Directional Controlled Blasting for Extraction of Composite Strata in An Indian Coal Mine
IR@CIMFR: CSIR-Central Institute of Mining and Fuel Research, Dhanbad
View Archive Info| Field | Value | |
| Title |
Directional Controlled Blasting for Extraction of Composite Strata
in An Indian Coal Mine
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| Creator |
Himanshu, Vivek K
Roy, M.P. Kaushik, Amar P Kushwaha, Saurabh |
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| Subject |
Blasting
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| Description |
Extraction of thin coal seam and associated overburden using drilling and blasting is a cost expansive task. In such scenario,
the separate excavation of each stratum needs blasting of shallow deep holes. The shallow deep hole blasting comes with many
associated safety and productivity threats such as – flyrock ejection, frequent marching of machinery, extra manpower effort etc. The
simultaneous excavation of thin strata with overburden can be an alternative to this problem. However, simultaneous excavation may
lead to the problems of dilution. Accordingly, a directional controlled blasting is a need to restrict the throw of the blasted material
from each stratum within the desired distance. This paper has dealt with the methodology to excavate two numbers of coal seams
with two layers of associated overburden simultaneously. The scientific methodology consisting of near field vibration assessment and empirical formulation based approach was used to design the blast. The optimal burden and charge factor estimation were
carried out for different strata using this approach. The charging quantification and delay sequence arrangements were designed to suit the requirements of material movements. The blast for the excavation of composite strata was conducted using the devised blasting patterns. The blasting outputs were excellent in terms of the throw of the blasted materials and fragmentation.
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| Date |
2020-07-20
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| Type |
Article
PeerReviewed |
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| Identifier |
Himanshu, Vivek K and Roy, M.P. and Kaushik, Amar P and Kushwaha, Saurabh (2020) Directional Controlled Blasting for Extraction of Composite Strata in An Indian Coal Mine. Journal of Mining Technologies and Mineralogy, 1 (1).
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| Relation |
http://cimfr.csircentral.net/2545/
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