高地应力硐室光面爆破孔间应力相互作用与成缝机制

doi:10.13722/j.cnki.jrme.2022.1127

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (4044 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要针对高地应力条件硐室光面爆破，首先采用柱腔激发模型计算光爆孔孔间爆炸应力场，并分析地应力与孔间爆炸应力场的叠加规律；然后，采用验证过的RHT数值模型，模拟单孔、双孔、三孔及地应力条件下爆炸环向拉应力场，并研究径向不耦合系数、孔间距和地应力对光面爆破孔间成缝的影响；最后，给出考虑地应力影响的光面爆破参数选择建议，并成功应用于锦屏二级水电站引水隧洞爆破开挖。研究结果表明：爆炸应力波相互叠加导致光爆孔连线中点附近的爆炸环向拉应力峰值增大，呈现峰状凸起特征，而地应力重分布产生的径向压应力与光爆孔孔间爆炸环向拉应力作用方向相反，会抑制光面爆破孔间成缝和贯穿；受地应力影响，爆生裂缝扩展体现出明显的方向性，更倾向于沿最大主应力方向扩展。因此，对于一般光面爆破设计(孔径42 mm、药径32 mm、光爆层厚度0.6 m)，地应力由20 MPa增大至40 MPa时，光爆孔孔间距应由0.75 m减小至0.60 m，炮孔宜沿最大主应力方向布置，以确保孔间成缝和硐室开挖成型。

	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
	2
	孙金山1
	3
	贾永胜1
	3
	姚颖康1
	3
	张震1
	3
	杜宇翔1
	3

关键词 ：岩石力学, 高地应力, 光面爆破, 环向拉应力, 不耦合装药, 光爆层厚度

Abstract：At first，for the smooth blasting of tunnel under high in-situ stress，the stress field between smooth holes induced by blasting was calculated by using the cylindrical cavity excitation model，and the influence of in-situ stress on the superposition of blasting stress between holes was analyzed. Then，the verified RHT numerical model was employed to simulate the circumferential tensile stress field induced by blasting under the conditions of single hole，double holes，three holes and in-situ stress，and the effect of radial uncoupling coefficient，hole spacing and in-situ stress on the cracking characteristic between smooth blasting holes was studied. Finally，some suggestions on the selection of smooth blasting parameters considering the influence of in-situ stress were given，and an application in blasting excavation of diversion tunnel at Jinping II hydropower station was presented. The results indicate that the superposition of blasting stress waves leads to the increase of the circumferential tensile stress near the midpoint of the line between smooth blasting holes，showing the characteristic of peak shaped bulge，while the radial compressive stress produced by the redistribution of in-situ stress is opposite to the action direction of the circumferential tensile stress induced by blasting between smooth holes，which will inhibit the crack formation and penetration between smooth holes；Influenced by in-situ stress，the propagation of blasting cracks shows obvious directionality and tends to expand along the direction of the maximum principal stress. Therefore，for the general smooth blasting design with the hole diameter of 42 mm，the charge diameter of 32 mm，the smooth blasting layer thickness of 0.6 m，when the in-situ stress increases from 20 MPa to 40 MPa，the hole spacing should be reduced from 0.75 m to 0.60 m，and the holes should be arranged along the direction of the maximum principal stress to ensure the formation of cracks between holes and shaping of excavation wall.

