- DEC: Decline - INC: Incline - ACC: Access - VD: Vent drive - VRA: Vent rise access - SP: Stock pile - XC: Cross cut - DDH: Diamond drill holes - DDC: Diamond drill cuddy - CMS: Cavity monitoring systems - LHD: Bogger - N, S, E, W: The directions (North, South, East, West) - F/S: Front sight - B/S: Back sight - C/L: Center line - G/L: Grade line - LHW: Left hand wall - RHW: Right hand wall - COD: Change of direction - COG: Change of gradient - EOD: End of design - EOW: End of week - EOM: End of month - R: Production Ring - L: Laser of Production Ring - UG: Underground - ROM: Run of Mine - MRE: Mineral Resource Estimate - O: Ore - W: Waste - LOM: Life of Mine - D&B: Drill and Blast - UGD: Underground Development - RC: Reverse Circulation - PPE: Personal Protective Equipment - HSE: Health, Safety, and Environment - LHOS: Long Hole Open Stoping