scholarly journals Study of the influence of the characteristics of loose residual coal on the spontaneous combustion of coal gob

2019 ◽  
Vol 8 (3) ◽  
pp. 689-701 ◽  
Author(s):  
Nan Li ◽  
Xuelong Li ◽  
Cai Shu ◽  
Wenlong Shen ◽  
Miao He ◽  
...  
Keyword(s):  
Spontaneous Combustion ◽  
Spontaneous Combustion Of Coal ◽  
Coal Gob ◽  
Residual Coal

scholarly journals A Study on Preventing Spontaneous Combustion of Residual Coal in a Coal Mine Goaf

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Yongjun Wang ◽  
Xiaoming Zhang ◽  
Yuichi Sugai ◽  
Kyuro Sasaki
Keyword(s):  
Spontaneous Combustion ◽  
Mine Ventilation ◽  
Ventilation Network ◽  
Leakage Flow ◽  
Coal Spontaneous Combustion ◽  
Economical Method ◽  
Long Period ◽  
Simulation Results ◽  
Spontaneous Combustion Of Coal ◽  
Residual Coal

The effectiveness of grouting scheme has been simulated to prevent the coal spontaneous combustion at a goaf in Haizi Colliery, China. The colliery has been operated for long period over 27 years and has a complex ventilation network including airflow leakages which could possibly lead to the spontaneous combustion of coal at goafs. Firstly, the mine ventilation simulator MIVENA was used to analyze the mine ventilation network airflows to control airflows in and out of working faces and goafs. As the second approach, numerical simulations were carried by the simulator FLUENT in order to predict spontaneous combustion of residual coal with leakage flow in the #3205 goaf. It was cleared that the goaf can be divided into three zones based on oxygen concentration in the goaf area. Finally, the numerical simulation results show that the slurry grouting method is able to be an effective and economical method by reducing porosity in the goaf area to prevent spontaneous combustion of residual coal.

Effect Analysis of Nitrogen Injection on the Variation of “Oxidation Zone” in Coal Mine Gob Based on Numerical Simulation

2016 ◽  
Vol 9 (1) ◽  
pp. 47-54
Author(s):  
Jing Shen ◽  
Mingran Chang
Keyword(s):  
Numerical Simulation ◽  
Coal Mine ◽  
Heat Dissipation ◽  
Spontaneous Combustion ◽  
Oxidation Zone ◽  
Effect Analysis ◽  
Mine Fire ◽  
Nitrogen Injection ◽  
The Difference ◽  
Residual Coal

One of the main reasons for coal mine fire is spontaneous combustion of residual coal in gob. As the difference of compaction degree of coal and rock, the underground gob can be considered as a porous medium and divided into “three zones” in accordance with the criteria. The “three zones” are “heat dissipation zone”, “oxidation zone” and “choking zone”, respectively. Temperature programming experiments are taken and numerical simulation with obtained experimental data is utilized to analyze the distribution of “three zones” in this paper. Different width and depth of “oxidation zone” are obtained when the inlet air velocity is changed. As the nitrogen injection has inhibition effect on spontaneous combustion of residual coal in gob, nitrogen is injected into the gob. The widths of “oxidation zone” are compared before and after nitrogen injection. And ultimately the optimum location and volume of nitrogen injection are found out.

Study on the preparation and inhibition mechanism of intumescent nanogel for preventing the spontaneous combustion of coal

Fuel ◽  
2022 ◽  
Vol 310 ◽  
pp. 122240
Author(s):  
Zhian Huang ◽  
Sainan Quan ◽  
Xiangming Hu ◽  
Yinghua Zhang ◽  
Yukun Gao ◽  
...  
Keyword(s):  
Spontaneous Combustion ◽  
Inhibition Mechanism ◽  
Spontaneous Combustion Of Coal

Multifaceted processes controlling the distribution of hazardous compounds in the spontaneous combustion of coal and the effect of these compounds on human health

2018 ◽  
Vol 160 ◽  
pp. 562-567 ◽  
Author(s):  
Marcos L.S. Oliveira ◽  
Kátia da Boit ◽  
Fernanda Pacheco ◽  
Elba C. Teixeira ◽  
Ismael L. Schneider ◽  
...  
Keyword(s):  
Human Health ◽  
Spontaneous Combustion ◽  
Spontaneous Combustion Of Coal ◽  
Hazardous Compounds

scholarly journals Experimental study on adsorbing of flue gas and its application in preventing spontaneous combustion of coal

2018 ◽  
Vol 36 (9-10) ◽  
pp. 1744-1754 ◽  
Author(s):  
Fei Gao ◽  
Cun-Bao Deng ◽  
Xue-Feng Wang ◽  
Xue-Ming Li ◽  
Feng-Wei Dai
Keyword(s):  
Power Plant ◽  
Adsorption Capacity ◽  
Flue Gas ◽  
Spontaneous Combustion ◽  
Factors Affecting ◽  
Generation Cost ◽  
Spontaneous Combustion Of Coal ◽  
Temperature And Pressure ◽  
Main Components ◽  
Emission Of Greenhouse Gases

We propose an experimental adsorption device, imitating the environment of a coal-mine goaf and the composition of the flue gas in Tashan Mine Power Plant. The characteristics of the coal adsorbing flue gas were studied with the atmospheric volumetric method. The factors affecting the seal of CO2 were analyzed and the effect of power plant flue gas on fire prevention in the goaf was investigated at normal temperature and pressure. It can be inferred from the experiment that N2, SO2, and H2O can also reduce CO2 adsorption capacity. The increase or decrease in pH can increase the adsorption capacity of CO2, which is apparently larger when the pH is decreasing than when the pH is increasing. The O2 adsorption capacity can evidently be reduced when the power plant flue gas is injected into the goaf. The activation energy of coal burned in air is greater than that of coal burned in flue gas, indicating that the use of power plant flue gas, with N2 and CO2 as the main components, to replace the traditional inert gas can not only save N2 generation cost, but also reduce the emission of greenhouse gases, while the power plant flue gas can be adsorbed by coal.

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