Study on the method of roadway cooperative anchor support#br#
based on rock mass safety factor
LI Gan1，TAO Zhigang2，SUN Xiaoming2，ZHU Chun3
(1. Institute of Rock Mechanics，School of Civil and Environmental Engineering，Ningbo University，Ningbo，Zhejiang 315000，China；2. State Key Laboratory for GeoMechanics and Deep Underground Engineering，China University of Mining and Technology(Beijing)，Beijing 100083，China；3. School of Earth Science and Engineering，Hohai University，
Nanjing，Jiangsu 210000，China)
Abstract：In order to solve the problem of selecting the parameters of anchoring support in coal mine caverns，a method for selecting support parameters based on the distribution characteristics of surrounding rock plastic zone under different safety factors is proposed. Through the discrete element numerical simulation technology，the cohesion and internal friction angle in the parameters of rock block and structural plane are assigned and calculated according to the reduction coefficient. The range of surrounding rock instability region under different safety factors is obtained. According to the support and the actual requirements of the engineering，the relationship between the position of the anchorage section and the safety factor is analyzed，to achieve collaborative and quantitatively support parameters. The results show that according to the strength reduction method，the risk areas of complex caverns such as roadway intersections can be effectively analyzed，and the distribution characteristics of the safety factor of surrounding rocks can be obtained. In the support design scheme，the anchorage section of the short bolt should be ensured in the area with a safety factor greater than 1. For important parts such as the top of the roadway and the waist of the two sides，the anchoring end of the long anchor cable is set in the area with a safety factor greater than 2. The middle partition wall adopts double control anchor cables，and its reinforcement range is the area with a safety factor less than 1.3. Under the reinforcement of cooperative support，the measured maximum deformation value of the surrounding rock of the intersection tunnel is 2.9 cm，the maximum deformation value of the rectangular mining roadway is 27.5 cm，and the maximum error between the numerical calculation result and the field measurement result is only 0.5 cm，which shows that the support design method is highly reliable，and provides a scientific basis for the quantitative design of the support parameters of the coal mine tunnel.
李 干1，陶志刚2，孙晓明2，朱 淳3. 基于岩体安全系数的巷道协同锚固支护方法研究[J]. 岩石力学与工程学报, 2023, 42(6): 1395-1404.
LI Gan1，TAO Zhigang2，SUN Xiaoming2，ZHU Chun3. Study on the method of roadway cooperative anchor support#br#
based on rock mass safety factor. , 2023, 42(6): 1395-1404.
[1] ZIENKIEWICZ O C，HUMPHESON C，LEWIS R W. Associated and non-associated visco-plasticity and plasticity in soil mechanics[J]. Géotechnique，1975，25(4)：671–689.
[2] 徐立功，李 浩，陈祥林，等. 锚杆参数对围岩稳定性影响的数值分析[J]. 岩土工程学报，2010，32(增2)：249–252.(XU Ligong，LI Hao，CHEN Xianglin，et al. Numerical analysis on the impact of rock bolt parameters on stability of surrounding rock[J]. Chinese Journal of Geotechnical Engineering，2010，32(Supp.2)：249–252.(in Chinese))
[3] 黄 阜，杨小礼，赵炼恒，等. 基于非线性破坏准则和强度折减法的浅埋隧道安全系数上限解[J]. 工程力学，2013，30(12)：160–166.(HUANG Fu，YANG Xiaoli，ZHAO Lianheng，et al. Upper Bound solutions of safety factor for shallow tunnels subjected to nonlinear failure criterion and strength reduction method[J]. Engineering Mechanics，2013，30(12)：160–166.(in Chinese))
[4] 李 杰，司君岭，仲 恒，等. 基于强度折减法的双孔大跨隧道围岩稳定性研究[J]. 土木工程学报，2017，50(增2)：198–202.(LI Jie，SI Junling，ZHONG Heng，et al. A study of the rock mass stability of two-tube large-span tunnels based on strength reduction method[J]. China Civil Engineering Journal，2017，50(Supp.2)：198–202.(in Chinese))
[5] ZHANG W，GOH A T C. Reliability assessment on ultimate and serviceability limit states and determination of critical factor of safety for underground rock caverns[J]. Tunnelling and Underground Space Technology，2012，32：221–230.
[6] GOH A T C，ZHANG W. Reliability assessment of stability of underground rock caverns[J]. International Journal of Rock Mechanics and Mining Sciences，2012，55：157–163.
[7] SARI M. Two-and three-dimensional stability analysis of underground storage caverns in soft rock(Cappadocia，Turkey) by finite element method[J]. Journal of Mountain Science，2022，19(4)：1 182–1 202.
[8] JONG D Y，HAN U C，JANG U J，et al. Determination of safety factor for rock mass surrounding tunnel by sudden change of equivalent plastic strain in strength reduction method[J]. Geotechnical and Geological Engineering，2022，40：1–17.
[9] 刘泉声，雷广峰，彭星新，等. 锚杆锚固对节理岩体剪切性能影响试验研究及机制分析[J]. 岩土力学，2017，38(增1)：27–35.(LIU Quansheng，LEI Guangfeng，PENG Xingxin，et al. Experimental study and mechanism analysis of influence of bolt anchoring on shear properties of jointed rock mass[J]. Rock and Soil Mechanics，2017，38(Supp.1)：27–35.(in Chinese))
[10] 熊良宵，虞利军. 锚固岩体的单轴压缩力学特性及其各向异性特征分析[J]. 水文地质工程地质，2018，45(4)：7.(XIONG Liangxia，YU Lijun. Analyses of uniaxial compressive mechanical properties and anisotropic characteristics of anchored rock mass[J]. Hydrogeology and Engineering Geology，2018，45(4)：7.(in Chinese))
[11] YANG S Q，CHEN M，TAO Y. Experimental study on anchorage mechanical behavior and surface cracking characteristics of a non-persistent jointed rock mass[J]. Rock Mechanics and Rock Engineering，2021，54(3)：1 193–1 221.
