High stress concentration in the ore-rock contact zone leads to severe destruction of pillars between two drifts;with the excavation of drifts, it diverts into surrounding pillars of the newly caved.

• 在矿岩接触带出现高应力集中，导致两进路之间的间柱破坏严重，并随着进路开挖应力逐步向新开挖两进路之间的间柱转移；