Neelachal Ispat Nigam Mines Foreman Interview Questions and Answers

The power pack position for longwall mining face should be strategically located for efficient operation.

• The power pack should be located near the longwall face to minimize the length of hydraulic hoses and electrical cables.

• It should be positioned in a safe and accessible location for maintenance and repair.

• The power pack should be designed to withstand the harsh mining environment, including dust and moisture.

• The lay...read more

Bord and pillar mining percentage of extraction refers to the amount of coal or ore that can be extracted from a given area using this method.

• The percentage of extraction in bord and pillar mining can vary depending on factors such as the size of the pillars left behind, the thickness of the seam being mined, and the equipment used.

• In general, the percentage of extraction for coal using bord and pillar mining ranges fr...read more

Explaining blast output calculation and powder factor calculation.

• Blast output calculation involves determining the amount of material moved during a blast.

• Powder factor calculation involves determining the amount of explosive needed to move a certain amount of material.

• Blast output calculation can be done using the formula: Volume of material moved = hole volume x burden x spacing x number of holes.

• Powder factor calcu...read more