SuperSilent's Space

Sunday, December 29, 2013

Underground Mine Development

Directional Terms

Breast - Advancing in a near - horizontal direction , also the working face of an opening
Inby - Towards the working face , away from the mine entrance
Outby - Away from the working face , towards the entrance
Overhand - Advancing in an upward direction
Underhand - Advancing in downward direction

Excavation Terms

Adit - main horizontal or near - horizontal underground opening , with single access to the surface
Bell - funnel shaped excavation formed at the top of a raise to move bulk material by gravity from a stop to a drawpoint
Bleeder - Exhaust ventilation lateral

Underground Mine Development

Terms

Deposit and Spatial Terms

Back - roof , top , or overlying surface of an underground excavation
Bottom - floor or underlying surface of an underground excavation
Capping - waste material overlying the mineral deposit
Country rock - waste material adjacent to a mineral deposit
Crown pillar - portion of the deposit overlying an excavation and left in place as a pillar
Dip - angle of inclination of a deposit , measure from the horizontal, also pitch or attitude
Floor - Bottom or Underlying surface of an underground excavation
Footwall - wall rock under the deposit
Gob - Broken , caved , and mined out portion of the deposit
Hanging wall - wall rock above the deposit
Pillar - unmined portion of the deposit , providing support to the roof or hanging wall
Rib - Side wall of an excavation , also rib pillar
Roof - back , top , or overlying surface of an excavation
Sill pillar - portion of the deposit underlying an excavation and left in place as pillar
Strike - Horizontal bearing of a tabular deposit as its surface intersection
Wall rock - Country rock boundary adjacent to the deposite