| 采动下卧煤层对深埋隧道结构稳定性的影响 |
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| 引用本文： | 李晓红,靳晓光,王宏图,姜德义.采动下卧煤层对深埋隧道结构稳定性的影响[J].岩土力学,2005,26(9):1448-1451. |
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| 作者姓名： | 李晓红 靳晓光 王宏图 姜德义 |
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| 作者单位： | 1. 重庆大学,西南资源开发及环境灾害控制工程教育部重点实验室,重庆,400030
2. 重庆大学,土木工程学院,重庆,400030;重庆大学,西南资源开发及环境灾害控制工程教育部重点实验室,重庆,400030 |
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| 基金项目： | 国家自然科学基金重点项目(No.50334060)。 |
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| 摘 要： | 通过3D有限元数值模拟,在分析某深埋隧道煤系地层隧道开挖、初期支护和二次支护动态施工过程的基础上,重点分析了下卧煤层(倾角α=35°,厚度h=2.8m)按全陷落法分段开采后隧道支护结构的位移、应力特征,得到了下卧煤层经济安全的禁采深度。为复杂地质条件下煤系地层隧道建设和合理开采矿产资源提供了科学依据。
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| 关 键 词： | 下卧煤层 开采 深埋隧道 数值分析 结构稳定性 |
| 文章编号： | 1000-7598-（2005）09-1448-04 |
| 收稿时间： | 2005-02-28 |
| 修稿时间： | 2005-02-282005-05-30 |
Study on structural stability of deep buried highway tunnel with underlying coal bed exploiting |
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| LI Xiao-hong,JIN Xiao-guang,WANG Hong-tu,JIANG De-yi.Study on structural stability of deep buried highway tunnel with underlying coal bed exploiting[J].Rock and Soil Mechanics,2005,26(9):1448-1451. |
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| Authors: | LI Xiao-hong JIN Xiao-guang WANG Hong-tu JIANG De-yi |
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| Institution: | 1. Key Lab. for the Exploitation of Southwestern Resources & the Environmental Disaster Control Engineering, Ministry of Education, Chongqing 400030, China; 2. College of Civil Engineering, Chongqing University, Chongqing 400030, China |
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| Abstract: | Dynamic construction process which consists of excavation, primary lining and secondary lining of deep buried tunnel (depth above the crown of tunnel about 490 m) was analysed in coal measures strata by 3D FEM numerical simulation. Characteristics of the tunnel support structural displacement and stress changes were analysed emphatically when underlying coal bed (dip angle =30°, thickness h=2.8 m) was exploited according to sub-level and full collapse method. Economic and safe prohibiting exploited depth of underlying coal bed is presented. So that a scientific basis for tunnel construction of coal measures strata and reasonable exploiting mineral resources in complex geological conditions is offered. |
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| Keywords: | underlying coal bed exploitation deep buried tunnel numerical analysis structural stability |
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