为对矿井突水方向和速度以及突水范围等进行预测分析,采用无向图宽度优先搜索路径方法,以巷道节点标高为权重,给出矿井突水路径算法;通过对矿井突水方向和速度等进行预测分析,提出水灾影响范围预测方法.研究结果表明:利用宽度优先搜索算法进行水灾影响范围预测方法,可以通过突水范围和突水时间计算出突水流量,并根据突水流量计算出下一步突水范围. In order to predict and analyze the direction and speed of water inrush and the range of water inrush, the method of undirected map width first search is adopted to calculate the elevation of roadway node as the weight, and the water inrush path algorithm is given. Etc. The prediction method of flood influence range is put forward.The research results show that the method of width-first search can predict the flood impact range, and the inrush flow can be calculated by the water inrush range and water inrush time, Next water burst range.