露天开采境界确定问题是采矿学科中具有重要意义的课题。本文只就静态法确定境界有关问题作些分析。对n经≥n境确定境界原则认为基本合理,但也存在不足之处;对n经≥n平均原则确定境界,在一般情况下认为不应采用,特殊情况可另行考虑。在分析上述问题基础上,提出按露天与地下开采每吨精矿获得盈利额相等原则(即露天与地下的总盈利额最大)确定露天开采境界是合理的,因为它补偿了。n经≥n境原则的不足,并取得露天与地下开采总盈利额最大的效果。 The problem of determining the level of open pit mining is of great significance in the mining field. This article only on static state to determine the realm of the state for some analysis. It is generally reasonable to determine the realm of n ≥ n territory, but there are also some shortcomings. For n ≥ n, the average principle is to determine the realm. In normal circumstances, it should not be adopted, and special cases may be considered separately. On the basis of analyzing the above problems, it is reasonable to put forward the principle of equal profit for every ton of concentrate under open pit and underground mining (that is, the total amount of total open-pit and underground profit) is reasonable because it is compensated. n The principle of the lack of ≥ n environment, and obtain the maximum total profit of open-pit and underground mining effect.