Estimation of Rock Load in Development Workings of Underground Coal Mines – A Modified RMR Approach

2018 ◽  
Vol 114 (10) ◽  
pp. 2167 ◽  
Author(s):  
Avinash Paul ◽  
Vemavarapu Mallika Sita Ramachandra Murthy ◽  
Amar Prakash ◽  
Ajoy Kumar Singh
Keyword(s):  
Coal Mines ◽  
Underground Coal Mines ◽  
Rock Load

Rock Load Estimation in Development Galleries and Junctions for Underground Coal Mines: A CMRI-ISM Rock Mass Rating Approach

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Avinash Paul ◽  
V. M. S. R. Murthy ◽  
Ajoy Kumar Singh
Keyword(s):  
Rock Mass ◽  
Support System ◽  
Coal Mines ◽  
Design Guidelines ◽  
Rock Mass Rating ◽  
Indian School ◽  
Indian Coal ◽  
Underground Coal Mines ◽  
Rock Load ◽  
Roof Rocks

Rock mass rating (RMR) plays important role in design and selection of support system (Ghosh, 2000). For stability assessment of rock mass it is very important to know the amount of rock load mobilized around the development gallery which is estimated using RMR (Singh et al., 2003, Barton et al., 1974, Bieniawski, 1984, and Ghosh et al., 1992). In Indian coal mines, Central Mining Research Institute-Indian School of Mines rock mass rating (herein after referred to as CMRI-ISM RMR) is mostly used for formulating design guidelines for supports. In this paper an attempt has been made to correlate CMRI-ISM RMR values and rock load of galleries and junctions for different gallery widths, ranging from 3.6 m to 4.8 m, at different densities of roof rocks. The proposed empirical expression can help in quick design of support system for underground coal mines working in the same regime.

A new simple methodology for evaluation of explosion risk in underground coal mines

2013 ◽  
Vol 26 (6) ◽  
pp. 1524-1529 ◽  
Author(s):  
Ljiljana Medic Pejic ◽  
Javier García Torrent ◽  
Enrique Querol ◽  
Kazimierz Lebecki
Keyword(s):  
Coal Mines ◽  
Underground Coal Mines ◽  
Explosion Risk
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