| By means of numerical simulation, theoretical analysis and field practice, bolt-grouting supporting technology of heavily stressed weak-rock roadway in deep ground is studied wholly and systematically.Based on the analysis of failure features, deformation shapes , the failure mechanism of weak-rock roadway is studied systematically.Optimal supporting time model of bolt-grouting support is given with different methods when analyzing the bolt-grouting supporting mechanism at large. In order to study bolt-grouting supporting mechanism systematically with simulation method in heavily stressed weak-rock coal and rock roadway of Huaibei mine, FEM models under different conditions are found by using FEM program-ANSYS. Finally, construction technics, grouting parameters, and so forth,are studied and applied in the coal and rock roadway of Taoyuan and Qinan mines. In addition, the deformation rules of surrounding rock and tech-economic effects are generally evaluated.
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