开挖卸荷诱导的高储能岩体能量动态释放过程研究

doi:10.13722/j.cnki.jrme.2015.1287

摘要
图/表
参考文献(30)
相关文章 (15)

全文: PDF (2367 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要针对深部岩体开挖，在确定围岩储能极限的基础上，采用优化的局部能量释放率和释放系数指标，研究开挖瞬态卸荷诱导的高储能岩体能量动态释放过程，并分析能量释放与围岩损伤之间的关系。研究结果表明：在开挖卸荷作用下，围岩应变能经历先减小后增大再减小最终稳定的动态变化过程，第一次先减小后增大的动态波动过程与弹性条件相似，由弹性卸载应力波引起，不会造成围岩损伤破坏，而第二次减小由围岩聚集应变能超过其储能极限造成，必然会引起围岩损伤破坏；围岩能量释放率随与开挖面距离的增大先缓慢增大后快速减小，并且越靠近开挖面，能量释放系数越大，完成能量释放所需的时间越短，能量释放越剧烈；此外，能量释放率和释放系数越大，围岩波速降越大，围岩损伤破坏越严重。因此，可通过计算围岩能量释放系数，实现对围岩损伤破坏程度的评估和预测。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	范勇1
	卢文波2
	周宜红1
	严鹏2
	陈明2

关键词 ：岩石力学, 开挖卸荷, 高储能岩体, 能量释放, 损伤

Abstract：For the case of excavation of deep rock mass，based on the determination of energy storage limit，the energy release process of high energy storage rock mass induced by transient unloading of in-situ stress was studied by using local energy release rate and energy release coefficient indexes，and the relationship between energy release and damage of surrounding rock mass was analysed. The results show that，influenced by the excavation unloading，the strain energy of surrounding rock mass firstly decreases，then increases，soon reduces and stabilizes at last. Similar with the elastic case，the first decrease process of strain energy is mainly caused by elastic unloading wave and does not induce damage in surrounding rock mass. While the second decrease process is mainly caused by that the strain energy accumulated in the surrounding rock mass exceeds the energy storage limit，and is bound to induce damage in surrounding rock mass. Further study shows that with the increase of the distance from the excavation face，the energy release rate of surrounding rock increases first and then decreases. The closer distance from excavation boundary means the larger energy release coefficient，the shorter duration time of energy release，and the more drastic energy release. In addition，the bigger energy release rate and coefficient means the larger wave velocity drop and the more serious damage in surrounding rock mass. Therefore，damage degree of surrounding rock mass can be assessed and predicted by calculating the energy release coefficient.

Key words： rock mechanics excavation unloading high energy storage rock mass energy release damage

引用本文:

范勇1，卢文波2，周宜红1，严鹏2，陈明2. 开挖卸荷诱导的高储能岩体能量动态释放过程研究[J]. 岩石力学与工程学报, 2016, 35(S2): 3706-3715.
FAN Yong1，LU Wenbo2，ZHOU Yihong1，YAN Peng2，CHEN Ming2. Study on energy release process of high energy storage rock mass induced by excavation unloading. , 2016, 35(S2): 3706-3715.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2015.1287 或 https://rockmech.whrsm.ac.cn/CN/Y2016/V35/IS2/3706

[1] 伍法权，伍劼，祁生文. 关于脆性岩体岩爆成因的理论分析[J]. 工程地质学报，2010，18(5)：589–595.(WU Faquan，WU Jie，QI Shengwen. Theoretical analysis of mechanism of rock burst of brittle rock mass[J]. Journal of Engineering Geology，2010，18(5)：589–595.(in Chinese))

[2] LU W B，YANG J H，YAN P，et al. Dynamic response of rock mass induced by the transient release of in-situ stress[J]. International Journal of Rock Mechanics and Mining Sciences，2012，53(7)：129–141.

