line of extraction Process of Depillaring in underground coal mines- B & P method of mining PART - 1

This video is created by me and PPT is created by me on the topic line of extraction which comes in process of Depillaring in underground coal mines of board and pillar method of mining or working
In this video The subtopics which are covered are :
🔸what is line of extraction?
🔸 what are the different names of line of extraction ?
🔸what are the different types of line of extraction ?
🔸what is difference between step diagonal and steep diagonal line of extraction?
🔸 what is straight line of extraction and what are the its types?
🔸what is diagonal line of extraction
This is Part 1
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In next part 2 The Topics which are covered are given below 👇
🔸V line of extraction
🔸Manner of Extraction goaf line moving rise
to dip At 60⁰ angle from level
🔸factors influencing choice of pillar
extraction techniques
🔸 examples of pillar extraction techniques
🔸 principle of designing pillar extraction technique
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