic information are geolocation, neural network technology, cluster analysis, and integration with numerical stress–strain analysis of and changes in acoustic properties of rock mass. The configuration of the platform developed at VNIMI and the GITS seismic monitoring system, which includes from 6 to 12 three-component seismic sensors installed permanently in wells or on pedestals, is described. The detailed layouts of seismic sensors at recording points and in gateways in extraction panels are presented. The main technical characteristics of GITS are given: the signal frequency range is 0.1–1000 Hz, the minimum recorded signal level is 0.01 mV. The main test data of GITS in Komsomolskaya mine of Vorkutaugol are described: the average annual levels of seismic activity and energy of seismic events are found to be relatively stable; the relationship between seismic event with the maximum total energy and the alternating increment in the relative criterion is defined, and the local increase in the average energy of a single event in time from the moment the main roof caving is identified. Aimed to substantiate the regional and local prediction criteria of probability of geodynamic events caused by confining pressure, VNIMI implements integrated research in mines in different regions.

Landslide and Seismic Monitoring Systems

2018 ◽  
pp. 43-62
Author(s):  
Alexander Ginzburg ◽  
Valentina Svalova ◽  
Alexey Nikolaev ◽  
German Postoev ◽  
Andrey Kazeev
Keyword(s):  
Seismic Monitoring ◽  
Monitoring Systems ◽  
Seismic Monitoring Systems

scholarly journals Seismic Monitoring System of Baixo Sabor and Feiticeiro Dams

2020 ◽  
Vol 6 (11) ◽  
pp. 2072-2085
Author(s):  
Gilberto Silva Monteiro ◽  
Jorge Pacheco Neves ◽  
Jorge Pereira Gomes
Keyword(s):  
Monitoring System ◽  
Seismic Risk ◽  
Seismic Monitoring ◽  
Continuous Operation ◽  
Monitoring Systems ◽  
Dam Safety ◽  
Large Dams ◽  
Seismic Monitoring Systems ◽  
Hydroelectric Projects ◽  
Tectonic Settings

In the last decade Portugal made a significant set of investments in new hydroelectric projects. According the Portuguese Dam Safety Regulation and Supporting Technical Documents, and the seismic risk for the regions where the dams were built, several seismic monitoring systems were implemented. One of the most important projects was the Baixo Sabor hydroelectric scheme which includes two large dams, namely the Baixo Sabor and Feiticeiro dams. These dams are located at northeast of Portugal and are very close to a major geological fault that crosses the Portuguese territory. Considering the seismic risk of the dam’s construction area, a seismic monitoring system was provided. That system incorporates stations in the dam’s galleries and remote stations along the reservoirs to detect eventual induced reservoir seismicity. This system has been in continuous operation and the data of the recorded earthquakes records has been analyzed and processed. This paper presents some aspects of the Portuguese legislation, refers the main studies that were used, presents a brief description of the regional Baixo Sabor geological and tectonic settings, describes the main features of the seismic monitoring system and presents some of the main results obtained during the first period of operation of the dams. Doi: 10.28991/cej-2020-03091603 Full Text: PDF

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