本论文针对大水头煤矿东108综放面煤层高瓦斯易自燃特点，综合采取现场采空区实测和实验室煤自然发火测定等技术手段，辅以计算机数值模拟和理论分析等方法，研究了采空区自燃“三带”及其范围变化，采空区危险区域评估及煤自燃与瓦斯的耦合研究，为采空区安全隐患的治理提供了依据。首先，在东108综放面采空区布置束管监测系统和温度传感器，得到了采空区温度和其他指标气体的变化规律，运用最小二乘数据拟合函数特性，结合自燃“三带”理论定义了本矿自燃“三带”范围划分方法。得出下隅角氧化带宽度大于上隅角的氧化带宽度；氧化带的宽度与工作面推进度相关，推进度越大，氧化带宽度越小。在矿井正常生产条件下，散热带宽度为46m，氧化带宽度为17m，工作面后方63m之后为窒息带。其次，运用Fluent软件模拟计算采空区内煤自然发火情况，基于氧浓度指标判定了采空区自燃“三带”的范围，并分析了不同漏风量对自燃“三带”范围的影响。最后，对于东108综放面采空区存在的自然发火危险性区域和采空区瓦斯爆炸隐患，划分了东108工作面采空区内瓦斯与氧气相互混合达到爆炸危险的耦合区，并进行采空区耦合区判断，结果表明：耦合区多处于上隅角采空区氧化带内；指出若该矿采空区发生煤自然发火，则该耦合区有发生瓦斯爆炸的危险。

This study is based on coal seam easily spontaneous combustion and highly gas features of east 108 fully mechanized top-coal caving face, comprehensive utilization of technological means, such as goaf area measured in site and coal spontaneous combustion measured in Lab, and supplemented by computer numerical simulation and theoretical analysis method, studying on spontaneous combustion of “three-zone” in goaf and its scope change, evaluating danger zone in goaf and mined-out area of coal spontaneous combustion and gas coupling research, to provide the basis for treating fire hazard in goaf. First, we establishing monitoring system and temperature sensor in goaf of east 108 fully mechanized top-coal caving face, getting the change rule of the gas temperature and other indicators. Using least squares fitting function features and the theory of spontaneous combustion of “three-zone” to define the scope of the mine spontaneous combustion "three zones" division method. It is concluded that the down-corner angle oxidation zone width is greater than the width of the oxidation zone in upper corner, and the width of the oxidation zone associated with the degree of working face advancing, propulsion, the greater the oxidation zone width is smaller. Under the condition of normal production of mine, the cooled zone width is 46 m, width of oxidation zone is 17 m, behind the working face 63 m after suffocative zone. Second, the coal spontaneous combustion in goaf calculated by using Fluent software to simulate, based on the oxygen concentration index to determine the scope of goaf spontaneous combustion "three zones", and analyzes the different leakage air volume influence on spontaneous combustion "three zones" range. Finally, east of 108 fully mechanized top-coal caving face goaf spontaneous combustion risk existing in the region and goaf gas explosion hazard, defines the goaf gas mixed with oxygen within reach explosion danger of coupling region, and does the east 108 working face goaf coupling zone judgment, the results showed that: coupling zone is located in the goaf in the oxidation zone in upper corner, and if the mine goaf coal spontaneous combustion, the coupling zone to have the risk of gas explosion.