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Nainegali, Lohitkumar
- Constructing Structures on Backfilled Opencast Mine Spoil for Better Sustainability
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Authors
Affiliations
1 Department of Civil Engineering, Indian Institute of Technology (ISM), Dhanbad 826 004, IN
1 Department of Civil Engineering, Indian Institute of Technology (ISM), Dhanbad 826 004, IN
Source
Current Science, Vol 114, No 10 (2018), Pagination: 2053-2062Abstract
In this study we collate existing knowledge and suggest a possible methodology for construction on environmentally challenged backfilled mines to restore the sustainability of human settlement. The possibility of reconstruction on a backfill soil with a sustainable solution has been explored. The study highlights the issue of subsidence in backfilled opencast mines through a meticulous understanding of different case studies of construction on mine spoil. The prime focus of the study apart from structural and construction aspects includes the behaviour of heterogeneous mine spoil. Collapse settlement and hydrocompression are discussed to develop an understanding of failure in backfill. The study also incorporates the proposition of possible effective ground improvement treatment for improving soil behaviour through effective utilization of demolished concrete waste material. Further, ground improvement through demolished waste stone column has also been discussed. Finally, a feasible method for constructing a low-rise building on back-filled soil is proposed with available experimental data on bearing capacity. This study along with a comprehensive list of references may prove useful for conducting further research and a thorough understanding of the issues faced by the mining sector in India and other developing countries.Keywords
Opencast Mines, Backfill Soil, Collapse Settlement, Hydrocompression, Sustainability.References
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- Assessment of Overburden Dump and Highwall Slope Stability for Jambad Open Cast Coal Mine, West Bengal, India, using in Situ and Laboratory Testing
Abstract Views :220 |
PDF Views:91
Authors
Affiliations
1 Department of Civil Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad 826 004, IN
1 Department of Civil Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad 826 004, IN
Source
Current Science, Vol 123, No 2 (2022), Pagination: 184-193Abstract
In this study, in situ multichannel analysis of surface waves was performed to characterize the overburden (OB) layers for Jambad open cast coal mine, West Bengal, India. OB dump samples were also collected and laboratory tests were carried out to evaluate the compaction and strength characteristics. Stability anal-yses of the OB dump slope and highwall were carried out using the finite element-based software Optum G2 considering the configurations suggested by the Eastern Coalfield Limited, India. The stability was also assessed for seismic loading conditions considering pseudo-static loading. This study concludes with recommenda-tions for geometric configurations of the OB dump and highwall slope.Keywords
Coal Mine Overburden, Dump Slope, High-wall, Laboratory Tests, Surface WaveReferences
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- Nayak, P. K., Dash, A. and Dewangan, P., Design considerations for waste dumps in Indian opencast coal mines – a critical appraisal. In Proceedings of the second International Conference on Opencast Mining Technology and Sustainability, NCL, Singrauli, M.P., 2020, pp. 19–31.
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Abstract Views :35 |
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Authors
Affiliations
1 Department of Civil Engineering, BMS Institute of Technology and Management, Yelahanka, Bengaluru 560 064, IN
2 Department of Civil Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad 826 004, IN
1 Department of Civil Engineering, BMS Institute of Technology and Management, Yelahanka, Bengaluru 560 064, IN
2 Department of Civil Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad 826 004, IN
Source
Current Science, Vol 125, No 4 (2023), Pagination: 392-400Abstract
According to the literature, the current understanding of the interference effect on the performance of footings is with respect to surficial footings. In practice, however, the footings are laid below the ground surface. In this study, the interference behaviour of two identical strip and square footings embedded in a cohesionless, homogeneous soil medium was examined by performing 72 laboratory model tests. The sand bed was prepared using rainfall technique and reinforced with a single biaxial geogrid layer. Parameters such as footing shape, embedment depth and the spacing between the footings were altered. Using the observed data, multiple regression analysis established a relationship between interference variables related to load-carrying capacity/settlement footing spacing and embedment depth for unreinforced and reinforced soil medium. The test results show that the embedment depth of ultimate bearing capacity and settlement affects interfering footings more than surficial footings. Strip footings are affected to a greater extent than square footings. The load-carrying capacity of two footings increases due to the enhancement of the zone of interference by 12.2% and 39.6% for the strip and square footings respectively.Keywords
Embedded Footings, Interference, Reinforced Soil, Settlement Characteristics, Ultimate Bearing Capacity.References
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