scholarly journals Coal quality characteristics and coal accumulation patterns of seam No.4 at medium depth in Longting mining area, Weibei P-C Coalfield

2020 ◽  
Vol 514 ◽  
pp. 022082
Author(s):  
Chunjuan Pan ◽  
Hui Wang ◽  
Yuhai Fan ◽  
Junfeng Wang ◽  
Sheng Cui
Keyword(s):  
Mining Area ◽  
Quality Characteristics ◽  
Coal Quality ◽  
Coal Accumulation

scholarly journals The Application of an Improved Fuzzy Comprehensive Evaluation in Coal Quality Rating: The Case Study of China

2022 ◽  
Vol 9 ◽  
Author(s):  
Feng Cai ◽  
Lingling Yang ◽  
Yuan Yuan ◽  
Farhad Taghizadeh-Hesary
Keyword(s):  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Mining Area ◽  
Utilization Efficiency ◽  
Weighting Method ◽  
Coal Quality ◽  
Carbon Neutrality ◽  
Quality Stability ◽  
Quality Rating

Coal quality rating can help reduce greenhouse gas emissions, solving the global warming problem. It becomes more important as the carbon neutrality by the mid-21st century agreement is accepted by 195 countries, including China. In this paper, an improved fuzzy comprehensive evaluation method is introduced for coal quality rating. The data used in this work are of the Hostolgoi coalfield of the Xinjiang Province of China. Six industrial analysis indicators are determined as evaluation factors by taking the coal samples of different coal seam depths in the mining area. The super-standard multiple methods and the double-weight super-standard weighting method are combined to form a comprehensive weight. The results show that most of the coal samples of this coal mine are at grades I–II, and the overall coal is with good-quality stability. The evaluation results can improve the coal utilization efficiency and provide scientific guidance for evaluating and exploiting coal resources in coal geological exploration.

Research on the Characteristics of Gas Geology in Yongshanqiao Mining Area, Jiangxi Province

2012 ◽  
Vol 164 ◽  
pp. 511-516
Author(s):  
Zhi Gen Zhao ◽  
Ming Ming Zhang ◽  
Jia Ping Yan
Keyword(s):  
Emission Rate ◽  
Mining Area ◽  
Geological Structure ◽  
Controlling Factors ◽  
Jiangxi Province ◽  
Coal Seams ◽  
Gas Emission ◽  
Gas Generation ◽  
Coal Quality ◽  
Geological Factors

The coal and gas outburst is very serious in Yongshanqiao Mining Area of Jiangxi province, so it is of significance to research the characteristics of gas geology and their controlling factors. Based on the statistical analysis of gas data during coal exploration and coal mining, the regularity is revealed of the characteristics of gas geology in Yongshanqiao Mining Area. From east to west and from south to north, the relative gas emission rate and the absolute gas emission rate tend to increase, the frequency and intensity of coal and gas outbursts rise, the gas contents also tend to increase. The controlling factors of characteristics of gas geology in Yongshanqiao Mining Area are researched in this paper. The work reveals that: corresponding to characteristics of gas geology, the distribution characteristics of coal quality, the characteristics of geological structure and the lithology characteristics of the roof and the floor of the coal seams in Yongshanqiao Mining Area present regular changes, and are all favorable to gas generation and gas preservation. So, the characteristics of gas geology in Yongshanqiao Mining Area are the result of comprehensive effects by geological factors

Coal Quality Characteristics and Inflaming Retarding Mode of Indonesia Coal in the Large Power Statdion

2013 ◽  
Vol 395-396 ◽  
pp. 223-229
Author(s):  
Gang Chen ◽  
Jian Lu ◽  
Wei Su ◽  
Hong Liang Zhang
Keyword(s):  
Power Plant ◽  
Spontaneous Combustion ◽  
Quality Characteristics ◽  
Low Temperature Oxidation ◽  
Coal Quality ◽  
Large Power ◽  
Temperature Oxidation ◽  
Advantages And Disadvantages ◽  
Development Direction ◽  
Oxidation Characteristic

this paper introduces the main parameters of the mining and arrival coal quality, and analyzes the low temperature oxidation characteristic of Indonesia coal through thermogravimetric test; meanwhile, the mechanism of spontaneous combustion of Indonesia coal is clarified, the advantages and disadvantages of various inflaming retarding methods are compared, and the development direction of inflaming retarding of Indonesia coal in the power plant is pointed out.

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