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Rock excavation methods in urban areas 城市地区岩石开挖方法
Podzemni Radovi Pub Date : 2023-01-01 DOI: 10.5937/podrad2342047m
S. Milanović, L. Kricak, Milanka Negovanović, Nikola Simić, Jovan Marković, Nikola Đokić
{"title":"Rock excavation methods in urban areas","authors":"S. Milanović, L. Kricak, Milanka Negovanović, Nikola Simić, Jovan Marković, Nikola Đokić","doi":"10.5937/podrad2342047m","DOIUrl":"https://doi.org/10.5937/podrad2342047m","url":null,"abstract":"The increased volume of construction works, which includes the construction of new residential and business buildings, hotels, garages, shopping centers, and similar, is increasingly common in urban areas. Such works are increasingly coming into contact with different types of problems during construction, as one of these problems we single out the appearance of solid rock mass during excavation at the construction sites of future buildings foreseen in the construction project. During the construction of facilities or part of the building, which includes the underground premises of a building, it is necessary to excavate the material on site, however, due to its physical and mechanical characteristics, it is not always possible to excavate this material with conventional machinery. The composition of the material that is removed is sometimes in the form of solid rock, and thus its excavation is more complicated, so other methods must be used: controlled blasting, application of expansive mortars, etc. This paper presents some of the possibilities of removing solid rock material for the purpose of smooth construction of buildings.","PeriodicalId":31689,"journal":{"name":"Podzemni Radovi","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71025736","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
Legal framework for recultivation of degraded areas caused by mining exploitation 矿业开采造成的退化地区恢复的法律框架
Podzemni Radovi Pub Date : 2023-01-01 DOI: 10.5937/podrad2342027g
R. Gaćina
{"title":"Legal framework for recultivation of degraded areas caused by mining exploitation","authors":"R. Gaćina","doi":"10.5937/podrad2342027g","DOIUrl":"https://doi.org/10.5937/podrad2342027g","url":null,"abstract":"During the exploitation of coal, both surface and underground exploitation systems damage larger or smaller areas of land. Experiences show that land damage is significantly greater with the surface exploitation system, where the content of the space is degraded not only in the contour of the mine and the surrounding area, but changes are made in the natural flows and conditions as well. The article presents the results of a study of the regulatory framework the issues of reclamation in some world countries also in Serbia. Practical experience of reclamation has shown that utilisation and devastation by mining activities present not only danger to affected areas but also an opportunity to correct negative developments and to plan in accordance with the expectations of the population and respected to laws.","PeriodicalId":31689,"journal":{"name":"Podzemni Radovi","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71025103","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
X-ray structural analysis of the BaO and TiO2 starting compounds and initial mechanochemical activation BaO和TiO2起始化合物的x射线结构分析及初始机械化学活化
Podzemni Radovi Pub Date : 2023-01-01 DOI: 10.5937/podrad2342037q
Nataša Đorđević, M. Vlahović, Slavica Mihajlović
{"title":"X-ray structural analysis of the BaO and TiO2 starting compounds and initial mechanochemical activation","authors":"Nataša Đorđević, M. Vlahović, Slavica Mihajlović","doi":"10.5937/podrad2342037q","DOIUrl":"https://doi.org/10.5937/podrad2342037q","url":null,"abstract":"The aim of this research was to obtain an initial characterization of the BaO and TiO2 components, as well as to conduct preliminary research into the possibility of activating the initial components in order to obtain barium titanate. Chemical and X-ray structural analysis of the initial components was performed. In order to determine the possibility of applying a mechanochemical activator and the activation time in which the first intermediate compounds were formed by the activation of the starting substances, the system was activated for 30 minutes. After this, an X-ray structural analysis was performed and certain changes in the crystal lattice of the starting components were made. X-ray structural analysis showed that during grinding, amorphization of the initial components occurred, which is the first stage in the process of obtaining titanate, as well as the presence of a small amount of barium titanate, which is indicating the presence of an intermediate compound in the process of finally obtaining barium titanate.","PeriodicalId":31689,"journal":{"name":"Podzemni Radovi","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71025667","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
Evaluation of immiscible CO2 injection in high water production reservoir in the Pannonian basin 潘诺尼亚盆地高含水油藏非混相CO2注入评价
Podzemni Radovi Pub Date : 2023-01-01 DOI: 10.5937/podrad2342001a
I. Al-Jeboore, Danica Milićević, Bojan Martinović, Milica Ješić
