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编辑同志: 贵刊1980年第2期刊登了刘文会等撰写的《对爆破参数W_n、W_d、a、h_o及L_z的初步探讨》文章,该文作者根据露天矿的大量实践进行了理论分析。作为学习和讨论,我把自己不成熟的意见供编辑和作者参考。文章以图6为中心说明用优选法优选炮孔间距α值,我认为可以用函数求极值的方法来求得,这样比较简单。当s(每个炮孔所承担的台阶底盘爆破面积)取得极大值时,α=2~(1/2)W_n(抵抗线限度),W_d(底盘抵抗线)=(2~(1/2))/2W_n,即α=2W_d,m=β/W=2。这样较
Editorial comrades: your issue No. 2, 1980 published Liu Wenhui et al., “A preliminary discussion of the blasting parameters W_n, W_d, a, h_o and L_z” article, the author based on a large number of open-pit mines theoretical analysis. As a learning and discussion, I put my own immature opinions for editors and authors reference. The article in Figure 6 as the center shows the preferred method of optimizing the distance between the hole a value, I think the function can be obtained by the extreme value of the method, which is relatively simple. When s (the blasting area of the stepped chassis borne by each borehole) reaches the maximum value, α = 2 ~ (1/2) W_n (resistance line limit), W_d (chassis resistance line) = (2 ~ 2)) / 2W_n, that is, α = 2W_d and m = β / W = 2. This is more