Key words： rock mechanics high in-situ stress smooth blasting circumferential tensile stress uncoupled charge thickness of smooth blasting layer

引用本文:

范勇1，2，孙金山1，3，贾永胜1，3，姚颖康1，3，张震1，3，杜宇翔1，3. 高地应力硐室光面爆破孔间应力相互作用与成缝机制[J]. 岩石力学与工程学报, 2023, 42(6): 1352-1365.
FAN Yong1，2，SUN Jinshan1，3，JIA Yongsheng1，3，YAO Yingkang1，3，ZHANG Zhen1，3，DU Yuxiang1，3. Stress interaction and crack penetration mechanism between smooth blasting holes for tunnel excavation under high in-situ stress. , 2023, 42(6): 1352-1365.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2022.1127 或 http://rockmech.whrsm.ac.cn/CN/Y2023/V42/I6/1352

[2]	戴俊，杨永琦. 光面爆破相邻炮孔存在起爆时差的炮孔间距计算[J]. 爆炸与冲击，2003，23(3)：253-258.(DAI Jun，YANG Yongqi. Calculation of shot hole separation in smooth blasting[J]. Explosion and Shock Waves，2003，23(3)：253-258.(in Chinese))
[9]	朱传云. 预裂与光面爆破对围岩的影响[J]. 爆破，1994，11(2)：33-39.(ZHU Chuanyun. Effect and analysis of surrounding rock from presplit and smooth blasting[J]. Blasting，1994，11(2)：33-39.(in Chinese))
[6]	UENISHI K，YAMACHI H，YAMAGAMI K，et al. Dynamic fragmentation of concrete using electric discharge impulses[J]. Construction and Building Materials，2014，67(Part B)：170-179.
[3]	付玉华，李夕兵，董陇军. 损伤条件下深部岩体巷道光面爆破参数研究[J]. 岩土力学，2010，31(5)：1 420-1 426.(FU Yuhua，LI Xibing，DONG Longjun. Analysis of smooth blasting parameters for tunnels in deep damaged rock mass[J]. Rock and Soil Mechanics，2010，31(5)：1 420-1 426.(in Chinese))
[8]	卢文波. 三峡工程临时船闸与升船机开挖中的爆破方案优化和爆破振动控制[J]. 岩石力学与工程学报，1999，18(5)：516-519.(LU Wenbo. Optimization of blasting procedure and vibration control during excavation of temporary ship lock and ship lift in Three Gorges Project[J]. Chinese Journal of Rock Mechanics and Engineering，1999，18(5)：516-519.(in Chinese))
[10]	郭云龙，康永全，孙崔源，等. 隧道光面爆破护壁装药结构数值模拟分析[J]. 铁道建筑，2020，60(4)：123-126.(GUO Yunlong，KANG Yongquan，SUN Cuiyuan，et al. Numerical simulation analysis of wall protection charge structure in smooth blasting at tunnel[J]. Railway Engineering，2020，60(4)：123-126.(in Chinese))
[11]	赵晓明，杨玉民，蒋楠，等. 深埋引水隧洞光面爆破周边孔装药结构优化试验研究[J]. 高压物理学报，2022，36(4)：208-218. (ZHAO Xiaoming，YANG Yumin，JIANG Nan，et al. Optimization of charging structure of surrounding holes in smooth blasting of deep diversion tunnel[J]. Chinese Journal of High Pressure Physics，2022，36(4)：208-218.(in Chinese))
[13]	谢超群，李启月，刘玉丰，等. 基于SVR的隧道掘进光面爆破效果预测模型[J]. 矿冶工程，2022，42(2)：28-31.(XIE Chaoqun，LI Qiyue，LIU Yufeng，et al. Prediction model of smooth blasting effect in tunnel excavation based on SVR[J]. Mining and Metallurgical Engineering，2022，42(2)：28-31.(in Chinese))
[23]	叶志伟，陈明，李桐，等. 小不耦合系数装药爆破孔壁压力峰值计算方法[J]. 爆炸与冲击，2021，41(6)：119-129.(YE Zhiwei，CHEN Ming，LI Tong，et al. A calculation method of the peak pressure on borehole wall for low decoupling coefficient charge blasting[J]. Explosion and Shock Waves，2021，41(6)：119-129.(in Chinese))
