深部高应力圆形隧洞内部卸荷条件下岩爆模拟试验和强度弱化效应研究

doi:10.13722/j.cnki.jrme.2020.0761

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摘要为了模拟深部高应力圆形隧洞在内部卸荷条件下洞壁发生岩爆的过程，以具有中等岩爆倾向性的红砂岩作为试验材料，利用TRW–3000岩石真三轴电液伺服诱变试验系统，对100 mm×100 mm×100 mm立方体红砂岩试样开展了先加载后钻孔卸荷条件下的岩爆模拟试验。试验模拟500 m深度的二维应力状态，首先对试样加载至设定的初始应力状态，然后利用自主研发的岩石钻孔卸荷试验装置进行岩石内部钻孔卸荷(孔洞直径为25 mm)，之后在竖直方向加载至洞壁发生破坏，达到模拟效果后主动卸载。试验过程中，利用微型摄像机监控并记录洞壁的整个破坏过程。为了对比卸荷作用的影响，对预先贯穿孔洞(孔洞直径为25 mm)的同尺寸红砂岩试样开展了先开孔后加载条件下的岩爆模拟试验。试验结果表明，2种试验条件下均可实现岩爆过程的模拟，整个试验过程均可以划分为平静阶段、颗粒弹射阶段、岩片剥落阶段，最终在洞壁两侧形成V型槽。与先开孔后加载试验相比，先加载后开孔试验中洞壁的初始破坏应力较低，洞壁更容易发生破坏，并且洞壁发生岩爆破坏的严重程度较强，产生的岩片尺寸较大，洞壁剥落岩片的总质量较高，形成的V型槽深度较深，破坏范围较广。试验对比结果表明，高应力岩石内部卸荷会对围岩造成一定程度和范围的损伤，诱发围岩产生明显的强度弱化效应。

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	司雪峰1
	宫凤强2

关键词 ：岩石力学, 深部岩石, 强度弱化, 高应力, 卸荷, 圆形隧洞, 岩爆

Abstract：To simulate the rockburst process of deep high stress circular tunnel sidewalls under internal unloading conditions，100 mm×100 mm×100 mm cube specimens from red sandstone with moderate rock burst tendency were prepared，and rockburst simulation tests under the condition of loading first and then drilling unloading were conducted using TRW–3000 rock true triaxial electro-hydraulic servo mutagenesis test system to simulate the two-dimensional stress state of 500 m depth. Firstly，the specimens were loaded to the set initial stress state，and then a self-developed drilling unloading test device(25 mm hole diameter) was used for rock internal unloading. Subsequently，the loading was applied in the vertical direction until the failure of the hole wall，and the active unloading was applied after the simulation effect was achieved. The rockburst process of the hole sidewall was monitored and recorded using a micro-camera during the tests. In order to compare the effect of unloading，rockburst simulation test was carried out on the same size red sandstone specimens with a prefabricated hole (25 mm hole diameter). The test results show that the rockburst process can be reproduced under these two test conditions. The whole test process can be divided into calm，particle ejection and rock fragment exfoliation stages. Finally，V-shaped notches were found on both sidewalls. Compared with the first drilling and then loading test，the initial failure stress of the hole sidewall in the loading first and then holing test is lower and the hole sidewall is more likely to be damaged. The test results indicate that the internal unloading of high stress rock will cause damage to the surrounding rock in a certain extent and range，and induce obvious strength-weakening effect to the surrounding rock.

Key words： rock mechanics deep rock strength-weakening high stress unloading circular tunnel rockburst

引用本文:

司雪峰1，宫凤强2. 深部高应力圆形隧洞内部卸荷条件下岩爆模拟试验和强度弱化效应研究[J]. 岩石力学与工程学报, 2021, 40(2): 276-289.
SI Xuefeng1，GONG Fengqiang2. Rockburst simulation tests and strength-weakening effect of circular tunnels under deep high stresses and internal unloading conditions. , 2021, 40(2): 276-289.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2020.0761 或 http://rockmech.whrsm.ac.cn/CN/Y2021/V40/I2/276

