爆破开挖扰动下深埋隧洞围岩含水裂隙起裂机制研究

doi:10.13722/j.cnki.jrme.2023.0367

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摘要为给富水地层钻爆法施工深埋隧洞突水灾害防控提供理论支持，针对爆破开挖扰动下深埋隧洞围岩含水裂隙起裂机制，明晰爆破与开挖瞬态卸荷双重动力作用下深埋隧洞裂隙围岩物理开挖过程和力学状态调整过程，揭示爆破荷载作用过程中深埋隧洞裂隙围岩应力状态的动态调整机制，建立考虑爆破荷载与地应力瞬态卸荷双重动力耦合作用的含水裂隙及其支裂纹尖端应力强度因子计算方法，并分析裂纹面倾角、裂隙水压力、爆破强度以及地应力水平对含水裂隙支裂纹应力强度因子的影响规律。结果表明：爆破荷载作用初期含水裂隙支裂纹应力强度因子迅速增加，爆破荷载过峰值后裂纹应力强度因子快速下降；地应力卸荷强化了围岩含水裂隙的扩展能力，支裂纹应力强度因子在卸荷结束时变现出现陡增现象；含水裂隙支裂纹尖端应力强度因子随裂纹面倾角的增大而显著减小，随裂隙水压力的增加而小幅增加，地应力卸荷前支裂纹应力强度因子随爆破强度增大而明显增加；在爆破荷载快速增加阶段，支裂纹应力强度因子随地应力水平增加而减小，卸荷即将结束阶段，支裂纹应力强度因子随地应力水平增加而增大，高地应力水平的卸荷作用会显著促进围岩含水裂隙起裂扩展，加剧围岩水力破坏。

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	郭佳奇1
	毋文涛1
	颜天佑2
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	李建贺2
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	黄猛1

关键词 ：隧道工程, 深埋隧洞, 围岩含水裂隙, 爆破, 瞬态卸荷, 应力强度因子

Abstract：This study seeks to furnish theoretical support for mitigating water inrush disasters during the excavation of deep-buried tunnels using the drilling and blasting method in water-rich areas. As to the mechanism of water-bearing fracture initiation in the surrounding rock mass of the deep-buried tunnel under the disturbance of drilling and blasting，the physical excavation and the mechanical state adjustment processes of the surrounding rock in deep-buried tunnel under the dual dynamic effects of transient unloading caused by excavation and blasting were revealed，and the dynamic adjustment mechanism of the stress state in the fractured surrounding rock under the blasting load was revealed. A calculation method for the stress intensity factor at water-bearing cracks and their branch cracks, considering the dual dynamic coupling effects of transient unloading due to geostress and blasting was established. The influence of the crack inclination angle，crack water pressure，blasting intensity，and geostress on the stress intensity factor of water-bearing branch cracks were analyzed. The results indicate that the stress intensity factor of water-bearing branch cracks increases rapidly at the initial stage of the blasting load，followed by a swift decrease post-peak blasting load. Geostress unloading enhances the extension capacity of water-bearing cracks，with a significant surge in the stress intensity factor of branch cracks upon completion of the unloading process. The stress intensity factor at water-bearing branch cracks decreases significantly with an increase in crack inclination angle，increases slightly with the increase of the cracks water pressure，and increases significantly with the increase of the blasting intensity prior to geostress unloading. During the rapid increase phase of the blasting load，the stress intensity factor of branch cracks decreases with rising ground stress. As the unloading process approaches its conclusion，the stress intensity factor of branch cracks increases with higher ground stress levels. The unloading effect at high ground stress significantly promotes the initiation and expansion of aquifer fractures in the surrounding rock，intensifying hydraulic damage to the rock mass.

