Based on bolt mechanics model, main factors influencing bolting strength are analyzed. For soft rock roadways, less bolting capability and low bolting strength are main causes for bolt losing effective- ness. From the numerical simulation of rock bolt pull-test, the influence of bolting-grouting on the surrounding rock self-bearing capacity and bolt behavior is studied. Meanwhile the measures of en- hancing bolting strength re advanced. Strong bolt combined with bolting-grouting can effectively control the deformation of soft rock roadways.
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