Numerical Modeling News Today

SRINAGAR: A week-long workshop on

Numerical modeling is key for deep mining, enabling safe design by simulating complex rock behaviors and stress distributions.

A variety of coal room and pillar mining methods have been efficiently practiced at depths of up to 500 m with least strata mechanics issues. However, for the first time, this method was trialled at depths of 850–900 m in CSM mine of Czech Republic. The rhomboid-shaped coal pillars with acute corners of 70°, surrounded with 5.2 m wide and 3.5–4.5 m high mine roadways, were used. Pillars were developed in a staggered manner with their size variation in the Panel II from 83 m × 25 m–24 m �...

In practical engineering, coal burst is usually caused by the combination of high geo-stress and dynamic loading. To study the dynamic response of coal in geo-stress conditions, numerical models of a coupled static–dynamic split Hopkinson pressure bar (SHPB) test system were established, based on which impact tests for coal specimens at different impact speeds and static pre-stress levels were conducted. The mechanical properties, energy characteristics and failure patterns of coal specimens u...

The unique ecosystems and biodiversity associated with mid-ocean ridge (MOR) hydrothermal vent systems contrast sharply with surrounding deep-sea habitats, however both may be increasingly threatened by anthropogenic activity (e.g., mining activities at massive sulphide deposits). Climate change can alter the deep-sea through increased bottom temperatures, loss of oxygen, and modifications to deep water circulation. Despite the potential of these profound impacts, the mechanisms enabling these s...

Introduction The establishment of China’s first official overseas military base in Djibouti in 2017 set the precedent for People’s Liberation Army (PLA) units to be permanently stationed abroad. Many foreign analysts assume that China will continue expanding its overseas military presence, most likely through a mix of adding new bases and leveraging dual-use ports. The 2021 U.S. Department of Defense …

Soft-soil reinforcement with stone columns is a popular ground improvement method. Installation of columns modifies the surrounding soft soil properties; this phenomenon is termed "smear."Although several previous investigations were carried out on smear zone characterization, appropriate field-based studies are limited. The authors performed field-based investigations to quantify the installation effects by collecting a series of undisturbed soil samples from a reinforced soft ground ...

Novel approaches developed by scientists including Lexie Yang of ORNL scan massive datasets of large-scale satellite images to more accurately map infrastructure – such as buildings and roads – in hours versus days.

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 E-Mail IMAGE: Ensemble-mean forecast anomalies averaged over forecast years 2-9 for summer precipitation on the inner Tibetan Plateau. Red line: hindcasts; Blue line: quasi real-time predictions; Black line: observations. Shadings represent uncertainty.... view more  Credit: HU Shuai Summer rainfall on the Tibetan Plateau is highly predictable on multiyear timescales in large ensemble predictions, according to a research team led by ZHOU Tianjun from the Institute of Atmospheric Physic...