| 溶洞对隧道爆破开挖影响的数值模拟研究 |
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| 引用本文： | 梁为民,杨小林,战军,余永强.溶洞对隧道爆破开挖影响的数值模拟研究[J].采矿与安全工程学报,2006,23(4):452-455. |
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| 作者姓名： | 梁为民 杨小林 战军 余永强 |
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| 作者单位： | 河南理工大学,土木工程学院,河南,焦作,454000;河南理工大学,土木工程学院,河南,焦作,454000;河南理工大学,土木工程学院,河南,焦作,454000;河南理工大学,土木工程学院,河南,焦作,454000 |
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| 基金项目： | 河南省高校杰出科研人才创新工程项目(2006KYCX012)，河南省科技攻关项目(0624210002)，河南省教育厅科技攻关基金项目(200510460005) |
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| 摘 要： | 在岩溶地区采用钻爆法进行隧道开挖施工，溶洞的存在对隧道爆破开挖安全有直接影响，严重者会造成塌方、伤亡等重大事故．以圆梁山隧道岩溶地形为背最，采用DYNA-2D软件数值模拟了层状岩溶地区的既有溶洞对隧道爆破开挖的影响，并结合现场进行了研究．研究结果表明，当溶洞与隧道处于不同空间位置关系时，隧道爆破开挖时的应力将重新分布，在隧道拱顶、直墙和墙脚不同位置会出现破坏危险区域．结合现场进行的数值模拟结果与现场隧道破坏状况一致，验证了数值模拟的可靠性，为隧道施工提供了参考依据．
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| 关 键 词： | 岩溶地层 溶洞 隧道 爆破开挖 数值模拟 |
| 文章编号： | 1673-3363(2006)04-0452-04 |
| 修稿时间： | 2006年7月17日 |
Numerical Simulation of Tunnel Excavation by Blasting Under the Influence of Karst Cavities |
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| LIANG Wei-min,YANG Xiao-lin,ZHAN Jun,YU Yong-qiang.Numerical Simulation of Tunnel Excavation by Blasting Under the Influence of Karst Cavities[J].Journal of Mining and Safety Engineering,2006,23(4):452-455. |
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| Authors: | LIANG Wei-min YANG Xiao-lin ZHAN Jun YU Yong-qiang |
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| Abstract: | Tunnel excavation by blasting can be directly influenced by karst cavities when tunnelling through the karst strata with blasting method,which brings a lot of damages such as landslide and casualties.Taking the geologic situation of karst strata of Yuanliangshan tunnel into account,the influence of existing cavities in stratified karst strata on the tunnel blasting excavation was simulated by using the software DYNA-2D and studied based on in-situ data.The results show that the stress of tunnel blasting will be redistributed when the cavity and the tunnel are located at different spatial positions and some dangerous zones may appear in the arch crown,stalk and the corner of the tunnel.The result of numerical simulation is consistent with the actual case,proving the reliability of numerical simulation method and offering some references for the tunnel excavation. |
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| Keywords: | karst stratum cavity tunnel tunnel excavating by blasting numerical simulation |
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