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 Surface Mining Control and Reclamation Act of 1977 (SMCRA) requires that coal mining be conducted in a manner that prevents injury to people and damage to public or private property during blasting.

To become a certified blaster at a coal mine a person must be trained, gain experience and pass an examination. Here you will find information on the technical and regulatory issues that a blaster must know to have a reasonable expectation of passing the examination.

Oct 13, 2023 · In open pit mining, there are several commonly used blasting methods as follows: Classification according to blasting delay time: simultaneous blasting, microsecond blasting, and millisecond blasting.

Feb 4, 2025 · Blasting is a critical process in mining that breaks down rock formations, enabling efficient material removal. It involves strategically placing explosives within drill holes to fragment rock into manageable sizes for excavation and processing.

Highly-trained and skilled blasters are crucial to ensure safe, efficient and compliant blasts in coal mining operations. Properly trained blasters can design and conduct blasts that use the best available technology, while meeting the regulatory performance standards of SMCRA.

Apr 6, 2021 · Blasting in mining is a chemical and physical process that occurs through the firing of explosives. It breaks mineral-bearing materials. These materials can be coal, ore and mineral stone. Blasting fragments materials, splits off rock blocks, and demolishes existing structures.

Reference blasting fundamentals, properties of explosives and blasting principles in this section. For more specific requirements, reach out to our Orica specialists for an in-depth discussion today. A term commonly applied for mining development and civil tunnelling.

May 14, 2024 · The basics of blasting and requirements explained. All mining operations require blasting at one stage or another. Blast hole drilling is used in mining where a hole is drilled into the surface rock, packed with explosives and detonated.

blasting, process of reducing a solid body, such as rock, to fragments by using an explosive. Conventional blasting operations include (1) drilling holes, (2) placing a charge and detonator in each hole, (3) detonating the charge, and (4) clearing away the broken material.