[3] 卢文波，周创兵，陈明，等. 开挖卸荷的瞬态特性研究[J]. 岩石力学与工程学报，2008，27(11)：2 184–2 192.(LU Wenbo，ZHOU Chuangbing，CHEN Ming，et al. Research on transient characteristics of excavation unloading[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(11)：2 184–2 192.(in Chinese))

[4] 严鹏，卢文波，陈明，等. 隧洞开挖过程初始地应力动态卸载效应研究[J]. 岩土工程学报，2009，3(12)：1 888–1 894.(YAN Peng，LU Wenbo，CHEN Ming，et al. Effect of initial geo-stress dynamic unloading during tunnel excavation[J]. Chinese Journal of Geotechnical Engineering，2009，3(12)：1 888–1 894.(in Chinese))

[5] 华安增. 地下工程周围岩体能量分析[J]. 岩石力学与工程学报，2003，22(7)：1 054–1 059.(HUA Anzeng. Energy analysis of surrounding rocks in underground engineering[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(7)：1 054–1 059.(in Chinese))

[6] 钱七虎. 地下工程建设安全面临的挑战与对策[J]. 岩石力学与工程学报，2012，31(10)：1 945–1 956.(QIAN Qihu. Challenges faced by underground projects construction safety and countermeasures[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(10)：1 945–1 956.(in Chinese))

[7] 何满潮，谢和平，彭苏萍，等. 深部开采岩体力学研究[J]. 岩石力学与工程学报，2005，24(16)：2 803–2 813.(HE Manchao，XIE Heping，PENG Suping，et al. Study on rock mechanics in deep mining engineering[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(16)：2 803–2 813.(in Chinese))

[8] TOKSOZ M N，KEHRER H H. Tectonic strain release by underground nuclear explosions and its effect on seismic discrimination[J]. Geophysical Journal International，1972，31(1/3)：141–161.

[9] 徐则民，黄润秋，范柱国，等. 长埋隧道岩爆灾害研究进展[J]. 自然灾害学报，2004，13(2)：16–24.(XU Zemin，HUANG Runqiu，FAN Zhuguo，et a1. Research of rock burst disaster in deep tunnel[J]. Journal of Natural Disasters，2004，13(2)：16–24.(in Chinese))

[10] 谢和平，彭瑞东，鞠杨. 岩石变形破坏过程中的能量耗散[J]. 岩石力学与工程学报，2004，23(21)：3 565–3 570.(XIE Heping，PENG Ruidong，JU Yang. Energy dissipation of rock deformation and fracture[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(21)：3 565–3 570.(in Chinese))

[11] 谢和平，彭瑞东，鞠杨，等. 岩石破坏的能量分析初探[J]. 岩石力学与工程学报，2005，24(15)：2 603–2 608.(XIE Heping，PENG Ruidong，JU Yang，et al. On energy analysis of rock failure[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(15)：2 603–2 608.(in Chinese))

[12] 谢和平，鞠杨，黎立云. 基于能量耗散与释放原理的岩石强度与整体破坏准则[J]. 岩石力学与工程学报，2005，24(17)：3 003– 3 010.(XIE Heping，JU Yang，LI Liyun. Criteria for strength and structural failure of rocks based on energy dissipation and energy release principles[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(17)：3 003–3 010.(in Chinese))

[13] COOK N G W，HOEK E，PRETORIUS J P G，et al. Rock mechanics applied to the study of rockbursts[J]. Journal of the South African Institute of Mining and Metallurgy，1966，66(10)：436–528.

[14] WALSH J B. Energy changes due to mining[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1977，14(1)：25–33.

[15] SALAMON M G. Energy considerations in rock mechanics：fundamental results[J]. Journal of the South African Institute of Mining and Metallurgy，1984，84(8)：233–246.

[16] NAPIER J A L. Energy changes in a rockmass containing multiple discontinuities[J]. Journal of the South African Institute of Mining and Metallurgy，1991，91(5)：145–157.

[17] REVUZHENKOR A F，KLISHIN S V. Energy flux lines in a deformable rock mass with elliptical openings[J]. Journal of Mining Science，2009，45(3)：201–206.

[18] LINDIN G L，LOBANOVA T V. Energy sources of rockbursts[J]. Journal of Mining Science，2013，49(1)：36–43.

