Pub Date : 2023-09-20DOI: 10.1080/25726668.2023.2257479
Juncong Qu, Mehmet S. Kizil, Mohsen Yahyaei, Peter F. Knights
ABSTRACTDigital Twins (DT) have become popular in various industries to solve complex problems. A true DT allows for bidirectional real-time data flows between the physical and virtual worlds.The term DT was often overused, leading to confusion about its capabilities therefore this paper provides a review of the current state of DT and its applications in the minerals industry. Existing literature shows a slow adoption of DTs in the minerals industry, which is largely due to challenges associated with geological unpredictability, legacy system integration, cost, skill gaps, cybersecurity, and lack of standards.Combining immersive visualisation with real-time spatial computer graphics could improve the usability and acceptance of DTs in the minerals industry which has been used successfully in training while underexplored for operational scenarios. The study concludes by highlighting the need for further research to understand the effectiveness of such an approach in mineral operations.KEYWORDS: Digital twinsmining and mineral processingIndustry 4.0internet of thingsdigitalisationsystem integrationextended realitycorporate Metaverse Disclosure statementNo potential conflict of interest was reported by the authors.Additional informationFundingThis work was supported by University of Queensland.
{"title":"Digital twins in the minerals industry – a comprehensive review","authors":"Juncong Qu, Mehmet S. Kizil, Mohsen Yahyaei, Peter F. Knights","doi":"10.1080/25726668.2023.2257479","DOIUrl":"https://doi.org/10.1080/25726668.2023.2257479","url":null,"abstract":"ABSTRACTDigital Twins (DT) have become popular in various industries to solve complex problems. A true DT allows for bidirectional real-time data flows between the physical and virtual worlds.The term DT was often overused, leading to confusion about its capabilities therefore this paper provides a review of the current state of DT and its applications in the minerals industry. Existing literature shows a slow adoption of DTs in the minerals industry, which is largely due to challenges associated with geological unpredictability, legacy system integration, cost, skill gaps, cybersecurity, and lack of standards.Combining immersive visualisation with real-time spatial computer graphics could improve the usability and acceptance of DTs in the minerals industry which has been used successfully in training while underexplored for operational scenarios. The study concludes by highlighting the need for further research to understand the effectiveness of such an approach in mineral operations.KEYWORDS: Digital twinsmining and mineral processingIndustry 4.0internet of thingsdigitalisationsystem integrationextended realitycorporate Metaverse Disclosure statementNo potential conflict of interest was reported by the authors.Additional informationFundingThis work was supported by University of Queensland.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136313438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-03DOI: 10.1080/25726668.2023.2235155
P. Stothard
ABSTRACT Futuristic views of mine operations allude to the use of immersive virtual worlds that transport people into what is now called a Metaverse, a network of 3D virtual worlds that can be experienced by an unlimited number of people simultaneously. The concept and benefit of combining real and virtual worlds have been around for many decades and have evolved considerably in recent years. When these are presented as a digital twin with bidirectional data and collaboration capability, potential exists for a powerful communications tool for mining operations. Hence, it is time to discuss the Metaverse from a mining perspective and this paper asks, ‘What is the Metaverse and how does it relate to mining?’ This paper presents some case studies, concepts, a model and considers the benefits of a Mining Metaverse as a communications tool that enhances decision making via remote collaboration.