[31]	HAIMSON B. Micromechanisms of borehole instability leading to breakouts in rocks[J]. International Journal of Rock Mechanics and Mining Sciences，2007，44：157-173.
[4]	何满潮. 应变岩爆实验力学[M]. 北京：科学出版社，2020：1-2.(HE Manchao. Experimental mechanics of strain rockburst[M]. Beijing：Science Press，2020：1-2.(in Chinese))
[1]	LI X B，GONG F Q，TAO M，et al. Failure mechanism and coupled static-dynamic loading theory in deep hard rock mining：a review[J]. Journal of Rock Mechanics and Geotechnical Engineering，2017，9(4)：767-782.
[3]	冯夏庭，陈炳瑞，张传庆，等. 岩爆孕育过程的机制、预警与动态调控[M]. 北京：科学出版社，2013：1-3.(FENG Xiating，CHEN Bingrui，ZHANG Chuanqing，et al. Mechanics，waring and dynamic control of rockburst development processes[M]. Beijing：Science Press，2013：1-3.(in Chinese))
[5]	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.
[8]	何满潮，刘冬桥，宫伟力，等. 冲击岩爆试验系统研发及试验[J]. 岩石力学与工程学报，2014，33(9)：1 729-1 739.(HE Manchao，LIU Dongqiao，GONG Weili，et al. Development of a testing system for impact rockbursts[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(9)：1 729-1 739.(in Chinese))
[11]	GONG F Q，LUO Y，LI X B，et al. Experimental simulation investigation on rockburst induced by spalling failure in deep circular tunnels[J]. Tunnelling and Underground Space Technology，2018，81：413-427.
[13]	张艳博，梁鹏，刘祥鑫，等. 基于多参量归一化的花岗岩巷道岩爆预测试验研究[J]. 岩土力学，2016，37(1)：96-104.(ZHANG Yanbo，LIANG Peng，LIU Xiangxin，et al. An experimental study of predicting rockburst in granitic roadway based on multiparameter normalization[J]. Rock and Soil Mechanics，2016，37(1)：96-104.(in Chinese))
[15]	刘崇岩，赵光明，许文松，等. 高应力巷道岩爆过程及时空演化规律试验研究[J]. 煤炭学报，2020，45(3)：998-1 008.(LIU Chongyan，ZHAO Guangming，XU Wensong，et al. Experimental study on rockburst and its spatio-temporal evolution criterion in high stress roadway[J]. Journal of China Coal Society，2020，45(3)：998-1 008.(in Chinese))
[18]	ZHAO X G，CAI M. Influence of specimen height-to-width ratio on the strainburst characteristics of Tianhu granite under true-triaxial unloading conditions[J]. Canadian Geotechnical Journal，2015，52(7)：890-902.
[21]	黄润秋，黄达. 卸荷条件下花岗岩力学特性试验研究[J]. 岩石力学与工程学报，2008，27(11)：2 205-2 213.(HUANG Runqiu，HUANG Da. Experimental study on mechanical properties of granite under loading conditions[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(11)：2 205-2 213.(in Chinese))
[23]	SI X F，HUANG L Q，LI X B，et al. Experimental investigation of spalling failure of D-shaped tunnel under three-dimensional high-stress conditions in hard rock[J]. Rock Mechanics and Rock Engineering，2020，DOI：10.1007/s00603-020-02280-3.
[25]	FENG X T，HAIMSON B，LI X C，et al. ISRM suggested method： determining deformation and failure characteristics of rocks subjected to true triaxial compression[J]. Rock Mechanics and Rock Engineering，2019，52(6)：2 011-2 020.
[28]	孙叶，谭成轩. 中国现今区域构造应力场与地壳运动趋势分析[J]. 地质力学学报，1995，1(3)：1-12.(SUN Ye，TAN Chengxuan. An analysis of present-day regional tectonic stress field and crustal movement trend in China[J]. Journal of Geomechanics，1995，1(3)：1-12.(in Chinese))
[6]	李夕兵，宫凤强，王少锋，等. 深部硬岩矿山岩爆的动静组合加载力学机制与动力判据[J]. 岩石力学与工程学报，2019，38(4)：708-723.(LI Xibing，GONG Fengqiang，WANG Shaofeng，et al. Coupled static-dynamic loading mechanical mechanism and dynamic criterion of rock burst in deep hard rock mines[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(4)：708-723.(in Chinese))
[16]	LI X B，FENG F，LI D Y，et al. Failure characteristics of granite influenced by sample height?to?width ratios and intermediate principal stress under true?triaxial unloading conditions[J]. Rock Mechanics and Rock Engineering，2018，51(5)：1 321-1 345.
[26]	宫凤强，闫景一，李夕兵. 基于线性储能规律和剩余弹性能指数的岩爆倾向性判据[J]. 岩石力学与工程学报，2018，37(9)：1 993-2 014. (GONG Fengqiang，YAN Jingyi，LI Xibing. Rockburst tendency criterion based on linear energy storage law and residual elastic energy index[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(9)：1 993-2 014.(in Chinese))
[33]	陈炳瑞，冯夏庭，明华军，等. 深埋隧洞岩爆孕育规律与机制：时滞型岩爆[J]. 岩石力学与工程学报，2012，31(3)：561-569.(CHEN Bingrui，FENG Xiating，MING Huajun，et al. Evolution law and mechanism of rockbursts in deep tunnel：Time delayed rockburst[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(3)：561-569.(in Chinese))
[36]	GONG F Q，WU W X，ZHANG L. Brazilian disc test study on tensile strength-weakening effect of high pre-loaded red sandstone under dynamic disturbance[J]. Journal of Central South University，2020，27(10)：2 899-2 913.
