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本文分析锚杆支护大面积推广应用中的几个技术问题,包括锚杆的加工、巷道的断面形状选择、锚固方式、切眼施工与支护方式、联合支护中刚度的匹配等。它们常被忽视,并影响到支护系统的安全可靠性。作者提出一种高安全可靠性的新型主动支护技术体系,即基于预应力结构理论的高预拉力主动支护:高性能预拉力锚杆、小孔径预拉力锚索、预拉力钢绞线桁架及其组合支护。
This paper analyzes several technical problems in the large-scale application of bolt support, including the machining of bolt, the choice of cross-section shape of tunnel, the anchoring method, the construction and support of cut-outs and the matching of the stiffness in the joint support. They are often overlooked and affect the safety and reliability of the support system. The authors propose a new type of active support technology system with high safety and reliability, that is, high prestressed active support based on the theory of prestressed structure: high-performance pre-tensioned anchor rod, prestressed anchor rod with small aperture, prestressed strand truss And its combination of support.