caving ground

caving ground

[′kāv·iŋ ‚grau̇nd]
(mining engineering)
Rock formation that will not stand in the walls of an underground opening without support such as that offered by cementation, casing, or timber.
References in periodicals archive ?
The scope of work includes, but is not limited to the furnishing and installing of all pipes, valves, blow-offs, bends, couplings, mechanical restraints, fire hydrants, all fittings, and worker protection from tie hazard of caving ground.
The hole was abandoned in badly caving ground, although it may be reopened and deepened in 2002.
The hole could not be completed due to caving ground.