Results 21 to 30 of about 181,351 (283)

Effects of Metamorphic Degree of Coal on Coal Dust Wettability and Dust-Suppression Efficiency via Spraying

open access: yesAdvances in Materials Science and Engineering, 2020
Currently, spraying is a main means for dust prevention and control in underground coal mines. The dust-suppression efficiency via spraying is highly correlated with the wettability of coal dusts.
Pengfei Wang   +4 more
doaj   +1 more source

Experimental study on ignition of methane and coal dust on the surface of high temperature heat source

open access: yesGong-kuang zidonghua, 2021
The high temperature area of coal spontaneous combustion in coal mine goaf may cause methane/coal dust explosion. Therefore, it is necessary to carry out research on coal spontaneous combustion induced methane/coal dust explosion. The current research on
WANG Yi, WANG Haiyan, ZHANG Lei, HU Lang
doaj   +1 more source

Research of influence factors on characteristic parameters of coal dust explosio

open access: yesGong-kuang zidonghua, 2014
Influence of particle size, concentration and ignition energy of coal dust on the maximum pressure and its rising rate of coal dust explosion were researched by use of 20 L spherical explosion equipment. The research results show that under the condition
LIU Zhentang, GUO Rulin, XI Runze
doaj   +1 more source

Research on the minimum ignition temperature variation law of coal dust cloud with different coal quality

open access: yesGong-kuang zidonghua, 2019
In order to research the minimum ignition temperature variation law of coal dust cloud with different coal quality, eight coal samples including lignite, long-flame coal, non-caking coal, gas coal, charred coal, lean coal, meagre coal and anthracite were
LIU Tianqi
doaj   +1 more source

Comparative study of the explosion pressure characteristics of micro- and nano-sized coal dust and methane–coal dust mixtures in a pipe

open access: yesInternational Journal of Coal Science & Technology, 2020
Coal dust explosion accidents often cause substantial property damage and casualties and frequently involve nano-sized coal dust. In order to study the impact of nano-sized coal on coal dust and methane–coal dust explosions, a pipe test apparatus was ...
Bo Tan, Huilin Liu, Bin Xu, Tian Wang
doaj   +1 more source

Effect of coal dust parameters on gas-coal dust explosions in pipe networks

open access: yesGeomatics, Natural Hazards & Risk, 2022
To study the effects of coal dust particle size and mass of coal dust on gas-coal dust hybrid explosions, we conducted sedimentary gas-coal dust explosion experiments using a pipe network system that included multiple components and individual ...
Jia Jinzhang, Wang Fengxiao, Li Jie
doaj   +1 more source

Numerical Study of the Respirable Coal Dust Removal Performance of a Vortex Ventilation System at an Excavation Face

open access: yesEnergies, 2018
Coal dust is one of the most serious issues in coal mines. The miners at an excavation face have a high potential for exposure to high concentrations of coal dust. The main method for removing coal dust is by ventilation.
Xiaofei Liu   +4 more
doaj   +1 more source

A New Quantitative Method for Risk Assessment of Coal Floor Water Inrush Based on PSR Theory and Extension Cloud Model

open access: yesGeofluids, 2021
In order to scientifically and reasonably assess the risk of water inrush from the coal seam floor, considering the influence of natural environmental factors such as hydrogeology, mining, and human intervention, the PSR model of ecosystem health ...
Bingyou Jiang   +7 more
doaj   +1 more source

Evaluation of the Risk Factors on Coal Dust Explosion in Warehouse

open access: yesMATEC Web of Conferences, 2016
Coal has been one of the major energy sources in the world. Many industries use coal as a main fuel. A coal dust explosion is one of the main hazards of coal utilization because of its massive damage.
Chanthaphasouk Latana   +4 more
doaj   +1 more source

Research on perception method of coal mine gas and coal dust explosion based on explosion sound recognition

open access: yesGong-kuang zidonghua, 2023
The characteristics of coal mine gas and coal dust explosion are analyzed. The gas concentration changes suddenly. The ambient temperature rises rapidly. The air pressure rises suddenly. It produces fireballs and smoke.
SUN Jiping   +3 more
doaj   +1 more source

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