UNDERGROUND BLASTING

Course Fee : USD 100

Course Fee : USD 13

  • Course Duration : 1 Hour
  • Validity : 60 Days

Description

Blasting is the process of breaking of  bulk rock masses  into loose forms,  using  explosive compounds.  Here, the primary role is  played by the explosives.   The explosives  are  the substances or devices used in blasting. The explosives are used to produce  a volume of rapidly expanding gas that exerts sudden pressure on its surroundings and break the mass into pieces  But when it comes to underground coal mining, all coal seams are considered gassy and the degree of the gas present may vary from I to III. Then only permitted explosive &  approved detonators are to be used.
Concepts of solid off Blasting;-Freedom to Move : In situ Coal needs free passage to move out during blasting, i.e. Free face to be created by Creating wedge opening by drilling and blasting a few additional holes preferably Solid Blasting.

Course Objective

The objective is to reduce the likelihood of getting injury & occupational health problem and to increase the technical knowledge & skill to all associated person engaged for charging &  blasting operation. It is  essential that a blaster have a good knowledge & skill  of blasting process. With this e-module technical aspects related to storage & transportation of the explosive can be learnt.

Course Curriculum

  • Introduction on blasting?.
  • Explosives – Types, Class, Group of permitted explosive used below ground?.
  • Initiating System- Detonators.
  • Transportation of Explosive.
  • Storage of explosive.
  • Shot firing tools.??
  • Method of blasting in belowground mines?
  • Precautions of blasting of solid
  • Dealing Misfire
  • Blasting Card System
  • Duties & responsibilities of shotfirer & Magazine In-charge?
  • Blasting Performance
  • Special precautions in special case
  • Do's & Don’ts of shot firing

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