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首页> 外文会议>Asia-Pacific Conference on Shock amp; Impact Loads on Structures; 20031112-14; Changsha, Hunan,(CN) >SIMPLIFIED SPALL-RESISTANCE DESIGN FOR COMBINED ROCK BOLTS AND STEEL FIBRE REINFORCED SHOTCRETE SUPPORT SYSTEM SUBJECTED TO SHOCK LOAD
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SIMPLIFIED SPALL-RESISTANCE DESIGN FOR COMBINED ROCK BOLTS AND STEEL FIBRE REINFORCED SHOTCRETE SUPPORT SYSTEM SUBJECTED TO SHOCK LOAD

机译：冲击载荷作用下岩壁锚杆-钢纤维联合支护系统的简化抗剪设计

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摘要

Practical methods of designing a rock supporting system should take account of all the primary failure mechanisms of the system, and the procedure should be simple enough to be used by engineers following a "step-by-step" approach. In this paper, a review is made of the current state-of-the-art in designing rock support systems for underground structures. The failure mechanism of the typical rock bolt and shotcrete system is then analysed when subjected to short duration shock load induced by a pressure wave resulting from nearby explosion. The shotcrete panel is further simplified as an assumed simply-supported beam subjected to dynamic loading. The beam represents the shotcrete lining bounded by rock bolts at its two ends. The dynamic load is determined by the depth and initial velocity of the spalled rock layer which, in turn, is calculated using one-dimensional elastic wave theory. Finally, an example is given to illustrate the step-by-step approach using the proposed rational design method.
机译：设计岩石支护系统的实用方法应考虑到系统的所有主要失效机理，并且该过程应足够简单，以便工程师遵循“逐步”方法进行使用。本文对当前设计地下结构岩石支撑系统的最新技术进行了回顾。然后，分析了典型岩石锚杆和喷浆系统在受到附近爆炸引起的压力波引起的短时冲击载荷时的破坏机理。喷射混凝土面板被进一步简化为假定承受动态载荷的简支梁。梁代表在其两端由锚杆包围的喷浆衬砌。动载荷由剥落岩石层的深度和初始速度确定，而剥落岩石层的初始速度又由一维弹性波理论计算得出。最后，给出一个例子来说明使用所提出的合理设计方法的逐步方法。

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