WANG Xiangjun，LI Yingming，ZHAO Guangming，et al. Mechanical response analysis of surrounding rock bearing structure of soft rock roadway based on full-length anchorage[J]. Coal Science and Technology，2023，51（10）：24−34
. DOI: 10.13199/j.cnki.cst.2022-1863| Citation: |
WANG Xiangjun，LI Yingming，ZHAO Guangming，et al. Mechanical response analysis of surrounding rock bearing structure of soft rock roadway based on full-length anchorage[J]. Coal Science and Technology，2023，51（10）：24−34 . DOI: 10.13199/j.cnki.cst.2022-1863
|
A mechanical model of full-length anchoring bolt is established to study the stability of mechanical bearing structure of surrounding rock in high stress soft rock roadway after full-length anchoring bolt. The model considers the dilatancy characteristics of soft rock post-peak strength softening and the stress boundary conditions of full-length bolt, and the analytical formula of bolt stress is derived. Furthermore, the mechanical model of full-length anchored surrounding rock is established by equivalent the anchoring force to the form of volume force. From shallow to deep, it is divided into anchorage residual zone, anchorage plastic softening zone, non-anchorage plastic softening zone and elastic zone, and the stress expression of each zone is deduced. Combined with engineering examples, the influence of space effect, expansion coefficient, bolt length and tray reaction force on surrounding rock stress and bolt stress is analyzed. The results show that under the influence of spatial effect, the deformation and failure of roadway presents progressive development. The concept of ' anchorage control zone ' is proposed, that is, in the process of full-length bolt support, the virtual support force and anchoring force of surrounding rock are in a state of reciprocal growth and decline, thus inhibiting the transfer of surrounding rock stress to the deep and effectively reducing the plastic zone. The earlier the anchor bolt is installed, the greater the deformation of the surrounding rock acting on the rod body, and the easier it is to form a common bearing body with the surrounding rock. The axial force of the anchor bolt is proportional to the expansion coefficient. With the increase of the expansion coefficient, the growth rate of the anchoring force is significantly accelerated, which ensures the recovery effect of the anchor bolt on the radial stress of the surrounding rock. The axial force distribution and peak value of the rod body will increase with the increase of the length of the bolt and the bonding range of the surrounding rock/anchoring agent interface, and then the peak area of the tangential stress of the surrounding rock will shift to the direction of the tunnel wall. The effect of the reaction force of the full-length bolt tray is mainly reflected in improving the stress of the bolt, giving full play to the anchoring effect of the bolt and the ability to protect the surface, and having little effect on the boundary of the residual zone and the plastic zone.
| [1] |
赵光明,彭 瑞,孟祥瑞,等. 软岩巷道开挖-支护过程承载结构稳定性分析[J]. 中国矿业大学学报,2017,46(4):792−802. doi: 10.13247/j.cnki.jcumt.000708
ZHAO Guangming,PENG Rui,MENG Xiangrui,et al. Stability of bearing structure during soft roadway excavation-supporting[J]. Journal of China University of Mining & Technology,2017,46(4):792−802. doi: 10.13247/j.cnki.jcumt.000708
|
| [2] |
康红普,姜鹏飞,高富强,等. 掘进工作面围岩稳定性分析及快速成巷技术途径[J]. 煤炭学报,2021,46(7):2023−2045.
KANG Hongpu,JIANG Pengfei,GAO Fuqiang,et al. Analysis on stability of rock surrounding heading faces and technical approaches for rapid heading[J]. Journal of China coal society,2021,46(7):2023−2045.
|
| [3] |
赵呈星,李英明,刘 刚,等. 深部软岩巷道围岩支护技术研究[J]. 煤炭科学技术,2022,50(4):76−84. doi: 10.13199/j.cnki.cst.2019-1024
ZHAO Chengxing,LI Yingming,LIU Gang,et al. Study on surrounding rock support technology of deep soft rock roadway[J]. Coal Science and Technology,2022,50(4):76−84. doi: 10.13199/j.cnki.cst.2019-1024
|
| [4] |
刘 坤,黄其文,孙成磊,等. 易崩解弱胶结软岩巷道失稳机理及控制技术[J]. 煤炭科学技术,2020,48(S2):17−23.
