NDLI: Environmentally sustainable mining through proper selection of explosives in blasting operation

Content Provider	Springer Nature Link
Author	Khademian, Amir Bagherpour, Raheb
Copyright Year	2017
Abstract	Blasting is considered as the first step in the mineral supply chain in most of the mines. In addition to rock fragmentation, blasting has a significant role in exerting inner damage and reducing the strength of rock fragments. The strength reduction facilitates many of downstream mining processes including comminution and reduces energy consumption in crushing and grinding stages, which is an important achievement in today’s environment. This study aims to investigate the effect of changing the explosive type on post-blast strength of rock fragments and their microcracks content and energy consumption in subsequent processes. For this purpose, several experimental blastings have been carried out using three types of explosives, ANFO, Emulite and pentolite, while the applied energy and other parameter were kept constant. Then, the P-wave velocity and point load index of rock fragments have been measured for all blasts. In the next step, microcrack density of rock fragments was measured by image processing of fluorescent microscopic images and also the quantity of all kinds of microcracks was examined by some light microscopy techniques. The results showed that rock fragments strength is totally influenced by explosive types, so that blasting with pentolite causes a 16.5% reduction in rock strength. Besides, it was found that the rock fragments strength is highly correlated with explosives detonation velocity (VOD). Furthermore, microcracks studies results showed that different types of explosive have dissimilar influences on rock microcrack network, so that the use of pentolite instead of ANFO increases the microcracks density more than 300%.
Starting Page	1
Ending Page	11
Page Count	11
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	76
Issue Number	4
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2017-02-17
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Explosives Rock fragments Microcrack Strength VOD Geology Hydrology/Water Resources Geochemistry Environmental Science and Engineering Terrestrial Pollution Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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