HINDCO CONSULTING SERVICES Interview Questions, Process, and Tips

Mining is the process of extracting valuable minerals or other geological materials from the earth.

• Mining involves digging, drilling, and blasting to access ores or minerals.

• It can be done underground or in open pits.

• Various methods are used such as surface mining, underground mining, and placer mining.

• Examples include coal mining, gold mining, and diamond mining.

There are two main types of explosives: high explosives and low explosives.

• High explosives: detonate with a supersonic shock wave, examples include TNT, C-4, and RDX

• Low explosives: deflagrate at a subsonic speed, examples include black powder and smokeless powder

VOD stands for Vertical Opening Distance, which is a measurement used in mining engineering.

• VOD is the vertical distance between two levels in a mine.

• It is an important factor in determining the efficiency of ventilation systems in underground mines.

• VOD can impact the safety and productivity of mining operations.

• Example: A mining engineer must calculate the VOD to ensure proper airflow and ventilation in the mine.

• Examp...read more

Solid blasting is a method used in mining to break up solid rock using explosives.

• Solid blasting involves drilling holes into the rock, filling them with explosives, and detonating them to break up the rock.

• It is commonly used in mining operations to extract minerals and ores from the earth.

• The size and placement of the blast holes, as well as the type and amount of explosives used, are carefully calculated to ensure s...read more

ANFO (Ammonium Nitrate Fuel Oil) is commonly used in solid blasting due to its stability and effectiveness.

• ANFO (Ammonium Nitrate Fuel Oil) is a commonly used explosive in solid blasting operations.

• It is a mixture of ammonium nitrate and fuel oil, providing a stable and powerful explosive.

• ANFO is preferred for its cost-effectiveness and ease of handling in mining and construction industries.