Room And Pillar

Room and pillar is an underground mining method that has applications to a wide variety of hard rock deposits worldwide.

Room and pillar.

When the distance between connecting drifts is the same as that between the parallel drifts then a. Room and pillar variant of breast stoping is a mining system in which the mined material is extracted across a horizontal plane creating horizontal arrays of rooms and pillars. Other articles where room and pillar mining is discussed. Room and pillar is a common mining method mining ore bodies with a dip less than 50 degrees.

It is commonly classified as an open stoping method meaning that development involves mining out underground cavities while leaving the surrounding un mined waste or ore as primary support. In the first pillars of untouched material are left to support the roof overburden and open areas or rooms are extracted underground. Room and pillar mining is suitable for tabular bodies of room height but leaves about 40 of the rock in place while exploiting the other half. There are different variations of the method depending on rock.

In this system a series of parallel drifts are driven with connections made between these drifts at regular intervals. This procedure is an inefficient method of resource development but is nevertheless economically suitable for tabular seams particularly if the seams are narrow.