Article
Construction & Building Technology
Lihua Hu, Zhenghu Zhang, Xin Liang, Chunan Tang
Summary: The study found that moderate seismically induced rockbursts have the largest fractal dimension under similar static loading conditions, followed by self-initiated rockbursts, and weak seismically induced rockbursts have the smallest fractal dimension. There is a linear relationship between the average fractal dimension and kinetic energy of these rockbursts, which can serve as an indicator for estimating rockburst intensity. From a fractal point of view, the energy input, dissipation, and release of these rockbursts are all linear processes.
ADVANCES IN CIVIL ENGINEERING
(2021)
Article
Engineering, Geological
Changbin Wang, Guangyao Si, Chengguo Zhang, Anye Cao, Ismet Canbulat
Summary: Data integrity and reliability are crucial for seismic event detection in underground mines, as incomplete datasets can lead to bias during data analyses. This study evaluated the event detection probability of a seismic monitoring system in an underground coal mine, revealing that different locations and energy levels have varying wave picking capacities. Additionally, a method to correct seismic data was proposed to improve the completeness of recorded seismic data and enhance the accuracy of seismic analyses.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Anatoly Kozyrev, Andrian Batugin, Jianping Zuo, Svetlana Zhukova
Summary: Retrospective analysis of data from two deposits in Russia shows that seismic activity increases significantly during spring snowmelt periods. Factors such as high snow water reserve, long snowmelt period, continuous increase in water influx for more than 5 days, and total water inflow volume exceeding previous measurements by at least a factor of 2 contribute to this upswing. In addition, seismic activity starts to intensify when mining reaches depths of more than 500 m, with earthquakes occurring from a depth of 100-200 m. Water intrusion into tectonic faults may be a controlling factor for seismic activation.
Article
Engineering, Civil
Leandro F. Fadel Miguel, Fabio Alminhana, Andre T. Beck
Summary: The article evaluates the seismic performance of two typical 230 kV transmission towers in a PBEE framework, considering artificial and actual ground motions based on Chilean seismicity. Significant structural damage was detected even for moderate ground motions, which might reduce the tower capacity to future climatic events. The estimated failure probability for the ultimate limit state was found greater than the recommended values in the standard IEC 60826 (2017).
ENGINEERING STRUCTURES
(2021)
Article
Chemistry, Analytical
Hui Li, Anye Cao, Siyuan Gong, Changbin Wang, Rupei Zhang
Summary: This study investigates the impact of seismic data volume and sensor layout on the reliability and robustness of the PDE method. It finds that compensating seismic data using the PDE method improves the accuracy of locating future hazardous events.
Article
Engineering, Electrical & Electronic
Lu Zhang, Bo Tong, Zhaoqi Wang, Wei Tang, Chen Shen
Summary: To mitigate voltage violation and overloading, converting some AC medium voltage distribution lines to DC and creating an AC/DC hybrid distribution network is a feasible solution. However, the existing configuration optimization methods do not adequately consider the power complementarity among AC/DC lines. This paper proposes an analytic quantifiable method to describe this complementarity and presents an optimal configuration method for the hybrid network considering the power flows on AC/DC lines.
IEEE TRANSACTIONS ON SMART GRID
(2022)
Article
Geosciences, Multidisciplinary
Sumanta Pasari, Andrean V. H. Simanjuntak, Anand Mehta, Neha, Yogendra Sharma
Summary: The study developed an analytical framework known as earthquake nowcasting to assess the current dynamical state of earthquake hazards in Sumatra and adjacent islands. By assigning earthquake potential scores to 19 large cities based on instrumental earthquake data, the research provides a unique characterization of the current level of seismic progression and aims to facilitate efficient seismic risk reduction strategies in the densely populated study region.
Article
Engineering, Marine
A. D. Boon, P. R. Wellens
Summary: This article proposes a method to quantify the probability and expected maximum pressures of green water events for ships at forward speed. With a large data set obtained from model test experiments, the distribution of the time between green water occurrences and the distribution of maximum pressures caused by green water are identified as exponential and Frechet distributions, respectively. An equation to calculate the probability of a pressure limit being exceeded for a ship in operation is formulated based on the newly identified distributions.
Article
Engineering, Electrical & Electronic
Kenichi Kanatani, Susumu Matsuura, Hirofumi Fujita, Koji Michishita
Summary: In Japan, surge arresters have been installed on overhead distribution lines to reduce lightning overvoltages. While the installation of surge arresters has decreased lightning outages caused by insulator flashovers, several surge arresters have been damaged by direct lightning strikes. This paper presents the influence of distribution line configuration on the failure probability of surge arresters obtained through lightning surge analysis.
ELECTRIC POWER SYSTEMS RESEARCH
(2022)
Article
Environmental Sciences
Sophie Lagarde, Michael Dietze, Florent Gimbert, Jonathan B. Laronne, Jens M. Turowski, Eran Halfi
Summary: Seismic monitoring provides an alternative to in-stream monitoring for measuring bedload transport, but challenges exist in data conversion and accuracy. Field experiments help to constrain seismic bedload models and reduce differences between simulated results and actual measurements.
WATER RESOURCES RESEARCH
(2021)
Article
Mining & Mineral Processing
I. E. Semenova, I. M. Avetisyan, O. G. Zhuravleva, O. V. Belogorodtsev
Summary: The article emphasizes the urgency of studying processes of deformation, displacement, and collapse of undermined strata at rockburst-hazardous deposits of the Khibiny Massif. The authors analyze the failure specifics in undermined strata under tectonic stresses and note that the degree of failure increases as the thickness of ore bodies decreases and dip angle grows.
JOURNAL OF MINING SCIENCE
(2022)
Article
Engineering, Geological
Fang-Wen Ge, Ming-Na Tong, Yan-Gang Zhao
Summary: This study proposes a novel three-parameter lognormal distribution model for seismic fragility analysis, which shows a better fitting effect and applicability than the existing lognormal model. The accuracy and feasibility of the proposed model are proven through numerical analysis on two common structural types.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2021)
Article
Geochemistry & Geophysics
Chao Sun, Jerome Fortin, Jan V. M. Borgomano, Shangxu Wang, Genyang Tang, Tom Bultreys, Veerle Cnudde
Summary: This study investigates the attenuation and dispersion characteristics of elastic-wave velocities in partially saturated reservoirs through experiments and numerical modeling. The experimental results demonstrate that compressional velocities are strongly sensitive to the sample's saturation method, while shear velocities show little variation. Micro-CT scans reveal that the attenuation and dispersion of velocities are influenced by the distribution of pore fluids.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Environmental Sciences
Wojciech Milczarek, Anna Kopec, Dariusz Glabicki, Natalia Bugajska
Summary: This article presents an approach to using satellite radar data to analyze the formation process of a subsidence trough caused by mining tremors, verifying the calculation of basic indicators for the trough. The study focused on four powerful mining tremors in the Legnica-Glogow Copper Belt area in southwest Poland, demonstrating the feasibility of calculating indicators resulting from specific induced mining events.
Article
Engineering, Chemical
Bhaumik Sutariya, Santanu Karan
Summary: This article discusses the importance of high flux nanofiltration (NF) membranes and mathematical models for pore size estimation. It provides a detailed discussion on the probability density function (PDF) model and addresses its flaws and the need for standardization.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
