| Coal and gas outburst accident is a serious threat to the safety of coal mining. With the increasing depth of coal mining and the coal seam gas content gradually, coal and gas outburst accident rate is also growing, which directly effects the coal production and the safety of miners. Therefore, the research of coal and gas outburst danger and analysis of outburst coal seam and gas source accuratly and quantitativly is important to guarantee the coal mine safety production.The content and distribution of trace elements in different layers of coal was analyzed in this study through the collection and testing of coal samples in different layers by using Wolong Lake coal mine, Qidong coal mine, Renlou coal mine and Zhu Ji Xi coal mine as the research object. Analyzed the distribution and change rang of trace elements in different layers by taking Zhu Ji Xi coal mine as an example. Extracted the characteristics trace elements of each layer based on the distinguish of individual elements between different layers in order to compare seam.For further comparison of different coal seam, analyzed and tested the organic carbon isotope values in coal layer. Analyzed the significance of causes according to the connection between organic carbon isotope values in coal and coal forming plants. Comparing the coal seams with the distribution range of organic carbon isotope values in different layers.Through the analysis of Zhu Ji Xi coal seam gas including the component characteristics, carbon dioxide and methane carbon isotope value, explained the causes of the coal seam gas. Based on this, establish a quantitative analysis method of gas source and proportion using the principle of isotope tracer and mathematical means. The sample data of the different gas sources is needed to establish applicate this analysis method. Such as the isotopic values of for methane, ethane and carbon dioxide, which can be used for analysis of multiple gas sources. |
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