基于自稳隐形拱原理的锚杆支护设计

基于自稳隐形拱原理的锚杆支护设计，是在总结锚杆加固围岩机理的基础上，第一次将岩体承载能力的界限划进了屈服范围内，认为锚杆支护的主要作用在于控制锚固区围岩的离层、滑动、张开裂隙等扩容变形与破坏，最大限度地保持围岩完整性，避免有害变形出现，并提出了极限自稳隐形拱是地下巷道围岩可能失稳的最大区间边界。本文运用有限差分法程序FLAC2D对其进行了分析研究，推导出了自稳隐形拱与极限自稳隐形拱的曲线方程，为巷道的锚杆支护技术提供了参考和借鉴，对工程实际具有重要的指导作用。

ROCK BOLTING DESIGN BASED ON THEORIES OF SELF-STABILIZED HIDDEN ARCH

Based on the generalized theories of anchorage,limit of bearing capacity of rockmass is delimited into the yielding range for the first time according to the design on theories of self-stabilized hidden arch.lt is considered that the main function of rock bolting is to control dilatancy and destroy in bolted surrounding rockmass,such as delamination,sliding and fracture opening,to maintain the completeness of surrounding rockmass to maximum extension,and to avoid harmful deformation,and considered that the limit self-stabilized hidden arch is probably the maximum stable boundary of surrounding rockmass of underground roadway.It is studied by using the finite difference method(FLAC2D) in this paper,then the curvilinear equation of self-stabilized hidden arch and limit self-stabilized hidden arch is derived,and provide a reference for the rock bolting of roadway.