What is the pillar method?

It is a mining system in which the mined material is extracted across a horizontal plane, creating horizontal arrays of rooms and pillars. To do this, “rooms” of ore are dug out while “pillars” of untouched material are left to support the roof overburden.

What is stope and pillar mining?

Also called stope and pillar mining, room and pillar mining involves mining stopes to gain access to mining the ore. Loaders and haulers transport loose rock out of the mine. Stopes are cut into the ore body, leaving pillars in place to support the roof of the mine.

What is pillar and stall?

pillar and stall (bord and pillar, room and pillar; in Scotland: stoop and room) Method of mining in which large chambers are excavated, leaving pillars of ore, rock, or coal to support the roof.

What is sublevel stoping?

Sublevel stoping is a mining method in which ore is blasted from different levels of elevation but is removed from one level at the bottom of the mine. Before mining begins, an ore pass is usually drilled from a lower to a higher elevation.

What is bord and pillar method?

Definition of bord-and-pillar : of or relating to a system of coal mining in which tunnels are driven in a checkerboard pattern having massive square pillars between them which are gradually cut away as the work proceeds.

What is room and pillar method?

Room and Pillar (R & P):means a method in which a set of rooms is developed, leaving pillars rock, usually of uniform size to support the roof. The pillars may. or may not be removed after the removal of the ore.

What means stope?

Definition of stope : a usually steplike excavation underground for the removal of ore that is formed as the ore is mined in successive layers.

What is stooping in mining?

‘Pillar and Stoop’ was the term generally used in Scotland for this old method of mining in which only part of the coal is extracted and pillars of coal are left untouched to support the roof of the seam. It is also known by other names such as room and pillar, board and pillar, pillar and stall, stoop and room.

What is coal pillar?

Current coal pillar design is the epitome of suspension design. A defined weight of unstable overburden material is estimated, and the dimensions of the pillars left behind are based on holding up that material to a prescribed factor of safety. In principle, this is no different to early roadway roof support design.

What is blasthole stoping?

When the dip of a deposit is steep (greater than about 55°), ore and waste strong, ore boundaries regular, and the deposit relatively thick, a system called blasthole stoping is used. A drift is driven along the bottom of the ore body, and this is eventually enlarged into the shape of a trough.

What is a Winze in mining?

A winze is a minor connection between different levels in a mine. When worked upwards from a lower level it is usually called a raise; when sunk downward from a higher level it may be called a sump. The top of a winze is located underground and it is not equipped with winding gear.