Renato Petter - Academia.edu (original) (raw)
Papers by Renato Petter
REM - International Engineering Journal
This study presents a review of the methodology for choosing the type of access and exploitation ... more This study presents a review of the methodology for choosing the type of access and exploitation methodology for underground mines, being the choice of the type of access, one of the initial stages of the conceptual projects. To this end, in addition to literature verification, technical feasibility reports of recent projects were analyzed, made available by mining companies listed on the Toronto Stock Exchange. In this report, data were extracted referring to technical and productive characteristics of the projects, thus allowing comparison with classic methodologies for the choice of types of access and the compilation of a new flowchart, adhered to the current mining industry. The data from the projects were separated considering the mining methods with the largest number of samples, as well as the productive and mineral deposit characteristics. As a result, a chart is presented for the choice of access and mining method as a function of productive characteristics, ore body geometry and rock mass quality. Updating the limits considered for depth and daily production corresponded to a significant improvement in the response of the suggested access type and made it compatible with that presented in the feasibility projects.
REM - International Engineering Journal
This study presents a review of the methodology for choosing the type of access and exploitation ... more This study presents a review of the methodology for choosing the type of access and exploitation methodology for underground mines, being the choice of the type of access, one of the initial stages of the conceptual projects. To this end, in addition to literature verification, technical feasibility reports of recent projects were analyzed, made available by mining companies listed on the Toronto Stock Exchange. In this report, data were extracted referring to technical and productive characteristics of the projects, thus allowing comparison with classic methodologies for the choice of types of access and the compilation of a new flowchart, adhered to the current mining industry. The data from the projects were separated considering the mining methods with the largest number of samples, as well as the productive and mineral deposit characteristics. As a result, a chart is presented for the choice of access and mining method as a function of productive characteristics, ore body geometry and rock mass quality. Updating the limits considered for depth and daily production corresponded to a significant improvement in the response of the suggested access type and made it compatible with that presented in the feasibility projects.
SSRN Electronic Journal, 2017
By analogy with Social Licence to Operate, Social Licence to Finance refers to the pressure put b... more By analogy with Social Licence to Operate, Social Licence to Finance refers to the pressure put by society as a whole on the finance industry not to fund projects that are considered as socially undesirable/irresponsible. Because of coal’s contribution to greenhouse gas emissions and hence to global warming, many environmentally active NGOs want to put an end to coal-fired power plants and are putting pressure on the finance industry to stop funding coal-mining. There have been three main impacts: firstly some banks involved in project finance (non-recourse funding of large projects) now refuse coal projects and other restrict funding to them; secondly, socially responsible pension funds no longer invest in coal companies (e.g. the Norwegian Sovereign Fund recently divested investments in thermal coal companies worth $8 billion), and finally the Financial Stability Board now requires international banks and insurance companies to evaluate the potential impact of climate change measures on their business. Going further, the Securities and Exchange Commission (SEC) and the New York Attorney General are putting pressure on mining and oil companies listed on the NYSE to provide much more explicit warnings to investors.
The number of major tailings dam failures has doubled over the past 20 years, culminating in the ... more The number of major tailings dam failures has doubled over the past 20 years, culminating in the tragic accident at Brumadinho in Brazil where about 300 people lost their lives. In this context, there is a growing demand from mining companies, institutional investors and policymakers alike for updated mining project assessment tools taking account of such risks. As part of this research, this paper develops a real option framework for evaluating mining projects involving tailings dams and their associated risk. Two options are considered beyond standard business-as-usual safety measures: reinforced dam maintenance, and retrofitting a treatment process that reduces the volume of unconsolidated tailings. A closed-form expression was obtained for the expected value of the business-as-usual case; semi-analytic formulas were obtained for the two options for evaluation by dynamic programming with quantization of the price factor. When applied to an iron ore deposit with characteristics si...
REM - International Engineering Journal
This study presents a review of the methodology for choosing the type of access and exploitation ... more This study presents a review of the methodology for choosing the type of access and exploitation methodology for underground mines, being the choice of the type of access, one of the initial stages of the conceptual projects. To this end, in addition to literature verification, technical feasibility reports of recent projects were analyzed, made available by mining companies listed on the Toronto Stock Exchange. In this report, data were extracted referring to technical and productive characteristics of the projects, thus allowing comparison with classic methodologies for the choice of types of access and the compilation of a new flowchart, adhered to the current mining industry. The data from the projects were separated considering the mining methods with the largest number of samples, as well as the productive and mineral deposit characteristics. As a result, a chart is presented for the choice of access and mining method as a function of productive characteristics, ore body geometry and rock mass quality. Updating the limits considered for depth and daily production corresponded to a significant improvement in the response of the suggested access type and made it compatible with that presented in the feasibility projects.
REM - International Engineering Journal
This study presents a review of the methodology for choosing the type of access and exploitation ... more This study presents a review of the methodology for choosing the type of access and exploitation methodology for underground mines, being the choice of the type of access, one of the initial stages of the conceptual projects. To this end, in addition to literature verification, technical feasibility reports of recent projects were analyzed, made available by mining companies listed on the Toronto Stock Exchange. In this report, data were extracted referring to technical and productive characteristics of the projects, thus allowing comparison with classic methodologies for the choice of types of access and the compilation of a new flowchart, adhered to the current mining industry. The data from the projects were separated considering the mining methods with the largest number of samples, as well as the productive and mineral deposit characteristics. As a result, a chart is presented for the choice of access and mining method as a function of productive characteristics, ore body geometry and rock mass quality. Updating the limits considered for depth and daily production corresponded to a significant improvement in the response of the suggested access type and made it compatible with that presented in the feasibility projects.
SSRN Electronic Journal, 2017
By analogy with Social Licence to Operate, Social Licence to Finance refers to the pressure put b... more By analogy with Social Licence to Operate, Social Licence to Finance refers to the pressure put by society as a whole on the finance industry not to fund projects that are considered as socially undesirable/irresponsible. Because of coal’s contribution to greenhouse gas emissions and hence to global warming, many environmentally active NGOs want to put an end to coal-fired power plants and are putting pressure on the finance industry to stop funding coal-mining. There have been three main impacts: firstly some banks involved in project finance (non-recourse funding of large projects) now refuse coal projects and other restrict funding to them; secondly, socially responsible pension funds no longer invest in coal companies (e.g. the Norwegian Sovereign Fund recently divested investments in thermal coal companies worth $8 billion), and finally the Financial Stability Board now requires international banks and insurance companies to evaluate the potential impact of climate change measures on their business. Going further, the Securities and Exchange Commission (SEC) and the New York Attorney General are putting pressure on mining and oil companies listed on the NYSE to provide much more explicit warnings to investors.
The number of major tailings dam failures has doubled over the past 20 years, culminating in the ... more The number of major tailings dam failures has doubled over the past 20 years, culminating in the tragic accident at Brumadinho in Brazil where about 300 people lost their lives. In this context, there is a growing demand from mining companies, institutional investors and policymakers alike for updated mining project assessment tools taking account of such risks. As part of this research, this paper develops a real option framework for evaluating mining projects involving tailings dams and their associated risk. Two options are considered beyond standard business-as-usual safety measures: reinforced dam maintenance, and retrofitting a treatment process that reduces the volume of unconsolidated tailings. A closed-form expression was obtained for the expected value of the business-as-usual case; semi-analytic formulas were obtained for the two options for evaluation by dynamic programming with quantization of the price factor. When applied to an iron ore deposit with characteristics si...