| Qianjiaying is a coal mine with multi-coal seams and little intervals. In order to reduce the resources loss, 5m wide coal pillar is adopted to protect the coal roadway. With the application of bolting support, the mining safety and efficiency are improved. Because of the influence of multi-mining, there exist large deformation of adjoining rock and large convergence rate between roof and floor. The high efficiency and output is decided by the stability of bolting road-way.In this theses, in the sight of distinguishing features of multi-coal seams and small intervals and the deformation of narrow coal pillar road-way with bolting, a study of narrow coal pillar road-way bolting influencing by multi-mining is developed. The deformation law of 5m coal pillar bolting road-way has been achieved under the influences of mining itself working face, neighbour working face and overburden coal seam mining. The deformation and damage process are reappeared using FLAC (Fast Lagrangian Analysis of Continua) Software, and the fixed quantities of deformation, stress distribution and damage domains are determined. Adopting bolting suspending theory and bolting combined plate theory, the supporting patterns and parameters are designed, and the optimization of narrow coal pillar bolting road-way is proposed. On the basis of theoretical and numerical analysis, a typical bolting road-way is selected and experienced. The monitoring results demonstrated that the designed parameters is reasonable.
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