Chengzhuang Coal Mine9~#Coal Gangue Spontaneous Combustion Characteristics And Stacking Parameters Of Research

My country is rich in coal resources, Other poor energy determines the characteristics of energy consumption structure in China, Coal is still occupied the main position, The consumption of coal resources in our country has already reached68%of the overall energy consumption in our country, Geo-hazards and coal consumption continues to increase year by year. At the same time, With the improvement of mining mechanization, Coal gangue output soared, These solid waste with tons of coal by10%～20%of output. Coal gangue because of its special physical and chemical properties of substances, Due to the mining area ecological destruction and environmental pollution is very serious, Cause such as air pollution, Water pollution, Occupation of cultivated land and other serious social problems and environmental problems. Especially severe gas produced by the spontaneous combustion coal gangue mountain, especially serious pollution to the surrounding environment, Caused by coal mine environment is deteriorating. This article start from the chemical physical properties of coal gangue, Starting from the mechanism of coal gangue spontaneous combustion, Coal gangue spontaneous combustion conditions, Spontaneous combustion process experienced by carried on the thorough analysis, Indicates that the internal and external factors caused by coal gangue spontaneous combustion; Through the industrial analysis of coal samples, Component analysis and heat oxidation experiment, thermogravimetric experiments of research, Mastered the chengzhuang coal mine of9#coal gangue spontaneous combustion characteristics, determine the gangue spontaneous combustion prediction index of the early, For early prediction of the coal gangue spontaneous combustion provides scientific basis, For the new the prevention of spontaneous combustion of coal gangue piles have played an important guiding role. Through experimental research on characteristics of9#coal gangue spontaneous combustion, And combined with draw lessons from the successful experience of domestic coal gangue heap management projects, For the prevention of chengzhuang coal mine9#coal gangue spontaneous combustion has laid a solid foundation. System, scientific and perfect design of chengzhuang coal mine coal gangue piled up.The main conclusions are as follows:1. coal gangue spontaneous combustion of three conditions:①. The self-ignition orientation in itself, which has low temperature oxidation ability;②. With continuous ventilation oxygen supply conditions;③. Gangue heap to accumulation of heat. There are many factors that can influence on spontaneous combustion of coal gangue. The main internal factors are pyrite content, the content of coal gangue coal;the main external factors are particle size, how many water molecules, how to the influence of the pile.2. Through the analysis of the experimental results on the9#gangue industrial analysis and composition know,9#gangue is not easy to spontaneous combustion of coal gangue, Coal gangue of iron sulfide oxidizing reaction with oxygen at room temperature, Oxidation heat release is a major cause of lead to its spontaneous combustion. Chengzhuang coal mine sign of9#coal gangue spontaneous combustion gases should be given priority to with CO, C2H4and C2H2is complementary to grasp the coal gangue spontaneous combustion. CO concentration continued to increase, rising rate is accelerated, indicates that coal gangue began to rapid oxidation; Detect C2H4, the temperature of coal gangue has up to200～210℃; The emergence of C2H2shows that the temperature of coal gangue has more than220℃.3. By means of chengzhuang coal mine thermogravimetric experiment study of9#coal gangue samples, coal gangue moisture evaporation stage T1is95.6℃, oxygen weight stage T2is371.4℃, ignition point T3is449.8℃, combustion stage T4is629.5℃, Determine the characteristics of gangue spontaneous combustion process parameters and quality parameters such as temperature change. 4. Coal gangue pile of adopt the method of hierarchical compaction. Piled up in the strict control of coal gangue during the process of compaction degree, to prevent chengzhuang coal mine9#coal gangue spontaneous combustion. The yard clean up sealed seepage prevention in the first place, then layered stack, in the heart of the stacking process of gangue compaction, spread a layer of loessin its at the same time, reach the required height, Its overall casing cap, to afforest.5. According to the selection of conveyor field actual landform features and the requirements to prevent soil erosion and conveyor field of security, The gangue field wall masonry block is the main project of the gangue, the construction of drainage system, Packway and step stone masonry engineering steps, eventually period covering greening projects.