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Underground coal mine by Indian minerology

147 ratings | 11406 views
Underground coal mine :- Most coal seams are too deep underground for opencast mining and require underground mining, a method that currently accounts for about 60 percent of world coal production.[5] In deep mining, the room and pillar or bord and pillar method progresses along the seam, while pillars and timber are left standing to support the mine roof. Once room and pillar mines have been developed to a stopping point (limited by geology, ventilation, or economics), a supplementary version of room and pillar mining, termed second mining or retreat mining, is commonly started. Miners remove the coal in the pillars, thereby recovering as much coal from the coal seam as possible. A work area involved in pillar extraction is called a pillar section. Modern pillar sections use remote-controlled equipment, including large hydraulic mobile roof-supports, which can prevent cave-ins until the miners and their equipment have left a work area. The mobile roof supports are similar to a large dining-room table, but with hydraulic jacks for legs. After the large pillars of coal have been mined away, the mobile roof support's legs shorten and it is withdrawn to a safe area. The mine roof typically collapses once the mobile roof supports leave an area.
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Text Comments (15)
Vikas Prasad (3 months ago)
Ye mine kha pe hai ??
pin man (7 months ago)
Good top
Indian Minerology (7 months ago)
Thank you
all in one (8 months ago)
Nice video
Indian Minerology (7 months ago)
Thank you
A m (9 months ago)
Bahoot accha video hai...plz or baniye aesa videos👌👌
Indian Minerology (7 months ago)
Thank you
Kumar Pratap (10 months ago)
Bakwaas video
Vikas Prasad (3 months ago)
Bhai tu jaroor mining nhi karta hoga ..
Ayush Tiwari (1 year ago)
Which mine?
deepak kumar jogi (1 year ago)
yes bro
Devil prabhakar (1 year ago)
Bhai regine capsule nahi ...(resin) capsule hota h...watery strata mai use hota h ye.
Vikas Prasad (3 months ago)
Resin capsule wha use hota h jaha strata loose rhta h sa compate to other
akash vishwakarma (11 months ago)
Right
Nitesh Kushwaha (1 year ago)
Devil prabhakar right .

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