The business of extracting valuable mineral resources that are deeply embedded in the earth’s crust require technical expertise. Technical expertise that are used in the mining industry for successful displacement of valuable minerals from rocks follow well defined processes. Professional application of all mining processes is a non-negotiable requirement for profitable mineral extraction from rocks. Poor implementation of any of the processes always results in inefficiencies and losses.
Successful dislodging processes require heavy duty machinery and equipment. However, to simplify the work and reduce the cost of mining operations, blasting is used to dislodge minerals from the natural rocks. With a very good understanding of rocks and blasting methods, dislodgement can be effectively implemented.
Having risen to become a routine work in virtually all mining sites, blasting has completely changed the scope of mining operations the world over.
For a company to effectively implement a successful blast, it must comply with the underlisted processes religiously.
Blast Hole Drilling
It is very important for a blast hole to be accurately drilled. To do this, the blast hole design and their locations must be properly determined. Drilling rigs should then be used to drill the holes after which the driller should communicate with the blaster so as to furnish him with any geological conditions of concern that were encountered during the drilling process. This information can guide the blaster in using the most appropriate method in loading the hole with detonators.
Loading Explosives into Blast Holes
After the holes have been drilled and their geological conditions are known to the loader, the next step is to properly load the holes with detonators. Detonators serve as primary tools that are used to break rocks. They have timing periods that are key for effective breakage and prevention of offsite effects.
In loading the holes with detonators, the holes should not be completely filled up. Some amount of space should be left at the top of the hole so that inert materials called stemming can be used to fill it up. The importance of filling the space with the stemming is that it prevents the energy released by the detonation from leaving the confines of the blast hole and ensures that the blast energy is focused horizontally.
Connecting The Explosives
There are three types of detonators used in mining operations. Each has its own unique characteristic that makes it suitable depending on the type of blasting project that needs to be executed.
After blast holes have been loaded with the specific type of detonator suitable for the specific blasting project, they should then be connected together.
Securing the Blast Area
Before detonating the explosives, The blaster should ensure that the defined area where the blasting is going to take place is fully secured and clear. This he does by indicating clearly landmarks where that no person should be. The land marks should be communicated to all workers and where present, a siren warning should be sounded minutes before the explosives will be detonated.
Detonating the Blast
After ensuring that the area is safe and clear, the explosives are detonated. The blast operator should then crosscheck to examine if the detonation yielded the needed result. If this is confirmed, he can then give a final signal for excavation process to begin.
HPE SOLUTIONS FOR BLASTING IN MINES
Blast Hole Dislodger
HPE Blast Hole Dislodger is a special tool designed to ensure that blast holes are perfectly cleaned and cleared of any form of dirt , debris and water so that detonators can be properly loaded into them for effective and efficient blasting operation.
The Blast Hole Dislodger has a lance diameter of 19mm whose length is provided according to requirement (usually 1200mm – 3500mm). The diameter of its nozzle is 22mm and the water flow rate is 0.2 l/sec. The Dislodger is strictly powered by high pressure water only, saving you significant overhead cost on energy.
Emulsion Explosive Mixer
The uniquely designed Emulsion Explosive Mixer is a very strong and efficient explosive loading tool that is designed for effective loading of blast holes with emulsion based explosive mix, so that blasting can be more simple and cost-effective.
Explosive Loading Device
HPE Explosive Loading Device is specially designed to ensure sufficient cleaning and flushing of blast holes by providing sufficient pressure and flow. It has the capacity to ensure that explosives are properly loaded into blast holes.
The Hydro compressor of the Explosive Loading Device supplies compressed air for any of the following; a special anfo loading hopper, an explosive capsule gun or any other tool that requires low pressure compressed air (eg. grout guns).