本文借助于复势概念,对典型采场导出了采空区内气体流动速度及风压的函数表达式,并绘制了采场特征图.在此基础上,研究了下面四个问题:(1)导出了采空区内任一点处瓦斯浓度公式;(2)确定了采空区内易燃的区域,并证明了在一股情况下的只要不从工作面以外的地方向采空区流入新鲜空气,采空区是不会自燃约;(3)说明了调压控制自燃的实质;(4)给出了在工作面及时发现新鲜空气不从工作面进入采空区的简单方法,这对控制采空区自然是非常有利的。 Based on the concept of complex potential, this paper deduces the function expression of gas flow rate and wind pressure in goaf for a typical stope, and draws the stope characteristics map. On the basis of this, the following four problems are studied: (1 ) To derive the gas concentration formula at any point in the gob area; (2) to determine the flammable area in the gob area and to prove that in one case, inflow into the gob area (3) Describe the essence of self-ignition with pressure control; (4) Give a simple method of finding fresh air in the working face in time without entering the goaf from the working face, which It is of course very advantageous to control the goaf.