分段崩落法破碎低强度稳定高品位铁矿的高效工艺方案研究

IF 0.6 Q3 MULTIDISCIPLINARY SCIENCES
A. Kosenko
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引用次数: 0

摘要

介绍。富铁矿的主要部分(73%)开采于Kryvyi Rih铁矿盆地,其中大部分(1.605亿吨)强度低,稳定性差。问题陈述。边坡开挖最重要的作业之一,是钻爆作业,以形成一个补偿空间,在稳定性、尺寸和锤击上具有最大的目的,它显著影响运输车辆的生产能力和破碎加工综合体,提取强度低、稳定性好的富铁矿石的质量和完整性。目的是在考虑应力-应变状态、有效井长和矿石破碎质量的情况下,开发出一种高效的破碎低强度稳定富铁矿储量的工艺方案。材料和方法。对分段崩落法开发系统的结构和功能进行了分析,对补偿硐室露头参数进行了数值计算分析和评价,对提高破碎过程效率的实践经验和科学成果进行了分析和评价,对铁矿开采中钻爆作业参数的计算技术进行了分析。富铁矿破碎工艺方案设计及可行性评价。在本研究中,首次开发了一种资源节约型的在开发低强度、低稳定性的富铁矿床过程中形成三角形补偿室并在其上锤击破碎板主料的工艺方案,根据破碎板操作条件的不同,实际效率可提高7.8-18%。建立了补偿室倾斜露头的倾斜角与最小阻力线的关系。给定应力应变状态、破碎能量强度系数、破碎的具体代价以及破碎盘与崩塌的宿主岩有一个和两个接触时,破碎盘与矿床走向上垂侧岩石之间距离的效率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Development of an Efficient Process Scheme for Breaking High-Grade Iron Ores of Low Strength and Stability During Sublevel Caving
Introduction. The main part of rich iron ores (73%) is mined in the Kryvyi Rih iron ore basin, most of which(160.5 million tons) are characterized by a low strength and stability.Problem Statement. One of the most important operations of slope excavation, which significantly affects the productivity of delivery vehicles and a crushing and processing complex, the quality and completeness of extraction of rich iron ores of a low strength and stability, is drilling and blasting operations to form a compensationspace with maximum, in terms of stability, dimensions and to hammer the main stock of the panel into it.Purpose. The purpose is to develop an efficient process scheme for breaking off reserves of rich iron ores of a lowstrength and stability, given the stress-strain state, efficient length of wells, and the quality of ore mass crushing.Material and Methods. The structural and functional analysis of the systems for the development of sublevel caving, the numerical calculations with the analysis and assessment of the parameters of outcrops of compensation chambers, the analysis and assessment of practical experience and scientific achievements in the field of increasing the efficiency of the ore breakage process, the analysis of techniques for the calculation of the parameters of drilling and blasting operations in the extraction of iron ores, the design of process schemes for breaking rich iron ores and their feasibility assessment.Results. For the first time, in this study, there has been developed a resource-saving version of the process schemefor the formation of a triangular-shaped compensation chamber and the hammering of the main stock of a breakage panel on it in the course of developing rich iron ore deposits of a low strength and stability, which allowspractically raising the efficiency by 7.8—18%, depending on the conditions of the breakage panel operation.Conclusions. The author has established the dependences of the angle of inclination of the inclined outcrop of thecompensation chamber and the line of least resistance. given the stress-strain state, the breakage energy intensity coefficient, the specific costs of breakage, and the efficiency on the distance of the breakage panel to the rocks of the hanging side across the strike of the ore deposit with one and two contacts of the breakage panel with collapsed host rocks.
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来源期刊
Science and innovation
Science and innovation MULTIDISCIPLINARY SCIENCES-
CiteScore
1.10
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发文量
55
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