锚固洞室端部参数对抗爆能力影响研究  

Influence of Anchor Top Parameters of Underground Cavity on Explosion Resisting Characteristic

作　　者：王光勇[1,2,3] 余永强[1,2] 王超[1,2] 

机构地区：[1]河南理工大学深部矿井建设重点学科开放实验室,焦作454000 [2]河南理工大学土木工程学院,焦作454000 [3]中国科学技术大学近代力学系,合肥230026

出　　处：《爆破》2014年第1期51-54,共4页Blasting

基　　金：国家自然基金(41072225);深部矿井建设省级重点实验室开放基金(2011KF-05);河南理工大学青年骨干教师资助项目

摘　　要：为了能给两种特殊锚杆支护形式提供施工参数,利用数值分析,研究了端部加密锚杆和端部消波锚杆在顶爆作用下端部参数对抗爆能力影响。数值分析结果表明:当加密部分弹性模量从7.5 GPa增加到22.5 GPa,拱顶位移减小了21%,而当弹性模量从22.5 GPa增加到45 GPa,拱顶位移只减小了4%;锚杆端部消波模型的弹性模量小于0.9 GPa时,拱顶位移从1.8511 mm降到0.10071 mm;两种支护形式的加密和消波部分随着厚度的增大,位移越来越小,但变化越来越缓慢,尤其消波部分厚度变化对提高抗爆能力效果更小。In order to provide construction parameters of two kinds of special bolt support forms, the influence of parameters of the end weakened by holes and anchor top reinforced by dense rock bolts on explosion resisting capaci- ty were studied by numerical analysis under top explosion. The displacement was reduced 21% with the elastic mod- ulus of anchor top reinforced by dense rock bolts from 7.5 GPa to 22.5 GPa,while it was reduce 4% with the in- creasing of elastic modulus from 22.5 GPa to 4.5 GPa. When the elastic modulus of the end weakened by holes was less than 0.9 GPa,the displacement reduced from 1. 8511 mm to 0. 10071 mm. The displacement of the end weak- ened by holes and anchor top reinforced by dense rock bolts was reduced with the thickness increasing, while the rate became smaller.

关 键 词：防护工程 端部加密和消波锚固洞室 弹性模量 厚度 抗爆能力 

分 类 号：TU457[建筑科学—岩土工程]