{"title":"Evaluation of immiscible CO2 injection in high water production reservoir in the Pannonian basin","authors":"I. Al-Jeboore, Danica Milićević, Bojan Martinović, Milica Ješić","doi":"10.5937/podrad2342001a","DOIUrl":"https://doi.org/10.5937/podrad2342001a","url":null,"abstract":"Carbon dioxide (CO2) flooding is one of the most important and most used enhanced oil recovery (EOR) method because it does not only increase oil recovery efficiency but also is used as an underground CO2 storage. It is considered a very complex method as it involves knowing the fluid phase behavior with different CO2 concentrations. It should be noted that oil swelling (volume increase) with the dissolution of carbon dioxide has a significant effect on increase of oil recovery. When this occurs, a significant decrease in the viscosity of the oil is observed. In this study, a reservoir 3D simulation modeling approach was applied to evaluate immiscible and miscible CO2 flooding in a high WC reservoir. To reduce simulation time, the PVT composition was grouped into 5 fluid components. The 3-parameter, Peng-Robinson Equation of State (EOS) was used to match PVT experimental data by using the Schlumberger's ECLIPSE PVTi software. One-dimensional slim-tube model was defined using ECLIPSE 300 software to determine the minimum miscibility pressure (MMP) for injection of CO2. Beside this approach, an analytical MMP estimation was carried out using several correlations. Schlumberger Petrel software was used to set up a 3D simulation model of a static and dynamic model. Various scenarios of immiscible and CO2 injection have been simulated using ECLIPSE 300 software and these results have been compared.","PeriodicalId":31689,"journal":{"name":"Podzemni Radovi","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71025298","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
Influence of type and quantity of filler on change of density of sulfur concrete 填料种类和用量对含硫混凝土密度变化的影响
Podzemni Radovi Pub Date : 2023-01-01 DOI: 10.5937/podrad2342019q
Nataša Đorđević, M. Vlahović, Sanja Martinović, Slavica Mihajlović, Vladan Kašić, M. Grubišić
{"title":"Influence of type and quantity of filler on change of density of sulfur concrete","authors":"Nataša Đorđević, M. Vlahović, Sanja Martinović, Slavica Mihajlović, Vladan Kašić, M. Grubišić","doi":"10.5937/podrad2342019q","DOIUrl":"https://doi.org/10.5937/podrad2342019q","url":null,"abstract":"Concrete is a material that has been used for centuries and is often modified using polymers. In the last fifty years, synthetic polymers have been used for the modification of concrete, but also for the production of concrete. In recent decades, sulfur concrete has been an interesting product that can be used mainly in low-rise construction due to its characteristics. In this work, we used the starting mixture for the preparation of sulfur concrete (sand, elemental sulfur with the addition of modified sulfur and fillers) heated to a temperature of 120 ºC to 170 ºC and homogenized. The results of previous research on the production of sulfur concrete showed that the density of the obtained product changes depending on the type as well as the amount of filler added to the basic mixture based on raw materials. Talc, microsilicon, plate alumina and fly ash were used as fillers. The amounts of fillers were 0%, 1%, 3%, 5%, 7% and 10%.","PeriodicalId":31689,"journal":{"name":"Podzemni Radovi","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71025389","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
Sustainable development and natural resources exploitation: Brief review 可持续发展与自然资源开发:综述
Podzemni Radovi Pub Date : 2022-01-01 DOI: 10.5937/podrad2240045m
Slavica Mihajlović, Nataša Đorđević
{"title":"Sustainable development and natural resources exploitation: Brief review","authors":"Slavica Mihajlović, Nataša Đorđević","doi":"10.5937/podrad2240045m","DOIUrl":"https://doi.org/10.5937/podrad2240045m","url":null,"abstract":"Natural resources are limited and uncontrolled exploitation can have negative effects on the environment. It is necessary to find approach of their sustainable use. Sustainable development is the framework for defining strategies of continuous state and social progress, without harm to the environment and natural resources essential for human activities in the future. Model that regulates sustainable use considers strategies and legal regulations for exploitation of natural resources and energy. Goal is to ensure the sustainable use of natural resources at national and global level. Sustainable use of natural resources is directly related to environmental protection. Also, the preservation of the working and living environment is related to the degree of economic development and the level of education of the population about the importance of a healthy environment and the way of its preservation. Accelerated technological development leads to an improvement in the quality of life in all spheres of human activity, but in parallel, it creates the possibility of greater environmental degradation. Therefore, it is necessary, within the goals of the development policy of the society, to include the correct criteria that will contribute to sustainable development. Thus, we contribute to preserving the environment and balance of natural ecosystems.","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":"71025494","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
Examination of the possibility of obtaining pyrite concentrate from the flotation tailings of the Lece mine 从leece矿浮选尾矿中获得黄铁矿精矿可能性的考察
Podzemni Radovi Pub Date : 2022-01-01 DOI: 10.5937/podrad2241043l
P. Lazic, Đurica Nikšić, D. Stojanovic, T. Gavrilović
