爆破震动对采空区稳定性影响的FLAC~(3D)分析
|
摘要
针对厂坝铅锌矿受到乱采乱挖破坏的情况,运用FLAC3D对爆破震动作用下采空区的稳定性进行了数值分析。根据现场实测数据,选取了2条不同的实测速度时程曲线作为爆破震动输入,分别进行了静力和动力计算。分析结果表明:(1)采空区开挖后,最大位移量为4.75mm;(2)施加爆破动载荷后,最大位移量增至5.47mm,增幅与爆破震动速度成正比;(3)围岩位移分布的变化受震动波形的影响。爆破震动作用下围岩应力场发生二次重分布,塑性区分布面积明显扩大,采空区右上方露天边坡脚亦受到影响。分析结果与实际观测结果相吻合,并给出了避免爆破震动诱发采空区失稳塌陷的几条建议。
For the reason that Changba lead-zinc mine is severely destroyed by disordered mining,the numerical analysis of mined-out areas under blasting vibration is carried out with FLAC3D . Two different measured velocity time-dependent curves are selected as blasting vibration input according to the in-situ test data;and static calculation and dynamic calculation are carried out,respectively. The analytical results show that the maximum displacement of surrounding rock is 4.75 mm after mined-out areas are excavated,while the maximum displacement of surrounding rock increases to 5.47 mm after the blasting dynamic loading is applied,and amplitude of increasing displacement is proportional to the velocity of blasting vibration. The shape of vibration wave influences the variation of displacement distribution for surrounding rock. When the blasting vibration dynamic loading is appliedt,he second redistribution of stress field of surrounding rock occurs;and the distribution area of plastic zone is expanded obviously. The foot of the right open slope above the mined-out area is also influenced as well. The analytical results are accordant with the observed results. Several suggestions to avoid instability and subside of mined-out areas induced by blasting vibration are brought forward.
For the reason that Changba lead-zinc mine is severely destroyed by disordered mining,the numerical analysis of mined-out areas under blasting vibration is carried out with FLAC3D . Two different measured velocity time-dependent curves are selected as blasting vibration input according to the in-situ test data;and static calculation and dynamic calculation are carried out,respectively. The analytical results show that the maximum displacement of surrounding rock is 4.75 mm after mined-out areas are excavated,while the maximum displacement of surrounding rock increases to 5.47 mm after the blasting dynamic loading is applied,and amplitude of increasing displacement is proportional to the velocity of blasting vibration. The shape of vibration wave influences the variation of displacement distribution for surrounding rock. When the blasting vibration dynamic loading is appliedt,he second redistribution of stress field of surrounding rock occurs;and the distribution area of plastic zone is expanded obviously. The foot of the right open slope above the mined-out area is also influenced as well. The analytical results are accordant with the observed results. Several suggestions to avoid instability and subside of mined-out areas induced by blasting vibration are brought forward.
引文
[1]言志信,王永和,江平,等.爆破地震测试及建筑结构安全标准研究[J].岩石力学与工程学报,2003,22(11):1907–1911.(Yan Zhixin,Wang Yonghe,Jiang Ping,et al. Study on measurement of blast-induced seism and building safety criteria[J]. Chinese Journal of Rock Mechanics and Engineering,2003,22(11):1907–1911.(in Chinese))
[2] Singh P K. Blast vibration damage to underground coal mines from adjacent open-pit blasting[J]. International Journal of Rock Mechanics and Mining Sciences,2002,(39):959–973.
[3] Yang R L,Rocque P,Katsabanis P,et al. Measurement and analysis 第24卷第16期闫长斌等.爆破震动对采空区稳定性影响的 FLAC3D分析?2899? of near-field blast vibration and damage[J]. Geotechnical and Environmental Engineering,1994,12(3):169–182.
