煤层自燃火灾严重威胁着我国矿井安全生产，其可能引发瓦斯、煤尘爆炸事故，酿成人员伤亡等的重大恶性事故。高瓦斯矿采空区浮煤自燃更是我们急需解决的问题，它直接影响矿井工作面的安全生产。 综采放顶煤技术对矿井实现高产高效起到重要作用。但是，由于综放面开采煤层厚度大，尤其是采空区“两道”“两线”顶煤放出率低，造成“两道”“两线”处遗煤量较多，高瓦斯矿井为减小采空区瓦斯浓度，实施高抽巷和瓦斯排放专用巷对采空区瓦斯进行抽放，加大了采空区漏风，增加了浮煤自燃危险性。因此，准确判定综放采空区在抽放条件下浮煤自燃危险区域的位置是预防和扑灭采空区自然发火的关键。 本文以黄岩汇煤矿15109工作面为研究背景，从高瓦斯矿井抽放条件下综放采空区浮煤自燃的特点出发，对其采空区在高抽巷及瓦斯排放专用巷同时运行条件下的漏风流场及氧浓度分布进行数值模拟研究。首先，在目前的煤自然发火机理、渗流力学、自然发火预测、自燃危险区域判定及数值模拟研究现状的基础上，通过实验模拟测定煤层自然发火相关特性参数，利用相关学科知识，建立综放采空区在高抽巷及瓦斯排放专用巷同时运行条件下气体渗流预测模型，对其进行数值模拟计算。然后，通过改变高抽巷抽采负压来研究其对采空区“三带”的影响。最后，根据实际现场观测，对综放采空区在高抽巷及瓦斯排放专用巷同时运行条件下采空区自燃危险区域进行静态划分，验证建立的数学模型的可靠性和准确性。研究结果对指导同类型矿井采空区煤自燃防治具有极大的意义。

The coal seam spontaneous fire is a serious threat of mine safety in production in our country. Which can cause gas and coal dust explosion，and major fatal accidents of casualties. The goaf float coal spontaneous combustion of the high gas mine is a problem we need to solve, which directly affects the mine safety production of working face. The technology of fully mechanized caving coal face plays an important role to the mine achieve high production and efficiency. However, the low efficiency of mining upper coal has caused “two lines”, “two laneways” legacy a large number of floating coal. The high gas mine drainages gas by using the high drainage way and gas emissions special lane to reduce the gas concentration, which increases the air leakage and the coal spontaneous combustion dangerousness of the goaf. So, the key to prevent coal mine fire and exterminate it is to ascertain the location of high temperature site. The paper, from the goaf float coal spontaneous combustion characteristics of fully mechanized gob under the condition of gas drainage, researched the flow field of the air leakage and the oxygen concentration distribution of the goaf by numerical simulation method, which was based on the 15109 workface of the Huang Yanhui mine. First, the article was based on the current mechanism and prediction and dangerous area determination of the coal spontaneous combustion, seepage flow mechanics and the research situation of numerical simulation, which determined the relevant characteristic parameters of coal seam spontaneous combustion by the experimental simulation, and established the gas seepage prediction model of the fully mechanized gob under the condition of the high drainage way and gas emissions special lane were worked, and calculated it by numerical simulation way. Second, researching the influence of the goaf “Three Zone” by changing the negative pressure value of the high drainage way. Finally, according to the actual observation dates, the article divided the statical coal spontaneous combustion dangerous area of the goaf, and confirmed reliability and accuracy of the established mathematical model. The results of the study are important for guiding the same type mine to prevent coal self-ignition in goaf.