[38]	谢良涛，严鹏，范勇，等. 钻爆法与TBM开挖深部洞室诱发围岩应变能释放规律[J]. 岩石力学与工程学报，2015，34(9)：1 786-1 795.(XIE Liangtao，YAN Peng，FAN Yong，et al. Releasing of strain energy induced by excavation using drilling and blasting method and TBM in deep tunnel[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(9)：1 786-1 795.(in Chinese))
[14]	田宝柱，刘善军，张艳博，等. 花岗岩巷道岩爆过程红外辐射时空演化特征室内模拟试验研究[J]. 岩土力学，2016，37(3)：711-718.(TIAN Baozhu，LIU Shanjun，ZHANG Yanbo，et al. Laboratory simulation of temporospatial evolution characteristics of infrared radiation in the process of rockburst in granite tunnel[J]. Rock and Soil Mechanics，2016，37(3)：711-718.(in Chinese))
[24]	周辉，卢景景，胡善超，等. 开挖断面曲率半径对高应力下硬脆性围岩板裂化的影响[J]. 岩土力学，2016，37(1)：140-146.(ZHOU Hui，LU Jingjing，HU Shanchao，et al. Influence of curvature radius of tunnels excavation section on slabbing of hard brittle rockmass under high stress[J]. Rock and Soil Mechanics，2016，37(1)：140-146.(in Chinese))
[34]	宫凤强，陆道辉，李夕兵，等. 动力扰动下预静载硬岩断裂的增韧和减韧效应[J]. 岩石力学与工程学报，2014，33(9)：1 905-1 915. (GONG Fengqiang，LU Daohui，LI Xibing，et al. Toughness increasing or decreasing effect of hard rock fracture with pre-static loading under dynamic disturbance[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(9)：1 905-1 915.(in Chinese))
[2]	CAI M F，BROWN E T. Challenges in the mining and utilization of deep mineral resources[J]. Engineering，2017，3(4)：432-433.
[12]	GONG F Q，SI X F，LI X B，et al. Experimental investigation of strain rockburst in circular caverns under deep three-dimensional high-stress conditions [J]. Rock Mechanics and Rock Engineering，2019，52(5)：1 459-1 474.
[22]	ZHANG C Q，FENG X T，ZHOU H，et al. Case histories of four extremely intense rockbursts in deep tunnels[J]. Rock Mechanics and Rock Engineering，2012，45：275-288.
[32]	READ R S. 20 years of excavation response studies at AECL¢s Underground Research Laboratory[J]. International Journal of Rock Mechanics and Mining Sciences，2004，41：1 251-1 275.
[10]	宫凤强，罗勇，司雪峰，等. 深部圆形隧洞板裂屈曲岩爆的模拟试验研究[J]. 岩石力学与工程学报，2017，36(7)：1 634-1 648. (GONG Fengqiang，LUO Yong，SI Xuefeng，et al. Experimental modelling on rockburst in deep hard rock circular tunnels[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(7)：1 634- 1 648.(in Chinese))
[20]	范鹏贤，李颖，赵跃堂，等. 红砂岩卸载破坏强度特征试验研究[J]. 岩石力学与工程学报，2018，37(4)：852-861.(FAN Pengxian，LI Ying，ZHAO Yuetang，et al. Experimental study on unloading failure strength of red sandstone[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(4)：852-861.(in Chinese))
[30]	MARTIN C D，READ R S，MARTINO J B. Observations of brittle failure around a circular test tunnel[J]. International Journal of Rock Mechanics and Mining Sciences，1997，34(7)：1 065-1 073.
[7]	SI X F，GONG F Q. Strength-weakening effect and shear-tension failure mode transformation mechanism of rockburst for fine-grained granite under triaxial unloading compression[J]. International Journal of Rock Mechanics and Mining Sciences，2020，131：104347.
[9]	HE M C，XIA H M，JIA X N，et al. Studies on classification，criteria and control of rockbursts[J]. Journal of Rock Mechanics and Geotechnical Engineering，2012，4(2)：97-114.
[19]	ZHAO X G，WANG J，CAI M. Influence of unloading rate on the strain burst characteristics of Beishan Granite under true-triaxial unloading conditions[J]. Rock Mechanics and Rock Engineering，2014，47(2)：467-483.
[29]	司雪峰，宫凤强，罗勇，等. 深部三维圆形洞室岩爆过程的模拟试验[J]. 岩土力学，2018，39(2)：621-634.(SI Xuefeng，GONG Fengqiang，LUO Yong，et al. Experimental simulation on rockburst process of deep three-dimensional circular cavern[J]. Rock and Soil Mechanics，2018，39(2)：621-634.(in Chinese))
[17]	DU K，TAO M，LI X B，et al. Experimental study of slabbing and rockburst induced by true-triaxial unloading and local dynamic disturbance[J]. Rock Mechanics and Rock Engineering，2016，49：3 437-3 453.
[27]	GONG F Q，WANG Y L，LUO S. Rockburst proneness criteria for rock materials：Review and new insights[J]. Journal of Central South University，2020，27(10)：2 793-2 821.
[37]	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))
[35]	宫凤强，张乐，李夕兵，等. 不同预静载硬岩在动力扰动下断裂特性的试验研究[J]. 岩石力学与工程学报，2017，36(8)：1 841- 1 854.(GONG Fengqiang，ZHANG Le，LI Xibing，et al. Experimental study on fracture behaviors of hard rock under dynamic disturbance with different pre-static loads[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(8)：1 841-1 854.(in Chinese))