LIU Kun,HUANG Qiwen,SUN Chenglei,et al. Mechanism and control technology of roadway instability in weakly cemented and easily disintegrating soft rock[J]. Coal Science and Technology,2020,48(S2):17−23.
|
| [5] |
韩 征,李龙清. 基于四阶段应力-应变模型的深部巷道围岩弹塑性分析[J]. 煤炭科学技术,2022,50(5):84−91. doi: 10.13199/j.cnki.cst.2020-0746
HANG Zheng,LI Longqing. Elastic-plastic analysis of surrounding rock in deep roadway based on four-stage stress-strain model[J]. Coal Science and Technology,2022,50(5):84−91. doi: 10.13199/j.cnki.cst.2020-0746
|
| [6] |
余伟健,高 谦,朱川曲. 深部软弱围岩叠加拱承载体强度理论及应用研究[J]. 岩石力学与工程学报,2010,29(10):2134−2142.
YU Weijian,GAO Qian,ZHU Chuanqu. Study of strength theory and application of overlap arch bearing body for deep soft surrounding rock[J]. Chinese Journal of Rock Mechanics and Engineering,2010,29(10):2134−2142.
|
| [7] |
李桂臣,杨 森,孙元田,等. 复杂条件下巷道围岩控制技术研究进展[J]. 煤炭科学技术,2022,50(6):29−45. doi: 10.13199/j.cnki.cst.2022-0304
LI Guichen,YANG Sen,SUN Yuantian,et al. Research progress of roadway surrounding strata rock control technologies under complex conditions[J]. Coal Science and Technology,2022,50(6):29−45. doi: 10.13199/j.cnki.cst.2022-0304
|
| [8] |
JAEGER J C, COOK N G W. Fundamentals of rock mechanics[M]. London: Chapman and Hall, 1978.
|
| [9] |
蔡美峰, 何满潮, 刘东燕. 岩石力学与工程[M]. 北京: 科学出版社, 2002.
CAI Meifeng, HE Manchao, LIU Dongyan. Rock mechanics and engineering[M]. Beijing: Science Press, 2002.
|
| [10] |
陈登国,高召宁,赵光明,等. 基于锚固力学效应巷道围岩稳定性分析[J]. 煤炭学报,2020,45(3):1009−1019. doi: 10.13225/j.cnki.jccs.SJ19.1819
CHEN Dengguo,GAO Zhaoning,ZHAO Guangming,et al. Stability anaiysis of surrounding rock under anchorage mechanics effect[J]. Journal of China Coal Society,2020,45(3):1009−1019. doi: 10.13225/j.cnki.jccs.SJ19.1819
|
| [11] |
余 涛,方 勇,姚志刚,等. 隧道预应力锚杆锚固结构承载效应及围岩力学分析[J]. 岩土工程学报,2022,44(6):1069−1077.
YU Tao,FANG Yong,YAO Zhigang,et al. Bearing effect of prestressed bolt-anchored structures and mechanical analysis of surrounding rock[J]. Chinese Journal of Geotechnical Engineering,2022,44(6):1069−1077.
|
| [12] |
孙海良,赵静雅,孙家悦. 深部高地应力巷道组合锚索高压注浆技术研究[J]. 煤炭科学技术,2020,48(12):68−73.
SUN Hailiang,ZHAO Jingya,SUN Jiayue. Study on high-pressure grouting technology with combined anchor and cable under high ground stress roadway[J]. Coal Science and Technology,2020,48(12):68−73.
|
| [13] |
付国彬. 巷道围岩破裂范围与位移的新研究[J]. 煤炭学报, 1995, 20(3): 304−310.
FU Guobin. Recent investigation of extent of fractured zone and displacement of rocks around the roadways[J]. Journal of China Coal Society[J]. 1995, 20(3): 304−310.
|
| [14] |
马念杰. 软化岩体中巷道围岩塑性区分析[J]. 阜新矿业学院学报(自然科学版),1995,14(4):18−21.
MA Nianjie. A study of plastic zone around openings in the softening rockmass[J]. Journal of Fuxin Mining Institute(Natural Science),1995,14(4):18−21.
|
| [15] |
周 建,经来旺,叶金胜,等. 考虑空间和锚固效应的硐室围岩弹塑性分析[J]. 煤炭学报,2018,43(8):2173.
