Paul, Avinash and Prakash,, Amar and Singh, Ajoy Kumar and Porathur , John Loui (2023) Modelling of Fragile Coal Mine Roof and Estimation of Rock Loads—Some Empirical and Numerical Methods. Mining, Metallurgy & Exploration.

Full text not available from this repository. (Request a copy)

Abstract

Weak, layered, and fragile rock mass formation, if not supported properly, is subject to roof failure thereby affecting safety and productivity in underground coal mines. Though Central Mining Research Institute – Indian School of Mines Rock Mass Rating (CMRI-ISM RMR) based well-defined support design guidelines are established, still occurrence of roof failures in underground coal mines is a real matter of concern for mining engineers and researchers. Numerical modeling techniques are successfully used by several researchers by simulating rock mass condition for stability assessment of mine openings. The analysis becomes crucial in case of weak and fragile rock formation. The present research envelops the determination of 31 cases of rock load by CMRI-ISM RMR under different geo-mining conditions followed by the development of modified Rock Mass Rating (RMR), i.e., rock mass rating dynamic (RMRdyn) by incorporating P-wave velocity as a new parameter. The rock load determined using RMRdyn and numerical models was correlated and found in close agreement. In addition, the deviation in rock load determined by all the three approaches, i.e., CMRI-ISM RMR, numerical modeling, and RMRdyn, was compared with the actual field data. The percentage deviation obtained in RMRdyn and numerical modeling is less compared to CMRI-ISM RMR

Item Type:	Article
Uncontrolled Keywords:	Rock load Support design Numerical modeling CMRI-ISM RMR RMRdyn
Subjects:	Mine Subsidence
Divisions:	UNSPECIFIED
Depositing User:	Mr. B. R. Panduranga
Date Deposited:	04 Sep 2023 07:11
Last Modified:	04 Sep 2023 07:11
URI:	http://cimfr.csircentral.net/id/eprint/2607

Actions (login required)

View Item