{"title":"Examination of the possibility of obtaining pyrite concentrate from the flotation tailings of the Lece mine","authors":"P. Lazic, Đurica Nikšić, D. Stojanovic, T. Gavrilović","doi":"10.5937/podrad2241043l","DOIUrl":"https://doi.org/10.5937/podrad2241043l","url":null,"abstract":"The Lece mine is characterized by the fact that it has gold and silver besides the main valuable components in the flotation concentrates of lead and zinc. Practically since the opening of the mine and flotation, research has been carried out with the aim of obtaining better technological indicators on all four valuable metals (lead, zinc, gold and silver), especially on gold. This paper represents a contribution to that research in order to increase the recovery of gold in flotation concentrates. Gold occurs in ore in several ways (native, with lead and zinc, with pyrite and quartz), which requires a complex technological scheme of gold valorization. Most of the gold is bound to galena and is valorized through lead concentrate. A smaller part of the gold is bound to zinc and is valorized through zinc concentrate. However, about 25% of the gold remains in tailings. Researchers ie. the authors of this paper tried to valorize part of the gold that is lost in the tailings by introducing a third pyrite concentrate with an increased gold content. The paper presents the results of laboratory experiments on the possibility of obtaining pyrite concentrate from the Lece tailings and a proposal for a technological scheme of the process.","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":"71025155","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
Selection of business models in unstable conditions in mining companies 矿业公司不稳定条件下的商业模式选择
Podzemni Radovi Pub Date : 2022-01-01 DOI: 10.5937/podrad2241001m
Slavica Miletić, D. Bogdanović, Goran Stojanović, Ana Milijić, Marko Trišić
{"title":"Selection of business models in unstable conditions in mining companies","authors":"Slavica Miletić, D. Bogdanović, Goran Stojanović, Ana Milijić, Marko Trišić","doi":"10.5937/podrad2241001m","DOIUrl":"https://doi.org/10.5937/podrad2241001m","url":null,"abstract":"This paper aims to rank business models for successfully overcoming socio-economic instability through criteria using an appropriate multicriteria decision-making method (MCDM). In this paper, the AHP method was used to calculate the difficulty criteria. The literature review identified and analyzed six business models: digital business models where companies will be found, competitive advantage models, global, deglobal, market models based on new products and services and customer-built business models. The findings of this research improve the understanding of several business models on the basis of which the management of mining companies can successfully overcome the socio - economically unstable situation.","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":"71025382","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
Original scientific paper examination of influence sintering temperature on mineral compounds 烧结温度对矿物化合物影响的原始科学论文检验
Podzemni Radovi Pub Date : 2022-01-01 DOI: 10.5937/podrad2240027q
Nataša Đorđević, Slavica Mihajlović
{"title":"Original scientific paper examination of influence sintering temperature on mineral compounds","authors":"Nataša Đorđević, Slavica Mihajlović","doi":"10.5937/podrad2240027q","DOIUrl":"https://doi.org/10.5937/podrad2240027q","url":null,"abstract":"Mineral materials, such as corundum, quartz and periclase are very often used in technological processes. Due to its characteristics, and chemical reaction in solid state, these minerals form very interesting and useful material, cordierite. The mineral ratio in this compound (MgO : Al2O3 : SiO2) is 2:2:5. They form cordierite, electronic ceramic, which can be sintered in a narrow temperature range, at about 1375 °C. Composition of this electronic ceramics material is is 2MgO-2Al2O3-5SiO2 (MAS) and in this research 20% mass Bi2O3 was added in the aim of decrease the sintering temperature. The effects of sintering, the composition and morphology were followed by x-ray diffraction, scanning electron microscopy and EDS analysis, as a function of sintering temperature. MAS ceramics were sintered at 1000ºC, 1100ºC and 1200ºC.","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":"71025317","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
Reducing environmental impact caused by mining activities in limestone mines 减少石灰石矿山采矿活动对环境造成的影响
Podzemni Radovi Pub Date : 2022-01-01 DOI: 10.5937/podrad2240037g
R. Gaćina, B. Dimitrijević
{"title":"Reducing environmental impact caused by mining activities in limestone mines","authors":"R. Gaćina, B. Dimitrijević","doi":"10.5937/podrad2240037g","DOIUrl":"https://doi.org/10.5937/podrad2240037g","url":null,"abstract":"Mining and its related activities have always resulted in changes in the environment and these changes can vary from one area to another. As a result of mining, several types of changes can be distinguished: destruction of land and existing vegetation, changes in terrain topography, modification in air quality, changes in surface and groundwater quality, as well as change geotechnical conditions of the rock. Environmental impact of mining has been a public concern. There is widespread global interest in mining and its sustainability, and it is focused on the need to shift mining industry to a more sustainable framework. This article describes the possibilities of how to reduce the environmental impact of limestone excavation. Successful closure must consider medium to long term post mining land use and land capability, as well as minimizing environmental impact.","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":"71025335","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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