Blast hole drilling is a process that is used to create holes in the ground for the purpose of blasting. This can be done for a variety of reasons, including mining, construction, and demolition. There are a few different methods that can be used for blast hole drilling, each with its own advantages and disadvantages. In this article, we will discuss the different methods of blast hole drilling, as well as the benefits and drawbacks of each.
The first method of blast hole drilling is by suspended diamond wire cutting. This process works by suspending a diamond-coated wire into the ground, where it will cut a round or rectangular shaped pattern in the rock to be blasted. The advantages of this method are that it is fairly quick and can be used for both horizontal and vertical drilling, depending on the depth and shape of the hole. The main drawback of this method, however, is that it can only be used for drilling a limited number of holes before needing to be replaced or rewound.
Another method of blast hole drilling is through percussion drilling. This process works by using a drill bit attached to a cylinder, which is hit to create a hammering force on the rock. These bits can be made of steel or tungsten carbide, depending on the type of rock being drilled. They are also usually hollow in order to facilitate dust removal during drilling and have flutes running down the sides to increase their efficiency at cutting through hard rocks.
The advantages of percussion drilling are that it can be used to drill through harder rocks than rotary drilling and it can also facilitate faster drilling. However, these bits tend to wear out more quickly than rotary bits and require additional time in order to swap them out when one is broken or damaged.
There is also a greater risk of the bit slippage when it is under rotation. This is when the bit slips out of the rock that it is cutting and rotating, potentially causing injury to anyone nearby.
What are the benefits?
One of the key benefits of percussion drilling is that it can be used to cut through harder rock than rotary drilling. This is because the percussion bits tend to have a flatter, more durable surface than rotary bits.
In conclusion, percussion drilling is a useful tool for cutting through hard rocks, and it has certain advantages over rotary drilling. However, there are also some distinct disadvantages that need to be considered before this method can be used effectively.
For more information on Blast Hole Drilling, check online.