Results 41 to 50 of about 1,049 (181)

Analysis and countermeasures of coal mine safety in Guizhou Province

Meikuang Anquan, 2021
In order to carry out coal mine production scientifically, safely and efficiently, and improve the overall production level of coal mine safety in Guizhou Province, this paper applies statistical methods to carry out the analysis of coal mine safety ...
SUN Guangyu, YANG Fuling, QI Chaoxin
doaj   +1 more source

Research on alarm method of coal mine extraordinary accidents based on sound recognitio

Gong-kuang zidonghua, 2021
Coal mine gas and coal dust explosion will produce explosive sound. Coal and gas outburst will produce the sound of coal cannon and the supports will produce squeaking and cracking sound.
SUN Jiping, YU Xingche
doaj   +1 more source

Research on the propagation of pressure and CO gas of methane and coal dust coupled explosion

Thermal Science, 2022
A methane and coal dust explosion system was constructed to investigate the propagation of pressure and CO gas after methane and coal dust coupling explosion. The influence of coal dust concentration on the propagation of pressure and CO gas were analyzed by coupling explosion experiments of 5% methane with coal dust (0, 100 g/m3, 200 g/m3, 300 g/m3 ...
Guoxun Jing, Le Peng, Lulu Mu
openaire   +2 more sources

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

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

Experimental study on the minimum explosion concentration of anthracite dust: The roles of O2 mole fraction, inert gas and CH4 addition

, 2021
The explosion characteristics of anthracite coal dust with/without small amount of CH4 (1.14 vol %) were investigated by using a 20 L spherical explosion apparatus with an emphasis on the roles of oxygen mole fraction and inert gas.
Schmidt, Martin, Krietsch, Arne, Krause, U., Zhao, P., Duan, Q., Wu, Dejian   +5 more
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

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

Solar Fuels Via Methane Valorization: Thermochemical Pathways, Unified Metrics, and Techno‐Economic Perspectives

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A first‐of‐its‐kind review benchmarks three solar methane valorization pathways with unified performance metrics for clean fuel production. Meeting global climate targets and sustainable energy demands requires carbon‐neutral fuels and innovative conversion pathways.
Muhammad Abdulmoez, Amjad Othman, Majid Linjawi, Amro Al‐Qutub   +3 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