Safety of nanometer powder control technology-based on mine gas explosion

2021 ◽  
Vol 580 (1) ◽  
pp. 212-224
Author(s):  
Yongshuai Fu
Keyword(s):  
Control Technology ◽  
Gas Explosion ◽  
Mine Gas ◽  
Nanometer Powder

Explosibility Safety Factor: An Approach to Assess Mine Gas Explosion Risk

2013 ◽  
Vol 51 (2) ◽  
pp. 309-323 ◽  
Author(s):  
Jianwei Cheng ◽  
Yi Luo ◽  
Fubao Zhou
Keyword(s):  
Safety Factor ◽  
Gas Explosion ◽  
Mine Gas ◽  
Explosion Risk

An Intrinsic Safe Design for the Coal Mine Gas Explosion-Proof Monitoring

2013 ◽  
Vol 303-306 ◽  
pp. 550-554
Author(s):  
Jun Jie Liu ◽  
Ming Lu ◽  
Qiong Wang
Keyword(s):  
Monitoring System ◽  
Oxygen Content ◽  
Intelligent Control ◽  
Thermal Effects ◽  
Monitoring Site ◽  
Gas Explosion ◽  
Explosion Monitoring ◽  
Coal Mine Gas ◽  
Mine Gas ◽  
Hardware Circuit

The explosion-proof monitoring system of oxygen content usually is used situates in an explosive mine gas explosion monitoring site, the spark and thermal effects in its monitoring circuit are likely to form dangerous explosion source. Based on the intelligent control technology of MCU(msp430) and radio data transmission technique, this mine oxygen content monitoring system was designed according to the highest mining explosion-proof standards, so that its monitoring circuit can meet the intrinsically safe explosion-proof requirements. That is, when the hardware circuit of a explosion-proof monitoring of oxygen content was designed, the factors for limiting the heat source energy with forming the spark and thermal effects must be considered seriously.

Application of Bayesian approach to the assessment of mine gas explosion

2018 ◽  
Vol 54 ◽  
pp. 238-245 ◽  
Author(s):  
Xing Tong ◽  
Weipeng Fang ◽  
Shuaiqi Yuan ◽  
Jinyu Ma ◽  
Yiping Bai
Keyword(s):  
Bayesian Approach ◽  
Gas Explosion ◽  
Mine Gas

Application of Fault Tree Analysis Method in Gas Explosion Accident

2013 ◽  
Vol 709 ◽  
pp. 340-343
Author(s):  
Xiu Wang
Keyword(s):  
Coal Mine ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Gas Explosion ◽  
Minimal Path ◽  
Tree Analysis ◽  
Gas Concentration ◽  
Coal Mine Gas ◽  
Mine Gas ◽  
Minimal Path Sets

According to the gas explosion theory and the investigation of occurred gas explosion, the basic events that lead to coal mine gas explosion are summarized and the fault tree is worked out. Besides, the fault tree analysis is used for qualitative analysis. The minimal cuts sets, minimal path sets and structure importance are solved. Accordingly, the reasons of gas explosion are obtained, which can provide references for the prevention of coal mine gas explosion. The study showed that: the minimal cut sets of gas explosion is much(165) and the minimal path sets is small(4), and it is the major dangerous and harmful factors in coal mine. It that gas concentration must be strictly controlled and all sources of ignition should be eliminated is the basic and fundamental way to prevent mine gas explosion.

Application of Gas Explosion Nanometer Powder Suppression Material in Coal Mine Safety

2021 ◽  
Vol 217 (1) ◽  
pp. 240-254
Author(s):  
Rongzheng Liu ◽  
Meichang Zhang ◽  
Baoshan Jia
Keyword(s):  
Coal Mine ◽  
Mine Safety ◽  
Gas Explosion ◽  
Coal Mine Safety ◽  
Nanometer Powder

scholarly journals Visual Simulation and Case Inversion of Gas Explosion in Underground Mine

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Qiu Jinwei ◽  
Jiang Bingyou ◽  
Tang Mingyun ◽  
Zhou Liang ◽  
Ren Bo ◽  
...  
Keyword(s):  
Meteorological Parameter ◽  
Underground Mine ◽  
Visual Simulation ◽  
Ventilation Network ◽  
Simulation Technology ◽  
Gas Explosion ◽  
Emergency Plan ◽  
Impact Prediction ◽  
Parameter Field ◽  
Mine Gas

