Basics Techniques Used In Blast Hole Drilling:

Blast hole Drilling is a technique used in mining whereby a hole is drilled into the surface of the rock, packed with explosive material, and detonated. The aim of this technique is to induce cracks in the inner geology of the surrounding rock, in order to facilitate further drilling and associated mining activity.

The initial hole into which the explosives are packed is known as the “blast hole”. Blast hole drilling is one of the primary surface drilling techniques employed in mining operations today.

Where is Blast Hole Drilling Used?

Blast hole drilling is traditionally used wherever the mining company wants to explore the mineral composition or potential mineral yield of the area demarcated for their mining interests.

Basics Techniques Used In Blast Hole Drilling:
Basics Techniques Used In Blast Hole Drilling:

Blast holes are thus a fundamental step in the exploratory mining process, and can be employed in both surface mining operations and underground mining operations to varying degrees with varying effects or results.

Blast hole drilling can also be employed in quarrying endeavors.


Blasting Techniques and Methods Used

Technique 1 – Open mine blasting

Open pit mining refers to mining minerals from, as the name suggests, an open pit; or may refer to any similar shallow mining operation. Open-mine blasting plays a pivotal role in determining the needs of all other mining activities to come, From the loading and unloading, to transport considerations, the initial blasting will affect each and every activity that follows it. 

Therefore, effective blast design is paramount. The correct, or most effective blast design will always maximize fragmentation control and will be developed based on the available data and research.

Technique 2 – Underground blasting

In underground mining, blasting becomes one of the primary methods of rock excavation. Studies are undertaken on everything from the effect of the vibration of the explosion, to the likely impact of the blast on the existing mining structures, prior to the blasting taking place.

As underground blasting is essentially a controlled cave-in, safety is a massive cause for concern, and all calculations and potential outcomes are checked and rechecked.

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