Roof Bolts in Mines – DGMS Standards, Composition, Properties, Testing & MCQs Roof Bolts in Mines – DGMS Standards, Composition, Properties, Testing & MCQs 🧾 DETAILED NOTES 1️⃣ Introduction Roof bolts are the primary support system used in underground coal and metal mines for strata control, reinfo...
Telemonitoring Systems in Underground Coal Mines – DGMS Features, Sensors, Communication & MCQs Telemonitoring Systems in Underground Coal Mines – DGMS Requirements, Features & MCQs 🧾 DETAILED NOTES 1️⃣ Introduction A Local Methane Detector (LMD) is an intrinsically safe gas measuring instrument us...
Local Methane Detectors in Underground Coal Mines – DGMS Guidelines, Use, Care & MCQs Local Methane Detectors in Underground Coal Mines – DGMS Guidelines, Use, Care & MCQs 🧾 DETAILED NOTES 1️⃣ Introduction Methane (CH₄) is a highly explosive gas released from coal seams. Its early detection is cruc...