[4]言志信,吴德伦,王漪,等.地震效应及安全研究[J].岩土力学,2002,23(2):201–203.(Yan Zhixin,Wu Delun,Wang Yi,et al. The study of blast vibration effect and safety[J]. Rock and Soil Mechanics,2002,23(2):202–204.(in Chinese))
[5]谭忠盛,杨小林,王梦恕.复线隧道施工爆破对既有隧道的影响分析[J].岩石力学与工程学报,2003,22(2):281–285.(Tan Zhongsheng,Yang Xiaolin,Wang Mengshu. Effect of blast in double line tunnel on existing tunnel[J]. Chinese Journal of Rock Mechanics and Engineering,2003,22(2):281–285.(in Chinese))
[6]刘亚群,李海波,赵坚.确定岩质边坡安全阈值的新方法[J].爆炸与冲击,2004,24(5):448–452.(Liu Yaqun,Li Haibo,Zhao Jian. A new method to determine safety threshold velocity of slope[J]. Explosion and Shock Waves,2004,24(5):448–452.(in Chinese))
[7]李宏男,王炳乾,林皋.爆破地震效应苦干问题的探讨[J].爆炸与冲击,1996,16(1):66–72.(Li Hongnan,Wang Bingqian,Lin Gao. Studies on some problems on explosion earthquake responses[J]. Explosion and Shock Waves,1996,16(1):61–67.(in Chinese))
[8] Kuhlemeyer R L,Lysmer J. Finite element method accuracy for wave propagation problems[J]. J. Soil Mech. and Foundations Div.,ASCE,1973,99(SM5):421–427.
[9] Itasca Consulting Group,Inc. FLAC3D(Fast Lagrangian Analysis of Continua in 3D) Version2.10,Users Manual[M]. USA:Itasca Consulting Group,Inc.,2002.
[10]李廷春,李术才,邱祥波.三维快速拉格朗日法在安全顶板厚度研究中的应用[J].岩土力学,2004,25(6):935–939.(Li Tingchun,Li Shucai,Qiu Xiangbo. Application of fast Lagrangian analysis of continua to researching on safe rock covers of Xiamen subsea tunnel[J]. Rock and Soil Mechanics,2004,25(6):935–939.(in Chinese))
[11]朱维申,李晓静,郭彦双,等.地下大型洞室群稳定性的系统性研究[J].岩石力学与工程学报,2004,23(10):1689–1693.(Zhu Weishen,Li Xiaojing,Guo Yanshuang,et al. Systematical study on stability of large underground caverns[J]. Chinese Journal of Rock Mechanics and Engineering,2004,23(10):1689–1693.(in Chinese))
[12]刘春玲,祁生文,童立强,等.利用 FLAC3D 分析某边坡的稳定性[J].岩石力学与工程学报,2004,23(16):2730–2733.(Liu Chunling,Qi Shengwen,Tong Liqiang,et al. Stability analysis of slope under earthquake with FLAC3D[J]. Chinese Journal of Rock Mechanics and Engineering,2004,23(16):2730–2733.(in Chinese))
[13]董玉书,徐友宁.厂坝铅锌矿区民采开发引发的问题思考[J].华南地质与矿产,2002,(4):23–27.(Dong Yushu,Xu Youning. Some problems resulted from disordered mining of lead-zinc ores in Changba orefield[J]. Geology and Mineral Resource of South China,2002,(4):23–27.(in Chinese))
[14]刘松伟,尹贤刚,陈黎明,等.厂坝铅锌矿 II#矿体过渡层的工程地质调查与评价[J].采矿技术,2003,3(4):1–4.(Liu Songwei,Yin Xiangang,Chen Liming,et al. Engineering geology research and evaluation of transitional layer of Changba lead-zinc orefield No.II mine[J].Mining Technology,2003,3(4):1–4.(in Chinese))
[15]袁积余,陈双世.群采破坏后矿山的技术改造与可持续发展[J].矿业快报,2002,(3):10–12.(Yuan Jiyu,Chen Shuangshi. Technical alteration and persistent development of mine after disordered mining destroy[J]. Express Information of Mining Industry,2002,(3):10–12.(in Chinese))
[16]尹贤刚,李庶林,唐海燕,等.厂坝铅锌矿岩石物理力学性质测试研究[J].矿业研究与开发,2003,23(5):12–14.(Yin Xiangang,Li Shulin,Tang Haiyan,et al. The tests and studies of physical mechanical properties of the rocks from Changba lead-zinc mine[J]. Mining Research and Development,2003,23(5):12–14.(in Chinese))
[2] Singh P K. Blast vibration damage to underground coal mines from adjacent open-pit blasting[J]. International Journal of Rock Mechanics and Mining Sciences,2002,(39):959–973.
[3] Yang R L,Rocque P,Katsabanis P,et al. Measurement and analysis 第24卷第16期闫长斌等.爆破震动对采空区稳定性影响的 FLAC3D分析?2899? of near-field blast vibration and damage[J]. Geotechnical and Environmental Engineering,1994,12(3):169–182.
