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为了研究荆各庄矿复采与原生煤层工作面的自然发火规律,采用元素分析、红外光谱分析和程序升温实验,对荆各庄矿的1090与3320工作面的复采区域与原生煤样进行自燃特性实验研究。研究表明:由于早期开采机器的切割或者外力作用,导致煤分子链断裂,产生大量甲基、亚甲基,同时煤样提前与氧有了接触,形成了很多羟基以及新的含氧官能团,导致复采煤样羟基和含氧官能团增多,自燃倾向性变强,宏观表现为复采煤样CO释放量以及O_2消耗量均要高于原生煤样,并且复采特征温度也要早于原生煤样。说明复采煤样氧化性变强,更易自燃。
In order to study the law of spontaneous combustion in Jinggezhuang coal mining face and primary coal seam face, elemental analysis, infrared spectrum analysis and temperature programmed experiment were used to study the recovery area of primary and secondary coal samples from 1090 and 3320 faces in Jinggezhuang Mine Experimental Study on Spontaneous Combustion Characteristics. The research shows that due to the cutting or external force of the early mining machine, the molecular chain of the coal breaks, a large amount of methyl and methylene are produced, and the coal sample comes in contact with oxygen in advance, forming many hydroxyl groups and new oxygen-containing functional groups, The content of oxygen and oxygen-containing functional groups increased and the spontaneous combustion tended to be stronger in the coexite samples. The macroscopic results showed that the CO emission and the O 2 consumption of the compound coal were higher than that of the primary coal, and the recovery temperature was earlier than that of the primary coal kind. Description of complex coal samples become more oxidative, more likely to spontaneous combustion.