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Raina, A.K.
- Selection Methodology for Roadheader and Tunnel Boring Machine in Different Geological Conditions: National Perspective Plan Project (Cpri) – A Success Story
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Authors
A.K. RAINA
1,
VMSR MURTHY
2
Affiliations
1 CSIR-Central Institute of Mining and Fuel Research, Nagpur Research Center, 17/C Telangkhedi area, Civil Lines, Nagpur 440 001, IN
2 Department of Mining Engineering, Indian Institute of Technology(Indian School of Mines), Dhanbad 826004, IN
1 CSIR-Central Institute of Mining and Fuel Research, Nagpur Research Center, 17/C Telangkhedi area, Civil Lines, Nagpur 440 001, IN
2 Department of Mining Engineering, Indian Institute of Technology(Indian School of Mines), Dhanbad 826004, IN
Source
Journal of Mines, Metals and Fuels, Vol 69, No 9 (2021), Pagination: 301 - 309Abstract
A national perspective plan project was completed recently which reports the development of a selection methodology for roadheader and tunnel boring machines, the two principal technologies in tunnelling. This involved comprehensive studies at five major tunnelling projects in India where roadheader or tunnel boring machines were deployed. The data on performance of the machines was collected along with the intact rock and rockmass properties. Samples were tested for various specialised laboratory properties. Secondary data was also used in one of the cases. Various models of field penetration index, static and dynamic rock boreability index, and penetration rate were developed for roadheader and tunnel boring machines involving laboratory and field data including dynamic properties. The models were used to define the selection methodology of the machines in various rock formations. In addition to the above, major national rock cutting testing facilities, namely, linear cutting, brittleness and tool wear properties of rock/cutting tools, was developed that can prove to be of great help in defining rock properties vis-a- vis the selection method for forthcoming projects. This paper summarizes the achievements of the research conducted and facilities developed.
Keywords
Roadheader, tunnel boring machine, penetration rate, field penetration index, index of rock boreability.
References
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- Bibliography
- Pandey, P.K., Raina, A.K., Deshmukh, S., Trivedi, R., Vajre, R. and Murthy, V.M.S.R., (2020): Influence of geology on tunnel boring machine performance: A review. Journal of Mining and Metallurgy A: Mining, 56(1), pp.1-14.
- Deshmukh, S., Raina, A.K., Vajre, R. Trivedi, R. and Murthy, VMSR, (2020): Mechanical Impact of a Roadheader, Recent Practices and Advancement in Mineral Industry, (Proc. RPAMI), 21-22 Feb. 2020, VNIT, Nagpur: 159-165.
- Deshmukh, S. Raina, A.K., Murthy, V.M.S.R., Trivedi, R. Vajre, R. (2020): Roadheader – A comprehensive review, Tunnelling and Underground Space Technology, 95, https://doi.org/10.1016/j.tust. 2019.103148
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- The Impact of High Temperature on Compressive Strength and Density of Two Types of Granites From India
Abstract Views :64 |
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Authors
Affiliations
1 Department of Mechanical Engineering, Bankura Unnayani Institute of Engineering, Bankura 722146, IN
2 CSIRCentral Institute of Mining and Fuel Research, Nagpur Research Centre (Mining Technology), 17/C Telangkhedi Area, Civil line, Nagpur, Maharashtra 440001, IN
3 Department of Mechanical Engineering, Indian Institute Technology (Indian School of Mines), Dhanbad, Jharkhand, 826001, IN
1 Department of Mechanical Engineering, Bankura Unnayani Institute of Engineering, Bankura 722146, IN
2 CSIRCentral Institute of Mining and Fuel Research, Nagpur Research Centre (Mining Technology), 17/C Telangkhedi Area, Civil line, Nagpur, Maharashtra 440001, IN
3 Department of Mechanical Engineering, Indian Institute Technology (Indian School of Mines), Dhanbad, Jharkhand, 826001, IN
Source
Journal of Mines, Metals and Fuels, Vol 70, No 3 (2022), Pagination: 141-149Abstract
Physical properties of rocks have significant engineering value. Compressive strength and density of rocks are used in many rock mechanics related studies pertaining to civil and mining activities, stability of the excavations and estimation of the support required. In addition, rocks like granite are used as a building material and are encountered in many civil and infrastructure projects. However, these properties vary with increase or decrease in their temperature. A host of data exists on heat treatment of different rocks. In order to augment such studies and to further the know-how in this discipline, a comprehensive analysis of 56 samples of two types of granites from India was taken up in this study. The tests for compressive strength and density with increase in temperature from 35°C to 600°C were devised and conducted. The results revealed that the behaviour of two groups of the granite varied in a noticeable range on a linear scale. A reduction of 45% to 49% in strength from room temperature to 600°C in the two types of granites points to the loss of strength with increasing temperature. A reduction of 4.3% to 6.3% in density of the samples on heating can be considered to be mild. The rearrangement of grains, loss of water content initially and increase in volume on further heating are considered to be the major reasons for reduction of such physical properties in a linear manner. Colour changes have also observed in the heating process which needs to be explained in future.Keywords
Granite, heat treatment, compressive strength, density.References
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