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LI Shu-cai, YUAN Yong-cai, LI Li-ping, YE Zhi-hua, ZHANG Qian-qing, LEI Ting. Water inrush mechanism and minimum safe thickness of rock wall of karst tunnel face under blast excavation[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(2): 313-320. DOI: 10.11779/CJGE201502015
Citation: LI Shu-cai, YUAN Yong-cai, LI Li-ping, YE Zhi-hua, ZHANG Qian-qing, LEI Ting. Water inrush mechanism and minimum safe thickness of rock wall of karst tunnel face under blast excavation[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(2): 313-320. DOI: 10.11779/CJGE201502015

Water inrush mechanism and minimum safe thickness of rock wall of karst tunnel face under blast excavation

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  • Received Date: July 07, 2014
  • Published Date: March 01, 2015
  • The hydraulic fracturing of rock mass is one of the main factors for water inrush in karst tunnels. From the perspective of fracture mechanics, the impact of explosive stress wave on extension of water-carrying fracture is studied under drilling and blast construction. The results show that the expansion pattern of fracture is influenced by the pore water pressure produced by the explosive stress wave. By establishing the computational model for fractured rock mass, the critical water pressure (Pc) under the explosive stress wave is deduced, and it is verified by cases. Based on the theoretical analysis, numerical experiments and engineering cases, the hysteresis effect of water inrush caused by extended compression-shear failure of rock mass is obtained. According to the hysteresis effect, constructors can terminate construction and leave immediately before the occurrence of water inrush so as to ensure the safety of personnel and mechanical equipments. By analyzing the minimum safe thickness between the fractured rocks of karst tunnel face and high-pressure aquifer, “Two-band theory” is put forward. Furthermore, the formula for the minimum safe thickness is deduced, which can reflect the excavation and water pressure reasonably and is verified by engineering cases. It may provide a reference for the effective measures for water inrush in high-risk karst areas.
  • [1]
    李宗利, 张宏朝, 任青文, 等. 岩石裂纹水力劈裂分析与临界水压计算[J]. 岩土力学, 2005, 26(8): 1216-1220. (LI Zong-li, ZHANG Hong-chao, REN Qing-wen, et al. Analysis of hydraulic fracturing and calculation of critical internal water pressure of rock fracture[J]. Rock and Soil Mechanics, 2005, 26(8): 1216-1220. (in Chinese))
    [2]
    黄润秋, 王贤能, 陈龙生. 深埋隧道涌水过程的水力劈裂作用分析[J]. 岩石力学与工程学报, 2000, 19(5): 573-576. (HUANG Run-qiu, WANG Xiang-neng, CHEN Long-sheng. Hydro-splitting off analysis on underground water in deep-lying tunnel and its effect on water gushing out[J]. Chinese Journal of Rock Mechanics and Engineering, 2000, 19(5): 573-576. (in Chinese))
    [3]
    李利平, 李术才, 张庆松. 岩溶地区隧道裂隙水突出力学机制研究[J]. 岩土力学, 2010, 31(2): 523-528. (LI Li-ping, LI Shu-cai, ZHANG Qing-song. Study of mechanism of water inrush induced by hydraulic fracturing in karst tunnels[J]. Rock and Soil Mechanics, 2010, 31(2): 523-528. (in Chinese))
    [4]
    谢兴华, 速宝玉. 裂隙岩体水力劈裂研究综述[J]. 岩土力学, 2004, 25(2): 330-336. (XIE Xing-hua, SU Bao-yu. A review of fracture rock hydraulic fracturing research[J]. Rock and Soil Mechanics, 2004, 25(2): 330-336. (in Chinese))
    [5]
    陈卫忠, 朱维申, 罗超文. 万家寨引黄工程总干一、二级泵站水力劈裂试验研究[J]. 岩土力学, 2001, 22(1): 26-28. (CHEN Wei-zhong, ZHU Wei-shen, LUO Chao-wen. Hydraulic jacking tests at GMPS1 and GMPS2 of Shanxi Yellow River diversion project[J]. Rock and Soil Mechanics, 2001, 22(1): 26-28. (in Chinese))
    [6]
    郭佳奇, 乔春生. 岩溶隧道掌子面突水机制及岩墙安全厚度研究[J]. 铁道学报, 2012, 34(3): 106-111. (GUO Jia-qi, QIAO Chun-sheng. Study on water-inrush mechanism and safe thickness of rock wall of karst tunnel face[J]. Journal of the China Railway Society, 2012, 34(3): 106-111. (in Chinese))
    [7]
    臧守杰. 强岩溶区隧道施工中隧底最小安全厚度分析研究[J]. 隧道建设, 2007, 27(5): 17-19. (ZANG Shou-jie. Theoretical study on minimum safe thickness of floors of tunnels in heavy karst areas during construction[J]. Tunnel Construction, 2007, 27(5): 17-19. (in Chinese))
