基于平行断面法的固体矿产储量估算方法

Estimation method of solid mineral reserves based on parallel section method

常规对于沉积物源型矿床储量的估算多采用剖面法,此方法无法准确确定矿体边界基点位置,使得矿产储量估算的误差较大。而平行断面法适用于沉积物源型矿床,在这种矿床中,矿物的分布规律主要受到物源在空间中的变化影响,因此在构建矿体模型时,可以将不同高程的平面投影在一起,得到一个立体的矿体模型。为此,本文提出基于平行断面法的固体矿产储量估算方法。根据矿体品位与可采厚度,提取目标区的约束边界,依据图形数据结构并结合现行工业指标,确定矿体边界基点位置,继而对矿体边界进行圈定,通过分析矿层变异性,采用平行断面法计算矿体边界内的矿带区域变程,获取矿体块段体积,以此为依据,对矿层移动角与矿体密度进行求取,进而求估算出固体矿产储量。以实际矿区为算例,对所提方法的估算性能进行验证,结果表明,所提方法的估算误差较小,估算结果更具可靠性。

The profile method is often used to estimate the reserves of sediment-source deposits.This method can not accurately determine the base point of the boundary of the ore body,which leads to a large error in the estimation of mineral reserves.The parallel section method is suitable for sediment-source type deposits,in which the distribution of minerals is mainly affected by the change of provenance in space.Therefore,when building the ore body model,planes with different elevations can be projected together to obtain a three-dimensional ore body model.Therefore,a method of estimating solid mineral reserves based on parallel section method is proposed in this paper.According to the ore body grade and mineable thickness,the constraint boundary of the target area is extracted,the base point of the ore body boundary is determined according to the graphical data structure and combined with the current industrial indicators,and then the ore body boundary is delineated.By analyzing the mineral layer variability,the parallel section method is used to calculate the regional variation of the ore belt within the ore body boundary,and the block volume of the ore body is obtained.The angle of stratum movement and the density of ore body are calculated,and then the solid mineral reserves are estimated.Taking the actual mining area as an example,the estimation performance of the proposed method is verified,and the results show that the estimation error of the proposed method is small and the estimation results are more reliable.