{"title":"Mining Metaverse – a future collaborative tool for best practice mining","authors":"P. Stothard","doi":"10.1080/25726668.2023.2235155","DOIUrl":"https://doi.org/10.1080/25726668.2023.2235155","url":null,"abstract":"ABSTRACT Futuristic views of mine operations allude to the use of immersive virtual worlds that transport people into what is now called a Metaverse, a network of 3D virtual worlds that can be experienced by an unlimited number of people simultaneously. The concept and benefit of combining real and virtual worlds have been around for many decades and have evolved considerably in recent years. When these are presented as a digital twin with bidirectional data and collaboration capability, potential exists for a powerful communications tool for mining operations. Hence, it is time to discuss the Metaverse from a mining perspective and this paper asks, ‘What is the Metaverse and how does it relate to mining?’ This paper presents some case studies, concepts, a model and considers the benefits of a Mining Metaverse as a communications tool that enhances decision making via remote collaboration.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72742078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-03DOI: 10.1080/25726668.2023.2233230
Matin Ghasempour Anaraki, A. M. Afrapoli
ABSTRACT Fleet management systems in open pit mines make two important semi-dynamic and dynamic decisions to maximize utilization of available equipment: the decision of allocation and the decision of dispatching the trucks to the shovels. In this paper, we propose a bi-objective mathematical model that incorporates the minimization of carbon emission into the allocation optimization model. We also consider different inputs that might impact upon truck allocation decisions such as the fleet size, truck velocity, truck age groups, etc. The presented mathematical model is examined using two different case studies from an iron mine and a copper mine containing a different number of shovels, dumps, and trucks. The results reveal that the developed model enhances the production performance while controlling emissions. It is indicated that the average truck velocity and, the age of trucks are among the critical factors, which can highly affect the amount of carbon emissions.
{"title":"Sustainable open pit fleet management system: integrating economic and environmental objectives into truck allocation","authors":"Matin Ghasempour Anaraki, A. M. Afrapoli","doi":"10.1080/25726668.2023.2233230","DOIUrl":"https://doi.org/10.1080/25726668.2023.2233230","url":null,"abstract":"ABSTRACT Fleet management systems in open pit mines make two important semi-dynamic and dynamic decisions to maximize utilization of available equipment: the decision of allocation and the decision of dispatching the trucks to the shovels. In this paper, we propose a bi-objective mathematical model that incorporates the minimization of carbon emission into the allocation optimization model. We also consider different inputs that might impact upon truck allocation decisions such as the fleet size, truck velocity, truck age groups, etc. The presented mathematical model is examined using two different case studies from an iron mine and a copper mine containing a different number of shovels, dumps, and trucks. The results reveal that the developed model enhances the production performance while controlling emissions. It is indicated that the average truck velocity and, the age of trucks are among the critical factors, which can highly affect the amount of carbon emissions.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91245431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-03DOI: 10.1080/25726668.2023.2235496
P. Ojala, J. Rämö, Juha Miettinen, M. Vilkko
ABSTRACT Controller Area Network (CAN-bus) is a default solution for digital control in machinery. The CAN-bus structure uses connector components to extend cabling and join subsystems. The connectors are IP-classified, so they tolerate humidity and particle ingress. Ingress protection also provides durability against other stress factors. Usually, connectors are exposed to multiple stress factors, but the stress levels are durable. In mining applications, however, stress levels can be high, and other factors become significant, so IP classification does not necessarily indicate sufficient durability. Tailored testing can be used to identify suitable components for a specific purpose. In this study, the actual stress factors of an underground mine drill were used in tailored tests. The results showed significant differences in reliability between connector models with the same IP code. The ranking of the components varied depending on the stress factors used. This highlights the importance of using actual operating conditions when evaluating reliability.
{"title":"Reliability evaluation of CAN-bus connectors with tailored testing","authors":"P. Ojala, J. Rämö, Juha Miettinen, M. Vilkko","doi":"10.1080/25726668.2023.2235496","DOIUrl":"https://doi.org/10.1080/25726668.2023.2235496","url":null,"abstract":"ABSTRACT Controller Area Network (CAN-bus) is a default solution for digital control in machinery. The CAN-bus structure uses connector components to extend cabling and join subsystems. The connectors are IP-classified, so they tolerate humidity and particle ingress. Ingress protection also provides durability against other stress factors. Usually, connectors are exposed to multiple stress factors, but the stress levels are durable. In mining applications, however, stress levels can be high, and other factors become significant, so IP classification does not necessarily indicate sufficient durability. Tailored testing can be used to identify suitable components for a specific purpose. In this study, the actual stress factors of an underground mine drill were used in tailored tests. The results showed significant differences in reliability between connector models with the same IP code. The ranking of the components varied depending on the stress factors used. This highlights the importance of using actual operating conditions when evaluating reliability.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87414849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-30DOI: 10.1080/25726668.2023.2228071
N. Azadi, Hossein Mirzaei-Nasirabad, Amin Mousavi
ABSTRACT Due to the large size of open-pit mines’ long-term production scheduling (OPMPS) problem in large-scale deposits, it is challenging to solve that problem as the mixed integer linear programming (MILP) model. This study used an approach of the genetic algorithm (GA) to tackle this challenge. So, in a small hypothetical deposit, based on the blocks in the ultimate pit limit and scenarios with 2–6 phases, net present values (NPV) and computational times obtained from the GA and MILP model were compared to evaluate the GA. Also, the GA was applied to a large-scale deposit to determine the efficiency of the GA in real deposits. The maximum NPV was obtained for the four-phase scenario in the hypothetical deposit and the six-phase scenario in the large-scale deposit. Although the GA’s NPV decreased slightly compared to the global optimum solution from the MILP model, the computational time was significantly reduced.
