Thank u sir for such very good explanation. Every time please discuss topics giving firstly the basic idea , like this video . Hope it will help us , the biginner ,the aspirant of mining in understanding all the read topic as well the new or unknown topic 😊 Love from Durgapur ❤
Sir mujhe samajh aa gya gallery ka width 6m ku hai haldibari coal mine me ku ki waha room and pillar method use hota hai or waha CM ka use Kiya jata hai that's why 😊
Beta yadi kisi bhi chij ka advantages Hai To Uska avashya Hi disadvantages Bhi Hoga hi hoga Ham donon Mein tulna Karte Hain Ki Kaun Hamare liye Jyada tension Rakhta Hai advantage jyada hai to hamare liye Jyada Achcha discount jyada hai to usko Ham kam kar dete hain aur Baki Kuchh Nahin Hai
