爆破荷载作用下洞室锚杆受力特征实验研究  

Experimental Study on the Mechanical Characteristics of Rock Bolts under Blast Loading

作　　者：孙冰[1] 袁登 曾晟[2] 

机构地区：[1]南华大学土木工程学院,湖南衡阳421001 [2]南华大学核资源工程学院,湖南衡阳421001

出　　处：《防灾减灾工程学报》2017年第2期302-307,共6页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家自然科学基金项目(51204098);南华大学"十二五"科技创新团队项目(2012NHCXTD12);省重点学科建设项目资助

摘　　要：为研究洞室锚杆在爆破荷载作用下的受力特征,依据Froude比例分析法,建立了加锚洞室的室内地质力学模型。对锚固洞室不同部位锚杆的应变峰值进行分析,同时对同一根锚杆不同部位应变进行比较分析。结果表明,在爆破荷载作用下,对锚固洞室同一工作面上的锚杆,其拱脚部位锚杆应变峰值明显大于其他部位相应处的;而在同一根锚杆中,最大应变峰值出现在杆体的中部位置,靠近洞壁的一端应变最小,围岩内部的一端应变居中。In order to research the mechanical characteristics of grotto anchor bolt under the explosive load,we built indoors geomechanical model of grotto to add anchor according to proportion analysis. Different positions of grotto anchor bolt to the strain peak values of anchor are analyzed and meanwhile, different positions of strain for the same anchor is analyzed comparatively. The result shows that for the same anchor bolt on the surface of the work, the arch foot part of the bolt strain peak is bigger than that of the other parts of the corresponding place under the explosive load;However, as for the same anchor, maximum strain peak appears in the central position of rod body approaches to the minimum strain at the end of tunnel wall and having the middle strain in the internal part of rockmass.

关 键 词：岩土工程 爆破震动 锚固洞室 受力特征 

分 类 号：TD353[矿业工程—矿井建设]