Analysis of the economic feasibility of a mining project due to the presence of natural underground cavities

Q3 Earth and Planetary Sciences

Rem-Revista Escola De Minas Pub Date : 2015-09-01 DOI:10.1590/0370-44672014680094

Iure Borges de Moura Aquino, H. Lima

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引用次数: 3

Abstract

The legislation for the protection and conservation of caves is recent in Brazil. In 2008, the Decree 6.640 was enacted and in 2009, the Normative Instruction No 2 by the Brazilian Environment Ministry (MMA, Portuguese acronyms) was published. Mining operations cause a significant impact on the caves when they are present in or next to the mineral body. The impacts include the suppression of cavities and impacts on physical and bio-speleological stability of the caves. On the other hand, the actual legislation causes a significant impact on the mineable reserves when cavities are present. This article aims to assess the impact of the natural cavities on the feasibility of a mining project, based on the federal legislation, as well as to propose alternatives to combine mining activity with cave protection. For this research, three scenarios of open pit for a hypothetical ore body were considered for the assessments. This paper presents the results achieved for the three and comments on the necessity of researches to conciliate the conservation of the natural underground cavities with the mining activities.

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对存在天然地下空腔的采矿项目进行经济可行性分析

保护和保存洞穴的立法是最近在巴西颁布的。2008年颁布了第6.640号法令，2009年，巴西环境部发布了第2号规范指令(MMA，葡萄牙语首字母缩写)。当洞穴在矿体内或靠近矿体时，采矿作业对洞穴造成重大影响。这些影响包括对洞穴的抑制和对洞穴的物理和生物稳定性的影响。另一方面，当存在空腔时，实际立法会对可开采储量产生重大影响。本文旨在根据联邦立法，评估天然洞穴对采矿项目可行性的影响，并提出将采矿活动与洞穴保护相结合的替代方案。本研究考虑了假设矿体露天开采的三种情况进行评价。本文介绍了三者的研究成果，并对协调地下天然空腔保护与采矿活动的必要性进行了评述。

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

Rem-Revista Escola De Minas 工程技术-工程：土木

自引率

0.00%

发文量

审稿时长

6-12 weeks

期刊介绍： REM – International Engineering Journal (antigua REM – Revista Escola de Minas) es la primera revista técnica de Sudamérica. Fue fundada en enero de 1936 por los estudiantes de la Escuela de Minas de Ouro Preto y desde entonces se ha especializado en la publicación de artículos en las áreas de la Ingeniería Civil, Geología, Metalurgia y Materiales y, Minería y Mecánica y Energía. Su objetivo es servir como un medio de publicación para los trabajos técnicos y científicos originales de investigadores nacionales y extranjeros en esas áreas. Contribuciones originales (artículos y cartas) son aceptadas. Artículos de revisión dependen de la invitación y/o análisis de los Editores. El envío de artículos para su publicación implica que el trabajo no ha sido publicado previamente, que no está siendo presentado para su publicación en otra revista y no se publicará en otro lugar, en la misma forma, sin el permiso, por escrito, de los Editores/Autores.