压力分散型锚杆力学特征影响因素的数值分析  

Numerical Analysis on Influencing Factors of Pressure-Dispersive Rockbolts Mechanical Properties

作　　者：靖洪文[1] 曲天智[1] 吴学兵[1] 张忠宇[1] 

机构地区：[1]中国矿业大学建筑工程学院,江苏徐州221008

出　　处：《西安理工大学学报》2008年第1期32-36,共5页Journal of Xi'an University of Technology

基　　金：国家自然科学基金资助项目(50674083;50490273);教育部科学技术研究重点资助项目(106085)

摘　　要：采用FLAC3D计算程序系统研究了压力分散型锚杆受力在预应力、单元锚固长度、承载体个数、岩石弹性模量等影响因素下的变化规律,获得了压力分散型锚杆应以最后一个锚单元为标准进行设计的结论,并提出了具体预应力条件下的最优单元锚固长度、最优承载体个数。工程实践结果表明,该方法可靠且效果良好。FLAC^3D calculation programming system is used to study the changing laws of the pressure-dispersive rockboct affected by such factors as the prestressing force,unit anchoring length, the number of loading bodies or units and the modulus of rock elasticity;and the conclusion is obtained that the pressure-dispersive rockbolt should be designed with the last anchoring unit as the norm. And at the same time, this paper suggests the optimal unit anchoring length and the numbers of optimal loading bodies under the concrete stress conditions. The results from the engineering practice indicate that this method is reliable and with better effects.

关 键 词：压力分散型锚杆 最优单元锚固长度 数值分析 

分 类 号：TU45[建筑科学—岩土工程]