by Ken Cole and lan Statham, Arup Geotechnics
This paper was first published in GE’s April 1992 issue. The first part of this paper was published in March 1992.
In the first part of this paper, the writers introduced and described general subsidence in mines, including geological factors and its widespread nature. Mechanisms of mine - collapse were examined covering four types of pillar failure floor punching, ceiling punching, crushing ofpillars and pillar crushing ofoverburden rock. Pillar stresses and pillar strength were explained.