Key words： tunnelling engineering deep-buried tunnel water-bearing fractured surrounding rock mass blasting transient unloading stress intensity factor

引用本文:

郭佳奇1，毋文涛1，颜天佑2，3，李建贺2，3，黄猛1. 爆破开挖扰动下深埋隧洞围岩含水裂隙起裂机制研究[J]. 岩石力学与工程学报, 2024, 43(S2): 3597-3608.
GUO Jiaqi1，WU Wentao1，YAN Tianyou2，3，LI Jianhe2，3，HUANG Meng1. Study on crack initiation mechanism of water-bearing fractures in surrounding rock mass of deep-buried tunnel under blasting excavation disturbance. , 2024, 43(S2): 3597-3608.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2023.0367 或 https://rockmech.whrsm.ac.cn/CN/Y2024/V43/IS2/3597

[1]	郭佳奇. 岩溶隧洞防突厚度及突水机制研究[博士学位论文][D]. 北京：北京交通大学，2011.(GUO Jiaqi. Study on against-inrush thickness and waterburst mechanism of karst tunnel[Ph. D. Thesis][D]. Beijing：Beijing Jiaotong University，2011.(in Chinese))
[2]	郭佳奇，陈建勋，陈帆，等.岩溶隧洞断续节理掌子面突水判据及灾变过程[J]. 中国公路学报，2018，31(10)：118-129.(GUO Jiaqi，CHEN Jianxun，CHEN Fan，et al. Water inrush criterion process of a karst tunnel face with non-persistent joints[J]. China Journal of Highway and Transport，2018，31(10)：118-129.(in Chinese))
[3]	黄润秋，王贤能，陈龙生. 深埋隧洞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 Runqiu，WANG Xianneng，CHEN Longsheng. Hydro-splitting off analysis on underground water in deep-lying tunnels and its effect on water gushing out[J]. Chinese Journal of Rock Mechanics and Engineering，2000，19(5)：573-576.(in Chinese))
[4]	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)：1 216-1 220.(LI Zongli，ZHANG Hongchao，REN Qingwen，et al. Analysis of hydraulic fracturing and calculation of critical internal water pressure of rock fracture[J]. Rock and Soil Mechanics，2005，26(8)：1 216-1 220.(in Chinese))
[5]	盛金昌，赵坚，速宝玉. 高水头作用下水工压力隧洞的水力劈裂分析[J]. 岩石力学与工程学报，2005，24(7)：1 226-1 230.(SHENG Jinchang，ZHAO Jian，SU Baoyu. Analysis of hydraulic fracturing in hydraulic tunnels under high water pressure[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(7)：1 226-1 230.(in Chinese))
[6]	赵延林，曹平，汪亦显，等. 裂隙岩体渗流-损伤-断裂耦合模型及其应用[J]. 岩石力学与工程学报，2008，27(8)：1 634- 1 643.(ZHAO Yanlin，CAO Ping，WANG Yixian，et al. Coupling model of seepage-fracture in fractured rock masses and its application[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(8)：1 634-1 643.(in Chinese))
[7]	赵延林，王卫军，赵伏军，等. 渗透压-应力作用下岩体翼形裂纹模型与数值验证[J]. 采矿与安全工程学报，2010，27(3)：370-376. (ZHAO Yanlin，WANG Weijun，ZHAO Fujun，et al. Rock wing cracks model under the action of hydraulic pressure-stress and numerical verification[J]. Journal of Mining and Safety Engineering，2010，27(3)：370-376.(in Chinese))
[8]	赵延林，王卫军，万文，等. 裂隙岩体渗流-断裂耦合机制及应用[J]. 岩土工程学报，2012，34(4)：677-685.(ZHAO Yamlin，WANG Weijun，WAN Wen，et al. Coupling mechanism of seepage-fracture in fractured rock mass and its application[J]. Chinese Journal of Geotechnical Engineering，2012，34(4)：677-685.(in Chinese))
[9]	李利平，李术才，张庆松. 岩溶地区隧洞裂隙水突出力学机制研究[J]. 岩土力学，2010，31(2)：523-528.(LI Liping，LI Shucai，ZHANG Qingsong. 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))