[19] 潘岳，王志强，吴敏应. 巷道开挖围岩能量释放与偏应力应变能生成的分析计算[J]. 岩土力学，2007，28(4)：663–669.(PAN Yue，WANG Zhiqiang，WU Minying. Analysis and calculation of energy release and deviatoric stress energy generation of surrounding rock in tunnel excavation process[J]. Rock and Soil Mechanics，2007，28(4)：663–669.(in Chinese))

[20] LI X B，CAO W Z，ZHOU Z L，et al. Influence of stress path on excavation unloading response[J]. Tunnelling and Underground Space Technology，2014，42(42)：237–246.

[21] 范勇，卢文波，严鹏，等. 地下洞室开挖过程围岩应变能调整力学机制[J]. 岩土力学，2013，34(12)：3 580–3 586.(FAN Yong，LU Wenbo，YAN Peng，et al. Mechanism of strain energy adjustment of surrounding rock during excavation of underground caverns[J]. Rock and Soil Mechanics，2013，34(12)：3 580–3 586.(in Chinese))

[22] 范勇，卢文波，王义昌，等. 不同开挖方式下即时型和时滞型岩爆的孕育特征比较[J]. 岩石力学与工程学报，2015，34(增2)： 3 715–3 723.(FAN Yong，LU Wenbo，WANG Yichang，et al. Comparison of evolution characteristics of immediate and time delayed rockbursts under different excavation methods[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(Supp.2)： 3 715–3 723.(in Chinese))

[23] 苏国韶，冯夏庭，江权，等. 高地应力下地下工程稳定性分析与优化的局部能量释放率新指标研究[J]. 岩石力学与工程学报，2006，25(12)：2 453–2 460.(SU Guoshao，FENG Xiating，JIANG Quan，et al. Study on new index of local energy release rate for stability analysis and optimal design of underground rockmass engineering with high geostress[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(12)：2 453–2 460.(in Chinese))

[24] JIANG Q，FENG X T，XIANG T B，et al. Rockburst characteristics and numerical simulation based on a new energy index：a case study of a tunnel at 2，500 m depth[J]. Bulletin of Engineering Geology and the Environment，2010，69(3)：381–388.

[25] CAI M. Influence of stress path on tunnel excavation response- Numerical tool selection and modeling strategy[J]. Tunnelling and Underground Space Technology，2008，23：618–628.

[26] 彭文斌. FLAC^3D实用教程[M]. 北京：机械工业出版社，2008：3.(PENG Wenbin. Practical tutorial of FLAC^3D[M]. Beijing：China Machine Press，2008：3.(in Chinese))

[27] 陈育民，徐鼎平. FLAC/FLAC^3D基础与工程实例[M]. 北京：中国水利水电出版社，2013：2.(CHEN Yumin，XU Dingping. FLAC/ FLAC^3D foundation and engineering examples[M]. Beijing：China Water Power Press，2013：2.(in Chinese))

[28] 张春生，陈祥荣，侯靖，等. 锦屏二级水电站深埋大理岩力学特性研究[J]. 岩石力学与工程学报，2010，29(10)：1 999–2 009. (ZHANG Chunsheng，CHEN Xiangrong，HOU Jing，et al. Study of mechanical behavior of deep-buried marble at Jinping II hydropower station[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(10)：1 999–2 009.(in Chinese))

[29] 严鹏，卢文波，陈明，等. 深部岩体开挖方式对损伤区影响的试验研究[J]. 岩石力学与工程学报，2011，(30)：1 097–1 106.(YAN Peng，LU Wenbo，CHEN Ming，et al. in-situ test research on influence of excavation method on induced damage zone in deep tunnel[J]. Chinese Journal of Rock Mechanics and Engineering，2011，(30)： 1 097–1 106.(in Chinese))

[30] 胡英国，卢文波，陈明，等. 不同开挖方式下岩石高边坡损伤演化过程比较[J]. 岩石力学与工程学报，2013，32(6)：1 176–1 184. (HU Yingguo，LU Wenbo，CHEN Ming，et al. Comparison of damage evolution process of high rock slope excavated by different methods[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(6)：1 176–1 184.(in Chinese))