To truly represent the developing changes and spatiotemporal effects of gas explosion in underground mine, this paper discussed the field modeling and visual simulation technology of mine gas explosion. Through analyzing the characteristics of various field parameters, space geometric field models, physical attribute field models, and meteorological parameter field models were established to describe mine engineering, ventilation network, and explosion disaster process, respectively. Based on the generated model class and simulation timing flow of gas explosion disaster field, OpenGL technology was adopted to visualize the model of gas explosion disaster field, which simulated the overpressure propagation process of gas explosion shockwave and dynamic spread process of disaster gas, thereby to reveal the developing changes of gas explosion parameters in time and space. Taking the gas explosion accident that occurred in a certain mine in China as an example, the disaster process was inferred to examine the availability of the mine gas explosion disaster field model. The research achievements in the paper not only embody the great engineering value of visual simulation technology in the field of safety engineering but also provide references for accident impact prediction, assessment, and emergency plan.

Statistical Analysis on Coal Mine Gas Explosion and Optimization of Safety Input

2010 ◽  
Vol 143-144 ◽  
pp. 1316-1321
Author(s):  
Cang Yan Xiao ◽  
Li Wen Guo ◽  
Shu Zhao Chen ◽  
Yan Chao Yang
Keyword(s):  
Statistical Analysis ◽  
Coal Mine ◽  
Value Of Life ◽  
Mine Safety ◽  
Economic Losses ◽  
Gas Explosion ◽  
Coal Mine Safety ◽  
Coal Mine Gas ◽  
Mine Gas ◽  
Mine Accidents

This paper statistically analyzes the large coal mine gas accidents in China since 2006, and points out that explosion and gas outburst are the main reasons of gas accident, and focus in the future should be put on those serious accidents caused by gas explosion. Death toll of large gas accidents in 2009 is equal to that in 2008, which illustrates the importance of safety input in order to further improve the coal mine safety situation in China. In order to raise consciousness of enterprises on safety input, this paper puts forward the idea of integrating the value of life casualties’ loss into the analysis of loss in coal mine accidents and builds an optimization model of optimization of safety input based on maximization of economic benefit and thorough analysis of safety input, economic losses caused by coal mine accidents and loss of human life. With reference to foreign practices and related research, the value of life for each person is finally set from 5 million to 30 million. Finally it is proved through case study that the consideration of value of life is vital to improve the level of safety input and reduce mortality. Since 2005, the number of deaths caused by gas accident many years occupied the first coal mine accident in major categories. Therefore, the gas accident occurred in recent year statistical analysis, to take specific measures for improving the level of China's coal mine safety is important.

Research on the SDS + Castor Oil Aqueous Solution Used as Methane Absorption and Gas Explosion Suppression Material

2011 ◽  
Vol 685 ◽  
pp. 264-271
Author(s):  
Zeng Zhi Zhang ◽  
Hong Mei Xu ◽  
Na Gu
Keyword(s):  
Aqueous Solution ◽  
Coal Mine ◽  
Castor Oil ◽  
Volume Fraction ◽  
Explosion Chamber ◽  
Gas Explosion ◽  
Methane Absorption ◽  
Explosion Suppression ◽  
Water Based ◽  
Mine Gas

A kind of water-based material which can absorb mine gas and suppress gas explosion was designed for the purpose of keeping the coal mine safe. The anionic surfactant sodium dodecyl sulfate (SDS) was used as the main gas absorbent according to the micelle solubilization of surfactant, and castor oil was used as absorption enhancer in this material. Methane was regarded as a model of mine gas. The volume fraction of methane absorption was measured by head space gas chromatography. The state of the aggregates in the material was observed by transmission electron microscopy. The explosion suppression effect was tested by self-made explosion chamber which can simulate gas explosion. Also the methane absorption rate of the water-based material was tested in practice of coal mine. The results showed that the maximum volume fraction of methane absorption of the SDS + castor oil aqueous solution can reach up to 12.65%; with the addition of castor oil, the structure of aggregates in SDS aqueous solution system changed from spherical to lamellar, so it can provide greater non-polar microenvironment for methane; the water-based material can lower the maximum explosion pressure to some extent when it was sprayed into the explosion chamber in atomization condition before ignition; field test on methane absorption showed that the methane absorption ratio can reach up to 16.7%, which is much higher than the experimental value.

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