为了从网络结构及其对气体渗流控制角度揭示采动作用下采空区煤自燃与瓦斯耦合灾害形成机理，以典型U型开采工作面为研究对象，首先利用离散元软件建立等比例工作面开采模型，采用分步开挖方法模拟工作面开采过程，得到采空区孔隙率时空演化规律，并采用三维重建和逆向工程技术构建不同开采时期等价采空区裂隙网络模型，采用分形理论对不同位置裂隙发育程度进行定量表征；然后建立采空区三维气体渗流实验系统，模拟采空区裂隙破坏与渗流环境，分析不同供风量、不同开采时期、不同热源情况下采空区气体渗流和温度演化规律；最后，实现COMSOL多场耦合软件对PFC模拟孔隙率结果读取，提出基于渗流-热力学的采空区裂隙网络与气体渗流控制作用模型，并结合物理实验和数值模拟结果对比对模型进行修正，划分采空区煤自燃与瓦斯耦合灾害空间危险区域，为采空区煤自燃与瓦斯耦合灾害空间特性分析和防治提供理论依据。

In order to reveal the evolution mechanism of coal spontaneous combustion and methane coexisting hazards in goaf from the view of network structure and its perspective on gas seepage control, take the typical U mining face as the typical research object, firstly an equal ratio working face mining model is established by using discrete element software and stepwise excavation method is used to simulate the mining process. The spatial-temporal evolution rule of porosity in goaf is obtained. Three dimensional reconstruction and reverse engineering technology are used to construct the fracture network model of equivalent goaf in different mining periods. Fractal theory is applied to quantitatively characterize the degree of fracture development in different locations. Then the three-dimensional gas seepage experimental system of goaf is built to simulate the fracture failure and seepage environment of the goaf, and analyze the gas seepage and temperature evolution law of goaf under different air supply volume, different mining period and different heat sources. Finally, COMSOL software to read the PFC simulation results of porosity is realized , proposed goaf seepage zone of fracture network and gas seepage control model based on thermodynamics, and compared to the model simulation results with the physical experiment and numerical classification of mined out space area of coal spontaneous combustion and gas coupling hazard area, provide a theoretical basis for the for the analysis and prevention of goaf coal spontaneous combustion and gas coupling disaster spatial characteristics.