FIELD TEST STUDY OF BLAST-RESISTING OF A NEW COMPOSITE ANCHORAGE TYPE OF STRUCTURE IN ROCK—— ANALYSIS OF MACRO EFFECT AND MEASUREMENT RESULT
LU Weiguo1，GAO Qian1，ZENG Xianming1，2，LI Shimin2，LIN Dalu2，HOU Fengze3
(1. School of Civil and Environment Engineering，University of Science and Technology Beijing，Beijing 100083，China；2. The Third Research Institute of Engineering Corps，Luoyang，Henan 471023，China；3. Department of Mechanical Engineering and Mechanics，University of Science and Technology of China，Hefei，Anhui 230026，China)
Abstract：In order to research whether the new composite anchorage type of structure can improve the blast-resisting behavior for rock cavities，comparative field blast-resisting tests of new composite anchorage type of structure and single anchorage type of structure have been carried out. It is shown that critical damage load of cavity of new composite anchorage type of structure is 143% against that of the single anchorage type of structure. For the damage extent，the cavity of single anchorage type of structure is 2.5 times larger than that of new composite one. Under the lower blast load，the value of the vibration acceleration of the single anchorage type of structure is 1.6 to 12.3 times larger than that of the new composite one. The average displacement of the new composite anchorage type of structure is 65% compared with that of the single one. The time stress wave time acting on new composite anchorage type of structure is 2.5 to 5.0 times larger than that of the single one. The maximum strain of single anchor bolts is 2 to 4 times and even 6.9 times larger than that of the new composite one. The maximum surface strain of single anchorage structure is 2 times larger than that of the new composite anchorage structure. The new composite anchorage type of structure has an obvious reducing effect. So it is feasible to adopt the new composite anchorage type of structure to reinforce the rock cavity，which has great technical and economic benefits.
陆卫国，高谦，曾宪明,李世民，林大路，侯丰泽. 岩石中新型复合锚固类结构抗爆性能现场试验研究——宏观效应与量测结果分析[J]. 岩石力学与工程学报, 2009, 28(08): 1704-1713.
LU Weiguo1，GAO Qian1，ZENG Xianming1，2，LI Shimin2，LIN Dalu2，HOU Fengze3. FIELD TEST STUDY OF BLAST-RESISTING OF A NEW COMPOSITE ANCHORAGE TYPE OF STRUCTURE IN ROCK—— ANALYSIS OF MACRO EFFECT AND MEASUREMENT RESULT. , 2009, 28(08): 1704-1713.
