In 1994 to 1995, MSV Resources mined 118,356 tonnes grading 10.58 g/t Au and 0.3% Cu by room and pillar mining
. The mineralization was processed at the Copper Rand Mine in Chibougamau and 40,000 oz of Au was recovered.
These findings mainly focus on roadway driving along the gob, room and pillar mining
, roof movement during depillaring and other areas (Cheng et al., 2010; Jayanthu et al., 2004; Sherizadeh and Kulatilake, 2016; Wang et al., 2013).
Plus, the simple geometry of the room and pillar mining
method facilitates the stress estimation of pillars even further.
By contrast, the support strength is gradually enhanced due to the mine's main support structure and the support of cemented backfill during the pillar mining
Jin, "Ground pressure and overlying strata structure for a repeated mining face of residual coal after room and pillar mining
," International Journal of Mining Science and Technology, vol.
Based on the production and geological conditions of Working face 4104, the morphological development of mining-induced fissures under the condition of coal pillar mining
and mining with narrow coal pillar are analyzed.
Isolated coal pillar mining
is one of the typical engineering situations with strain-type rockburst (see Figure 8).
Conventional room and pillar mining
will be used, whereby the mined material will be extracted across a horizontal plane.
Unlike conventional room and pillar mining
, where coal columns are left behind to support the earth's surface above, longwall mining completely removes the coal from the area being mined.
The scheme would involve extracting about 200,000 tonnes of coal a year by the board and pillar mining
The gypsum mine is mainly exploited with room and pillar mining
. As the consequence of constant mining, a large amount of goaf appears, which poses potential threats to the safety of mining production and the life of residents nearby.
Affected by room and pillar mining
and small coal pit mining at the early stage and due to the requirement to protect the adjacent working face, a large amount of coal pillars were setup in the gobs of coal strata.