Numerical analysis on spatial distribution for concentration and particle size of particulate pollutants in dust environment at fully mechanized coal mining face

Abstract

In this study, numerical simulation was conducted on the 3401 fully mechanized mining face in Xin'an Coal Mine regarding its serious dust pollution and complex dispersion law, based on which the spatial distribution of dust concentration and particle size was analyzed. The aim is to provide theoretical guidance for accurate and efficient spray dust reduction the 3401 mining face or similar working environment. The results show that the dust concentration in the area 23 m on the leeward side of the front drum center is about 1220–2620 mg/m3. Near the floor of the coal mining area, dust particles with the sizes of over 15.3 μm account for about 70% of the particle group due to the settlement of large-size dust. In the high-concentration dust-polluted area of the non-mining area, those with the sizes of over 12 μm account for about 40% of the particle group.