{"title":"A Genetic algorithm scheme for large scale open-pit mine production scheduling","authors":"N. Azadi, Hossein Mirzaei-Nasirabad, Amin Mousavi","doi":"10.1080/25726668.2023.2228071","DOIUrl":"https://doi.org/10.1080/25726668.2023.2228071","url":null,"abstract":"ABSTRACT Due to the large size of open-pit mines’ long-term production scheduling (OPMPS) problem in large-scale deposits, it is challenging to solve that problem as the mixed integer linear programming (MILP) model. This study used an approach of the genetic algorithm (GA) to tackle this challenge. So, in a small hypothetical deposit, based on the blocks in the ultimate pit limit and scenarios with 2–6 phases, net present values (NPV) and computational times obtained from the GA and MILP model were compared to evaluate the GA. Also, the GA was applied to a large-scale deposit to determine the efficiency of the GA in real deposits. The maximum NPV was obtained for the four-phase scenario in the hypothetical deposit and the six-phase scenario in the large-scale deposit. Although the GA’s NPV decreased slightly compared to the global optimum solution from the MILP model, the computational time was significantly reduced.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72527520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-14DOI: 10.1080/25726668.2023.2219128
J. Aubertin, M. Wimmer, Masoud Sedghi
ABSTRACT An experimental method is proposed to assess blasting requirements based on in-situ cratering behavior. The method relies on single hole blast (SHB) tests to derive burden-dependent relationships. A non-linear crater model of the form is calibrated from SHB test results to describe the cratering behavior. Parameters and represent characteristic blastability index parameters that depend on geomechanical and operational conditions. A series of experimental SHB tests were conducted at three hard rock mines. The craters were mapped to capture the breakout profile and calibrate the model. Results showed that coefficient presents an inverse linear correlation with burden , while exponent s is approximately constant for a considerable range of burden values. Experimental results are used to define burden dependent relationship for bench blast designs and blasthole placement in underground development rounds. A complementary analysis addresses the prevalence of multiple cratering mechanisms according to geology and burden dimension.