ZHOU Jian,JING Laiwang,YE Jinsheng,et al. Elasto-plastic analysis of chamber rock considering spatial effect and anchorage mechanical effect[J]. Journal of China Coal Society,2018,43(8):2173.
|
| [16] |
煤矿安全规程(最新修订版)[M]. 1版. 北京: 应急管理出版社. 2016.
|
| [17] |
陆士良, 汤 雷, 杨新安. 锚杆锚固力与锚固技术[M]. 北京: 煤炭工业出版社, 1998.
|
| [18] |
陶文斌,吴平平,陈铁林,等. 基于锚杆拉拔试验优化锚固承载特性研究[J]. 煤炭科学技术,2022,50(9):10−19. doi: 10.13199/j.cnki.cst.2020-1609
TAO Wenbin,WU Pingping,CHEN Tielin,et al. Experimental research on optimization of anchorage bearing characteristics based on bolt pull-out test[J]. Coal Science and Technology,2022,50(9):10−19. doi: 10.13199/j.cnki.cst.2020-1609
|
| [19] |
HE L,AN X M,ZHAO Z Y. Fully Grouted Rock Bolts: An Analytical Investigation[J]. Rock Mechanics and Rock Engineering,2015,48(3):1181−1196. doi: 10.1007/s00603-014-0610-0
|
| [20] |
ZHANG W L, HUANG L, JUANG C H. An analytical model for estimating the force and displacement of fully grouted rock bolts[J]. Computers and Geotechnics, 2020, 117.
|
| [21] |
FREEMAN T J. The behaviour of fully-bonded rock bolts in the Kielder experimental tunnel[J]. Tunnels and Tunnelling,1978(7):37−40.
|
| [22] |
王明恕. 全长锚固锚杆机理的探讨[J]. 煤炭学报,1983,7(1):40−47. doi: 10.13225/j.cnki.jccs.1983.01.005
WANG Mingshu. Mechanism of fully-column rock bolt[J]. Journal of China Coal Society,1983,7(1):40−47. doi: 10.13225/j.cnki.jccs.1983.01.005
|
| [23] |
CAI Y,ESAKI T,JIANG Y J. An analytical model to predict axial load in grouted rock bolt for soft rock tunnelling[J]. Tunnelling and Underground Space Technology Incorporating Trenchless Technology Research,2004,19(6):607−618.
|
| [24] |
姚显春,李 宁,陈蕴生. 隧洞中全长粘结式锚杆的受力分析[J]. 岩石力学与工程学报,2005,24(13):2272−2276. doi: 10.3321/j.issn:1000-6915.2005.13.012
YAO Xianchun,LI Ning,CHEN Yunsheng. Theoretical solution for shear stresses on interface of fully grouted bolt in tunnels[J]. Chinese Journal of Rock Mechanics and Engineering,2005,24(13):2272−2276. doi: 10.3321/j.issn:1000-6915.2005.13.012
|
| [25] |
朱训国,杨 庆,栾茂田,等. 围岩中原始垂直地应力对圆形隧洞全长注浆岩石锚杆应力分布模式的影响分析[J]. 岩石力学与工程学报,2009,28(S1):2928−2934.
ZHU Xunguo,YANG Qing,LUAN Maotian,et al. Effect analysis of initial vertical geostress in surrounding rock on stress distribution mode of fully grouted rock bolt in circular tunnel[J]. Chinese Journal of Rock Mechanics and Engineering,2009,28(S1):2928−2934.
|
| [26] |
陈 梁,茅献彪,陈彦龙. 考虑围岩峰后破坏的全锚锚杆受力特性[J]. 煤炭学报,2018,43(4):923−930. doi: 10.13225/j.cnki.jccs.2017.1050
CHEN Liang,MAO Xianbiao,CHEN Yanlong. Mechanical characteristics analysis of fully anchored bolts considering different post-peak failure models of surrounding rock[J]. Journal of China Coal Society,2018,43(4):923−930. doi: 10.13225/j.cnki.jccs.2017.1050
|
| [27] |
侯公羽,李晶晶. 弹塑性变形条件下围岩-支护相互作用全过程解析[J]. 岩土力学,2012,33(4):961−970. doi: 10.16285/j.rsm.2012.04.025
HOU Gongyu,LI Jingjing. Analysis of complete process of interaction of surrounding rock and support under elastoplastic deformation condition[J]. Rock and Soil Mechanics,2012,33(4):961−970. doi: 10.16285/j.rsm.2012.04.025
|
| [28] |
李英明,赵呈星,丛 利,等. 基于实际围岩变形的全长锚固锚杆杆体应力分布特征分析[J]. 煤炭学报,2019,44(10):2966−2973. doi: 10.13225/j.cnki.jccs.2018.1531
LI Yingming,ZHAO Chengxing,CONG Li,et al. Analysis of stress distribution characteristics of fully anchored bolt based on actual surrounding rock deformation[J]. Journal of China Coal Society,2019,44(10):2966−2973. doi: 10.13225/j.cnki.jccs.2018.1531
|
| [29] |
朱训国. 地下工程中注浆岩石锚杆锚固机理研究[D]. 大连: 大连理工大学, 2007.
