What is alternative for blasting?
LASER CLEANING: AN ALTERNATIVE TO SANDBLASTING Using sandblasting for cleaning applications can be effective, but it’s also dangerous, not environmentally friendly, and difficult to clean up. Laser cleaning, on the other hand, provides a safer, less-damaging alternative to sandblasting.
What is blasting excavation?
Drilling and blasting is the controlled use of explosives and other methods such as gas pressure blasting pyrotechnics, to break rock for excavation. It is practiced most often in mining, quarrying and civil engineering such as dam, tunnel or road construction. The result of rock blasting is often known as a rock cut.
Why do most mines use blasting?
Blasting is the most cost effective way to fracture rock. Therefore, blasting reduces the costs of consumer goods such as electricity, sand, gravel, concrete, aluminum, copper and many other products manufactured from mined resources.
What is underwater blasting?
Underwater drilling is the first part of the process during which drilling is done to make bore holes in the rock to place charges or explosives for blasting. The drilling (and blasting) can be done from the surface via floating pontoons and self-elevating, spudded platforms.
How many types of blasting are there?
There are various types of abrasive blasting including, silicon dioxide, soda, steel, bristle, glass bead and much more. All these different abrasive blasting methods usually use a specific type of grit to achieve the desired results, hence the need to determine the correct technique to use.
Which explosive is used in underground mines?
The Director General of Mines Safety has approved Powergel P501 as a P5 type permitted explosive for use in degree I, II and III gassy coal mines/seams. Powergel P501 is a water resistant P5 type of permitted explosive. It can be used for solid blasting in all underground coal mines.
What are the common causes of accidents due to blasting in underground mine?
The accident data were examined to identify trends and primary causes. Over half of the causes of mine blasting accidents were attributed to blast area security, while premature blast, flyrock, and misfires combined represented over 30 percent of the causes.
Which of the following explosive is best for under water blasting?
Two types of explosives are mainly used in underwater drilling and blasting operation, nitroglycerine-based explosives (NG) and ammonium nitrate-based explosives (AN).
How do you break concrete underwater?
Poured into plastic tubing, Dexpan Expansive Grout can break reinforced concrete and rock under water. It works safer and more effective comparing to traditional construction tools and equipment like controlled blasting, hydraulic breaker, and jackhammer.
How do you get rid of underground rocks?
How to Remove Large, Partially Buried Rocks From a Yard
- Dig Along the Sides of the Rock. Dig down around the sides of the rock with a shovel until you reach the bottom of the rock.
- Create a Gradual Slope.
- Use a Smaller Rock as a Fulcrum.
- Roll the Rock to a New Location.
- Break the Rocks.
- Split the Rock into Smaller Pieces.
What psi is needed for sandblasting?
You should use a tank with a minimum of 100 PSI for optimum efficiency with any abrasive sandblasting project. If you work with a lower PSI, you’ll add a significant amount of time to your project.
Can you sandblast concrete?
Sandblasting concrete is an abrasive blasting technique used to blast concrete away to expose the aggregate beneath it for a rough surface finish. In addition, the procedure is also designed to instantly remove dirt, grime, paint or simply for graffiti removal.