{"title":"Development of site specific blasting index parameters based on single hole blast test cratering","authors":"J. Aubertin, M. Wimmer, Masoud Sedghi","doi":"10.1080/25726668.2023.2219128","DOIUrl":"https://doi.org/10.1080/25726668.2023.2219128","url":null,"abstract":"ABSTRACT An experimental method is proposed to assess blasting requirements based on in-situ cratering behavior. The method relies on single hole blast (SHB) tests to derive burden-dependent relationships. A non-linear crater model of the form is calibrated from SHB test results to describe the cratering behavior. Parameters and represent characteristic blastability index parameters that depend on geomechanical and operational conditions. A series of experimental SHB tests were conducted at three hard rock mines. The craters were mapped to capture the breakout profile and calibrate the model. Results showed that coefficient presents an inverse linear correlation with burden , while exponent s is approximately constant for a considerable range of burden values. Experimental results are used to define burden dependent relationship for bench blast designs and blasthole placement in underground development rounds. A complementary analysis addresses the prevalence of multiple cratering mechanisms according to geology and burden dimension.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89423853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-08DOI: 10.1080/25726668.2023.2218170
Nasib Al Habib, E. Ben-Awuah, H. Askari-Nasab
ABSTRACT In-Pit Crushing and Conveying (IPCC) has gained momentum in recent years to replace trucks partially or fully in large open pit mines because of the shovel-truck system's increasing fuel and labour costs and conveyor systems' low operating costs and less greenhouse gas emissions. This article reviews the most recent literature since 2010 on short-term planning, based on different formulation and solution approaches, and IPCC, based on primary objectives such as optimum crusher location, economic/environmental comparison etc., to find the research gaps and future research opportunities in short-term planning with IPCC. The review reveals that hardly any short-term planning model can generate mine extraction sequences with IPCC integration. Therefore, a short-term planning methodology considering the IPCC system would be a pioneering step in the mine planning literature. Hence, the authors propose a theoretical short-term planning framework with IPCC as a future research direction.
{"title":"Review of recent developments in short-term mine planning and IPCC with a research agenda","authors":"Nasib Al Habib, E. Ben-Awuah, H. Askari-Nasab","doi":"10.1080/25726668.2023.2218170","DOIUrl":"https://doi.org/10.1080/25726668.2023.2218170","url":null,"abstract":"ABSTRACT In-Pit Crushing and Conveying (IPCC) has gained momentum in recent years to replace trucks partially or fully in large open pit mines because of the shovel-truck system's increasing fuel and labour costs and conveyor systems' low operating costs and less greenhouse gas emissions. This article reviews the most recent literature since 2010 on short-term planning, based on different formulation and solution approaches, and IPCC, based on primary objectives such as optimum crusher location, economic/environmental comparison etc., to find the research gaps and future research opportunities in short-term planning with IPCC. The review reveals that hardly any short-term planning model can generate mine extraction sequences with IPCC integration. Therefore, a short-term planning methodology considering the IPCC system would be a pioneering step in the mine planning literature. Hence, the authors propose a theoretical short-term planning framework with IPCC as a future research direction.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79368217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-05DOI: 10.1080/25726668.2023.2217669
Muhammad Tariq, A. Gustafson, H. Schunnesson
ABSTRACT Mining is a high-risk industry, so efficiency and safety are key priorities. Technological advancements, such as digitisation, digitalisation, and automation have made mines safer. These developments have also highlighted the need for operators with updated skills and improved education programs. This study analysed the training of semi-autonomous and manual Load Haul Dump (LHD) operators’ at LKAB’s Kiirunavaara mine, focusing on operators’ training, perspective and integration of more recent tool such as simulator training. The survey questionnaire was sent to all 120 LHD operators. 86 answers were received, giving response rate of 70%. Results showed that operators generally were satisfied with how the training was structured, organised, and delivered. However, they wanted to add more topics, including practical loading, spending time with departments of other sub-processes, etc. In addition, 36% of the operators, including 20% of those operating semi-autonomous LHDs, and 80% of those operating manual LHDs, found simulator training difficult.