    [8]
    范天佑. 断裂动力学原理与应用[M]. 北京: 北京理工大学出版社, 2006. (FAN Tian-you. Principle and application of fracture dynamics[M]. Beijing: Beijing Institute of Technology Press, 2006. (in Chinese))
    [9]
    高庆. 工程断裂力学[M]. 重庆: 重庆大学出版社, 1985. (GAO Qing. Engineering fracture mechanics[M]. Chongqing: Chongqing University Press, 1985. (in Chinese))
    [10]
    王鹰, 陈强, 魏有仪, 等. 岩溶发育区深埋隧道水岩相互作用机理[J]. 中国铁道科学, 2004, 25(4): 55-58. (WANG Ying, CHEN Qiang, WEI You-yi, et al. Water-rock interaction mechanism in deep-buried tunnels in karst area[J]. China Railway Science, 2004, 25(4): 55-58. (in Chinese))
    [11]
    王建秀, 冯波, 张兴胜, 等. 岩溶隧道围岩水力破坏机制研究[J]. 岩石力学与工程学报, 2010, 29(7): 1363-1370. (WANG Jian-xiu, FENG Bo, ZHANG Xing-sheng, et al. Fracture mechanical model and hydrochemical-hydraulic coupled damage evolution equation of limestone[J]. Journal of Tongji University: Natural Science, 2010, 29(7): 1363-1370. (in Chinese))
    [12]
    汪魁, 赵明阶. 岩石压剪裂纹水力劈裂分析及裂纹面方向计算[J]. 重庆交通大学学报(自然科学版), 2010, 29(3): 441-444. (WANG Kui, ZHAO Ming-jie. Analysis on tension-shear complex fracture under rock stress and the calculation of fracture direction[J]. Journal of Chongqing Jiaotong University (Natural Science), 2010, 29(3): 441-444. (in Chinese))
    [13]
    李银平, 杨春和. 裂纹几何特征对压剪复合断裂的影响分析[J]. 岩石力学与工程学报, 2006, 25(3): 462-466. (LI Yin-ping, YANG Chun-he. Influence of geometric characteristics of pre-existing cracks on mixed mode fractures under compression-shear loading[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25(3): 462-466. (in Chinese))
    [14]
    李利平, 李术才, 石少帅, 等. 岩体突水通道形成过程中应力-渗流-损伤多场耦合机制[J]. 采矿与安全工程学报, 2012, 29(2): 232-238. (LI Li-ping, LI Shu-cai, SHI Shao-shuai, et al. Multi-field coupling mechanism of seepage damage for the water inrush channel formation process of coal mine[J]. Journal of Mining & Safety Engineering, 2012, 29(2): 232-238. (in Chinese))
    [15]
    李扬帆, 盛谦, 张勇慧, 等. 地下洞室开挖扰动区研究进展[J]. 地下空间与工程学报, 2013, 9(增刊2): 2083-2091. (LI Yang-fan, SHENG Qian, ZHANG Yong-hui, et al. Advances in research on excavation disturbed zone of underground openings[J]. Chinese Journal of Underground Space and Engineering, 2013, 9(S2): 2083-2091. (in Chinese))
    [16]
    吉小明. 隧道开挖的围岩损伤扰动带分析[J]. 岩石力学与工程学报, 2005, 24(10): 1697-1702. (JI Xiao-ming. Study on mechanical and hydraulic behavior of tunnel surrounding rock masses in excavation-disturbed zone[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(10): 1697-1702. (in Chinese))
    [17]
    余伟健, 杜少华, 王卫军, 等. 高应力软岩近距离巷道工程的掘进扰动与稳定性[J]. 岩土工程学报, 2014, 36(1): 57-64. (YU Wei-jian, DU Shao-hua, WANG Wei-jun, et al. Excavation disturbance and stability of short-distance roadway with high stress and soft rock mass[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(1): 57-64. (in Chinese))
    [18]
    邹洋, 李夕兵, 周子龙, 等. 开挖扰动下高应力岩体的能量演化与应力重分布规律研究[J]. 岩土工程学报, 2012, 34(9): 1677-1684. (ZOU Yang, LI Xi-bing, ZHOU Zi-long, et al. Energy evolution and stress redistribution of high-stress rock mass under excavation distribution[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(9): 1677-1684. (in Chinese))
    [19]
    陈明, 胡英国, 卢文波, 等. 深埋隧洞爆破开挖扰动损伤效应的数值模拟[J]. 岩土力学, 2011, 32(5): 1531-1537. (CHEN Ming, HU Ying-guo, LU Wen-bo, et al. Numerical simulation of blasting excavation induced damage to deep tunnel[J]. Rock and Soil Mechanics, 2011, 32(5): 1531-1537. (in Chinese))
    [20]
    孟召平, 高延法, 卢爱红. 矿井突水危险性评价理论与方法[M]. 北京: 科学出版社, 2011. (MENG Zhao-ping, GAO Yan-fa, LU Ai-hong. Theory and method of risk assessment of mine water bursting[M]. Beijing: Science Press, 2011. (in Chinese))
    [21]
    干昆蓉, 杨毅, 李建设. 某隧道岩溶突水机理分析及安全岩墙厚度的确定[J]. 隧道建设, 2007, 27(3): 13-16. (GAN Kun-rong, YANG Yi, LI Jian-she. Analysis on karst water inflow mechanisms and determination of thickness of safe rock walls: case study on a tunnel[J]. Tunnel Construction, 2007, 27(3): 13-16. (in Chinese))
    [22]
    UNLU T, GERCEK H. Effect of Poisson's ratio on the normalized radial displacements occurring around the face of a circular tunnel[J]. Tunneling and Underground Space Technology, 2003, 18(5): 547-553.

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