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Singh, T. N.
- Engineering Geology
Abstract Views :194 |
PDF Views:119
Authors
Affiliations
1 Department of Earth Sciences, IIT Bombay, Mumbai – 400 076, IN
1 Department of Earth Sciences, IIT Bombay, Mumbai – 400 076, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 76, No 2 (2010), Pagination: 189-189Abstract
No Abstract.Full Text
- A Critical Assessment of Geomechanics of Leak Off Test
Abstract Views :284 |
PDF Views:135
Authors
Affiliations
1 Western Offshore Basin, ONGC, Mumbai-400022, Maharashtra, IN
2 Department of Earth Sciences, IIT Bombay, Mumbai-400076, Maharashtra, IN
1 Western Offshore Basin, ONGC, Mumbai-400022, Maharashtra, IN
2 Department of Earth Sciences, IIT Bombay, Mumbai-400076, Maharashtra, IN
Source
International Journal of Earth Sciences and Engineering, Vol 9, No 4 (2016), Pagination: 1393-1396Abstract
A detail Knowledge of insitu stress and formation pore pressure in a basin brings understandings into their configuration as well as its implications for well design and drilling safety. Leak off pressure (LOPs) recorded during leak-off tests (LOTs) accompanied down boreholes are frequently used for the evaluation of magnitude of the minimum stress (usually assumed to be horizontal-σh) in the subsurface. Though, the reliability of these tests has been questioned in the literature as well as in oil and gas industry. Newly acquired extended LOTs provide more reliable estimate of minimum stress as compared to other available methods. But standard LOTs performed in each borehole section and provide huge data set for geologist which can be further used for the estimation of minimum horizontal stress. In present study geomechanical assessment of parameter used for LOT are discussed which specify the relation between LOP and minimum horizontal stress.Keywords
Leak-Off Test, Extended Leak-Off Test, Radial Stress, Hoop’s Stress, Minimum Horizontal Stress, Maximum Horizontal Stress, Lost Circulation.Full Text
- Selection of Lidar technology for limestone quarry in Thailand
Abstract Views :146 |
PDF Views:0
Authors
Affiliations
1 Centre of Tropical Geoengineering, Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, MY
2 Earth Science Department, Indian Institute of Technology, Bombay 400 076, IN
1 Centre of Tropical Geoengineering, Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, MY
2 Earth Science Department, Indian Institute of Technology, Bombay 400 076, IN
Source
Journal of Mines, Metals and Fuels, Vol 65, No 7 (2017), Pagination: 393-399Abstract
Thailand produces construction aggregates from limestone, basalt and granite quarries. In one of limestone quarry, expansion of quarry is planned.With increase in limestone production, optimum blasting performance in terms of fragmentation and gradation is critical. Limestone is identified as weathered, highly weathered and massive limestone based on previous exploration. Based on geological strength index, limestone is classified as blocky, very blocky, blocky/seamy and disintegrated. Further observation is required on geological discontuities for all quarry faces. This paper evaluates technological options of unmanned aerial vehicle (UAV) with photogrammetry and Lidar technology with digital images for recording and storing data of geological discontinuities.Keywords
Geological Strength Index, UAV with Photogrammetry, Lidar Technology with Digital Images.
- Numerical analysis of heat dissipation through granite and clay in the multi-barrier system of a geological disposal facility
Abstract Views :164 |
PDF Views:89
Authors
Affiliations
1 Homi Bhabha National Institute, Mumbai 400 094, IN
2 Indian Institute of Technology (BHU), Varanasi 221 005, IN
3 Indian Institute of Technology Bombay, Mumbai 400 076, IN
1 Homi Bhabha National Institute, Mumbai 400 094, IN
2 Indian Institute of Technology (BHU), Varanasi 221 005, IN
3 Indian Institute of Technology Bombay, Mumbai 400 076, IN
Source
Current Science, Vol 122, No 9 (2022), Pagination: 1089-1093Abstract
High-level heat-emitting long-lived vitrified radioactive waste produced during recycling of the spent nuclear fuel is under consideration for permanent disposal in deep geological formations with appropriate thermomechanical, hydrogeological and geochemical properties. The capability of these rock formations ensuring long-term confinement and isolation of such waste from the environment is significantly controlled by their efficiency in smoothly dissipating the heat emanating from the waste. A number of rock types such as basalt, granite, clay stones, volcanic tuff, argillites, etc. are being evaluated worldwide as well as in India. In this study, a granite from Jalore and bentonite from Barmer, both from Rajasthan, India, have been evaluated for their heat dissipation capacity. The study revealed that the temperature within granite at the centre of the canister reached 55.21°C, resulting in a thermal stress of 25.50 MPa. Bentonite experienced a temperature of 67.42°C in the central part with maximum thermal stress and displacement of 1.78 MPa and 0.446 mm respectively. A displacement of 0.997 mm was recorded at the granite–bentonite interface. Thus, no significant microcrack formation or undesirable displacement was observed within the granite as well as in bentonite, suggesting their capability to isolate and confine the heat-emitting source for extended periods.Keywords
Bentonite, deep geological repository, granite, radioactive waste, thermo-mechanical analysis.Full Text
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