Djamaluddin Djamaluddin, Mulhadramy Mulhadramy, N. Jafar
{"title":"Comparative Analysis of Mined Reserve Tonnage on \"M\" Hill Between Mine Plan and Mining Realization","authors":"Djamaluddin Djamaluddin, Mulhadramy Mulhadramy, N. Jafar","doi":"10.58227/jge.v1i1.6","DOIUrl":"https://doi.org/10.58227/jge.v1i1.6","url":null,"abstract":"In mining activities, there is often a discrepancy between the plan and actual conditions in the field; if not identified early, this discrepancy will undoubtedly have the potential to cause losses if it continues to repeat itself. This study aimed to determine the factors driving the difference between the mine plan and mining realization. This research uses Pit design data, mine progress measurement data, material movement data, and two mine plan data, namely the backup plan model resulting from detailed exploration and the backup plan model data from the input drill results. From the results of the mine plan research, the closest to realization is the plan using input drill data with an average material movement difference of 10% and the difference in mined ore reserves an average of 12%. In comparison, detailed exploration data with an intermediate material movement difference of 12% to 42% and the contrast in mined ore reserves is 52% on average. The presence of overcuts influences this and the use of different densities.","PeriodicalId":446458,"journal":{"name":"Journal of Geology and Exploration","volume":"220 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126506925","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}
{"title":"Classification of Ni Levels for Determination Cut-Off Grade in Region X","authors":"N. Jafar, Hendra Wahid, S. Widodo","doi":"10.58227/jge.v1i1.3","DOIUrl":"https://doi.org/10.58227/jge.v1i1.3","url":null,"abstract":"The need for ore with levels above 1.8% presents the author's initiative to conduct research to produce ore products with the required levels. The aim is to find out the lowest grade of ore that can be mined and used as a cut-off grade in area x. The research method used is the blending method. Some of the data needed include the drill point coordinates, the borehole's depth, the borehole, the slope of the borehole, lithology, and the value of Ni content. The distribution of nickel in the x region is dominated by ore which has a grade of 1 to 2% with a total volume of 140,100 Bcm, and there is a small amount of nickel that has a rate above 2% with an importance of 15,650 Bcm. The mining sequence has been divided into three to three stages, where the tonnage obtained from each location is 8,9937 tons, 442361 tons, and 100,554 tons. The simulation of blending steps was carried out starting from the classification of nickel with the highest grade, namely nickel with the lowest rate of 1.8% with an average rise of 2.07%, to the last stage, which produces a middle grade of 1.9%, namely in the classification of nickel with rates above 1.6 %. From the results of the blending simulation that has been carried out, it can be concluded that the lowest grade that can be used as a cut-off grade in area x is ore with a Ni content of 1.6%.","PeriodicalId":446458,"journal":{"name":"Journal of Geology and Exploration","volume":"41 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129714849","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}
{"title":"Calculation of PIT 4 Coal Reserves with Cross-Cross Method","authors":"Shabiruddin Shabiruddin, A. Anshariah, H. Bakri","doi":"10.58227/jge.v1i1.4","DOIUrl":"https://doi.org/10.58227/jge.v1i1.4","url":null,"abstract":"Calculating coal reserves using the vertical section method can describe the condition of deposits and overburden in each section. This study aimed to determine the direction of coal distribution, the volume of overburden, and the volume of coal using the cross-section method and to obtain the stripping ratio (SR). In this research activity, data is needed in the form of documentation on pit 4, cross-section, drill logs, and coordinates of drill points. After all the data has been collected, it is continued by making a cross-section in the form of a horizontal (cross-section) using Auto Cad software. The final stage of the interpretation of the two data results is calculating the number of coal reserves, the amount of overburden (OB), and the stripping ratio value by the concept of continuity that has been carried out from the existing data.","PeriodicalId":446458,"journal":{"name":"Journal of Geology and Exploration","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131575214","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}
Jamal Rauf Husain, Normansyah Normansyah, H. Bakri
{"title":"Structure Control of Iron Ore Education on Sebuku Island","authors":"Jamal Rauf Husain, Normansyah Normansyah, H. Bakri","doi":"10.58227/jge.v1i1.2","DOIUrl":"https://doi.org/10.58227/jge.v1i1.2","url":null,"abstract":"Sebuku is occupied by serpentinized ultramafic (peridotite) rocks, gabbro, and chert which are ophiolite series formed in the oceanic crust, in the middle occupied by tuff and claystones. The purpose of this study was to determine the distribution pattern of iron ore deposits. The research area illustrates that the distribution of Fe elements with high levels of >48% is concentrated in the northeast-southwest part, while Fe elements with levels of <48% are concentrated in the southwest-northwest part of the west. Based on the topographic classification of the research area. The pattern of mineralization follows the structural pattern that occurs, where the lateralization of the source rock is intensive in the crushing zone around the structure that forms the main structure and minor structure. This destruction zone serves as an effective water infiltration medium to accelerate the washing process which forms supergene enrichment zones. The pattern of distribution of mineralization is relatively Northeast-Southwest which in some places is characterized by the straightness of the ridge or morphology with more contrasting and prominent zones on the lidar mosaic map.","PeriodicalId":446458,"journal":{"name":"Journal of Geology and Exploration","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115810609","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}
Yunita Nurjayanty, Djamaluddin Djamaluddin, Agus Ardianto Budiman
{"title":"Block Model of Laterite Nickel Reserve in the Sorowako Village Research Area, South Sulawesi Province","authors":"Yunita Nurjayanty, Djamaluddin Djamaluddin, Agus Ardianto Budiman","doi":"10.58227/jge.v1i1.5","DOIUrl":"https://doi.org/10.58227/jge.v1i1.5","url":null,"abstract":"The manufacture of laterite nickel deposit model blocks is one of the stages after exploration activities are carried out in an area that shows potential resources that are feasible to be exploited. The purpose of this study was to determine the tonnage value of an estimated resource of saprolite and limonite ore deposits in the drilling area. The research method is the implementation of fieldwork, which includes a survey of the area to be drilled, tools and materials used in drilling production, and determining the stages in making model blocks. The data used in this study are data from analysis of nickel content, data on the total depth of drill points, lithology data of laterite nickel profiles, and data on coordinates and elevation of drill points. In research conducted in the concession area of the research area with a number of drill points of as many as 275 points and a drill spacing of 25 meters and 50 meters, the number of resources that have been calculated in the form of a 3D block model and a cross-sectional vertical correlation where in the limonite layer the volume value is obtained. of 757,031 m3 with an average Ni content: 0.84%, while the saprolite layer obtained a volume value of 210,781 m3 with an average Ni content: 1.80%. The conclusion obtained is that the tonnage value for the limonite layer is 1,211,250 tons, and for the saprolite layer the tonnage value is 400,484 tons.","PeriodicalId":446458,"journal":{"name":"Journal of Geology and Exploration","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129873249","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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