Study on constant resistance control measures of soft rock roadway in Nanshan Coal Mine

Based on the engineering geological conditions and the engineering status of the eastern areas of Nanshan coal mine, this paper Summarize and analyze the characteristics of the region:in the large range of roadway deformation failure there are two sides of large amount of roof subsidence and serious drum-up of deformation of floor and obvious asymmetry,and come to a conclusion that when supported in the area of soft rock roadway we should not only meet at the beginning of the deformation of roadway can prevent deformation of roadway surrounding rock, also to satisfy to continuous absorption of the great energy release of surrounding rock materials, floor drum up. The way to resolve the serious problem that prestresses specially roadway stability control countermeasures is NPR high prestressed constant resistance bolt (anchor) + corner anchor. According to the site engineering geological conditions and surrounding rock properties of the corresponding engineering geological mechanics model is set up .Then verifies the correctness of support countermeasures by numerical simulation FLAC^3D; finally uses two traditional support forms and the new support contrast at-120 roadway in Nanshan coal mine and detects the supporting effect, site monitoring results demonstrates the reasonableness of support programs