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通过建立综放采空区三维非稳定风流场、温度场及热力风压的联合解算数学模型，运用有限单元和有限差分法进行较深入的数学模拟分析和数值解算，结合现场观测及分析结果，得出了综放采空区内可能的遗煤自燃区域分布范围、空间形态及其影响因素。并就模拟原型的实际情况，给出其合理的工作面推进速度。
Through the establishment of mathematical model of three-dimensional unsteady wind flow field, temperature field and thermal wind pressure in goaf of fully mechanized caving mining area, the finite element method and finite difference method are used to conduct mathematical simulation and numerical solution. Combined with the field observation and analysis As a result, the distribution range, space shape and influencing factors of spontaneous combustion of coal left in fully mechanized goaf were obtained. And on the actual situation of the simulation prototype, given its reasonable speed of advancement of the work surface.