Results 41 to 50 of about 2,483,836 (160)

Dynamic cracking properties and generating conditions of coal under rapid gas release

Deep Underground Science and Engineering, EarlyView.
Gas release tests revealed that crack initiation and propagation are jointly controlled by initial crack length, residual strength, and gas release velocity. A new outburst risk coefficient was thus developed from a fracture mechanics perspective, offering a novel predictive approach.
Bing Zhang, Hanpeng Wang, Liang Yuan, Guofeng Yu, Wei Wang, Benliang Chen, Bo Ren   +6 more
wiley   +1 more source

Influence of Coal Quality Index on Maximum Pressure Rise Rate in Coal Dust Explosion

, 2020
In order to study the influence of coal dust index on coal dust explosion, the maximum pressure rising rate of coal dust explosion with different industrial components was measured by 20 L spherical explosion vessel.
JING Guoxun, PENG Le, BAN Tao1
core   +1 more source

Advances in vital‐sign prediction and early‐warning models for underground coal mine workers integrating environmental factors

Deep Underground Science and Engineering, EarlyView.
This review synthesizes advances in predicting miners' vital signs by integrating environmental monitoring (dust, temperature, and gas) with physiological data. It highlights multi‐source data fusion techniques and early‐warning models for enhanced occupational safety in underground coal mines.
Junji Zhu, Dawei Cui, Yingjie Liu, Yuntao Liang, Yue Zhang   +4 more
wiley   +1 more source

The Application of Hydrochar Composite Briquettes for Sustainable Slag Foaming in the Electric Arc Furnace Process

steel research international, EarlyView.
Hydrochar‐mill‐scale briquettes with varying C/O molar ratios (0.07–0.90) have been tested at 1650 °C to evaluate their slag foaming performance for electric arc furnace application. All seven briquette recipes developed succeed in promoting slag foaming.
Yu‐Chiao Lu, Andrey Karasev, Björn Glaser, Chuan Wang   +3 more
wiley   +1 more source

Dust formation and evolution in the ejecta of core-collapse supernovae [PDF]

, 2015
Observations of local supernovae over the past couple of decades have reported the presence of dust in the ejecta. The dust masses inferred from observations in mid-infrared and submillimeter wavelengths differ by a factor of 10^2 to 10^4 The composition
Sarangi, Arkaprabha
core   +1 more source

The influence of the shape and size of dust fractions on their distribution and accumulation in mine workings when changing the structure of air flow

Записки Горного института, 2022
The results of the analysis of statistical data on accidents at Russian mines caused by explosions in the workings space have shown that explosions of methane-dust-air mixtures at underground coal mines are the most severe accidents in terms of ...
Valery V. Smirnyakov, Vladimir A. Rodionov, Victoria V. Smirnyakova, Fedor A. Orlov   +3 more
doaj   +1 more source

Foamed Concrete Sealing Materials for Coal Seam Gas Drainage Boreholes: A Review

Safety Science and Technology, EarlyView.
This study investigates the sealing performance of foamed concrete in gas drainage boreholes. By comparing leakage pathways (a, c) with sealed systems (b, d), the research demonstrates how foamed concrete effectively fills mining‐induced fractures and resists deformation.
Jiaxing Zou, Erlei Su, Huanchun Liu, Xiangjun Chen, Lin Wang, Haidong Chen, Lin Li   +6 more
wiley   +1 more source

Progress in Explosion Mechanisms and Prevention Technologies for Direct Chill Casting Aluminum Melt Upon Water Contact: A Review

Safety Science and Technology, EarlyView.
Molten aluminum–water explosion triggered by leakage remains the core unresolved safety hazard hindering safe production in aluminum direct chill casting. This review summarizes its explosion mechanism, key influencing factors, prevention technologies, existing gaps, and prospects of intelligent multi‐technology integrated explosion‐proof systems ...
Min Wang, Kang Yang, Jiang Dong, Lidong Xing, Bing Chen, Changke Chen   +5 more
wiley   +1 more source

Minimum explosion concentrations of coal dusts with CH4/H2/CO below the gas lower explosion limit

, 2020
A 20-L spherical explosion chamber was used to investigate the explosion characteristics of dust clouds in air with the presence of flammable gas which is lower than its lower explosion limit (LEL).
Schmidt, Martin, Huang, W., Qianc, X., Zhao, P., Wu, Dejian, Tan, X.   +5 more
core   +1 more source

Study on Suppression of the Coal Dust/Methane/Air Mixture Explosion in Experimental Tube by Water Mist [PDF]

, 2011
In order to develop highly effective and reliable measures to suppress the coal dust/methane/air mixture explosion frequently occurred in coal mine, the effect of the presence of methane on the coal dust explosion was investigated in this study.
An, An, Zheng, Ligang, Yu, Minggao, You, Hao   +3 more
core   +1 more source