在管式锚杆注浆对破碎、软弱围岩力学性质改善及提高锚杆锚固力分析的基础上，建立管式锚杆支护条件下的力学模型，通过管式锚杆支护与普通喷锚支护塑性区范围大小的对比分析，揭示了管式锚杆提高破碎、软弱围岩支护效果的机理。理论分析及工程实践表明，管式锚杆对提高破碎、软弱围岩支护效果，控制围岩变形有十分明显的作用，是一种特别适宜于破碎、软弱围岩洞室支护的有效方法。此外，文章还对管式锚杆的特点及施工要点进行了分析和论述。

 Based on analysis of grouted tubular rock bolts used in improving the mechanical property of fractured and weak surrounding rock and enhancing the anchoring force of rock bolts, the mechanical model of tunnel with shotcrete and tubular rock bolt support is created. The comparative analysis between plastic zone formed by tubular rock bolt support and that formed by common rock bolt support demonstrates the mechanism of improving supporting effect of tubular rock bolt in fractured and weak surrounding rock. The theory analysis and construction practice show that tubular rock bolt is an efficient method for tunnel support in fractured and weak surrounding rock. Tubular rock bolt can improve the supporting effect and can control the surrounding rock deformation in these geologic conditions. Moreover, the characteristics and key points in construction of tubular rock bolt are presented in this paper.