[33]	吴新霞. 锦屏二级水电站引水隧洞开挖程序、爆破参数及起爆网路优化研究报告[R]. 武汉：长江水利委员会长江科学院.(WU Xinxia. Research Report on excavation procedure，blasting parameters and blasting network optimization of diversion tunnel of Jinping II hydropower station[R]. Wuhan：Yangtze River Water Conservancy Commission Yangtze River Academy of Sciences.(in Chinese))
[18]	杨栋，李海波，夏祥，等. 高地应力条件下爆破开挖诱发围岩损伤的特性研究[J]. 岩土力学，2014，35(4)：1 110-1 116.(YANG Dong，LI Haibo，XIA Xiang，et al. Study of blasting-induced dynamic damage of tunnel surrounding rocks under high in-situ stress[J]. Rock and Soil Mechanics，2014，35(4)：1 110-1 116.(in Chinese))
[20]	范勇，卢文波，周宜红，等. 一种高地应力条件下爆破开挖诱发振动峰值的预测模型[J]. 岩土力学，2017，38(4)：1 082-1 088. (FAN Yong，LU Wenbo，ZHOU Yihong，et al. A model for predicting vibration peak induced by blasting excavation under high in-situ stress[J]. Rock and Soil Mechanics，2017，38(4)：1 082-1 088.(in Chinese))
[21]	FAN Y，LU W B，ZHOU Y H，et al. Influence of tunneling methods on the strainburst characteristics during the excavation of deep rock masses[J]. Engineering Geology，2016，201：85-95.
[28]	王志亮，李永池. 工程爆破中径向水不耦合系数效应数值仿真[J]. 岩土力学，2005，26(12)：1 926-1 930.(WANG Zhiliang，LI Yongchi. Numerical simulation on effects of radial water-decoupling coefficient in engineering blast[J]. Rock and Soil Mechanics，2005，26(12)：1 926-1 930.(in Chinese))
[30]	WANG Z L，KONIETZKY H. Modelling of blast-induced fractures in jointed rock masses[J]. Engineering Fracture Mechanics，2009，76(12)：1 945-1 955.
[31]	BANADAKI M M D，MOHANTY B. Numerical simulation of stress wave induced fractures in rock[J]. International Journal of Impact Engineering，2012，40(2)：16-25.
[26]	范勇，吴凡，冷振东，等. 径向不耦合装药爆压消峰作用及其对岩石破裂范围影响[J]. 兵工学报，2023，DOI：10.12382/bgxb.2022.0431.(FAN Yong，WU Fan，LENG Zhendong，et al. Peak elimination effect of radial uncoupled charge on explosion pressure and its influence on rock fracture range[J]. Acta Armamentarii，2023，DOI：10.12382/bgxb.2022.0431.(in Chinese))
[1]	马芹永. 光面爆破炮眼间距及光面层厚度的确定[J]. 岩石力学与工程学报，1997，16(6)：590-594.(MA Qinyong. Definition of hole-space and burden in smooth blasting[J]. Chinese Journal of Rock Mechanics and Engineering，1997，16(6)：590-594.(in Chinese))
[4]	凌伟明. 光面爆破和预裂爆破破裂机制的研究[J]. 中国矿业大学学报，1990，19(4)：79-87.(LING Weiming. A study on the fracture mechanism of smooth blasting and pre-split blasting[J]. Journal of China University of Mining and Technology，1990，19(4)：79-87.(in Chinese))
[7]	FENG X M，ZHUANG J Z，JU J S，et al. Smooth blasting hole spacing and smooth surface layer depth optimization[J]. Journal of Computational and Theoretical Nanoscience，2011，4(8)：2 703-2 707.
[12]	李卓，刘浩杉，黄永辉，等. 基于岩石爆破损伤的合理炮孔参数研究[J]. 有色金属工程，2022，12(4)：100-108.(LI Zhuo，LIU Haoshan，HUANG Yonghui，et al. Study on optimization of blast hole arrangement under rock blasting damage[J]. Nonferrous Metals Engineering，2022，12(4)：100-108.(in Chinese))
