关键词: 内-外复合承载结构, 软岩巷道, 围岩控制, 巷道支护

Abstract: Liu Yuanzi coal mine is a typical soft rock mine, the coal seam and its roof and floor have low strength, easily mudding and expanding when encounter water, soft roadway surrounding rock easily occur large deformation and serious failure under high stress. In order to control roadway surrounding rock’s intensive rheological phenomenon and ensure long-term stability, used field test ,numerical simulation, underground test and mine pressure observation method, proceeded a comprehensive analysis of characteristics and reasons of surrounding rock’s deformation and failure under original supporting method, putted forward "inner-outer compound bearing supporting technology and applied in soft rock roadway supporting. Mine pressure monitoring results show that after the application of this technology, bolt stress is stable, displacement of surrounding rock is small, there’s no obvious separation phenomenon, the surrounding rock stability is promoted，and providing reference for the management of soft rock roadway under the similar conditions.