A computational study of particulate emissions from an open pit quarry under neutral atmospheric conditions |
| |
| Authors: | S.A. Silvester I.S. Lowndes D.M. Hargreaves |
| |
| Affiliation: | 1. ANSYS UK Ltd, Sheffield, UK;2. Process and Environmental Research Division, Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, UK;1. College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao, 266590, China;2. State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China;1. Minerals Metals and Materials Technology Centre, National University of Singapore, Kent Ridge 117576, Singapore;2. Mechanical Engineering, Masdar Institute of Science and Technology, Masdar City, Abu Dhabi 54224, United Arab Emirates;3. Department of Mining and Materials Engineering, McGill University, Montreal, Québec H3A 2B2, Canada;4. Department of Bioresource Engineering, McGill University, Québec H9X 3V9, Canada;1. Department of Mining Engineering, Indian Institute of Technology Kharagpur, Kharagpur, India;3. Department of Chemistry, University of Pune, Pune, India;4. Department of Chemistry, Dr. Bhim Rao Ambedkar University, Agra, India;1. Faculty of Mining and Materials Engineering, Urmia University of Technology, Urmia, Iran;2. School of Engineering, University of British Columbia, Okanagan Campus, BC, Canada;3. Faculty of Engineering, Tarbiat Modares University, Tehran, Iran |
| |
| Abstract: | The extraction of minerals from surface mines and quarries can produce significant fugitive dust emissions as a result of site activities such as blasting, road haulage, loading, crushing and stockpiling. If uncontrolled, these emissions can present serious environmental, health, safety and operational issues impacting both site personnel and the wider community.The dispersion of pollutant emissions within the atmosphere is principally determined by the background wind systems characterized by the atmospheric boundary layer (ABL). This paper presents an overview of the construction and solution of a computational fluid dynamics (CFD) model to replicate the development of the internal ventilation regime within a surface quarry excavation due to the presence of a neutral ABL above this excavation. This model was then used to study the dispersion and deposition of fugitive mineral dust particles generated during rock blasting operations. The paths of the mineral particles were modelled using Lagrangian particle tracking. Particles of four size fractions were released from five blast locations for eight different wind directions.The study concluded that dependent on the location of the bench blast within the quarry and the direction of the wind, a mass fraction of between 0.3 and 0.6 of the emitted mineral particles was retained within the quarry. The retention was largest when the distance from the blast location to the downwind pit boundary was greatest. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
