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Gas-lift wells optimization at the oil field "K" K油田气举井优化设计
Podzemni Radovi Pub Date : 2022-01-01 DOI: 10.5937/podrad2241031d
D. Danilovic, Marija Z. Ilić, M. Crnogorac, L. Tomić
{"title":"Gas-lift wells optimization at the oil field \"K\"","authors":"D. Danilovic, Marija Z. Ilić, M. Crnogorac, L. Tomić","doi":"10.5937/podrad2241031d","DOIUrl":"https://doi.org/10.5937/podrad2241031d","url":null,"abstract":"Optimization the operating parameters of a group of gas-lift wells in an oil field is a complex procedure. It is important to match parameters such as gas compression pressure, gas injection pressure, separation pressure at the gathering station, diameters of distribution pipelines, injection gas quantities as well as all individual operating parameters of the gas-lift wells. In this paper, a model for determining the optimum gas injection rate was created. Also, it is described the procedure for gas-lift well optimization at the oil filed \"K\" and its results. For all five wells, the optimum amount of injected gas and required number of gas-lift valves were determined.","PeriodicalId":31689,"journal":{"name":"Podzemni Radovi","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71025088","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}
引用次数: 0
Transformations of mechanochemical activated Na2CO3 机械化学活化Na2CO3的转化
Podzemni Radovi Pub Date : 2022-01-01 DOI: 10.5937/podrad2241015q
Nataša Đorđević, Slavica Mihajlović, Katarina Pantovic-Spajic, Jasmina Lozanović-Šajić, M. Grubišić
{"title":"Transformations of mechanochemical activated Na2CO3","authors":"Nataša Đorđević, Slavica Mihajlović, Katarina Pantovic-Spajic, Jasmina Lozanović-Šajić, M. Grubišić","doi":"10.5937/podrad2241015q","DOIUrl":"https://doi.org/10.5937/podrad2241015q","url":null,"abstract":"During mechanical activation, energy of treated material is increase to a higher level. This can lead to chemical transformation of the activated material. This is the point where we can talk about mechanochemical transformations that have occurred as a result of mechanical activation. The subject of this paper is to monitor mass changes of material after different degrees of activation. One of the substances which is often used in the processes of mechanochemical synthesis is sodium carbonate. The mass changes occurring during the treatment were detected and measured by various methods, depending on the processing environment. The mass increase was attributed to chemisorption of moisture and carbon-dioxide present in air, as a consequence of the sodium carbonate activation. The methods we used were calcimetric chemical analysis. According to obtained results, it was found that activated sodium carbonate is mass-transformed into sodium bicarbonate, whereby these changes are functionally dependent on activation time and the processing atmosphere.","PeriodicalId":31689,"journal":{"name":"Podzemni Radovi","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71025033","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}
引用次数: 0
Characterization of ground oscillations induced by underground mining 地下开采诱发地面振动的表征
Podzemni Radovi Pub Date : 2022-01-01 DOI: 10.5937/podrad2240001k
S. Kostić, N. Vasovic
{"title":"Characterization of ground oscillations induced by underground mining","authors":"S. Kostić, N. Vasovic","doi":"10.5937/podrad2240001k","DOIUrl":"https://doi.org/10.5937/podrad2240001k","url":null,"abstract":"We examine ground acceleration during M1.5 and M2.0 seismic events induced by underground mining at Upper Silesian coal basin and Legnica Glogow copper mine, respectively, using methods of nonlinear time series analysis, in order to confirm its stochastic nature. Recorded time series are firstly embedded into the adequate phase space using the mutual information and box-assisted methods. After this, we performed stationarity test, by which we confirmed that the examined ground acceleration belongs to a group of stationary processes. Surrogate data testing is applied then, which resulted in following: (1) horizontal ground acceleration at Legnica Glogow copper mine represents stationary linear stochastic processes with Gaussian inputs, (2) ground acceleration at Upper Silesian coal basin originates from a stationary Gaussian linear process that has been distorted by a monotonic, instantaneous, time-independent non-linear function, (3) vertical ground acceleration at Legnica Glogow copper mine could not be ascribed to any of the examined processes, probably due to high level of instrumental or background noise. Low values of determinism coefficient (c≤0.7), negative values of maximum Lyapunov exponent and quick saturation of neighboring points distance with the increase of embedding dimension indicate the absence of determinism in the observed ground acceleration time series.","PeriodicalId":31689,"journal":{"name":"Podzemni Radovi","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71025195","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}
