Results 71 to 80 of about 6,878 (277)

Multi-factor Contribution to the Height of Water-conducting Fracture Zone and Mine Zoning for Water Protection in Yushen Coalfield

Taiyuan Ligong Daxue xuebao, 2023
Predicting the Water-conducting fracture zone height (WFZH) and determining the mining zones that require water conservation operations are critical for the mine sustainability. In this paper, mathematical statistics, multiple regression and spatial analysis methods were employed to analyze the mechanisms of longwall parameters contributing to WFZH and
Shuai ZHANG, Guorui FENG, Dongsheng ZHANG, Wei YU   +3 more
openaire   +1 more source

Experimental Characterization and Constitutive Modeling of the Effect of Prior Inelastic Strain on the Viscoplastic Behavior of AD730 at 700 °C

Advanced Engineering Materials, EarlyView.
This study shows that superalloys used in aircraft engine disks become much more prone to deformation at high temperatures if they have been strained during manufacturing. This effect increases with the level of prior strain but eventually reaches a limit.
Fabio Machado Alves da Fonseca, Patrick Villechaise, Malik Durand, Arnaud Longuet, Florent Coudon, Loïc Signor, Julien De Jaeger, Dominique Eyidi, Nathalie Bozzolo, Jonathan Cormier   +9 more
wiley   +1 more source

Determination of Fractured Water-Conducting Zone Height Based on Microseismic Monitoring: A Case Study in Weiqiang Coalmine, Shaanxi, China

, 2022
The NO. 3 coal seam of the Weiqiang coalmine is faced with a water inrush threat caused by two large reservoirs and the upper confined aquifer. However, existing empirical formulas cannot accurately predict the height of the fractured water-conducting ...
Yingchun Li, Qingyuan He, Wei Gao
core   +1 more source

A Dislocation Perspective on Strength and Toughness in Ceramics

Advanced Engineering Materials, EarlyView.
Dislocations in ceramics enjoy a long but yet under‐appreciated history. The three research waves for dislocations in ceramics highlight the topic evolution over the last 90 years. This review focuses on the impact of dislocation on strength and toughness in ceramics.
Xufei Fang
wiley   +1 more source

Fracture mechanics of volcanic eruptions [PDF]

, 2009
Seismology is a key tool in the forecasting of volcanic eruptions. The onset of an eruption is often preceded and accompanied by an increase in local seismic activity, driven by fracturing within the edifice.
Matthews, C., Matthews, C
core  

Microstructure, Thermal Transport, and Dry‐Sliding Tribology of Powder‐Metallurgy Al7075 Composites Reinforced With Sol–Gel‐Derived ZnO–rGO Hybrid Nanoparticles

Advanced Engineering Materials, EarlyView.
Sol–gel‐derived ZnO–rGO hybrid nanoparticles enable Al7075 powder‐metallurgy composites to achieve concurrent gains in hardness and thermal conductivity while markedly lowering friction and wear. The hybrid architecture couples ZnO‐based load support with rGO‐assisted lamellar sliding and heat spreading, revealing a promising route toward lightweight ...
Bunyamin Aksakal, Cevher Kursat Macit, Merve Ayık, Hakan Tutumlu   +3 more
wiley   +1 more source

Study on evolution law of water-conducting fracture zone in steeply inclined coal seam longwall fully-mechanized top-coal caving face

Meikuang Anquan
To study the development height of the water-conducting fracture zone (WCFZ) in the steeply inclined longwall fully-mechanized top-coal caving face, the 202 fully-mechanized caving face in the west No.2 mining area of Wangjiashan Coal Mine was taken as ...
Panshi XIE, Jiarui FANG, Bo ZHANG, Weidian LIN, Junjun XING   +4 more
doaj   +1 more source

Experimental Study on Drainage of Strata Water-Bearing and Permeability in Huangyuchuan Coal Mine

Meikuang Anquan, 2020
The pumping test was carried out by arranging pumping holes in the ground of Huangyuchuan Mine to test the water inflow, permeability coefficient and influence radius of different hole positions, and to master the characteristics of water and ...
WU Hongtao, CHEN Jiangfeng, WANG Chongping, DOU Hao3
doaj   +1 more source

Evolution of Water-Conducting Fracture in Weakly Cemented Strata in Response to Mining Activity: Insights from Experimental Investigation and Numerical Simulation

, 2023
The accurate prediction of the vertical extent of water-conducting fracture (WCF) zones in weakly cemented strata is particularly significant in preventing and controlling water hazards in western coal mines. The evolution of fractures in weakly cemented
Quanhui Liu, Chenyao Zhou, Dan Ma, Guanshi Wang, Yong Liu, Zhen Huang   +5 more
core   +1 more source

Defect Evolution and Mechanical Performance of Fused Filament Fabrication‐Manufactured 17‐4PH Stainless Steel Revealed by X‐Ray Computed Tomography

Advanced Engineering Materials, EarlyView.
X‐ray computed tomography reveals how process‐induced defects evolve from green to sintered states in Fused Filament Fabrication (FFF)‐manufactured 17‐4PH stainless steel. Internal porosity, weakest cross‐sections, and fracture locations show strong correlation with tensile performance, demonstrating the potential of computed tomography (CT)‐based ...
György Ledniczky, Márk Sárközi, Ibolya Zsoldos, Zoltán Weltsch   +3 more
wiley   +1 more source