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Numerical modelling of biostabilisation for a coal mine overburden dump slope
Institution:1. Scientists, Environmental Management Group, Central Mining Research Institute, Dhanbad 826-001, India;2. Department of Mining Engineering, Institute of Technology, Banaras Hindu University, Varanasi 221-005, India;1. Department of Civil Engineering, University of Bristol, Queens Building, University Walk, Bristol, BS8 1TR, UK;2. Department of Civil Engineering, Maltepe University, Turkey;3. Department of Civil Engineering, Bogazici University, Turkey;1. Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A & F University, Yangling, Shaanxi 712100, China;2. Institute of Water Saving Agriculture in Arid Areas of China (IWSA), Northwest A&F University, Yangling 712100, China;3. Biosystems & Agricultural Engineering Dept., Oklahoma State University, Stillwater, OK 74078, USA;1. Department of Civil and Environmental Engineering, University of Florence, Florence, Italy;2. CNR Italian National Research Council - LaMMA, Sesto Fiorentino, Italy;3. Pontchartrain Institute for Environmental Sciences - University of New Orleans, New Orleans, LA, USA;4. IHE Delft Institute for Water Education, Delft, Netherlands;5. Leichtweiß-Institute for Hydraulic Engineering and Water Resources - TU Braunschweig, Braunschweig, Germany;1. Shenzhen Key Laboratory of Smart Structural System in Civil Engineering, Harbin Institute of Technology, Shenzhen, China;2. School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen, China;3. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China;4. PowerChina Eco-Environmental Group Co., LTD., China
Abstract:An integrated study on biological stabilisation of the dump slope has indicated that biological reclamation should be considered for long term stability of dump. The grasses have good soil binding capacity and help to control soil erosion and improve dump stability. Native grasses viz. Bamboo (Dendrocalmus strictus) and Kashi (Saccharum spontaneum) are the important constituents of grass species which can stabilise the dump slopes. Field observation of root development of these grass species has indicated that the roots can proliferate upto 0.5 m depth on a coal mine overburden dump after three years of vegetation. From the numerical modelling it has been analysed that roots of these grasses which significantly enhance the factor of safety of dump slope from 1.2 to 1.4 have a positive role in maintaining long term stability.
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