Influence of cavity structure on gas explosion characteristics in coal mine

2022 ◽  
pp. 117084
Author(s):  
Wei Liu ◽  
Chaomin Mu ◽  
Zhongqing Li
Keyword(s):  
Coal Mine ◽  
Gas Explosion ◽  
Cavity Structure

scholarly journals Sartre as prosecutor of occupational murder: notes from a People's Tribunal in a French mine (1970)

2021 ◽  
Vol 99 ◽  
pp. 167-176
Author(s):  
Pascal Marichalar ◽  
Gerald Markowitz ◽  
David Rosner
Keyword(s):  
Coal Mine ◽  
Public Prosecutor ◽  
Gas Explosion ◽  
The Public ◽  
Northern France ◽  
Publicly Owned

On February 4, 1970, in the Fouquières-lès-Lens coal mine in northern France, sixteen miners were killed in a gas explosion (“firedamp,” grisou in French). This was an accident like many others before it, yet with a relatively high number of fatalities. The public prosecutor concluded, as usual, that there was no case against the publicly owned mine. No investigation was to be carried out. The accident had been the work of fate, of bad luck.

Influence of Initial Position of Sliding Device on Premixed Methane/air Gas Explosion Flame at Driving Face in Coal Mine

2021 ◽  
pp. 1-23
Author(s):  
Yulong Duan ◽  
Yanling Yang ◽  
Yuanbing Li ◽  
Jun Xu ◽  
Yuzhu Zhang ◽  
...  
Keyword(s):  
Coal Mine ◽  
Initial Position ◽  
Gas Explosion

Numerical Analysis of Water Mist Flow Field for Gas Explosion Suppression in Upper Corner

2011 ◽  
Vol 71-78 ◽  
pp. 4848-4851
Author(s):  
Fan Mao Meng ◽  
Zhi Chao Liu ◽  
Zhi Zhong Liu
Keyword(s):  
Numerical Analysis ◽  
Flow Field ◽  
Coal Mine ◽  
Water Mist ◽  
Gas Explosion ◽  
Gas Concentration ◽  
Methane Gas ◽  
Gas Accumulation ◽  
Explosion Suppression ◽  
Mist Flow

The water mist is an economical and environmental agent for gas explosion suppression. It can be applied in the commonly gas concentration zones and the gas accumulation zones which is difficult to reduce the concentration of methane gas. By numerical analysis, this paper studies the effect of the direction and the number of the nozzles, and the distance form the nozzles to the wall at X direction in upper corner in coal mine. For gas explosion suppression in upper corner, it can use one nozzle which direction is same as the wind and the distance is 2m.

scholarly journals A Novel Design of Rescue Capsule considering the Pressure Characteristics and Thermal Dynamic Response with Thermomechanical Coupling Action Subjected to Gas Explosion Load

2017 ◽  
Vol 2017 ◽  
pp. 1-12 ◽  
Author(s):  
Xiaowei Zhai ◽  
Shibo Wu ◽  
Kai Wang ◽  
Xiaokun Chen ◽  
Haitao Li
Keyword(s):  
Dynamic Response ◽  
Coal Mine ◽  
Coupling Effect ◽  
Design Method ◽  
Thermomechanical Coupling ◽  
Structural Safety ◽  
Coupling Mechanism ◽  
Gas Explosion ◽  
Explosion Load ◽  
Mine Rescue

To ensure the structural safety and reliability of coal mine rescue capsule in disastrous surroundings after gas explosion, in this paper, the thermomechanical coupling effect on a certain structure subjected to gas explosion was analyzed, and then a novel rescue capsule with a combination of radius and square features was designed according to the underground surroundings and relevant regulations on mine rescue devices. Foremost, the coupling mechanism of thermal-fluid-solid interaction between gas explosion shock wave and rescue capsule and the thermal dynamic response of the capsule subjected to explosion load of gas/air mixture was investigated and revealed by employing LS-DYNA. The variation laws and characteristics of stress field, displacement field, and temperature field of the capsule were analyzed based on the simulation results. Results show that the structural safety, tightness, and reliability of the capsule meet the requirements of the national safety regulations. The design method presented in this work provides a new thought for design of coal mine rescue capsule.

The Accident Process Research of Gas Explosion Based on Situation Cognition

2011 ◽  
Vol 356-360 ◽  
pp. 666-670
Author(s):  
Lian Hua Cheng ◽  
Shu Gang Li ◽  
Hai Fei Lin
Keyword(s):  
Production Process ◽  
Work Environment ◽  
Coal Mine ◽  
Interaction Mechanism ◽  
Major Change ◽  
Process Research ◽  
Gas Explosion ◽  
Work Process ◽  
Mine Production ◽  
Unsafe Behavior

Accident is undesired to anyone. But the research shows that the main cause of accident is unsafe behavior. The interaction mechanism of accident system was analyzed in the process of gas explosion through typical accidents and the conclusion was that the accident was occurred because unsafe behavior induced the dangerous factor in work environment. In order to further acquaint of it, the situation cognition of workers in the coal mine production process was analyzed with the research of aviation. The cognition of safe information in work process was affected by workload, goal, work habituation and others. As workload increased, goal strengthened, the attention apperceived safe information is weaken and the major change of safe information wasn’t apperceived immediately in work environment, and the accident was happened in conditions of unsafe behavior. Finally, the accident model based on situation cognition was posed and some measures were proposed.

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.

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