Underground coal Mining — Winter 2018

What do you mean by stratified deposit? Write in brief.

What is stowing and write its merits and demerits.

Explain: Origin of coal and theories of it. :

Write down the advantages and disadvantages of longwall mining methods.

Describe bord and pillar method with its advantages and disadvantages.

Write the factors influencing on choice of mining methods.

Give a classification of underground coal mining with its brief discussions of each.

Explain: size of pillar

Write down the restrictions on development of mine.

Explain the development of bord and pillar working using continuous miner and coal cutting machine.

Explain: size of panels

Explain: Working of Continguous seams.

Write down the principles of pillar extraction techniques with its problems.

Explain: Variants of longwall face layouts.

Explain: Length of longwall face.

Which are the influenced factors for layout of longwall faces?

Explain: Direction of face advance.

Classification of Modern longwall faces.

Elements of longwall face.

Explain: Principle of stowing.

Describe: Hand packing stowing method.

Describe a hydraulic stowing with its applicability and preparatory arrangement via brief discussion.

Explain: Hydraulic Profile

Explain: Rate of stowing

Draw a neat sketch of general arrangement of a sand stowing with its brief discussion.