[10]	刘涛影，曹平，范祥，等. 高渗压条件下裂隙岩体的劈裂破坏特性[J]. 中南大学学报：自然科学版，2012，43(6)：2 281-2 287. (LIU Taoying，CAO Ping，FAN Xiang，et al. Splitting failure properties of fractured rock under high water pressure[J]. Journal of Central South University：Science and Technology，2012，43(6)：2 281-2 287.(in Chinese))
[11]	刘永胜. 海底隧洞钻爆开挖围岩稳定性研究[博士学位论文][D]. 北京：北京交通大学，2010.(LIU Yongsheng. Study on surrounding rock stability of subsea tunnel during drilling and blasting excavation[Ph. D. Thesis][D]. Beijing：Beijing Jiaotong University，2010.(in Chinese))
[12]	陈明，卢文波，严鹏，等. 爆破开挖对岩体含水裂纹扩展的扰动机制[J]. 岩土力学，2014，35(6)：1 555-1 560.(CHEN Ming，LU Wenbo，YAN Peng，et al. Disturbance mechanism of blasting excavation to aquiferous rock crack propagation[J]. Rock and Soil Mechanics，2014，35(6)：1 555-1 560.(in Chinese))
[13]	张风达，申宝宏，康永华. 考虑卸荷作用的底板突水破坏机制研究[J]. 岩土力学，2016，37(2)：431-438.(ZHANG Fengda，SHEN Baohong，KANG Yonghua，et al. Water inrush failure mechanism of mining floor under unloading Effect[J]. Rock and Soil Mechanics，2016，37(2)：431-438.(in Chinese))
[14]	王聪聪，韩雪靖，黄慎，等. 含水裂纹在爆破扰动下的断裂机制[J]. 工程爆破，2018，24(1)：13-19.(WANG Congcong，HAN Xuejing，HUANG Shen，et al. Fracture mechanism of water cracks under blasting disturbance[J]. Engineering Blasting，2018，24(1)：13-19.(in Chinese))
[15]	刘永胜，彭立，王梦恕，等. 爆破作用下隧洞裂隙围岩破裂范围[J]. 中国公路学报，2015，28(10)：83-89.(LIU Yongsheng，PENG Li，WANG Mengshu，et al. Blast-induced fractured zone of fractured rock-mass tunnel[J]. China Journal of Highway and Transport，2015，28(10)：83-89.(in Chinese))
[16]	严鹏，李涛，卢文波，等. 深埋隧洞爆破开挖荷载诱发围岩损伤特性[J]. 岩土力学，2013，34(增1)：451-457.(YAN Peng，LI Tao，LU Wenbo，et al. Properties of excavation damaged zone under blasting load in deep tunnels[J]. Rock and Soil Mechanics，2013，34(Supp.1)：451-457.(in Chinese))
[17]	吴顺川，李利平，张晓平，等. 岩石力学[M]. 北京：高等教育出版社，2021：172-174.(WU Shunchuan，LI Liping，ZHANG Xiaoping，et al. Rock Mechanics[M]. Beijing：Higher Education Press，2021：172-174.(in Chinese))
[18]	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)：105-111.(GUO Jiaqi，QIAO Chunsheng. 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)：105-111.(in Chinese))
[19]	赵延林，曹平，林杭，等. 渗透压作用下压剪岩石裂纹流变断裂贯通机制及破坏准则探讨[J]. 岩土工程学报，2008，30(4)：511-517.(ZHAO Yanlin，CAO Ping，LIN Hang，et al. Rheologic fracture mechanism and failure criterion of rock cracks under compressive-shear load with seepage pressure[J]. Chinese Journal of Geotechnical Engineering，2008，30(4)：511-517.(in Chinese))
[20]	KEMENY J M. A model for nonlinear rock deformation under compression due to subcritical crack growth[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1991，6(28)：459-467.
[21]	KEMENY J M，COOK N G W. Crack models for the failure of rocks in compression，constitutive laws for engineering materials：theory and applications[M]. New York：Elsevier，1987：879-887.
[22]	杨建华. 深部岩体开挖爆破与瞬态卸荷耦合作用效应[博士学位论文][D]. 武汉：武汉大学，2014.(YANG Jianhua. Coupling effect of blasting and transient release of in-situ stress during deep rock mass excavation[Ph. D. Thesis][D]. Wuhan：Wuhan University，2014.(in Chinese))