Location

New York, New York

Session Start Date

4-13-2004

Session End Date

4-17-2004

Abstract

Jharia Coalfield, in India, is a prime storehouse of the coking coal. It contains as many as thirty contiguous seams. Multiplicity of seams has contributed to a number of problems, fire, inundated workings, goaf out area and disturbed strata condition. However, due to various geotechnical problems, it was not possible to fully extract coal by underground mining method. Opencast mining is now planned for extraction of virgin coal seams upto an ultimate depth of 500 m for ensuring maximum resources recovery. There are various modeling methods to analyze the behaviour of slopes. To achieve the objective for ensuring the safe slopes with steepest possible angle, the prototype of one of the mine was simulated in physical model i.e. Equivalent material model (EM) incorporating all the pertinent characteristics of rock mass, mining method and geological discontinuities properties. The results of EM are corroborated by Numerical method using Computer code FLAC- 2D. It was observed that when slope reached near the bottom seam the resultant vector of various monitoring points showed toppling tendency of slopes whereas high stress concentration was observed in the toe region and decreases towards the surface.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Fifth Conference

Publisher

University of Missouri--Rolla

Publication Date

4-13-2004

Document Version

Final Version

Rights

© 2004 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Geo-Mechanical Modelling for Optimization of Rock Slope in an Opencast Coal Mine

New York, New York

Jharia Coalfield, in India, is a prime storehouse of the coking coal. It contains as many as thirty contiguous seams. Multiplicity of seams has contributed to a number of problems, fire, inundated workings, goaf out area and disturbed strata condition. However, due to various geotechnical problems, it was not possible to fully extract coal by underground mining method. Opencast mining is now planned for extraction of virgin coal seams upto an ultimate depth of 500 m for ensuring maximum resources recovery. There are various modeling methods to analyze the behaviour of slopes. To achieve the objective for ensuring the safe slopes with steepest possible angle, the prototype of one of the mine was simulated in physical model i.e. Equivalent material model (EM) incorporating all the pertinent characteristics of rock mass, mining method and geological discontinuities properties. The results of EM are corroborated by Numerical method using Computer code FLAC- 2D. It was observed that when slope reached near the bottom seam the resultant vector of various monitoring points showed toppling tendency of slopes whereas high stress concentration was observed in the toe region and decreases towards the surface.