50:47

Support System in Underground Mines ||

3:47:36

Most Important 150+ MCQs based on Explosives & Blasting/For all Competitive Exam| by Devendra Sir

48:11

Dump Failure || Bench Failure || Drainage System || Surface Mining Technology Advance

15:23

All Blasting accessories used in opencast mines | oc explosive | nonel | Ed | petn booster emulsion

12:37

India, Coal Mines Everywhere

15:58

Opencast MCQ Final Part || WCL Mining Sirdar MCQ ||

36:03

Asia’s biggest open cast coal mine tour | Coal mining process | Gevra, SECL coal mine Chhattisgarh

11:51

Inspection of sump