引用次数: 0
Application of UBC methodology for underground mining method selection UBC方法在地下采矿方法选择中的应用
Podzemni Radovi Pub Date : 2022-01-01 DOI: 10.5937/podrad2240015m
Stojanče Mijalkovski, Z. Despodov, D. Mirakovski, V. Adjiski, Nikolinka Doneva
{"title":"Application of UBC methodology for underground mining method selection","authors":"Stojanče Mijalkovski, Z. Despodov, D. Mirakovski, V. Adjiski, Nikolinka Doneva","doi":"10.5937/podrad2240015m","DOIUrl":"https://doi.org/10.5937/podrad2240015m","url":null,"abstract":"The total operating costs of each mine largely depend on the method of mining. Therefore, the appropriate choice of the method of mining excavation is very important and great attention is paid to this issue. There are several procedures for the selection of the mining method, among which the most important and most commonly used numerical method is the UBC methodology for the selection of the mining method. According to this methodology, the choice of the method of mining excavation is based on the mining-geological parameters of the ore and adjacent rocks. In this paper, the UBC methodology for the selection of the mining excavation method for a specific case will be applied. According to this methodology, it was obtained that Cut and Fill method is best ranked for specific conditions and the most appropriate way of mining.","PeriodicalId":31689,"journal":{"name":"Podzemni Radovi","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71025263","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}
引用次数: 2
DTA/TG analysis of mechanochemicaly activated sodium carbonate 机械化学活化碳酸钠的DTA/TG分析
Podzemni Radovi Pub Date : 2021-06-30 DOI: 10.5937/podrad2138047q
Nataša Đorđević, Slavica Mihajlović, G. Jovanović, B. Marković
{"title":"DTA/TG analysis of mechanochemicaly activated sodium carbonate","authors":"Nataša Đorđević, Slavica Mihajlović, G. Jovanović, B. Marković","doi":"10.5937/podrad2138047q","DOIUrl":"https://doi.org/10.5937/podrad2138047q","url":null,"abstract":"Sodium carbonate is a material that is very good sorbent of carbon dioxide from the atmosphere, and it is a reason of it is increasing importance in environmental protection. In order to improve it is sorption characteristics, activation of Na2CO3 was performed by mechanochemical procedure and monitoring of changes during the relaxation time. This research is based on differential thermal analysis with thermogravimetry, in order to determine the changes that occurred on the activated samples during the relaxation period under controlled conditions. Sodium carbonate was activated for 2 and 7 minutes in a vibro mill, and then the activated samples were deposited in at room temperature and atmosphere of carbon dioxide at a humidity of 95% for 96h.","PeriodicalId":31689,"journal":{"name":"Podzemni Radovi","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42945674","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}
引用次数: 0
Primary crusher site selection in open pit mines: Case study in Sungun copper mine 露天矿初碎机的选址——以孙岗铜矿为例
Podzemni Radovi Pub Date : 2021-06-30 DOI: 10.5937/PODRAD2138015N
Ali Nasirinezhad, Dejana Stevanović, D. Ignjatović, M. Rahmanpour
{"title":"Primary crusher site selection in open pit mines: Case study in Sungun copper mine","authors":"Ali Nasirinezhad, Dejana Stevanović, D. Ignjatović, M. Rahmanpour","doi":"10.5937/PODRAD2138015N","DOIUrl":"https://doi.org/10.5937/PODRAD2138015N","url":null,"abstract":"Facility site selection, (such as Primary or in pit Crusher location) is one of the most important steps in mine design process that has a significant impact on economy of the mining operation. This study covers an attempt to find the optimal location for primary crusher in order to support the expansion of Sungun copper mine, which is the second largest open pit mine in Iran. Recent exploration drilling has led to a considerable increase in the ore reserve. Therefore, Sungun started the studies followed with an expansion plan with the goal to increase the capacity from 14 to 28 Mt/Year within the next 8 years. In this paper, 14 effective parameters for finding the best location for a new crusher in five possible options were considered. The options were evaluated based on weighted linear combination method. The results show that the location in South East part of the open pit is the best option for locating of the new crusher. Finally, based on the economic parameters and copper price forecasts, pit optimization and sensitive analysis are applied. Results show that in the worst case, just 0.17 % of ore reserve is affected by the selected area and the minable reserve can cover 78 years of operation.","PeriodicalId":31689,"journal":{"name":"Podzemni Radovi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46025880","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}
