关键词: 六角形进路, 下向回采, 胶结充填, 采场稳定性, FLAC模拟

Abstract: The stope of underhand-stoping and consolidated-filling by hexagonal-drift was investigative-object，according to the engineering geo-mechanics date from in-situ test，four different stoping and filling sequences of drift were selected，The stress，displacement and plasticity field of medium around drift were simulated and analyzed with FLAC，the stress-strain rule，geometry-distortion character and structure-load capability of stope tructure-medium influenced by the different stoping-filling sequences was investigated.The analytical results showed that，this stoping-filling sequence was safe，feasible and economical technical，which was the drift in the middle of stope was mined first，advanced to headwall step by step，excavated headwall first and footwall secondly，stoping and filling sublevel，the structure-medium stability of stope was influenced by mining and filling less.The inspection and shoring on the stress-focus position was at wall-rock and bottom-rock of headwall and footwall drift should be strengthened，the intensity index of top-filling-body should be ensured.

Key words: Hexagonal drift, Underhand stoping, Consolidated backfilling, Stope stability, FLAC simulation