[12] 程东幸，潘 炜，刘大安，等. 锚固节理岩体等效力学参数三维离散元模拟[J]. 岩土力学，2006，27(12)：2 127–2 132.(CHENG Dongxing，PAN Wei，LIU Daan，et al. 3DEC modeling of equivalent mechanical parameters in anchored jointed rock mass[J]. Rock and Soil Mechanics，2006，27(12)：2 127–2 132.(in Chinese))
[13] 李新平，王 涛，宋桂红，等. 锚固层状岩体的复合加固理论与数值模拟试验分析[J]. 岩石力学与工程学报，2006，25(增2)：3 654– 3 660.(LI Xinping，WANG Tao，SONG Guihong，et al. Study on composite anchoring theory and numerical simulation test on layered rocks[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(Supp.2)：3 654–3 660.(in Chinese))
[14] 赵光明，刘崇岩，孟祥瑞，等. 高应力巷道锚固复合承载体及其承载效应研究[J]. 采矿与安全工程学报，2021，38(1)：68–75.(ZHAO Guangming，LIU Chongyan，MENG Xiangrui，et al. The composite anchorage bearing structure in high stress roadway and Its load-bearing effect[J]. Journal of Mining and Safety Engineering，2021，38(1)：68–75.(in Chinese))
[15] 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)：1 009–1 019.(CHEN Dengguo，GAO Zhaoning，ZHAO Guangming，et al. Stability analysis of surrounding rock under anchorage mechanics effect[J]. Journal of China Coal Society，2020，45(3)：1 009–1 019.(in Chinese))
[16] DU S H，LI D Y，RUAN B，et al. Deformation and fracture of circular tunnels under non-tectonic stresses and its support control[J]. European Journal of Environmental and Civil Engineering，2020，26(5)：1 654– 1 677.
[17] 王洪涛，刘璐瑶，张建国，等. 基于Hoek-Brown强度参数的含顶煤巷道锚索支护力预测及应用[J]. 中国矿业大学学报，2022，51(2)：244–256.(WANG Hongtao，LIU Luyao，ZHANG Jianguo，et al. Prediction and application of anchor cable support force of roadway with top coal based on Hoek Brown strength parameter[J]. Journal of China University of Mining and Technology，2022，51(2)：244–256.(in Chinese))
[18] 侯公羽，梁金平，李小瑞. 常规条件下巷道支护设计的原理与方法研究[J]. 岩石力学与工程学报，2022，41(4)：691–711.(HOU Gongyu，LIANG Jinping，LI Xiaorui. Research on principles and methods of roadway support design under conventional conditions[J]. Chinese Journal of Rock Mechanics and Engineering，2022，41(4)：691–711.(in Chinese))
[19] 侯朝炯，勾攀峰. 巷道锚杆支护围岩强度强化机理研究[J]. 岩石力学与工程学报，2000，19(3)：342–345.(HOU Chaojiong，GOU Panfeng. Study on strengthening mechanism of surrounding rock strength of roadway bolt support[J]. Chinese Journal of Rock Mechanics and Engineering，2000，19(3)：342–345.(in Chinese))
[20] JING H W，YANG S Q，ZHANG M L，et al. An experimental study on anchorage strength and deformation behavior of large-scale jointed rock mass[J]. Tunnelling and Underground Space Technology，2014，43：184–197.
[21] 袁 维，郝笑甜，李小春，等. 一种考虑变形参数和强度参数协调折减的强度折减法研究[J]. 岩土力学，2016，37(7)：2 096–2 100. (YUAN Wei，HAO Xiaotian，LI Xiaochun，et al. A strength reduction method considering reduction of strength parameters coordinating with deformation parameters[J]. Rock and Soil Mechanics，2016，37(7)：2 096–2 100.(in Chinese))
[22] 贾 超，李 朋，张强勇. 基于强度折减法的盐岩地下储库腔群安全稳定性研究[J]. 岩石力学与工程学报，2012，31(增2)：3 666–3 672.(JIA Chao，LI Peng，ZHANG Qiangyong. Security and stability research for salt-rock gas torage caverns group based on strength reduction method[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(Supp.2)：3 666–3 672.(in Chinese))
[23] HOEK E. Hoek-Brown failure criterion-2002 edition[C]// Proceedings of the Fifth North American Rock Mechanics Symposium. [S. l.]：[s. n.]，2002：18–22.
[24] HOEK E，DIEDERICHS M S. Empirical estimation of rock mass modulus[J]. International Journal of Rock Mechanics and Mining Sciences，2006，43(2)：203–215.
[25] HOEK E，BROWN E T. The Hoek-Brown failure criterion and GSI–2018 edition[J]. Journal of Rock Mechanics and Geotechnical Engineering，2019，11(3)：445–463.
[26] WEI Y，CHEN Q，HUANG H，et al. Study on creep models and parameter inversion of columnar jointed basalt rock masses[J]. Engineering Geology，2021，290：106206.
[27] ZHANG Y，SU G，LIU B，et al. A novel displacement back analysis method considering the displacement loss for underground rock mass engineering[J]. Tunnelling and Underground Space Technology，2020，95：103141.
[28] ZHUANG D Y，MA K，TANG C A，et al. Mechanical parameter inversion in tunnel engineering using support vector regression optimized by multi-strategy artificial fish swarm algorithm[J]. Tunnelling and Underground Space Technology，2019，83：425–436.
2023, Vol. 42 