ZHU Xunguo. The reinforcement mechanics of fully grouted rock bolt in underground engineering[D]. Dalian: Dalian University of Technology, 2007.
|
| [30] |
靖洪文,苏海健,孟 波,等. 巷道锚杆锚固力学特性现场试验研究[J]. 中国矿业大学学报,2022,51(1):16−23. doi: 10.3969/j.issn.1000-1964.2022.1.zgkydxxb202201002
JING Hongwen,SU Haijian,MENG Bo,et al. Field test research on anchorage mechanical characteristics of roadway bolt[J]. Journal of China University of Mining & Technology,2022,51(1):16−23. doi: 10.3969/j.issn.1000-1964.2022.1.zgkydxxb202201002
|
| [31] |
姚国圣,李镜培,谷拴成. 考虑岩体扩容和塑性软化的软岩巷道变形解析[J]. 岩土力学,2009,30(2):463−467. doi: 10.3969/j.issn.1000-7598.2009.02.030
YAO Guosheng,LI Jingpei,GU Shuancheng. Analytic solution to deformation of soft rock tunnel considering dilatancy and plastic softening of rock mass[J]. Rock and Soil Mechanics,2009,30(2):463−467. doi: 10.3969/j.issn.1000-7598.2009.02.030
|
| [32] |
高家美,顿志林. 全长粘结型锚杆支护后围岩应力和位移的线弹性分析[J]. 长沙矿山研究院季刊,1989,9(3):55−64.
GAO Jiamei,DUN Zhilin. A linear elastic analysis of stress and displacement in wall rocks under full-column cemented rock bolting conditions[J]. Quarterly of CimR,1989,9(3):55−64.
|
| [33] |
李英明,赵呈星,刘增辉,等. 围岩承载层分层演化规律及“层-双拱”承载结构强度分析[J]. 岩石力学与工程学报,2020,39(2):217−227.
LI Yingming,ZHAO Chengxing,LIU Zenghui,et al. Research on layered evolution law of surrounding rock bearing layers and strength analysis of “layer-double arch” bearing structure[J]. Chinese Journal of Rock Mechanics and Engineering,2020,39(2):217−227.
|
| [34] |
袁 亮,薛俊华,刘泉声,等. 煤矿深部岩巷围岩控制理论与支护技术[J]. 煤炭学报,2011,36(4):535−543.
YUAN Liang,XUE Junhua,LIU Quansheng,et al. Surrounding rock stability control theory and support technique in deep rock roadway for coal mine[J]. Journal of China Coal Society,2011,36(4):535−543.
|
| [35] |
朱建明,徐秉业,任天贵. 巷道围岩主次承载区协调作用[J]. 中国矿业,2000,9(2):41−44. doi: 10.3969/j.issn.1004-4051.2000.02.012
ZHU Jianming,XU Bingye,REN Tiangui. Coordination between primary and secondary support zones of drifts surrounding rock[J]. China Mining Magazine,2000,9(2):41−44. doi: 10.3969/j.issn.1004-4051.2000.02.012
|
| [36] |
赵光明,张小波,王 超,等. 软弱破碎巷道围岩深浅承载结构力学分析及数值模拟[J]. 煤炭学报,2016,41(7):1632−1642.
ZHAO Guangming,ZHANG Xiaobo,WANG Chao,et al. Mechanical analysis and numerical simulation for deep and shallow bearing structures of soft and broken roadway surrounding rock[J]. Journal of China Coal Society,2016,41(7):1632−1642.
|
| [37] |
麦倜曾,张玉军. 锚固岩体力学性质的研究[J]. 工程力学,1987(1):106−116.
MAI Tizeng,ZHANG Yujun. Research of the bolted rocks statical behavior[J]. Engineering Mechanics,1987(1):106−116.
|
Supported by: Beijing Renhe Information Technology Co., Ltd. 
DownLoad: