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  • Occurrence of carbon nanotubes and implication for the siting of elements in selected anthracites 

    Silva, Luis F. O.; Crissien, Tito J.; Hoffmann Sampaio, Carlos; Howe, James C.; Dai, Shifeng (2020-03-01)
    Article
    Restricted access - publisher's policy
    Petrographic, geochemical, and electron microbeam investigations of selected anthracites and anthracite-rank coaly shales were conducted. The Pennsylvania, Rhode Island, and KwaZu-Natal anthracites show an enrichment in ...

  • Ventilation friction factor determination and comparison: two case studies of potash mining 

    Bascompta Massanes, Marc; Sanmiquel Pera, Lluís; Anticoi Sudzuki, Hernán Francisco; Oliva Moncunill, Josep (2019-10)
    Article
    Open Access
    Friction factor is a crucial parameter in assessing and modelling ventilation systems in underground mining. However, the development of a mine along its life-cycle can complicate the airflow supply required at the working ...

  • High-pressure grinding rolls: model validation andfunction parameters dependency on processconditions 

    Anticoi Sudzuki, Hernán Francisco; Guasch Cascallo, Eduard; Oliva Moncunill, Josep; Alfonso Abella, María Pura; Bascompta Massanes, Marc; Sanmiquel Pera, Lluís (Elsevier, 2019)
    Article
    Open Access
    A model for High Pressure Grinding Rolls (HPGR) was developed in this work based on thewidely used Population Balance Model (PBM). This approach uses a variety of different func-tions one of which is the breakage distribution ...

  • Fire resistance performance of concrete-PVC panels with polyvinyl chloride (PVC) stay in place (SIP) formwork 

    Murillo, Michel A.; Tutikian, Bernardo F.; Ortolan, Vinícius De Kayser; Hoffmann Sampaio, Carlos (Elsevier, 2019-09-01)
    Article
    Open Access
    Stay-in-place (SIP) formwork is a more-practical alternative to traditional steel or wood formworks due to its improved constructability and durability. The aim of this paper was to study the fire resistance performances ...

  • Modeling the liberation of comminuted scheelite using mineralogical properties 

    Hamid, Sarbast; Alfonso Abella, María Pura; Oliva Moncunill, Josep; Anticoi Sudzuki, Hernán Francisco; Guasch Cascallo, Eduard; Hoffmann Sampaio, Carlos; García-Vallès, Maite; Escobet Canal, Teresa (2019-09-03)
    Article
    Open Access
    In this paper, the modeling of the liberation of scheelite is presented. A pattern of concentration experiments was performed to investigate the scheelite liberation and distribution density calculation procedure. In this ...

  • Permian–Triassic red-stained albitized profiles in the granitic basement of NE Spain: evidence for deep alteration related to the Triassic palaeosurface 

    Fàbrega, Carles; Parcerisa Duocastella, David; Thiry, Médard; Franke, Christine; Gurenko, Andrey; Gómez Gras, David Manuel; Solé, Jesús; Travé, Anna (2019-10-01)
    Article
    Restricted access - publisher's policy
    Extensive areas of the Variscan granitic basement in NE Spain display profiles of red-stained albitized facies characterized by albitization of Ca-plagioclase, chloritization of biotite and microclinization of orthoclase, ...

  • Airflow stability and diagonal mine ventilation system optimization: a case study 

    Bascompta Massanes, Marc; Sanmiquel Pera, Lluís; Zhang, Jiang Ji Ho (2018-09-01)
    Article
    Open Access
    Airflow reverse is a severe problem in an underground ventilation system. In addition, the airflow stability and safety production can be seriously affected by the problem of air velocity overrun in the roadways. In this ...

  • Analysis of a historical accident in a Spanish coal mine 

    Sanmiquel Pera, Lluís; Bascompta Massanes, Marc; Anticoi Sudzuki, Hernán Francisco (2019-09-26)
    Article
    Open Access
    There has been a long history of coal mine accidents and these, usually, involve serious injuries, fatalities, and the destruction of facilities. In the seventies, an explosion killed 28 miners in a Spanish coal mine. This ...

  • The importance of mineralogical knowledge in the sustainability of artisanal gold mining: a mid-south Peru case 

    Alfonso Abella, María Pura; Anticoi Sudzuki, Hernán Francisco; Yubero de Mateo, Maria Teresa; Bascompta Massanes, Marc; Henao, Laura; García-Vallès, Maite; Palacios Ubach, Silvia; Yáñez González, Juan Alberto (2019-06-01)
    Article
    Open Access
    Covenantee:  Red Social / Sociedad Nacional de Minería en Pequeña Escala / Alianza por la Minería Responsable
    Mineralogy and gold processing techniques from several mining areas of the Nazca-Ocoña gold belt, Mid-South Peru, were investigated to assess the efficiency of gold extraction methods in relation to their mineralogy. The ...

  • Valoración de los accidentes graves y mortales en las minas españolas entre los años 2013 y 2017 

    Freijo Álvarez, Modesto; Sanmiquel Pera, Lluís; Montañá Puig, Juan; Romero Durán, David (2019-06-25)
    Article
    Open Access
    La industria minera es considerada como una de las industrias más peligrosas. Hay la necesidad de una gestión eficaz de la salud y de la seguridad en el trabajo para salvaguardar a los trabajadores. El objetivo de este ...

  • Optimizing the selective precipitation of iron to produce yellow pigment from acid mine drainage 

    de Almeida Silva, Rodrigo; Secco, Marina Paula; Lermen, Richard Thomas; Homrich Schneider, Ivo André; Navarro Hidalgo, Gelsa Edith; Hoffmann Sampaio, Carlos (2019-05-01)
    Article
    Restricted access - publisher's policy
    Acid mine drainage (AMD) in the coal mining industry is recognized as one of the major sources of environmental damage. The active treatment of AMD involves adding alkaline reagents to wastewater so as to raise pH and to ...

  • CSE algorithm: ‘canal survey estimation’ to evaluate the flow rate extractions and hydraulic state in irrigation canals 

    Bonet Gil, Enrique; Gómez Valentín, Manuel; Yubero de Mateo, Maria Teresa; Fernández-Francos, Joaquín (2017-01)
    Article
    Open Access
    One of the main problems in water management of irrigation systems is the control of the equitable distribution of water among different orifice offtakes. The difficulty of managing a canal is partly caused by the lack of ...

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