引用次数: 0
Methodology for selection of the variant for opening the deeper parts of the Toranica mine 打开托拉尼察矿较深部分的变种选择方法
Podzemni Radovi Pub Date : 2021-06-30 DOI: 10.5937/podrad2138001d
Nikolinka Doneva, Z. Despodov, Stojanče Mijalkovski, M. Hadži-Nikolova
{"title":"Methodology for selection of the variant for opening the deeper parts of the Toranica mine","authors":"Nikolinka Doneva, Z. Despodov, Stojanče Mijalkovski, M. Hadži-Nikolova","doi":"10.5937/podrad2138001d","DOIUrl":"https://doi.org/10.5937/podrad2138001d","url":null,"abstract":"Opening an underground mine or part of it presents complex and responsible issue, which affects the economy and effectiveness of the mine operation. This paper presents a methodology for selecting the optimal variant for opening, the lead-zinc ore mine Toranica, Macedonia. Six variants of opening and haulage of ore and waste rocks in the deeper parts of the ore deposit have been considered. After the performed analysis, the optimal variant for opening and haulage for the Toranica mine was determined.","PeriodicalId":31689,"journal":{"name":"Podzemni Radovi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48962529","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}
引用次数: 0
Comparative analysis of fragmentation models for undeground blasting 地下爆破破碎模型的对比分析
Podzemni Radovi Pub Date : 2021-01-01 DOI: 10.5937/podrad2139029f
C. de
{"title":"Comparative analysis of fragmentation models for undeground blasting","authors":"C. de","doi":"10.5937/podrad2139029f","DOIUrl":"https://doi.org/10.5937/podrad2139029f","url":null,"abstract":"This work was carried out in the context of an internship at the company O-Pitblast, as part of creating and developing UG software. During the work, topics such as the prediction of rock mass fragmentation in a tunnel were addressed moving on to explaining the functioning of the different models, along with the entire workflow and the formulas used by each of them are addressed. The Kuz-Ram and Swebrec models were studied to predict tunnel blast fragmentation, in which case study of a Finish mine (Kittila) was used, and the modelled curves were compared with the actual curve taken from a blast.","PeriodicalId":31689,"journal":{"name":"Podzemni Radovi","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71024669","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}
引用次数: 0
Mining method selection for underground mining with the application of VIKOR method 应用VIKOR法进行地下开采方法的选择
Podzemni Radovi Pub Date : 2021-01-01 DOI: 10.5937/podrad2139011m
Stojanče Mijalkovski, Z. Despodov, D. Mirakovski, V. Adjiski, Nikolinka Doneva, Daniela Mijalkovska
{"title":"Mining method selection for underground mining with the application of VIKOR method","authors":"Stojanče Mijalkovski, Z. Despodov, D. Mirakovski, V. Adjiski, Nikolinka Doneva, Daniela Mijalkovska","doi":"10.5937/podrad2139011m","DOIUrl":"https://doi.org/10.5937/podrad2139011m","url":null,"abstract":"Multi-criteria decision making is widely used in mining to solve a variety of problems, as well as to support the mine planning and design process. The choice of the mining method of excavation for underground exploitation is a very complex and responsible matter, and support in the application of multi-criteria decision-making methods are of great importance of making the final decision. This paper will present the scientific methodology for the mining method selection by the application of VIKOR method, which gives the results of compromise alternatives.","PeriodicalId":31689,"journal":{"name":"Podzemni Radovi","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71024617","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}
引用次数: 2
Ranking of potential coal deposits in order to make investment decisions to open new mines in Serbia 对潜在的煤矿进行排序，以便作出在塞尔维亚开设新煤矿的投资决定
Podzemni Radovi Pub Date : 2021-01-01 DOI: 10.5937/podrad2139043t
Aleksandra Tomić
{"title":"Ranking of potential coal deposits in order to make investment decisions to open new mines in Serbia","authors":"Aleksandra Tomić","doi":"10.5937/podrad2139043t","DOIUrl":"https://doi.org/10.5937/podrad2139043t","url":null,"abstract":"For investments in the field of coal exploitation in the Republic of Serbia, in the future investment analyzes show significant results, although the \"Green Agenda\" aims to reduce until the end of this process in 2050. New ore and mineral deposits are also emerging, which will also require the opening of new mines in the future, and the choice of investment variant by ranking potential deposits directly depends on the amount of reserves but also on high environmental standards.","PeriodicalId":31689,"journal":{"name":"Podzemni Radovi","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71024718","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}
引用次数: 0
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