TY - JOUR
T1 - Application of Coal Ash to Postmine Land for Prevention of Soil Erosion in Coal Mine in Indonesia
T2 - Utilization of Fly Ash and Bottom Ash
AU - Matsumoto, Shinji
AU - Ogata, Shunta
AU - Shimada, Hideki
AU - Sasaoka, Takashi
AU - Kusuma, Ginting J.
AU - Gautama, Rudy S.
N1 - Funding Information:
This research was supported by grants from the Advanced Graduate Programin Global Strategy for Green Asia, Kyushu University, and the Mitsui Matsushima Co., Ltd. The authors would like to express their gratitude and appreciation to the coal power plants for providing the coal ash samples and to the mine for kind assistance with field work. The authors also acknowledge the work of colleagues in the Laboratory of Rock Engineering and Mining Machinery, Kyushu University
Publisher Copyright:
© 2016 Shinji Matsumoto et al.
PY - 2016
Y1 - 2016
N2 - The increase in the number of coal-fired power plants with the increase in coal production and its consumption has caused the problem of the treatment of a large amount of coal ash in Indonesia. In the past studies, coal ash was applied to postmine land with the aim of improving soil conditions for plant growth; however, heavy rain in the tropical climate may cause soil erosion with the change in soil conditions. This study presents the effects of application of coal ash to postmine land on soil erosion by performing the artificial rainfall test as well as physical testing. The results indicate that the risk of soil erosion can be reduced significantly by applying the coal ash which consists of more than 85% of sand to topsoil in the postmine land at the mixing ratio of over 30%. Additionally, they reveal that not only fine fractions but also microporous structures in coal ash enhance water retention capacity by retaining water in the structure, leading to the prevention of soil erosion. Thus, the risk of soil erosion can be reduced by applying coal ash to topsoil in consideration of soil composition and microporous structure of coal ash.
AB - The increase in the number of coal-fired power plants with the increase in coal production and its consumption has caused the problem of the treatment of a large amount of coal ash in Indonesia. In the past studies, coal ash was applied to postmine land with the aim of improving soil conditions for plant growth; however, heavy rain in the tropical climate may cause soil erosion with the change in soil conditions. This study presents the effects of application of coal ash to postmine land on soil erosion by performing the artificial rainfall test as well as physical testing. The results indicate that the risk of soil erosion can be reduced significantly by applying the coal ash which consists of more than 85% of sand to topsoil in the postmine land at the mixing ratio of over 30%. Additionally, they reveal that not only fine fractions but also microporous structures in coal ash enhance water retention capacity by retaining water in the structure, leading to the prevention of soil erosion. Thus, the risk of soil erosion can be reduced by applying coal ash to topsoil in consideration of soil composition and microporous structure of coal ash.
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U2 - 10.1155/2016/8386598
DO - 10.1155/2016/8386598
M3 - Article
AN - SCOPUS:84984698680
VL - 2016
JO - Advances in Materials Science and Engineering
JF - Advances in Materials Science and Engineering
SN - 1687-8434
M1 - 8386598
ER -