[4]言志信,吴德伦,王漪,等.地震效应及安全研究[J].岩土力学,2002,23(2):201–203.(Yan Zhixin,Wu Delun,Wang Yi,et al. The study of blast vibration effect and safety[J]. Rock and Soil Mechanics,2002,23(2):202–204.(in Chinese))
[5]谭忠盛,杨小林,王梦恕.复线隧道施工爆破对既有隧道的影响分析[J].岩石力学与工程学报,2003,22(2):281–285.(Tan Zhongsheng,Yang Xiaolin,Wang Mengshu. Effect of blast in double line tunnel on existing tunnel[J]. Chinese Journal of Rock Mechanics and Engineering,2003,22(2):281–285.(in Chinese))
[6]刘亚群,李海波,赵坚.确定岩质边坡安全阈值的新方法[J].爆炸与冲击,2004,24(5):448–452.(Liu Yaqun,Li Haibo,Zhao Jian. A new method to determine safety threshold velocity of slope[J]. Explosion and Shock Waves,2004,24(5):448–452.(in Chinese))
[7]李宏男,王炳乾,林皋.爆破地震效应苦干问题的探讨[J].爆炸与冲击,1996,16(1):66–72.(Li Hongnan,Wang Bingqian,Lin Gao. Studies on some problems on explosion earthquake responses[J]. Explosion and Shock Waves,1996,16(1):61–67.(in Chinese))
[8] Kuhlemeyer R L,Lysmer J. Finite element method accuracy for wave propagation problems[J]. J. Soil Mech. and Foundations Div.,ASCE,1973,99(SM5):421–427.
[9] Itasca Consulting Group,Inc. FLAC3D(Fast Lagrangian Analysis of Continua in 3D) Version2.10,Users Manual[M]. USA:Itasca Consulting Group,Inc.,2002.
[10]李廷春,李术才,邱祥波.三维快速拉格朗日法在安全顶板厚度研究中的应用[J].岩土力学,2004,25(6):935–939.(Li Tingchun,Li Shucai,Qiu Xiangbo. Application of fast Lagrangian analysis of continua to researching on safe rock covers of Xiamen subsea tunnel[J]. Rock and Soil Mechanics,2004,25(6):935–939.(in Chinese))
[11]朱维申,李晓静,郭彦双,等.地下大型洞室群稳定性的系统性研究[J].岩石力学与工程学报,2004,23(10):1689–1693.(Zhu Weishen,Li Xiaojing,Guo Yanshuang,et al. Systematical study on stability of large underground caverns[J]. Chinese Journal of Rock Mechanics and Engineering,2004,23(10):1689–1693.(in Chinese))
[12]刘春玲,祁生文,童立强,等.利用 FLAC3D 分析某边坡的稳定性[J].岩石力学与工程学报,2004,23(16):2730–2733.(Liu Chunling,Qi Shengwen,Tong Liqiang,et al. Stability analysis of slope under earthquake with FLAC3D[J]. Chinese Journal of Rock Mechanics and Engineering,2004,23(16):2730–2733.(in Chinese))
[13]董玉书,徐友宁.厂坝铅锌矿区民采开发引发的问题思考[J].华南地质与矿产,2002,(4):23–27.(Dong Yushu,Xu Youning. Some problems resulted from disordered mining of lead-zinc ores in Changba orefield[J]. Geology and Mineral Resource of South China,2002,(4):23–27.(in Chinese))
[14]刘松伟,尹贤刚,陈黎明,等.厂坝铅锌矿 II#矿体过渡层的工程地质调查与评价[J].采矿技术,2003,3(4):1–4.(Liu Songwei,Yin Xiangang,Chen Liming,et al. Engineering geology research and evaluation of transitional layer of Changba lead-zinc orefield No.II mine[J].Mining Technology,2003,3(4):1–4.(in Chinese))
[15]袁积余,陈双世.群采破坏后矿山的技术改造与可持续发展[J].矿业快报,2002,(3):10–12.(Yuan Jiyu,Chen Shuangshi. Technical alteration and persistent development of mine after disordered mining destroy[J]. Express Information of Mining Industry,2002,(3):10–12.(in Chinese))
[16]尹贤刚,李庶林,唐海燕,等.厂坝铅锌矿岩石物理力学性质测试研究[J].矿业研究与开发,2003,23(5):12–14.(Yin Xiangang,Li Shulin,Tang Haiyan,et al. The tests and studies of physical mechanical properties of the rocks from Changba lead-zinc mine[J]. Mining Research and Development,2003,23(5):12–14.(in Chinese))
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心