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Numerical study on DPM dispersion and distribution in an underground development face based on dynamic mesh

International Journal of Mining Science and Technology 2020年第4期30卷 471-475页

作者： Ping Chang Guang Xu Jinxin Huang WA School of Mines MineralsEnergy and Chemical EngineeringCurtin UniversityKalgoorlieWA 6430Australia Department of Mining Engineering Missouri University of Science and TechnologyRollaMO 65409USA

In 2012,the International Agency for Research on Cancer(IARC)classified diesel particulate matter(DPM)as a carcinogen to *** the increased usage of diesel equipment in underground mines,miners have a high risk of over-exposure to DPM,which has drawn many concerns from the *** study used computational fluid dynamics(CFD)to analyse the DPM dispersion and concentration distribution characteristics in an underground development face based on an onsite *** DPM emitted from a moving loader under a forcing auxiliary ventilation system was *** motion of the load-haul-dump(LHD)in the tunnel was represented by a dynamic mesh *** species transport approach was applied to study the DPM *** DPM concentration zones were then identified based on the simulation *** results could provide guidelines for work practices and be helpful to an optimum auxiliary ventilation design to reduce underground miner exposure.

关键词： diesel particulate matter Underground mines Ventilation Computational fluid dynamics Dynamic mesh

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diesel engine exhaust exposures in two underground mines

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International Journal of Mining Science and Technology 2017年第4期27卷 641-645页

作者： Debia Maximilien Couture Caroline Njanga Pierre-Eric Neesham-Grenon Eve Lachapelle Guillaume Coulombe Hugo Hallé Stéphane Aubin Simon Department of Environmental and Occupational Health School of Public Health Universite de Montreal 2375 chemin de la Cote Ste-Catherine Montreal H3T IA8 Canada Department of Mechanical Engineering F.cole de Technologie Superieure 1100 rue Notre-Dame Ouest Montreal H3C 1K3 Canada Health and Safety Agnico Eagie Mines 145 King Street East Suite 400 Toronto MSC 2Y7 Canada Health and Safety Westwood Mine (IAMGOLD) Chemin Arthur Doyon PreissacJOY 2EO Canada Institut de recherche Robert-Sauve en sante et en securite du travail (IRSST) 505 Boul. de Maisonneuve Ouest Montreal H3A 3C2 Canada

Exposure to diesel engine exhaust(DE) is a major concern in underground mines. It has been linked to cardiopulmonary diseases and is classified as a human carcinogen. The goal of this study is to assess DE exposures in workers at two underground gold mines, to compare exposure levels within and between the mines, and to compare different methods of measuring DE exposures, namely respirable combustible dust(RCD), elemental carbon(EC) and total carbon(TC). Ambient and personal breathing zone(PBZ) measurements were taken. Side-by-side monitoring of RCD and of the respirable fraction of EC and TC(EC_Rand TC_R) was carried out in the workers' breathing zone during full-shift *** ambient measurements, in addition to EC_R, TC_Rand RCD, a submicron aerosol fraction(less than 1 mm) of EC and TC was also sampled(EC_1and TC_1). Average ambient results of 240 mg/m^3 in RCD, 150 mg/m^3 in EC_Rand 210 mg/m^3 in TC_Rare obtained. Average PBZ results of 190 mg/m^3 in RCD,84 mg/m^3 in EC3Rand 150 mg/min TC_Rare obtained. Very good correlation is found between EC_Rand EC_1 with a Pearson correlation coefficient of 0.99(p diesel related organic carbon can skew the interpretation of results when relying only on TC data.

关键词： diesel exposure Underground mine Respirable combustible dust Elemental carbon Total carbon diesel particulate matter Similar exposure groups

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A comparative study of particle size distribution from two oxygenated fuels and diesel fuel

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Frontiers of Environmental Science & Engineering 2010年第1期4卷 30-34页

作者： Xiaoyan SHI Kebin HE Jie ZHANG Yongliang MA Yunshan GE Jianwei TAN Department of Environmental Science and Engineering Tsinghua UniversityBeijing 100084China National Laboratory of Auto Performance and Emission Test Beijing Institute of TechnologyBeijing 100081China

Oxygenated fuels are known to reduce particulate matter(PM)emissions from diesel *** this study,100%soy methyl ester(SME)biodiesel fuel(B100)and a blend of 10%acetal denoted by A-diesel with diesel fuel were tested as oxygenated *** size and number distributions from a diesel engine fueled with oxygenated fuels and base diesel fuel were measured using an Electrical Low Pressure Impactor(ELPI).Measurements were made at ten steady-state operational modes of various loads at two engine *** was found that the geometric mean diameters of particles from SME and Adiesel were lower than that from base diesel *** to diesel fuel,SME emitted more ultra-fine particles at rated speed while emitting less ultra-fine particles at maximum ***-fine particle number concentrations of A-diesel were much higher than those of base diesel fuel at most test modes.

关键词： oxygenated fuel diesel particulate matter particle size distribution biofuel

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Design of push-pull system to control diesel particular matter inside a dead-end entry

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International Journal of Coal Science & Technology 2015年第3期2卷 237-244页

作者： Yi Zheng Magesh Thiruvengadam Hai Lan Jerry C. Tien Department of Mining & Nuclear Engineering MissouriUniversity of Science and Technology Rolla MO 65401USA Clean Air Power Inc. Poway CA 92064 USA Division of Mining and Resources Engineering Departmentof Civil Engineering Monash University Clayton CampusWellington Road Clayton VIC 3800 Australia

diesel particulate matter （DPM） is considered to be carcinogenic after prolonged exposure. With more diesel- powered equipment used in underground mines, miners＇ exposure to DPM has become an increasing concern. This paper used computational fluid dynamics method to study the DPM dispersion in a dead-end entry with loading operation. The effects of different push-pull ventilation systems on DPM distribution were evaluated to improve the working conditions for underground miners. The four push-pull systems considered include： long push and short pull tubing; short push and long pull tubing, long push and curved pull tubing, and short push and curved pull tubing. A species transport model with buoyancy effect was used to examine the DPM dispersion pattern with unsteady state analysis. During the 200 s of loading operation, high DPM levels were identified in the face and dead-end entry regions. This study can be used for mining engineer as guidance to design and setup local ventilation, select DPM control strategies and for DPM annual training for underground miners.

关键词： diesel particulate matter Computational fluid dynamics Ventilation Underground condition Push-pullsystem

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