侧爆作用下锚固洞室破坏形式及机理研究  

Study on failure forms and mechanism of anchorgal tunnels under adjacent blasting

作　　者：王光勇[1,2] 王超[1] 余永强[1] 

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(土木工程学院),河南焦作454000 [2]中国科学技术大学近代力学系,合肥230026

出　　处：《河南理工大学学报（自然科学版）》2014年第6期810-813,共4页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家自然科学基金资助项目(41072225);河南省科技攻关项目(142102210433);河南省教育厅科学技术研究重点项目科技攻关计划(14A440003);深部矿井建设省级重点实验室开放基金资助项目(2011KF-05)

摘　　要：为了进一步提高锚固洞室在侧爆作用下的抗爆能力,利用数值分析软件LS-DYNA3D程序,研究了在侧爆作用下的锚固洞室的破坏形式及机理.数值分析结果表明:压应力波一开始是以球形向四周传播的,当压应力波碰到洞室壁时,会在洞室壁表面产生拉应力波,并以椭圆形式向反向传播;在应力波整个传播过程中,由于反射拉伸可能会在洞室锚固区和非锚固区先后产生二次拉伸破坏,最后可能会由于洞室反射的拉伸波和地面反射拉伸波相遇共同作用,在离地面比较浅的地方产生拉伸破坏区.In order to improve the explosion resisting capacity of anchorgal tunnels,the destructional forms and mechanism were studied under the adjacent blasting based on LS-DYNA3D software.The results show that pressure stress waves propagated in a sphere form,and when pressure stress waves encountered the tunnel,tensile stress waves were produced on the surface of the tunnel and propagated in an ellipse form in the opposite direction.Because of reflected tension waves,tensile failures would form in an anchorage zone and no supporting zone successively.At last,when reflected tension waves generated on the surfaces of the tunnel encountered the reflected tension waves on the ground,a tensile failure zone might be formed under the ground.

关 键 词：岩石力学 侧爆 锚固洞室 破坏形式 破坏机理 

分 类 号：TU457[建筑科学—岩土工程]