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矿坑涌水是矿山地下开采面临的首要问题,合理的涌水量预测方法是目前国内外研究的热点和难点所在。本文以湖南省道县铁锰矿Ⅱ矿体—50 m开采水平为例,利用有限差分数值方法对矿坑开采的涌水量进行模拟与分析。计算结果表明,涌水量主要来自于车子江的补给,但东部、南部、北部及降雨的补给量所占比例增大,说明Ⅱ矿体涌水量来源较广泛。综合分析,数值法所计算出的不同季节、不同雨强特征的涌水量,更符合矿区实际条件,模拟结果可以作为矿区开采设计的依据。
The mine gushing is the primary problem that the underground mine faces, and the reasonable forecasting method of the gushing water quantity is the hot point and the difficult point at home and abroad. In this paper, we take the level of 50m mines of Fe-Mn ore Ⅱ in Daoxian County, Hunan Province as an example, and simulate and analyze the water inflow of pit mining by finite difference numerical method. The calculation results show that the inflow mainly comes from the supply of the Chekiang River, but the proportion of recharge in the east, south and north increases, which indicates that the source of Ⅱ ore body inflow is more extensive. According to comprehensive analysis and numerical method, the water inflow in different seasons and different rainfall intensity characteristics is more in line with the actual conditions of the mining area. The simulation results can be used as the basis for mining design.