[14]	李新平，董千，刘婷婷，等. 不同地应力下爆炸应力波在节理岩体中传播规律模型试验研究[J]. 岩石力学与工程学报，2016，35(11)：2 188-2 196.(LI Xinping，DONG Qian，LIU Tingting，et al. Model test on propagation of blasting stress wave in jointed rock mass under different in-situ stresses[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(11)：2 188-2 196.(in Chinese))
[16]	杨建华，吴泽南，姚池，等. 地应力对岩石爆破开裂及爆炸地震波的影响研究[J]. 振动与冲击，2020，39(13)：64-70.(YANG Jianhua，WU Zenan，YAO Chi，et al. Influences of in-situ stress on blast-induced rock fracture and seismic waves[J]. Journal of Vibration and Shock，2020，39(13)：64-70.(in Chinese))
[17]	杨建华，孙文彬，姚池，等. 高地应力岩体多孔爆破破岩机制[J]. 爆炸与冲击，2020，40(7)：118-127.(YANG Jianhua，SUN Wenbin，YAO Chi，et al. Mechanism of rock fragmentation by multi-hole blasting in highly-stressed rock masses[J]. Explosion and Shock Waves，2020，40(7)：118-127.(in Chinese))
[19]	范勇，江璐，卢文波，等. 圆形隧洞爆破荷载与瞬态卸荷作用围岩应变能效应研究[J]. 岩石力学与工程学报，2017，36(8)：1 855- 1 866.(FAN Yong，JIANG Lu，LU Wenbo，et al. Strain energy characteristics of surrounding rock under blasting load and transient release of geostress during excavation of circular tunnel[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(8)：1 855-1 866. (in Chinese))
[22]	FAN Y，ZHENG J W，CUI X Z，et al. Damage zones induced by in situ stress unloading during excavation of diversion tunnels for the Jinping II hydropower project[J]. Bulletin of Engineering Geology and the Environment，2021，80：4 689-4 715.
[24]	MIKLOWITZ J. Plane-stress unloading waves emanating from a suddenly punched hole in a stretched elastic plate[J]. Journal of Applied Mechanics，1960，27(1)：165-171.
[27]	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，2009，31(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，2009，31(12)：1 888-1 894.(in Chinese))
[29]	WANG Z L，WANG H C，WANG J G，et al. Finite element analyses of constitutive models performance in the simulation of blast-induced rock cracks[J]. Computers and Geotechnics，2021，135(4)：1-12.
[32]	陈秀铜，李璐. 锦屏二级水电站引水隧洞区域三维初始地应力场反演回归分析[J]. 水文地质工程地质，2007，34(6)：55-58.(CHEN Xiutong，LI Lu. Inverse analysis of initial field stress for Jinping-2 hydropower station tunnel area[J]. Hydrogeology and Engineering Geology，2007，34(6)：55-58.(in Chinese))
[34]	中华人民共和国行业标准编写组. DL/T5099—1999 水工建筑物地下工程开挖施工技术规范[S]. 北京：中国电力出版社，1999.(The Professional Standards Compilation Group of People?s Republic of China. DL/T5099—1999 Technical specification for excavation of underground works on hydraulic structure[S]. Beijing：China Electric Power Press，1999.(in Chinese))
[5]	YAMAMOTO M，ICHIJO T，INABA T，et al. Experimental and theoretical study on smooth blasting with electronic delay detonators[J]. Fragblast，1999，3(1)：3-24.
[15]	岳中文，田世颖，张士春，等. 单向围压作用下切缝药包爆破爆生裂纹扩展规律的研究[J]. 振动与冲击，2019，38(23)：186-195. (YUE Zhongwen，TIAN Shiying，ZHANG Shichun，et al. Expanding law of cracks formed by slotted cartridge blast under unidirectional confining pressure[J]. Journal of Vibration and Shock，2019，38(23)：186-195.(in Chinese))
[25]	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))