动载下洞室加固锚杆受力的实验研究  

Experimental Study on Applied Force of Reinforcement Cavity Rock Bolts under Dynamic Loading Conditions

作　　者：余永强[1] 顾金才[2] 杨小林[1] 王新生[1] 

机构地区：[1]河南理工大学岩土与地下工程研究所,河南焦作454000 [2]总参工程兵科研三所,河南洛阳471023

出　　处：《兵工学报》2009年第S2期263-266,共4页Acta Armamentarii

基　　金：国家自然基金重点项目(40638040);国家自然基金项目(50874039);河南省教育厅自然科学基金项目(2006130002);河南省高校骨干教师资助项目;河南省重点攻关项目(092102310313)

摘　　要：为研究爆破动载对加固洞室锚杆的影响,运用地质力学模型实验的方法分析了地下洞室加固时的全长粘结式锚杆和自由式锚杆的受力特性。结果表明:在爆炸动载作用下,2种锚杆都产生一定的变形;分析锚杆对围岩的作用力可知,2种锚杆都对洞室变形有明显的抑制作用,约束了围岩的变形,初期,自由式锚杆比全长粘结式锚杆对洞室的加固效果好,在洞室破坏后,全长粘结式锚杆比自由式锚杆加固效果好。To study the influence of dynamic load on the reinforcement cavern bolt,the force characteristics of full-length bond-type and freestyle anchor bolts at reinforcement underground cavern were analyzed by the geomechanical model experimental method.The experimented results show that the two type rock bolts can produce deformation under the role of dynamic load;two bolts can significantly inhibit cavity deformation and restrict deformation of the surrounding rock known by analysing force of the bolt on the surrounding rock,in which initially the reinforced effect on the cavity by freestyle rock bolts is better than that of the full-length bond-type rock bolt,after the destruction of the cavity,the later is better than the former.

关 键 词：动载 洞室 锚杆 实验 

分 类 号：TU476[建筑科学—结构工程]