Pub Date : 2023-07-05DOI: 10.1007/s13563-023-00383-1
Malala N. Ojiambo, T. Adachi
{"title":"Selected critical metals for a low-carbon future","authors":"Malala N. Ojiambo, T. Adachi","doi":"10.1007/s13563-023-00383-1","DOIUrl":"https://doi.org/10.1007/s13563-023-00383-1","url":null,"abstract":"","PeriodicalId":44877,"journal":{"name":"Mineral Economics","volume":"41 1","pages":"519 - 534"},"PeriodicalIF":2.5,"publicationDate":"2023-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88028453","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 : 2023-06-29DOI: 10.33019/mineral.v8i1.4094
Fitra Adreansyah, F. Franto, E.P.S.B. Taman Tono
PT ABI is a private company engaged in the granite mining business using the open pit method. The problem encountered is that there is a slope of the mine road that does not comply with the standards set by the company, namely ≤ 8%, the slope of the mine road, which is not suitable, makes the truck to produce large rimpull, which affects the overall distribution time. This study aims to evaluate and optimize the dump truck cycle time obtained. This research begins by calculating the actual travel time on 2 dump trucks in 40 trips, conveyance A gets 493.72 seconds and conveyance B is 495.75 seconds, the actual travel time on the haul road segment exceeds ≥ 8%, i.e. in the B-C segment which has a grade of 8.86% with an average travel time of 20.38 seconds and in the C-D segment which has a grade of 10.51% with an average travel time of 37.91 seconds. Obtained circulation time decreased by 5 seconds from 494.73 seconds to 489.69 seconds with a percentage increase of 1.04% after optimization, meaning that the conveyance can transport 89 tons more of material.
{"title":"Evaluasi Kemiringan Jalan Tambang Terhadap Cycle Time Alat Angkut Pada Dump Truck Hino FG 235 JJ Tambang Batu Granit Di PT Aditya Buana Inter Kabupaten Bangka","authors":"Fitra Adreansyah, F. Franto, E.P.S.B. Taman Tono","doi":"10.33019/mineral.v8i1.4094","DOIUrl":"https://doi.org/10.33019/mineral.v8i1.4094","url":null,"abstract":"PT ABI is a private company engaged in the granite mining business using the open pit method. The problem encountered is that there is a slope of the mine road that does not comply with the standards set by the company, namely ≤ 8%, the slope of the mine road, which is not suitable, makes the truck to produce large rimpull, which affects the overall distribution time. This study aims to evaluate and optimize the dump truck cycle time obtained. This research begins by calculating the actual travel time on 2 dump trucks in 40 trips, conveyance A gets 493.72 seconds and conveyance B is 495.75 seconds, the actual travel time on the haul road segment exceeds ≥ 8%, i.e. in the B-C segment which has a grade of 8.86% with an average travel time of 20.38 seconds and in the C-D segment which has a grade of 10.51% with an average travel time of 37.91 seconds. Obtained circulation time decreased by 5 seconds from 494.73 seconds to 489.69 seconds with a percentage increase of 1.04% after optimization, meaning that the conveyance can transport 89 tons more of material.","PeriodicalId":44877,"journal":{"name":"Mineral Economics","volume":"31 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85860224","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 : 2023-06-27DOI: 10.1007/s13563-023-00381-3
H. Gagarin, R. Eggert
{"title":"Measuring trade flows of sintered NdFeB magnets and Li-ion batteries: reported vs. embedded US imports","authors":"H. Gagarin, R. Eggert","doi":"10.1007/s13563-023-00381-3","DOIUrl":"https://doi.org/10.1007/s13563-023-00381-3","url":null,"abstract":"","PeriodicalId":44877,"journal":{"name":"Mineral Economics","volume":"20 1","pages":"667 - 696"},"PeriodicalIF":2.5,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83469640","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 : 2023-06-27DOI: 10.1007/s13563-023-00384-0
Roman Stiftner, L. Weber, H. Rechberger
{"title":"Methodology for a better estimation of the reserves and resources of minor metals exemplified by selenium in different copper deposit types","authors":"Roman Stiftner, L. Weber, H. Rechberger","doi":"10.1007/s13563-023-00384-0","DOIUrl":"https://doi.org/10.1007/s13563-023-00384-0","url":null,"abstract":"","PeriodicalId":44877,"journal":{"name":"Mineral Economics","volume":"1990 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82317081","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 : 2023-06-25DOI: 10.33019/mineral.v8i1.4089
R. Pebrianto, E. Harsiga, Marwan Asof, Muhammad Dimas Thabrani
The research was conducted at Pit Q, PT Berau Coal with the aim of determining the productivity parameters of bulldozer ripping, excavator productivity, and factors affecting ripping activities on sandstone. The results showed that the material in pit q was sandstone which had a ucs value of 6.26 Mpa and a seismic velocity of 1751.63 m/s so the crossripping method was used so that the material was dismantled smaller. Based on ripper productivity, the relationship between the depth of penetration of the shank ripper and the speed of the bulldozer is obtained, productivity of the excavator is smaller if the space used by the ripper increases, so that the size of the material produced will be larger and the digging time of the excavator will increase. The influence of ripper activities is the depth of penetration that affects the speed of the bulldozer, the use of ripping space affects the digging time performance of the excavator too. Factors of the performance of the ripper are trapped material, ripper tip wear, and operator skills.
