Now showing items 1-12 of 144

  • 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 ...
  • High pressure grinding rolls modelling and parameters dependency 

    Anticoi Sudzuki, Hernán Francisco (Universitat Politècnica de Catalunya, 2019)
    Dataset
    Open Access
    A model for High Pressure Grinding Rolls (HPGR) was developed in this work based on the widely used Population Balance Model (PBM). This approach uses a variety of different functions one of which is the breakage distribution ...
  • 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 ...
  • High pressure roll crusher modelling 

    Anticoi Sudzuki, Hernán Francisco (Universitat Politècnica de Catalunya, 2018)
    Dataset
    Open Access
    An improved approach is presented to model the product particle size distribution resulting from grinding in high-pressure roll crusher with the aim to be used in standard high-pressure grinding rolls (HPGR). This approach ...
  • Breakage function determination for HPGR 

    Anticoi Sudzuki, Hernán Francisco (Universitat Politècnica de Catalunya, 2018)
    Dataset
    Open Access
    The modelling of high pressure grinding rolls is described by the population balance model, a mass balance which includes several functions that are related to the mineral characteristics, material kinetics and operative ...
  • 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 ...