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A platform for research: civil engineering, architecture and urbanism
Ground Supports for Temporary Roadways in Highly Weathered Rock Mass
Underground roadways should be safe for mining operations, which requires a stable support system with respect to challenging rock mass conditions comprising of weathered rock mass of poor category as the installation of conventional supports such as rock bolts may not be possible due to difficulty in creating stable boreholes in weathered rock mass. This paper presents a parametric study involving D-shaped and square cross section roadways of 3 m × 3 m, 4 m × 4 m, and 5 m × 5 m size, shotcrete lining of 50 mm, 100 mm, and 150 mm thickness, M25, M30, and M35 shotcrete grades conforming to civil engineering standards of IS 456:2000 and with varying rock mass properties. The study is conducted using FLAC 3D numerical modelling software to analyse the stability of temporary roadways. The numerical modelling results show the variations in yielding in rock mass and shotcrete lining with respect to change in roadway size and shotcrete lining thickness. The findings from the models explains the optimal shotcrete thickness and grade required for robust roadway support in weathered rock mass. It also explains the impact of roadway size and shape on geotechnical stability of rock mass and shotcrete lining. This paper contributes knowledge to the mining industry in decision making for the design of Systematic Support Rules (SSR) for temporary roadways in weathered rock mass of “poor” category.
Ground Supports for Temporary Roadways in Highly Weathered Rock Mass
Underground roadways should be safe for mining operations, which requires a stable support system with respect to challenging rock mass conditions comprising of weathered rock mass of poor category as the installation of conventional supports such as rock bolts may not be possible due to difficulty in creating stable boreholes in weathered rock mass. This paper presents a parametric study involving D-shaped and square cross section roadways of 3 m × 3 m, 4 m × 4 m, and 5 m × 5 m size, shotcrete lining of 50 mm, 100 mm, and 150 mm thickness, M25, M30, and M35 shotcrete grades conforming to civil engineering standards of IS 456:2000 and with varying rock mass properties. The study is conducted using FLAC 3D numerical modelling software to analyse the stability of temporary roadways. The numerical modelling results show the variations in yielding in rock mass and shotcrete lining with respect to change in roadway size and shotcrete lining thickness. The findings from the models explains the optimal shotcrete thickness and grade required for robust roadway support in weathered rock mass. It also explains the impact of roadway size and shape on geotechnical stability of rock mass and shotcrete lining. This paper contributes knowledge to the mining industry in decision making for the design of Systematic Support Rules (SSR) for temporary roadways in weathered rock mass of “poor” category.
Ground Supports for Temporary Roadways in Highly Weathered Rock Mass
Spri. Proceed. in Earth, Environ. Sci.
Gorai, Amit Kumar (editor) / Ram, Sahendra (editor) / Bishwal, Ram Manohar (editor) / Bhowmik, Santanu (editor) / Pobbu, P. K. (author) / Pavan, S. (author) / Madavi, R. P. (author) / Porathur, J. L. (author) / Jagapthal, V. K. (author)
International Conference on Sustainable and Innovative Mining Practices ; 2023 ; Rourkela, India
2024-11-17
13 pages
Article/Chapter (Book)
Electronic Resource
English
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