A new method for determining muckpile fragmentation formed by blasting

IF 0.9 4区材料科学 Q3 Materials Science

Journal of The South African Institute of Mining and Metallurgy Pub Date : 2023-01-17 DOI:10.17159/2411-9717/1104/2022

A. Tosun

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引用次数: 0

Abstract

Muckpile fragmentation formed by blasting depends on the specific charge factor, the discontinuities in the rock mass, and the rock strength. Determination of the discontinuity characteristics and rock strength is a long and difficult process. These two parameters are directly associated with the rock drilling speed. Therefore, it is the drilling speed of the machine used for the blast-hole, rather than the blasthole discontinuity characteristics and rock strength parameters, that is used in the prediction of muckpile fragmentation before blasting. Primarily, it has been suggested that the muckpile fragmentation values can be correctly determined by establishing correlations between the efficiency of the loader and muck pile fragmentation, since fragmentation is directly correlated with the former parameter. Subsequently, a correlation predicting the drilling speed of the drill machine was developed according to the discontinuity characteristics of the blasting surface and the rock strength. Finally, a correlation was developed predicting muckpile fragmentation according to the specific charge factor and the drilling speed of the drill machine The data was obtained by conducting blasting tests in two different limestone quarries.

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一种确定爆破形成的堆屑破碎度的新方法

爆破形成的泥堆碎片取决于特定的电荷因子、岩体中的不连续性和岩石强度。确定不连续性特征和岩石强度是一个漫长而困难的过程。这两个参数与岩石钻孔速度直接相关。因此，在爆破前预测淤泥堆碎片时，使用的是用于爆破孔的机器的钻孔速度，而不是爆破孔的不连续性特征和岩石强度参数。首先，有人建议，通过在装载机的效率和淤泥堆碎片之间建立相关性，可以正确地确定淤泥堆碎片值，因为碎片与前一个参数直接相关。随后，根据爆破表面的不连续性特征和岩石强度，建立了预测钻机钻孔速度的相关性。最后，根据装药比系数和钻机的钻孔速度建立了预测堆渣碎片的相关性。数据是通过在两个不同的石灰石采石场进行爆破试验获得的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of The South African Institute of Mining and Metallurgy 工程技术-矿业与矿物加工

CiteScore

1.50

自引率

11.10%

发文量

审稿时长

4-8 weeks

期刊介绍： The Journal serves as a medium for the publication of high quality scientific papers. This requires that the papers that are submitted for publication are properly and fairly refereed and edited. This process will maintain the high quality of the presentation of the paper and ensure that the technical content is in line with the accepted norms of scientific integrity.