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Construction & Building Technology
Kaoutar Diouri et al.
Summary: This study investigates the dynamic behavior of asphalt mortar under high strain rates through SHPB experiments. The results show that the dynamic strength and impact toughness of the asphalt mortar increase with higher strain rates and temperatures. Laboratory oven aging at high temperature also affects the properties of the asphalt mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Mechanics
Payam Asadi et al.
Summary: This study examines the effect of defects and notches on the tensile strength of synthetic rock under static and dynamic loads. The results show that defects and notches enhance the response of synthetic rock to stress rate, and the fracture toughness increases significantly with intensified loading rate. Furthermore, when high-intensity loading rates are applied, the dynamic tensile strength remains unchanged with increasing notch length. Based on these findings, an equation is derived that suggests a linear relationship between rock tensile strength and strain rate.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Engineering, Geological
Vivek Padmanabha et al.
Summary: The aim of the study is to investigate the strength behavior and fragment size of rocks in different tensile tests. Four rocks with different lithological characteristics were selected and experiments were conducted with various strain rates. The results were in agreement with the theoretical scaling relationship and the size distribution of fragments was determined. The study also showed that the degree of fragmentation is influenced by strain rate and different rocks generate different types of fragments.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Engineering, Geological
Selahattin Akdag et al.
Summary: This paper investigates the relationship between the strain burst mechanism and its dynamic fracture propagation by conducting dynamic fracture toughness tests on thermally treated granite specimens. The results show that the loading rate and temperature significantly affect the initiation toughness and energy partitions in dynamic fracture, and higher temperatures exacerbate the fragmentation degree of granite.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2023)
Article
Ecology
Igor Ivanovich Bosikov et al.
Summary: Underground mining, particularly coal mining, is prone to accidents and fire hazards, posing risks to miners' safety. The risk of fire increases with mining depth, and most accidents in coal mines are currently mine fires. Developing a new methodology to model the ventilation network parameters of mines is crucial for enhancing control of gas atmosphere and ensuring safety. This study used probability theory and mathematical statistics to comprehensively analyze gas-dynamic processes in coal mines and developed a generalized expression for transfer functions of coal mine objects, considering delays and dynamic properties under different operating modes. The study also proposed a graphical method to estimate additional parameters of ventilation system branches and improved spatial modeling to determine gas-dynamic characteristics. Furthermore, a method for managing the process of changing connections between devices in the technical system was developed to enhance safety during mining.
Article
Engineering, Environmental
Sachin Kumar et al.
Summary: This study investigates the influence of flaw inclination angle on the mechanical behavior of rock-like specimens with a pre-existing flaw under different infill conditions. Split Hopkinson pressure bar (SHPB) compression tests were conducted on 81 fabricated samples, coupled with high-speed digital image correlation (DIC) to analyze the dynamic fracture process. The dependency of flaw inclination angle was highest in unfilled samples, but significantly decreased in grouted samples, with a shift towards the mechanical behavior of intact samples. Fracturing was found to be highly dependent on flaw orientation for all infill conditions, with six different types of fractures observed.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Mining & Mineral Processing
Santosh Kumar Ray et al.
International Journal of Mining Science and Technology
(2022)
Article
Engineering, Geological
Sachin Kumar et al.
Summary: The study investigated the transition in the rate-dependent mechanical response of rock due to the presence of impersistent joint with different infill conditions. It was found that the strength of jointed samples was significantly lower compared to intact samples, but the increasing trend of strength with strain rates remained similar for all types of samples. Epoxy was observed to be a better grout than cement, showing greater improvement in the strength of epoxy grouted jointed samples under both static and dynamic conditions.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2022)
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Chemistry, Physical
Albin Wessling et al.
Summary: This paper presents a detailed study on the dynamic mechanical characterization of two rock materials (Kuru grey granite and Kuru black diorite) using a Split-Hopkinson Pressure Bar and high-speed imaging. The study provides information about the fracture initiation and propagation, as well as the indirect tensile strain and strain rates on the surface of the materials. The results show that a proper selection of the sensing region and high temporal resolution can reliably estimate crack formation and subsequent propagation.
Review
Energy & Fuels
Roman V. V. Klyuev et al.
Summary: This study provides an overview of methods used to predict electricity supply requirements, including both classical and modern methods. Power consumption modeling remains an urgent task due to the need to consider the specific characteristics of each subject area for reliable forecast results.
Article
Construction & Building Technology
Thong M. Pham et al.
Summary: The study developed ultra-high-performance rubberized concrete incorporating different rubber contents and steel fibres, finding that the compressive strength decreased with increasing rubber content but remained higher compared to other rubberized concretes. The dynamic compressive strength and energy absorption of the UHPRuC were sensitive to strain rate and increased with rubber content.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Lianpeng Dai et al.
Summary: Rockbursts are a severe dynamic disaster in mines, globally recognized as one of the most serious incidents. By using stability theory, this study obtained critical indexes for remotely triggered rockbursts, including key stress indicators for surrounding rock softening and fracture occurrence. Through quantitative calculations using typical case histories, the main influencing factors and laws of rockbursts were determined, laying a foundation for the development of quantitative criteria for rockbursts.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2021)
Article
Chemistry, Physical
Tomasz Jankowiak et al.
Article
Chemistry, Physical
Ali A. Heravi et al.
Article
Geochemistry & Geophysics
Auriol S. P. Rae et al.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2020)
Article
Construction & Building Technology
Sunita Mishra et al.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2018)
Article
Mining & Mineral Processing
Christopher Mark
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2018)
Article
Engineering, Geological
Mehrdad Imani et al.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2017)
Article
Materials Science, Multidisciplinary
Mahdi Saadati et al.
ADVANCES IN MATERIALS SCIENCE AND ENGINEERING
(2016)
Article
Nanoscience & Nanotechnology
Riddhiman Bhattacharya et al.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2014)
