Please use this identifier to cite or link to this item: http://hdl.handle.net/2080/1950
Title: Geotechnical Investigations and Numerical Modeling Vis-À-Vis Extraction of Pillars by Blasting Gallery Method
Authors: jayanthu, S
Rao, Y V
Issue Date: May-2013
Citation: INDOROCK 2013: Fourth Indian Rock Conference 29 – 31 May 2013, Solan HP
Abstract: This paper presents various sensors/instruments useful for understanding stability of workings in underground mines with specific reference to the geotechnical investigations in typical coal mines of Southern India. Convergence indicators, load cells, auto warning electronic extensometers etc were installed in different Levels in the working panel. Maximum load on support, and convergence of workings up to January 2012 in the BG panel are 9.7 Tons, and 51 mm, respectively. Finite difference code - FLAC (Fast Lagrangian Analysis of Continua) was used for simulation of the strata behaviour at different stages of extraction of a thick seam. Numerical modeling results indicated absolute roof deformation of about 6 mm in development gallery. Simulation results for extraction of five stooks representing the condition of main fall indicated roof deformation of 55 mm in the gallery, whereas 51 mm convergence was measured in the field. In view of loss of coal in this type of thick seam mining, it is also suggested to formulate guidelines for designing innovative methods of thick seam mining with meticulous evaluation of performance of BG method through a technical committee involving experts from industry, research, academic and regulatory agencies.
Description: Copyright belongs to proceeding publisher
URI: http://hdl.handle.net/2080/1950
Appears in Collections:Conference Papers

Files in This Item:
File Description SizeFormat 
123.pdf380.35 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.