What is da mite?

Dā-mite® is an alternative to explosives and breakers in sensitive areas where “no-blast” conditions and complications from vibration, noise and flyrock is a concern or prohibited.

What are the methods available for breaking rock without using explosives?

Expansive chemical agents are nonexplosive agents that offer many advantages when used in mining and civil projects for rock breakage. Compared to conventional explosives, they are much safer, producing lower levels of noise, vibrations, and flyrock.

Why are blasting holes plugged at the top?

Stemming plugs are placed in the stemming zone of the blast hole to increase the containment of the explosive gasses. The resultant increase in explosive energy is transmitted to the rock mass and is utilized to fragment the rock more efficiently.

What is rock breaking?

Rock-breaking means the removal of boulders or bedrock from land by drilling, blasting, percussive breaking or splitting.

What is used to break rocks?

Use a small hammer to lightly tap on the top of the chisel to make sure that it’s firmly implanted in the rock. Hammer on the chisels to break the rock. Depending on the size of the rock, use a hammer or sledgehammer to hammer in the chisels into their respective holes, alternating between them on each swing.

What is stemming in rock blasting?

Stemming is normally a rock or sand material that is generally placed on top of the explosive in a blasthole. Many blasters use stemming, as it can reduce the air overpressure levels from a blast by more than 98 percent when properly contained.

What is used in breaking rocks?

Thus at these regions, rock breaking is frequently performed by use of explosive agents with traditional methods of blasting such as dynamite and non-explosive demolition agents such as expansive chemical materials, rock cracker, CARDOX and rarely hydraulic hammer.

What is the Subdrilling?

Subdrilling is the process of drilling below the desired floor in blasting in order to form a smooth floor at correct level. If your subdrill is not low enough the floor may be uneven, or leave a large toe. If your subdrill is to large then you lose valuable time and money with extra drilling and extra loading.

What is a good powder factor?

Powder Factor = Tons of rock (or cubic yards) per pounds of explosive. Normal range = 4 to 7. Shallow holes = 1 to 2.