{"title":"Analisis Sifat Mekanik Batuan Terhadap Kemampugaruan Bulldozer Dan Kemampugalian Excavator Untuk Mencapai Target Produksi Overburden PT Berau Coal","authors":"R. Pebrianto, E. Harsiga, Marwan Asof, Muhammad Dimas Thabrani","doi":"10.33019/mineral.v8i1.4089","DOIUrl":"https://doi.org/10.33019/mineral.v8i1.4089","url":null,"abstract":"The research was conducted at Pit Q, PT Berau Coal with the aim of determining the productivity parameters of bulldozer ripping, excavator productivity, and factors affecting ripping activities on sandstone. The results showed that the material in pit q was sandstone which had a ucs value of 6.26 Mpa and a seismic velocity of 1751.63 m/s so the crossripping method was used so that the material was dismantled smaller. Based on ripper productivity, the relationship between the depth of penetration of the shank ripper and the speed of the bulldozer is obtained, productivity of the excavator is smaller if the space used by the ripper increases, so that the size of the material produced will be larger and the digging time of the excavator will increase. The influence of ripper activities is the depth of penetration that affects the speed of the bulldozer, the use of ripping space affects the digging time performance of the excavator too. Factors of the performance of the ripper are trapped material, ripper tip wear, and operator skills.","PeriodicalId":44877,"journal":{"name":"Mineral Economics","volume":"1 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81887447","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 : 2023-06-20DOI: 10.1007/s13563-023-00385-z
F. Dhahri, Emad Alashkham, M. Sofe
{"title":"Opportunities and challenges for the Libyan geological resource’s development: an overview","authors":"F. Dhahri, Emad Alashkham, M. Sofe","doi":"10.1007/s13563-023-00385-z","DOIUrl":"https://doi.org/10.1007/s13563-023-00385-z","url":null,"abstract":"","PeriodicalId":44877,"journal":{"name":"Mineral Economics","volume":"8 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84183796","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 : 2023-06-20DOI: 10.1007/s13563-023-00380-4
Xiaojie Xu, Yun Zhang
{"title":"Contemporaneous causality among regional steel price indices of east, south, north, central south, northeast, southwest, and northwest China","authors":"Xiaojie Xu, Yun Zhang","doi":"10.1007/s13563-023-00380-4","DOIUrl":"https://doi.org/10.1007/s13563-023-00380-4","url":null,"abstract":"","PeriodicalId":44877,"journal":{"name":"Mineral Economics","volume":"34 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90037923","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 : 2023-06-12DOI: 10.1007/s13563-023-00382-2
Monirul Islam, K. Sohag
{"title":"Mineral import demand and wind energy deployment in the USA: Co-integration and counterfactual analysis approaches","authors":"Monirul Islam, K. Sohag","doi":"10.1007/s13563-023-00382-2","DOIUrl":"https://doi.org/10.1007/s13563-023-00382-2","url":null,"abstract":"","PeriodicalId":44877,"journal":{"name":"Mineral Economics","volume":"5 3 1","pages":"697 - 717"},"PeriodicalIF":2.5,"publicationDate":"2023-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81277844","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 : 2023-06-06DOI: 10.33019/mineral.v8i1.3921
Musodiq Musodiq, Tommy Trides, Shalaho Dina Devy, Revia Oktaviani, Albertus Juvensius Pontus
The uniaxial compressive strength test was carried out to determine the value of rock strength. This research was conducted on sandstones in the Pamaluan Formation. The tests carried out in this study were physical properties tests, compressive strength tests and grain size tests on sandstones with a total of 30 samples on the physical properties test, 10 samples on the mechanical test and 500 gram grain size test at each point, the purpose of which is to determine the effect of porosity on the compressive strength of rock. In testing the physical properties carried out, the lowest and highest porosity values were 17.27 and 22.91%. The results of the compressive strength test with the lowest and highest values were 3.05 and 7.63 MPa. The grain size test results at points 1 and 2 are the same, namely fine sandstones with a percentage of 45 and 44%. From the results of research that has been done the value of porosity and grain size is very influential on the compressive strength test.
{"title":"Analisis Uji Kuat Tekan Uniaksial Batupasir Pada Formasi Pamaluan, Kecamatan Longikis, Kabupaten Paser, Provinsi Kalimantan Timur","authors":"Musodiq Musodiq, Tommy Trides, Shalaho Dina Devy, Revia Oktaviani, Albertus Juvensius Pontus","doi":"10.33019/mineral.v8i1.3921","DOIUrl":"https://doi.org/10.33019/mineral.v8i1.3921","url":null,"abstract":"The uniaxial compressive strength test was carried out to determine the value of rock strength. This research was conducted on sandstones in the Pamaluan Formation. The tests carried out in this study were physical properties tests, compressive strength tests and grain size tests on sandstones with a total of 30 samples on the physical properties test, 10 samples on the mechanical test and 500 gram grain size test at each point, the purpose of which is to determine the effect of porosity on the compressive strength of rock. In testing the physical properties carried out, the lowest and highest porosity values were 17.27 and 22.91%. The results of the compressive strength test with the lowest and highest values were 3.05 and 7.63 MPa. The grain size test results at points 1 and 2 are the same, namely fine sandstones with a percentage of 45 and 44%. From the results of research that has been done the value of porosity and grain size is very influential on the compressive strength test.","PeriodicalId":44877,"journal":{"name":"Mineral Economics","volume":"28 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82626195","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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