Abstract: For support problems in Xiashijie Mine +950 m level pumping chamber, in order to effectively control the amout of surrounding rock deformation and ensure production safety, by analyzing the instability mechanism of original bolt-mesh and stone and concrete support, mining influence, physical and chemical properties and rock bottom failure characteristics, the main reason of the surrounding rock instability were obtained. Based on the theory of structural compensation and NATM, the technology of collaborative and stable secondary support for chamber in soft rock is proposed, which effectively control the deformation in Xiashijie Mine +950 m level pumping chamber.