Singh, Rajendra and Singh, Arun Kumar and Ram, Sahendra (2016) Rib/snook design in mechanised depillaring of rectangular/square pillars. International Journal of Rock Mechanics and Mining Sciences , 84. pp. 119-129. ISSN 1365-1609

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A field study at different mechanized depillaring( MD) operations in Indian coalfields (with depth ran- ging from 60–377 m and caveability Index variation from 2300–10500) found mixed performances of adopted sizes of the ribs/snooks. Formation of an irregular shaped rib/snook during MD of the existing square/rectangular pillars by a continuous miner and uniqueness of the existing geo-mining conditions also limit scope of application of the conventional rib/snook design approaches. Taking guidance from the field studies, a parametric investigation is conducted in laboratory on the calibrated simulated models using FLAC3D. An analysis of stress redistribution for different stages of the MD in simulated models provided a different characteristic of an irregular shaped ribs/snooks failure. Presence of mod- erate roof strata is found to be, relatively, more significant for the rib/snook design. Based on the si- mulation results, an attempt is made to provide a model for the rib/snook design in MD.

Item Type: Article
Uncontrolled Keywords: Rib/snook Depillaring Continuous miner Area based design Simulation
Subjects: Thick Seam Mining
Depositing User: Mr. B. R. Panduranga
Date Deposited: 24 Nov 2016 09:51
Last Modified: 24 Nov 2016 09:51

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