Paul, Avinash and Prakash, Amar and Kumar, Niraj and Kumar, Pramod and Singh, Ashok Kumar (2022) Integration of Numerical and Empirical Approaches for Assessment of Apt Support Design for Various Underground Openings of Chromite Mine. Journal of the Geological Society of India , 98. pp. 851-858. ISSN 0016-7622

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Abstract

The underachievement of support systems in roof bolts layout design is one of the dominant causative factors of roof fall in underground mines. Various factors triggering the roof failure are the presence of laminated roof, the geological plane of weaknesses, the time lag in support installation, inefficient grouting/bonding of roof bolts, improper estimation of roof bolt length, the concentration of the induced stresses due to mining activities, etc. The roof fall concerns mining engineers as it seriously affects safety and productivity. Hence the stability of the openings has to be considered as apriority to suspend the movement of overly in glayered strata by application of adequate support. Application of rock mass classification system helps in guiding suitable roof support design for apt Search Log in stabilization of the mine openings. The study has been carried out to assess the befitting support design of various openings in underground chromite mine considering applicable rock mass classification systems namely Bieniawski’s Geomechanical System and Barton’s Q — system inclusive of numerical analysis. The values of rock load obtained by Bieniawski’s geo mechanical system was on the higher side. Thus, in view of the safety and stability of engineering structures, Bieniawski’s geo mechanical system was considered for the design of a support system. Rock load was determined for different dimensions of under ground openings such as decline, cross-cut junctions, cross-cut roadways, ore drive, footwall drive, and haulage junctions, wherein width variation resulted in influencing rock load. Safety factor has also been analysed with respect to the width of the opening to demarcate stable and semi-stable zones

Item Type:	Article
Subjects:	Geo-Mechanics and Mine Design
Divisions:	UNSPECIFIED
Depositing User:	Mr. B. R. Panduranga
Date Deposited:	13 Jun 2022 08:47
Last Modified:	13 Jun 2022 08:47
URI:	http://cimfr.csircentral.net/id/eprint/2508

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