Role of meteorological parameter and pit geometry on particulate matter concentration in a surface mine

摘要

Several studies have been reported about the particulate matter pollution due to surface mining activities. Limited measurements and modelling have been carried out to explain particulate matter emission and dispersion from surface mines. No study has been conducted to understand the particulate matter profile inside a mine during the period; it is emitted from a source and its final escape from the mine boundary. This study is a first approach in this direction. The paper deliberates the findings of a study based on field measurement that aimed at assessing particulate matter profile inside a surface mine where no significant activities are being carried out and thus gives a baseline scenario. It is observed that first bench from the surface experienced elevated particulate matter concentration, possibly due to air trajectory creating a low wind velocity zone there. Initial wind profile modelling supports this hypothesis. With increase of depth, air velocity increases and concentration of coarse particles drops faster than concentration of fine particles in mine air. A comparison of this study with future studies in operating mines will give insight into the role of mining activities in changing the dispersion pattern and therefore particulate matter profile inside a mine.