{"title":"Training of load haul dump (LHD) machine operators: a case study at LKAB’s Kiirunavaara mine","authors":"Muhammad Tariq, A. Gustafson, H. Schunnesson","doi":"10.1080/25726668.2023.2217669","DOIUrl":"https://doi.org/10.1080/25726668.2023.2217669","url":null,"abstract":"ABSTRACT Mining is a high-risk industry, so efficiency and safety are key priorities. Technological advancements, such as digitisation, digitalisation, and automation have made mines safer. These developments have also highlighted the need for operators with updated skills and improved education programs. This study analysed the training of semi-autonomous and manual Load Haul Dump (LHD) operators’ at LKAB’s Kiirunavaara mine, focusing on operators’ training, perspective and integration of more recent tool such as simulator training. The survey questionnaire was sent to all 120 LHD operators. 86 answers were received, giving response rate of 70%. Results showed that operators generally were satisfied with how the training was structured, organised, and delivered. However, they wanted to add more topics, including practical loading, spending time with departments of other sub-processes, etc. In addition, 36% of the operators, including 20% of those operating semi-autonomous LHDs, and 80% of those operating manual LHDs, found simulator training difficult.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84678191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-27DOI: 10.1080/25726668.2023.2215560
S. Manzoor, A. Gustafson, H. Schunnesson
ABSTRACT Oversize rock fragments are highly undesired in a sublevel caving (SLC) operation as they affect the production cycle, equipment, and infrastructure. In this study, a field test was carried out in Malmberget mine to analyse the impact of oversize fragments on the production cycle and the costs of different procedures for handling such fragments. The tests involved monitoring of dumping oversize fragments in two orepasses, one with a grizzly and the other one without a grizzly, using cameras. The cycle times of load-haul-dump (LHD) machines were determined for both orepasses. The results indicate that the grizzly increased the availability and productivity of the orepass despite increasing the cycle time of the LHD machines. Moreover, installation of a boulder breaker system along with the grizzly can further increase the productivity and the cost of such a system will be paid off in a shorter time in terms of enhanced productivity.
{"title":"Dumping oversize rock fragments in orepasses: the impact on the production cycle of a sublevel caving operation","authors":"S. Manzoor, A. Gustafson, H. Schunnesson","doi":"10.1080/25726668.2023.2215560","DOIUrl":"https://doi.org/10.1080/25726668.2023.2215560","url":null,"abstract":"ABSTRACT Oversize rock fragments are highly undesired in a sublevel caving (SLC) operation as they affect the production cycle, equipment, and infrastructure. In this study, a field test was carried out in Malmberget mine to analyse the impact of oversize fragments on the production cycle and the costs of different procedures for handling such fragments. The tests involved monitoring of dumping oversize fragments in two orepasses, one with a grizzly and the other one without a grizzly, using cameras. The cycle times of load-haul-dump (LHD) machines were determined for both orepasses. The results indicate that the grizzly increased the availability and productivity of the orepass despite increasing the cycle time of the LHD machines. Moreover, installation of a boulder breaker system along with the grizzly can further increase the productivity and the cost of such a system will be paid off in a shorter time in terms of enhanced productivity.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74239613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-03DOI: 10.1080/25726668.2023.2205080
B. McFadyen, M. Grenon, K. Woodward, Y. Potvin
ABSTRACT This paper presents the first steps towards a new stope design approach, where stope overbreak (OB; rock mined outside of the design) and underbreak (UB; planned rock left behind) is assessed using statistical multivariate analysis (principal component analysis [PCA] and partial least square [PLS]) and georeferenced data measured at an approximately cubic metre resolution (octrees). Results showed that OB is observed in areas of the stope where there is a large blasting energy proxy, large undercut and towards the middle of the face. UB tends to be observed near the border of the faces and where there is large blasting standoff and toeing of the rings. The resolution of the data and the use of multivariate analysis have enabled the depiction of an accurate interpretation of the variation of stope performance along the design surface, going beyond the simple per face analysis.
{"title":"Assessing stope performance using georeferenced octrees and multivariate analysis","authors":"B. McFadyen, M. Grenon, K. Woodward, Y. Potvin","doi":"10.1080/25726668.2023.2205080","DOIUrl":"https://doi.org/10.1080/25726668.2023.2205080","url":null,"abstract":"ABSTRACT This paper presents the first steps towards a new stope design approach, where stope overbreak (OB; rock mined outside of the design) and underbreak (UB; planned rock left behind) is assessed using statistical multivariate analysis (principal component analysis [PCA] and partial least square [PLS]) and georeferenced data measured at an approximately cubic metre resolution (octrees). Results showed that OB is observed in areas of the stope where there is a large blasting energy proxy, large undercut and towards the middle of the face. UB tends to be observed near the border of the faces and where there is large blasting standoff and toeing of the rings. The resolution of the data and the use of multivariate analysis have enabled the depiction of an accurate interpretation of the variation of stope performance along the design surface, going beyond the simple per face analysis.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76733530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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