THEORETICAL ANALYSIS AND EXPERIMENTAL RESEARCH ON ROCKBURST PREVENTION MECHANISM OF RIGID-FLEXIBLE-RIGID SUPPORTING STRUCTURE
LU Xiangfeng1，2，PAN Yishan2
(1. Institute of Mechanics，Chinese Academy of Sciences，Beijing 100190，China；
2. School of Mechanics and Engineering，Liaoning Technical University，Fuxin，Liaoning 123000，China)
Abstract：The transfer process of shock waves in supporting structure of rigid-flexible-rigid(R-F-R) can be simplified as one-dimensional stress wave propagation in the structure. The law of shock wave pressure attenuation affected by porous metal materials and the shock wave pressure decay influenced by thickness and density of porous metal materials were obtained by the impact theory analysis of prevent blunt mechanism of R-F-R supporting structure. The impact energy-absorption ability of three types of supporting structures was studied by drop hammer impact test. At the same time，the spread and attenuation process of impact wave in R-F-R supporting structure was analyzed. The calculation results show that the shock wave pressure applied to the surface of R-F-R supporting structure is 30.7% of the shock wave pressure applied to the surface of steel bracket，and the R-F-R supporting structure absorbs energy about 94.8% of the total energy. The experimental results also show that the shock wave pressure applied to the surface of R-F-R supporting structure is 50% of the shock wave pressure direct applied to steel bracket，the R-F-R supporting structure can absorb more than 70% of the total energy.
[1] 窦林名，何学秋. 冲击矿压防治理论与技术[M]. 徐州：中国矿业大学出版社，2001：5–29.(DOU Linming，HE Xueqiu. Theory and technology of rock burst prevention[M]. Xuzhou：China University of Mining and Technology Press，2001：5–29.(in Chinese))
[2] 何满潮，谢和平，彭苏萍，等. 深部开采岩体力学研究[J]. 岩石力学与工程学报，2005，24(16)：2 803–2 813.(HE Manchao，XIE Heping，PENG Suping，et al. Study on rock mechanics in deep mining engineering[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(16)：2 803–2 813.(in Chinese))
[3] 康红普，牛多龙，张 镇，等. 深部沿空留巷围岩变形特征与支护技术[J]. 岩石力学与工程学报，2010，29(10)：1 977–1 987.(KANG Hongpu，NIU Duolong，ZHANG Zhen，et al. Deformation characteristics of surrounding rock and supporting technology of gob-side entry retaining in deep coal mine[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(10)：1 977–1 987.(in Chinese))
[4] 何满潮，齐 干，程 骋，等. 深部复合顶板煤巷变形破坏机制及耦合支护设计[J]. 岩石力学与工程学报，2007，26(5)：987–993.(HE Manchao，QI Gan，CHENG Cheng，et al. Deformation and damage mechanisms and coupling support design in deep coal roadway with compound roof[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(5)：987–993.(in Chinese))
[5] 孙晓明，何满潮. 深部开采软岩巷道耦合支护数值模拟研究[J]. 中国矿业大学学报，2005，34(2)：166–169.(SUN Xiaoming，HE Manchao. Numerical simulation research on coupling support theory of roadway within soft rock at depth[J]. Journal of China University of Mining and Technology，2005，34(2)：166–169.(in Chinese))
[6] 姜耀东，王宏伟，赵毅鑫，等. 极软岩回采巷道互补控制支护技术研究[J]. 岩石力学与工程学报，2009，28(12)：2 383–2 390.(JIANG Yaodong，WANG Hongwei，ZHAO Yixin，et al. Study of complementary supporting technology of extremely soft rock mining roadway[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(12)：2 383–2 390.(in Chinese))
[7] 潘一山，吕祥锋，李忠华，等. 高速冲击载荷作用下巷道动态破坏过程试验研究[J]. 岩土力学，2011，32(5)：1 281–1 286.(PAN Yishan，LU Xiangfeng，LI Zhonghua，et al. Experimental study of dynamic failure process of roadway under high velocity impact loading[J]. Rock and Soil Mechanics，2011，32(5)：1 281–1 286.(in Chinese))
[8] 高明仕，窦林名，张 农，等. 冲击矿压巷道围岩控制的强弱强力学模型及其应用分析[J]. 岩土力学，2008，29(2)：359–364.(GAO Mingshi，DOU Linming，ZHANG Nong，et al. Strong-soft-strong mechanical model for controlling roadway surrounding rock subjected to rock burst and its application[J]. Rock and Soil Mechanics，2008，29(2)：359–364.(in Chinese))
[9] 窦林名，陆菜平，牟宗龙，等. 冲击矿压的强度弱化减冲理论及其应用[J]. 煤炭学报，2005，30(6)：690–694.(DOU Linming，LU Caiping，MOU Zonglong，et al. Intensity weakening theory for rockburst and its application[J]. Journal of China Coal Society，2005，30(6)：690–694.(in Chinese))
[10] 吕祥锋，潘一山，李忠华，等. 高速冲击作用下锚杆支护巷道变性破坏研究[J]. 煤炭学报，2011，36(1)：24–28.(LU Xiangfeng，PAN Yishan，LI Zhonghua，et al. Study on deformation and failure of roadway of rock bolting under impact loading[J]. Journal of China Coal Society，2011，36(1)：24–28.(in Chinese))
[11] 康建功，石少卿，陈 进. 泡沫铝衰减冲击波压力的理论分析[J]. 振动与冲击，2010，29(12)：128–131.(KANG Jiangong，SHI Shaoqing，CHEN Jin. Analysis of cladding aluminum foam attenuating blasting pressure[J]. Journal of Vibration and Shock，2010，29(12)：128–131.(in Chinese))
[12] 王宇新，顾元宪，孙 明. 冲击载荷作用下多孔材料复合结构防爆理论计算[J]. 兵工学报，2006，27(2)：375–379.(WANG Yuxin，GU Yuanxian，SUN Ming. Blast-resistant calculation of compound structure with porous material under impact load[J]. Acta Armamentarii，2006，27(2)：375–379.(in Chinese))
[13] 凤 仪，朱震刚，潘 艺，等. 泡沫铝的动态力学性能研究[J]. 稀有金属材料与工程，2005，34(4)：544–548.(FENG Yi，ZHU Zhengang，PAN Yi，et al. Dynamic mechanical properties of aluminum alloy foams[J]. Rare Metal Materials and Engineering，2005，34(4)：544–548.(in Chinese))
[14] KANAHASHI H，MUKAI T，YAMADA Y，et al. Dynamic compression of an ultra-low density aluminum foam[J]. Materials Science and Engineering，2000，280：349–353.
[15] 曾 斐，潘 艺，胡时胜. 泡沫铝缓冲吸能评估及其特性[J]. 爆炸与冲击，2002，22(4)：358–362.(ZENG Fei，PAN Yi，HU Shisheng. Evaluation of cushioning properties and energy-absorption capability of foam aluminum[J]. Explosion and Shock Waves，2002，22(4)：358–362.(in Chinese))
2012, Vol. 31 
