Stability Analysis of Underground Developed Pillars of Opencast Mine Using Three-Dimensional Finite Element Method Authored
Authors
-
Indian Institute of Technology (Indian School of Mines), Dhanbad – 826004, Jharkhand ,IN
Gopal Rajak -
Indian Institute of Technology, Kharagpur – 721302, West Bengal ,INSreenivasa Rao Islavath
-
Indian Institute of Technology (Indian School of Mines), Dhanbad – 826004, Jharkhand ,INHemant Kumar
DOI:
https://doi.org/10.18311/jmmf/2022/30800Keywords:
Developed Pillars, Finite Element Model, Displacement, Stress, Safety Factor.Abstract
The major coal producing companies of the India are running most of the opencast mines to excavate the underground developed pillars as the underground mines possess various strata control issues, subsidence, ensures low production and makes losses. During extraction of such developed pillars, the men and machineries may trap in the developed galleries. Hence, the conditions of the pillars and galleries need to be assessed before approaching the developed pillars. In this study, a case study of Jharia Coal field is chosen for detailed stability analysis of the workings. For this, 3D numerical modelling technique is applied to assess the condition of the underground pillars and galleries. From the study, it is observed that the pillars and galleries of the workings for a maximum of 15 m from the slope surface fails severely. It is therefore, these area requires special precautions while approaching the developed coal seam/workings.
Downloads
Metrics
Downloads
Published
How to Cite
Issue
Section
References
Dhawan, K.R., Muralidhar, B., & Edlabadkar, J.S. (2015). Assessment of mine slope stability attalabira - 1 coal mine, Odisha, 550th Indian Geotechnical Conference, 2015 Dec 17–19, Pune, Maharastra, India, 1-10.
Chandarana, U.P., Momayez, M., & Taylor, K.W. (2016). Monitoring and predicting slope instability: A review of current practices from a mining perspective, International Journal of Research in Engineering and Technology, 5(11), 9–151. https://doi.org/10.15623/ijret.2016.0511026 DOI: https://doi.org/10.15623/ijret.2016.0511026
Satyanarayana, I., Budi, G., & Murmu, S. (2021). Stability analysis of a deep highwall slope using numerical modelling and statistical approach — A case study, Arabian Journal of Geosciences, 14(179),1-12. https://doi.org/10.1007/s12517-021-06476-x DOI: https://doi.org/10.1007/s12517-021-06476-x
Panigrahi, D., Sinha, S.K., & Singh, G.N. (2013). A study into occurrence of fire in opencast workings over developed coal pillars and evolving control parameters for its safe extraction, Archives of Mining Sciences, 58(4), 1145–1162. https://doi.org/10.2478/amsc-2013-0078 DOI: https://doi.org/10.2478/amsc-2013-0078
Ngwenyama, P. L., & de Graaf, W. W. (2021). Risks and challenges affecting opencast pillar mining in previously mined underground bord and pillar workings, Journal of the Southern African Institute of Mining and Metallurgy, 121(12), 623-633. https://doi.org/10.17159/2411-9717/1675/2021 DOI: https://doi.org/10.17159/2411-9717/1675/2021
Roy, P.P., Sawmliana, C., Prakash, & Singh, R.K. (2020). Safe exploitation of developed pillars of a coal seam above fire affected areas – A case study, Mining Technology, 129(4), 206-216. https://doi.org/10.1080/25726668.2020.1834972 DOI: https://doi.org/10.1080/25726668.2020.1834972
Islavath, S.R., Deb Debasis, D. (2018). Stability analysis of underground stope pillars using three-dimensional numerical modelling techniques, International Journal of Mining and Mineral Engineering, 9(3), 198–215. https://doi.org/10.1504/IJMME.2018.096103 DOI: https://doi.org/10.1504/IJMME.2018.10017386
Laybourne, R.A., & Watts, R. (1990). The development and application of strip mining to previously mined under-ground coal workings, Journal of the South African Institute of Mining and Metallurgy, 90(8), 187–197.
