|
|
|
| MODEL TEST RESEARCH ON FAILURE FORMS AND FAILURE MECHANISM OF ANCHOR BOLTS UNDER TOP EXPLOSION |
| WANG Guangyong1，2，GU Jincai3，CHEN Anmin3，XU Jingmao3 |
| (1. Opening Project of Key Laboratory of Deep Mine Construction，Henan Polytechnic University，Jiaozuo，Henan 454000，China；2. School of Civil Engineering，Henan Polytechnic University，Jiaozuo，Henan 454000，China；3. The Third Scientific Research Institute of the Corps of Engineers，General Staff of PLA，Luoyang，Henan 471023，China) |
|
|
|
|
Abstract Based on anti-explosion model test，the failure forms and failure mechanism of the anchor bolts are studied. According to the results of the model tests，anchor bolts under top explosion have four kinds of failure forms，which include compression bending failure，shearing failure，compression bending and tensile failure with shedding of screw cap，and turnover of backing plate. Because the pressure stress is disturbed unevenly under top explosion，which leads to product a few shearing cracks in two sides of arch foot，the four kinds of failure forms are produced. In accordance with failure forms of anchor bolts，technologies with enhancing the explosion resisting capacity of anchor bolts are proposed from the aspects of body of anchor bolts，screw cap and backing plate.
|
|
Received: 02 June 2011
|
|
|
|
| [1] 方从严，卓家寿. 锚杆加固机制的试验研究现状[J]. 河海大学学报：自然科学版，2005，33(6)：696–700.(FANG Congyan，ZHUO Jiashou. Experimental study actuality of rock bolts reinforcement mechanism[J]. Journal of Hohai University：Natural Science，2005，33(6)：696–700.(in Chinese))
[2] 顾金才，沈 俊，陈安敏，等. 锚索预应力在岩体内引起的应变状态模型试验研究[J]. 岩石力学与工程学报，2000，19(增1)：917–921.(GU Jincai，SHEN Jun，CHEN Anmin，et al. Model testing study on strain distribution regularity in rock mass caused by prestressed anchorage cable[J]. Chinese Journal of Rock Mechanics and Engineering，2000，19(Supp.1)：917–921.(in Chinese))
[3] 杨苏杭，梁 斌，顾金才，等. 锚固洞室抗爆模型试验锚索预应力变化特性研究[J]. 岩石力学与工程学报，2006，25(增2)：3 749–3 756. (YANG Suhang，LIANG Bin，GU Jincai，et al. Research on characteristics of prestress change of anchorage cable in anti-explosion model test of anchored cavern[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(Supp.2)：3 749–3 756.(in Chinese))
[4] 杨自友，顾金才，陈安敏，等. 爆炸波作用下锚杆间距对围岩加固效果影响的模型试验研究[J]. 岩石力学与工程学报，2008，27(4)：757–764.(YANG Ziyou，GU Jincai，CHEN Anmin，et al. Model experiment study on the influence of reinforcement effects of intervals of rock bolts in wall rock under the effect of explosive waves[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(4)：757–764.(in Chinese))
[5] 王光勇，顾金才，陈安敏，等. 端部消波和加密锚杆支护洞室抗爆能力模型试验研究[J]. 岩石力学与工程学报，2010，29(1)：51–58.(WANG Guangyong，GU Jincai，CHEN Anmin，et al. Model test research on anti-explosion capacity of underground openings with end weakened by holes and anchor top reinforced by dense rock bolts[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(1)：51–58.(in Chinese))
[6] 杨自友. 锚固洞室的抗爆性能研究[博士学位论文][D]. 合肥：中国科学技术大学，2008.(YANG Ziyou. Study on the anti-detonating characteristics of underground opening reinforced by rockbolts[Ph. D. Thesis][D]. Hefei：University of Science and Technology of China，2008.(in Chinese))
[7] 张亮亮. 抗爆洞室不同部位预应力锚索受力特征研究[博士学位论文][D]. 武汉：武汉理工大学，2009.(ZHANG Liangliang. Study on stress character of prestressed anchorage in different regional antiknock chamber effected[Ph. D. Thesis][D]. Wuhan：Wuhan University of Technology，2009.(in Chinese))
[8] 余永强，顾金才，杨小林，等. 动载下洞室加固锚杆受力的实验研究[J]. 兵工学报2009，30(增2)：263–266.(YU Yongqiang，GU Jincai，YANG Xiaolin，et al. Experimental study on applied force of reinforcement cavity rock bolts under dynamic loading conditions[J]. Acta Armamentarii，2009，30(Supp.2)：263–266.(in Chinese))
[9] 李桂林，余永强，王新生. 动载下洞室锚杆加固效应的数值模拟[J].兵工学报，2009，30(增2)：42–46.(LI Guilin，YU Yongqiang，WANG Xinsheng. Numerical simulation of cavity bolt reinforcement effect under dynamic loading[J]. Acta Armamentarii，2009，30(Supp.2)：42–46.(in Chinese))
[10] 李世民，韩省亮，曾宪明，等. 锚固类结构抗爆性能研究进展[J]. 岩石力学与工程学报，2008，27(增2)：3 553–3 562.(LI Shimin，HAN Shengliang，ZENG Xianming，et al. Research progress of anti- explosion behavior of anchorage type of structure[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(Supp.2)：3 553–3 562.(in Chinese))
[11] 陈剑杰，孙 钧，林俊德，等. 强爆炸应力波作用下岩石地下洞室的破坏现象学[J]. 解放军理工大学学报，2007，8(6)：582–588. (CHEN Jianjie，SUN Jun，LIN Junde，et al. Failure of rock openings under intensive explosion stress wave[J]. Journal of PLA University of Science and Technology，2007，8(6)：582–588.(in Chinese))
[12] 薛亚东，张世平，康天合. 回采巷道锚杆动载响应的数值分析[J]. 岩石力学与工程学报，2003，22(11)：1 903–1 906.(XUE Yadong，ZHANG Shiping，KANG Tianhe. Numerical analysis of dynamic response of rock bolts in mining roadways[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(11)：1 903–1 906.(in Chinese))
[13] 鞠 杨，夏昌敬，谢和平，等. 爆炸荷载作用下煤岩巷道底板破坏的数值分析[J]. 岩石力学与工程学报，2004，23(21)：3 664–3 668. (JU Yang，XIA Changjing，XIE Heping，et al. Numerical analysis of rupture of subfloor of coal mine tunnel subjected to blasting loads[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(21)：3 664–3 668.(in Chinese))
[14] ORTLEPP W D，STACEY T R. Performance of tunnel support under large deformation static and dynamic loading[J]. Tunnelling and Underground Space Technology，1998，13(1)：15–21.
[15] GISLE S，ARNE M. The influence of blasting on grouted rock bolts[J]. Tunnelling and Underground Space Technology，1998，13(1)：65–70.
[16] TANNANT D D，BRUMMER R K，YI X. Rockbolt behavior under dynamic loading field tests and modeling[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1995，32(6)：537–550.
[17] ANDERS A. Laboratory testing of a new type of energy absorbing rock bolt[J]. Tunnelling and Underground Space Technology，2005，20(4)：291–300.
[18] ANDERS A. Dynamic testing of steel for a new type of energy absorbing rock bolt[J]. Journal of Constructional Steel Research，2006，62(5)：501–512.
[19] ZHANG C S，ZOU D H，MADENGA V. Numerical simulation of wave propagation in grouted rock bolts and the effects of mesh density and wave frequency[J]. International Journal of Rock Mechanics and Mining Sciences，2006，43(4)：634–639. |
|
|
|
2012, Vol. 31 
