Attenuation and duration of seismic signals generated from controlled methane and coal dust explosions in an underground mine

2012 ◽  
Vol 56 ◽  
pp. 112-120 ◽  
Author(s):  
Michael M. Murphy ◽  
Erik C. Westman ◽  
Thomas M. Barczak
Keyword(s):  
Coal Dust ◽  
Underground Mine ◽  
Seismic Signals ◽  
Dust Explosions

SYSTEM APPROACH TO ANALYSIS OF THE REASONS FOR METHANE EXPLOSIONS AND COAL DUST ON RUSSIAN MINES

2020 ◽  
Author(s):  
Виктория Владимировна Смирнякова ◽  
Валерий Витальевич Смирняков ◽  
Федор Александрович Орлов
Keyword(s):  
Statistical Methods ◽  
System Approach ◽  
Coal Dust ◽  
Technical Analysis ◽  
Analysis Methods ◽  
Dust Explosions ◽  
Comparative Results

Авторами приведены статистические данные об авариях, связанных со взрывами газа и пыли на горных предприятиях России. Показаны сравнительные результаты оценки причин аварийных ситуаций, проведенных статистическими методами и методами технического анализа. The authors provide statistics on accidents associated with gas and dust explosions at mining enterprises in Russia. Comparative results of the assessment of the emergencies causes conducted by statistical methods and technical analysis methods are shown.

Experimental and numerical study on flame propagation behaviors in coal dust explosions

2014 ◽  
Vol 266 ◽  
pp. 456-462 ◽  
Author(s):  
Weiguo Cao ◽  
Wei Gao ◽  
Yuhuai Peng ◽  
Jiyuan Liang ◽  
Feng Pan ◽  
...  
Keyword(s):  
Flame Propagation ◽  
Numerical Study ◽  
Coal Dust ◽  
Dust Explosions

Coal dust explosions in a large-scale vertical tube apparatus

1971 ◽  
Vol 17 (2) ◽  
pp. 159-170 ◽  
Author(s):  
K.N. Palmer ◽  
P.S. Tonkin
Keyword(s):  
Large Scale ◽  
Coal Dust ◽  
Vertical Tube ◽  
Dust Explosions

Post-explosion observations of experimental mine and laboratory coal dust explosions

2007 ◽  
Vol 20 (4-6) ◽  
pp. 607-615 ◽  
Author(s):  
Kenneth L. Cashdollar ◽  
Eric S. Weiss ◽  
Terry G. Montgomery ◽  
John E. Going
Keyword(s):  
Coal Dust ◽  
Dust Explosions

scholarly journals Variation of ignition sensitivity characteristics of non-stick coal dust explosions

2020 ◽  
Author(s):  
Di Sha ◽  
Yucheng Li ◽  
Xihua Zhou ◽  
Ruiqing Li
Keyword(s):  
Ignition Temperature ◽  
Coal Dust ◽  
Dust Cloud ◽  
Particle Sizes ◽  
Ignition Energy ◽  
Minimum Ignition Energy ◽  
Dust Layer ◽  
Independent Variables ◽  
Minimum Ignition Temperature ◽  
Dust Explosions

Abstract The ignition and explosion of coal dust are significant hazards in coal mines. In this study, the minimum ignition temperature and energy of non-stick coal dust were investigated empirically at different working conditions to identify the key factors that influence the sensitivity and characteristics of coal dust explosions. The results showed that for a given particle size, the minimum ignition temperature of the coal dust layer was inversely related to the thickness of the coal dust layer. Meanwhile, when the layer thickness was kept constant, the minimum ignition temperature of the coal dust layer decreased with smaller coal dust particle sizes. Over the range of particle sizes tested (25–75 μm), the minimum ignition temperature of the coal dust cloud gradually increased when larger particles was used. At the same particle size, the minimum ignition temperature of the coal dust layer was much lower than that of the coal dust cloud. Furthermore, the curves of minimum ignition energy all exhibited a minimum value in response to changes to single independent variables of mass concentration, ignition delay time and powder injection pressure. The interactions of these three independent variables were also examined, and the experimental results were fitted to establish a mathematical model of the minimum ignition energy of coal dust. Empirical verification demonstrated the accuracy and practicability of the model. The results of this research can provide an experimental and theoretical basis for preventing dust explosions in coal mines to enhance the safety of production.

scholarly journals Evaluation of a 38 L Explosive Chamber for Testing Coal Dust Explosibility

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Robert Eades ◽  
Kyle Perry
Keyword(s):  
United States ◽  
Standardized Tests ◽  
Coal Dust ◽  
Pressure Ratio ◽  
Mining Industry ◽  
The United States ◽  
Maximum Pressure ◽  
Underground Coal Mine ◽  
Industry Research ◽  
Dust Explosions

Coal dust explosions are the deadliest disasters facing the coal mining industry. Research has been conducted globally on this topic for decades. The first explosibility tests in the United States were performed by the Bureau of Mines using a 20 L chamber. This serves as the basis for all standardized tests used for combustible dusts. The purpose of this paper is to investigate the use of a new 38 L chamber for testing coal dust explosions. The 38 L chamber features design modifications to model the unique conditions present in an underground coal mine when compared to other industries where combustible dust hazards are present. A series of explosibility tests were conducted within the explosive chamber using a sample of Pittsburgh pulverized coal dust and a five kJ Sobbe igniter. Analysis to find the maximum pressure ratio and Kst combustible dust parameter was performed for each trial. Based upon this analysis, observations are made for each concentration regarding whether the explosibility test was under-fueled or over-fueled. Based upon this analysis, a recommendation for future explosibility testing concentrations is made.

Hybrid CH4/coal dust explosions in a 20-L spherical vessel

2019 ◽  
Vol 122 ◽  
pp. 281-287 ◽  
Author(s):  
Shi-xiang Song ◽  
Yang-fan Cheng ◽  
Xiang-rui Meng ◽  
Hong-hao Ma ◽  
Hong-yun Dai ◽  
...  
Keyword(s):  
Coal Dust ◽  
Spherical Vessel ◽  
Dust Explosions
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