NDLI: Characterisation of overburden dump materials: a case study from the Wardha valley coal field

Content Provider	Springer Nature Link
Author	Koner, Radhakanta Chakravarty, Debashish
Copyright Year	2015
Abstract	Recently, large-scale opencast mining activities in India have led not only to the increased generation of large volumes of overburden (OB) dump materials, but also to the transportation of huge volumes of loose geo-materials from coal faces to areas specifically designated for storing these materials in the form of external or internal dumps. The preparation of large-sized dumps is becoming a challenging task for the mining administration from two important perspectives, namely the limited availability of surface leasehold land for dumping geo-materials, and the associated problems of managing the increasing heights of these geo-structures. Normally, the assessment of stability, and taking proper steps to stabilise these external OB dumps, is a trivial task, but because of the increased risks involved with geo-hazards, the design and monitoring of such dumps is currently becoming critical for the production/operation of any mining organisation. Thus, a knowledge and awareness of the detailed nature and mechanical properties of the selected geo-materials present at these sites is becoming more important for stability assessment of OB dumps. In this study, the collected geo-materials (which are agglomerates of broken rocks and loose soil) were tested to evaluate their geotechnical parameters such as grain size distribution, soil permeability, compaction parameters, shear and normal strength characteristics, etc. These tests show that testing of geo-materials from one site is not sufficient for complete and proper site characterisation that would allow these values to be used subsequently in numerical modelling to quantify the stability of OB dumps. Therefor, it was decided that a geotechnical database for groups of geo-materials needs to be generated for the complete evaluation of OB dump stability for all mine sites in the areas of interest.
Starting Page	1311
Ending Page	1323
Page Count	13
File Format	PDF
ISSN	14359529
Journal	Bulletin of the International Association of Engineering Geology - Bulletin de l'Association Internationale de Géologie de l'Ingénieur
Volume Number	75
Issue Number	3
e-ISSN	14359537
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-12-14
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Overburden dump material Grain size distribution Atterberg limit Shear strength Hydraulic conductivity Geotechnical Engineering & Applied Earth Sciences Geoengineering, Foundations, Hydraulics Geoecology/Natural Processes Nature Conservation
Content Type	Text
Resource Type	Article
Subject	Geology Geotechnical Engineering and Engineering Geology

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