Shaft Lining

Shaft lining is an operational activity of constructing support structures along the shaft rock wall to control the formation pressure, maintain the stability of the surrounding rock of the shaft, and prevent deformation, cracking, or water leakage of the shaft. According to the lining material and structure, there are wooden shaft frame, dressed stone, arc shaft wall, concrete, reinforced concrete shaft wall, and rockbolt and shotcrete (bolt-shotcrete). According to the effects of shaft lining, there are temporary support and permanent support. Shaft lining costs are high, sometimes accounting for half to two-third of the total shaft costs.

Temporary Support

Temporary safety protection measures were taken to prevent the collapse of the shaft surrounding rock during the construction of the shaft. According to the nature of the shaft’s surrounding rock, the height of the shaft section, and the amount of water inflow in the shaft, temporary support measures can be classified into...