【作者】 张福勇；

【导师】 文虎； 崔洪明；

【作者基本信息】 西安科技大学 ， 安全技术及工程， 2011， 硕士

【摘要】 柠条塔矿属易自燃矿井,矿区内曾发生地面煤仓、周边小窑采空区、煤层露头自燃现象。该矿区地表漏风情况严重,容易引起采空区浮煤自燃,加强对该矿区自燃规律及特征温度的深入研究对该矿的煤自燃预测预报及安全生产具有重要意义。本论文采用理论和实验相结合的方法,对柠条塔矿2^-2煤进行了程序升温实验和自然发火实验,通过对实验过程中的各个自燃特性参数及指标气体进行分析,确定该煤层的自燃规律。并通过对实验结果进行分析,确定临界温度、裂解温度和裂变温度等特征温度点的温度范围及相应温度点煤自燃特性参数及指标气体的变化规律,进而确定其相应特征温度的表征参数,为柠条塔2^-2煤自燃预测预报提供参考依据。通过对柠条塔2^-2煤煤样进行热重分析实验,对实验所得75组TG曲线和DTG曲线进行分析,在每组曲线上得出了煤样的高位吸附温度、临界温度、干裂温度、活性温度、着火点温度等各个特征温度,结合煤自燃程序升温实验及自然发火实验确定各个特征温度范围。最后着重分析实验条件中粒度、氧浓度以及升温速率对各特征温度点及热重曲线的影响规律,很好的反应了煤的氧化反应过程,对于判断柠条塔2^-2煤的自燃倾向性及进行煤自燃预测预报具有一定的指导意义。更多还原

【Abstract】 Ningtiaota Coal Mine belongs to the coal mines that are easy to spontaneous combustion, in the coal mining area, spontaneous combustion once occurred in bunker, the surrounding small ground coal goaf and furnace outcrops The mine air leakage was severe, easy to result in spontaneous combustion of goaf float coal, strengthen in-depth study on the spontaneous combustion laws and characteristic temperature are significant for prediction of spontaneous combustion and safety production of the coal mine.In this paper, combined with theories and experiments, program temperature experiments and spontaneous experiments were carried out on Ningtiaota 2^-2 coal samples, through the analysis of each spontaneous combustion characteristic parameters and index in the experiments process, the spontaneous combustion rule was determined. And through the analysis of the test results, temperature range of the critical temperature, pyrolysis temperature and fission temperature and the spontaneous combustion characteristic parameters and change laws of index gases, was determined, parameters of the corresponding characteristic temperature were obtained, which could provide reference for prediction of coal spontaneous combustion of Ningtiaota 2^-2 coal seam.Through thermogravimetric analysis experiment of the coal samples, according to the experiment results, 75 group TG curves and DTG curves were analyzed, in each suite of curve, high adsorption temperature, the critical temperature, temperature, active temperature, dry ignition temperature were obtained, combined with program temperature experiments and spontaneous experiments, various characteristic temperature range were determined. Finally focuses on analyzing influence rules of the grain size, oxygen concentration of heating rate on each feature temperature point and thermogravimetric curve, which were good reflection of the coal oxidation reaction process, and were significant for judgment of the self-ignition orientation and prediction of coal spontaneous combustion of Ningtiaota 2^-2 coal seam.更多还原