Rem-Revista Escola De Minas最新文献_第9页

Development of a Method to Measure Charges in Tumbling Mills 滚筒机装料测量方法的发展

Rem-Revista Escola De Minas Pub Date : 2014-09-01 DOI: 10.1590/S0370-44672014000300011

E. Araujo, H. Delboni

引用次数: 1

Estimation of friction contribution in the behavior of steel-concrete composite beams with flexible shear connectors 含柔性剪力连接件钢-混凝土组合梁性能中摩擦贡献的估计

Rem-Revista Escola De Minas Pub Date : 2014-09-01 DOI: 10.1590/S0370-44672014000300002

G. Queiroz, H. Carvalho, F. Rodrigues, Michèle Pfeilo

{"title":"Estimation of friction contribution in the behavior of steel-concrete composite beams with flexible shear connectors","authors":"G. Queiroz, H. Carvalho, F. Rodrigues, Michèle Pfeilo","doi":"10.1590/S0370-44672014000300002","DOIUrl":"https://doi.org/10.1590/S0370-44672014000300002","url":null,"abstract":"A shear connector, developed to be applied to a composite beam whose steel profile is a thin-walled box profile, displayed much greater flexibility than the conventional welded shear connector, leading to particular issues in the composite beam behaviour. One of these issues is the role played by friction at the interface between the steel profile and the slab which, under particular circumstances, may be relevant for serviceability limit states and also for ultimate limit states. The Brazilian and American Standards do not yet recognize the friction contribution in the behaviour of composite beams, though they recognize this contribution in composite slabs. This paper presents the experimental tests carried out with and without friction contribution on simple supported composite beams with flexible connectors and the numerical models developed to simulate the behaviour of the tested beams. The experimental tests revealed significant increases in strength and stiffness of the composite beam due to friction contribution and the comparisons between numerical and experimental results displayed good correlations.","PeriodicalId":54498,"journal":{"name":"Rem-Revista Escola De Minas","volume":"2 1","pages":"253-258"},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73555846","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: 6

Technical and operational aspects of tunnel rounds in artisanal underground mining 手工地下采矿巷道掘进的技术和操作问题

Rem-Revista Escola De Minas Pub Date : 2014-09-01 DOI: 10.1590/S0370-44672014000300010

J. Seccatore, Lorenzo Magny, G. Tomi

{"title":"Technical and operational aspects of tunnel rounds in artisanal underground mining","authors":"J. Seccatore, Lorenzo Magny, G. Tomi","doi":"10.1590/S0370-44672014000300010","DOIUrl":"https://doi.org/10.1590/S0370-44672014000300010","url":null,"abstract":"In the world today, due to the current high price of gold, thousands of artisanal small-scale mines operate without the financial or technical capacity to upgrade their production methods, often using equipment and working methods that were forsaken decades ago in the conventional mining industry. This article illustrates, with a practical example, that it is possible to achieve the modern requirements of quality, safety and productivity, while operating with mining equipment that basically possesses the same characteristics as that employed in the 1950s. The operation involved the excavation of a 6 meter long tunnel and over 25 stoping sections in both rock and concrete by drilling and blasting in an underground gold mine. The article describes how the main operational problems were overcome. An effective drilling pattern was designed in order to be easily achievable with the limited local equipment. The behavior of the local nitrate explosive was effectively predicted and managed. The interaction with the drilling teams was managed in order to determine a meeting point between their traditional working methods and the scientific view of the engineer. At the end of the article some general guidelines are proposed for the management of similar situations, in order to improve the efficiency, productivity and safety of drill and blast operations in small-scale mines.","PeriodicalId":54498,"journal":{"name":"Rem-Revista Escola De Minas","volume":"54 1","pages":"303-310"},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73505191","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: 7

Study of non-conventional fuels for explosives mixes 炸药混合燃料的非常规燃料研究

Rem-Revista Escola De Minas Pub Date : 2014-09-01 DOI: 10.1590/S0370-44672014000300009

Salatiel Assis Resende, Valdir Costa e Silva, H. Lima

引用次数: 6

Methodology for selection of samples from borehole probe for technological characterization of iron ore 铁矿工艺表征用钻孔探头取样的选择方法

Rem-Revista Escola De Minas Pub Date : 2014-09-01 DOI: 10.1590/S0370-44672014000300005

Gesner José Ilário dos Santos, D. Ribeiro, C. Pereira

引用次数: 0

Multi-Criteria decision aid methodology applied to highway truck selection at a mining company 多准则决策辅助方法在某矿业公司公路卡车选择中的应用

Rem-Revista Escola De Minas Pub Date : 2014-09-01 DOI: 10.1590/S0370-44672014000300007

