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China's coal resources over a long period after the development of large-scale mining conditions are more favorable coal resources has been nearly depleted, mining those buried deep, occurrence conditions of poor coal mining coal resources has become an inevitable trend, which means that the future of mining work will be buried deep, high stress, poor conditions surrounding environment. At present, China's coal mining depth at an annual rate of increase of 8 ~ 12m, the eastern mine is every 10 years 100 ~ 250m pace expected in the next 20 years, many coal mines will be entered into the depth of 1000m to 1500m. Therefore, the deeply buried rock conditions are poor, the high stress of supporting underground engineering problems become deep mining of the key. In this paper, the background Yunjialing mine, mine Yunjialing elaborated into deep mining, the use of bolting technology on two levels deep soft broken rock substations, pump house and other large cross section chamber for retaining control in order to achieve safety, a smooth transition. First, the analysis of deep soft rock crushing large cross section chamber deformation characteristics, failure mechanism and chamber surrounding arch portion of the side wall, the bottom of the mechanical properties. Secondly, the combined level of substation Yunjialing two geological conditions and characteristics of surrounding rock, analyze and summarize Yunjialing deep soft broken rock section chamber support the existing problems, propose deep soft Yunjialing broken rock Large Section supporting design room key principles to be followed, on this basis, developed for deep soft Yunjialing broken rock large cross section chamber support measures, such as pressure relief support, positioning and anti-slip floor heave countermeasures hanging arches. According to the above principles and measures designed for two levels of substation Yunjialing bolting solutions, and the use of numerical simulation software FLAC3D build substation level Yunjialing two numerical simulation model bolting structural system by the forces, deformation and displacement chamber for analysis, validation support design scheme is reasonable. Will eventually be applied to the design level Yunjialing two substations support engineering practice, practice test through engineering design program implementation results. This paper describes the deep soft broken rock large cross section chamber bolting technology Yunjialing mine from design implementation to summarize the results of the whole process. As can be seen from the practice, bolting solution Yunjialing deep soft rock crushing large cross section chamber support problems, and achieved good results, summed up the experience to get reliable data for cloud drive Ridge mine for deep soft rock crushing large cross section chamber support control provides a theoretical basis and technical support.
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