Wilson Trigueiro de Sousa Junior, M. Souza, I. E. Cabral, M. Diniz

引用次数: 7

Agility based software development for truss design 基于敏捷的桁架设计软件开发

Rem-Revista Escola De Minas Pub Date : 2014-09-01 DOI: 10.1590/S0370-44672014000300003

T. Forti, G. C. Longhin, N. Forti, J. Requena

{"title":"Agility based software development for truss design","authors":"T. Forti, G. C. Longhin, N. Forti, J. Requena","doi":"10.1590/S0370-44672014000300003","DOIUrl":"https://doi.org/10.1590/S0370-44672014000300003","url":null,"abstract":"This article describes the development of an application for structural analysis of tubular trussed girders. Such structural components are widely used on roofs for which long span components are a necessity, e. g., supermarkets, distribution centers, etc. The application supplies hints to the project engineers as to the most economic solutions for a combination of span, loads, and other characteristics. Software development techniques are also explored. Such techniques can be divided into two large groups. In the first one, which is most widely known and used, software development complies with very rigid planning, where processes are more important than skills. This methodology is known as the Rigorous Development System (RDS). The second group, called Agile Development System (ADS), is conceived as an option for those not aligned with the RDS rules. This text describes the experience of an ADS based software development for truss design. In Section 2, the basis of ADS is presented. Section 3 describes the truss design application and civil engineering related concepts. Section 4 brings an example illustrating the application. Conclusions are in Section 5.","PeriodicalId":54498,"journal":{"name":"Rem-Revista Escola De Minas","volume":"9 1","pages":"259-264"},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81187745","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

Claude Henri Gorceix: the man, teacher and work 克劳德·亨利·戈尔塞克斯:男人、老师和工作

Rem-Revista Escola De Minas Pub Date : 2014-09-01 DOI: 10.1590/S0370-44672014000300012

Christiano Barbosa da Silva

{"title":"Claude Henri Gorceix: the man, teacher and work","authors":"Christiano Barbosa da Silva","doi":"10.1590/S0370-44672014000300012","DOIUrl":"https://doi.org/10.1590/S0370-44672014000300012","url":null,"abstract":"Chemistry, and Physical-Electrochemistry. Once André Malraux said that “as it is impossible to resuscitate the dead, we resuscitate the dreams” and popular wisdom complements: “it is the most beautiful teaching that can be linked to the youth of today and the men of tomorrow”. Herein, one of these dreams is relived. It begins 150 years ago with the birth of CLAUDE HENRI GORCEIX in Saint Denis des Murs (Haute Vienne), a small village of only four houses, on October 19, 1842, son of Antoine Gorceix and Valerie Cecile Gorceix. When he was almost 9 years old, his father died and his mother, together with her seven children, went to live in Saint Leonard. At 12 years of age, he obtained a scholarship at the Liceu de Limoges, where he distinguished himself for his active intelligence and devotion to his work. He attributed his successes to his professors for whom he preserved an undisputable remembrance until the end of his life. After receiving his diploma in 1860, his scholarship was transferred to the Liceu de Douai, where a mathematics course prepared him for the Éscole Normale (sciences), the preparation of which was completed at the Instituição Massin in Paris. The following year, he entered the École Normale (Sciences). Here, he demonstrated a passion for Geology and Mineralogy, subjects in which he was said to be not only brilliant, but also very active, forecasting a career as a geologist. He finished the course in 1866 with a “Generalist in physical sciences and mathematics” diploma. Appointed Professor of Physics at the Liceu de Angoulême, he returned to Éscole as aggregated preparer of Geology and afterwards was sent to Athens as a science professor at the famous L’École française d’Anthènes.","PeriodicalId":54498,"journal":{"name":"Rem-Revista Escola De Minas","volume":"4 1","pages":"319-340"},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91179073","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: 1

Technical feasibility of the incorporation of rice husk ash, sludge from water treatment plant and wood ash in clay for ceramic coating 稻壳灰、水处理厂污泥、木灰掺入陶瓷涂料粘土的技术可行性

Rem-Revista Escola De Minas Pub Date : 2014-08-04 DOI: 10.1590/S0370-44672014000300006

E. Medeiros, Rosa Maria Sposto, G. Neves, R. Menezes

引用次数: 0

Ductile behavior of optical glass in single point diamond turning 光学玻璃在单点金刚石车削中的延展性行为

Rem-Revista Escola De Minas Pub Date : 2014-06-01 DOI: 10.1590/S0370-44672014000200006

C. Pagotto, J. Duduch, R. G. Jasinevicius

引用次数: 1