Gold Science and Technology
img

Wechat

Adv. Search
Online Submission Peer Review Office Work

Gold Science and Technology ›› 2022, Vol. 30 ›› Issue (3): 438-448.doi: 10.11872/j.issn.1005-2518.2022.03.128

• Mining Technology and Mine Management • Previous Articles    

Deep Roadway Support and Its Effect Evaluation Under Excavation Unloading Disturbance

Liqiang CHEN(),Guoyan ZHAO(),Yang LI,Wenjie MAO,Chengkai DANG,Boyang FANG   

  1. School of Resources and Safety Engineering，Central South University，Changsha 410083，Hunan，China
  • Received:2021-09-16 Revised:2021-12-30 Online:2022-06-30 Published:2022-09-14
  • Contact: Guoyan ZHAO E-mail:1976596117@qq.com;gy.zhao@263.net

RichHTML

1

PDF (PC)

181

Abstract:

Roadway support work is very important to ensure the safety and sustainable development of enterprise production，reasonable support can not only ensure the stability of the roadway to the greatest extent，but also greatly save the cost of support.Especially in recent years，with the increase of mining depth，there is a high stress environment caused by excavation unloading and mining impact the deep roadway，which greatly increases the probability of safety hazards such as roof caving，gangstay or even collapse，so it is more necessary to optimize governance and time-effective support.In order to solve the serious catastrophic damage of the surrounding rock and the near failure of the supporting structure in the deep roadway of a gold mine， the excavation damage of deep roadway under the coupling effect of excavation and mining unloading was studied，and the deformation control scheme of surrounding rock was proposed.FLAC3D was used to conduct an in-depth discussion on the support effect of the supporting scheme from three aspects of stress concentration-migration evolution，displacement field and plastic zone distribution characteristics，and the real-time in-situ data obtained from field engineering experiment monitoring were analyzed and compared.The results show that under the disturbance of excavation in the deep fractured roadway，the plastic zone is obviously expanded，the stress con-centration degree at both shoulders and the bottom corner of the side wall is high，the fracture damage pressure on the floor is the largest，and the high stress migrates to the deep part of the roadway.Finally，the influence of roadway excavation stays at about 2~4 times the radius.At the same time，according to the measured data，the stress of the surrounding rock of the roadway increases continuously during the unloading disturbance process of the roadway excavation，which indicates that the excavation disturbance in the adjacent stope will have a grea-ter impact on the stability of the roadway.Before and after the support is applied，the average growth rate of the roadway surrounding rock stress decreases from 0.096 to 0.008.At this time，as the amount of ore continues to increase，the stress in the surrounding rock remains relatively stable.It is verified that the surrounding rock control scheme of shotcrete-anchor-net combined support instead of the traditional U-shaped steel frame and bolt support as reinforcement support for this engineering environment can better play the fragmented surrounding rock.The self-bearing capacity of the roadway effectively resists the deformation and damage of the roadway，and has a very good supporting effect.It can provide reasonable suggestions for the design of surrounding rock deformation and support for deep mine roadways with similar engineering environments.

Key words: deep mining, numerical simulation, aging support, evaluation effect, stress monitoring, roadway stability

CLC Number: 

  • TD353

Table 1

Physical and mechanical parameters of rock mass in a gold mine"

岩石名称容重/（g·cm-3）单轴抗拉强度/MPa单轴抗压强度/MPa弹性模量/GPa内摩擦角/（°）内聚力/MPa泊松比
花岗岩2.598.5676.8521.1848.3535.780.23
石英脉2.613.3525.7622.5444.623.390.25
黑云斜长片麻岩2.744.8884.2529.6445.3231.260.26

Fig.1

Failure modes of roadway and surrounding rock under different stress environments"

Fig.2

Different types of roadway support failure"

Fig.3

Cross section of roadway support scheme"

Fig.4

Cloud diagram of displacement of roadway under different supporting conditions"

Fig.5

Cloud diagram of maximum principal stress of roadway under different supporting conditions"

Fig.6

Cloud diagram of distribution of roadway plastic zone under different supporting conditions"

Fig.7

Installation situation of on-site monitoring test"

Fig.8

Monitoring after roadway support"

Fig.9

Stress change curve of engineering measurement"

Fig.10

Comparison analysis curve of surrounding rock stress"

An Y P， Zhang N， Zhao Y M，et al，2021.Field and numerical investigation on roof failure and fracture control of thick coal seam roadway［J］.Engineering Failure Analysis，128：105 594.
Fan Lei， Wang Weijun， Yuan Chao，2020.Evaluation method for supporting effect of inclined soft rock roadway based on extenics［J］.Journal of Mining and Safety Engineering，37（3）：498-504.
Guo Ping， Shen Dafu，2021.Optimization design and numerical simulation of supporting scheme for deep mine roadway ［J］.Mining Safety and Environmental Protection，48（4）：87-91.
He Manchao，1993. Introduction to Soft Rock Roadway Engineering［M］.Beijing：China University of Mining and Technology Press.
He Manchao， Sun Xiaoming，2002.Soft Rock Engineering Mechanics［M］. Beijing：Science Press.
Hui Qiang， Zhang Jun， Jiang Haibo，2021.Study on the characteristics and distribution laws of plastic zone induced by deep-buried high-geostress hydraulic tunnelling in jointed rock mass［J］.Modern Tunnelling Technology，58（4）：86-94.
Kang Hongpu， Fan Mingjian， Gao Fuqiang，et al，2015.Deformation and support of rock roadway at depth more than 1000 meters［J］. Chinese Journal of Rock Mechanics and Engineering，34（11）：2227-2241.
Li G， Ma F S， Guo J，et al，2020.Study on deformation failure mechanism and support technology of deep soft rock roadway［J］.Engineering Geology，264：105262.
Li Guang， Ma Fengshan， Guo Jie，et al，2017. Application of steel tube confined concrete support in Jinchuan mine［J］.Gold Science and Technology，25（5）：57-66.
Li Guang， Ma Fengshan， Liu Gang，et al，2018. Study on supporting parametric optimizing design and evaluate supporting effect of deep roadway in Jinchuan mine［J］.Gold Science and Technology，26（5）：605-614.
Li Jing， Hu Bin， Liu Yanzhang，et al，2021.Improved catastrophe progression method for evaluating supporting effect of bolts in mining roadway［J］.China Safety Science Journal，31（3）：60-65.
Li Qiyue， Chen Liang， Fan Zuopeng，et al，2013. ARMA model and its application in prediction of underground engineering supporting effect［J］.Mining and Metallurgical Engineering，33（3）：8-12.
Liu Haiyan， Zuo Jianping， Liu Dejun，et al，2021. Optimization of roadway bolt support based on orthogonal matrix analysis［J］.Journal of Mining and Safety Engineering，38（1）：84-93.
Ni Haiming，2021.Application and safety evaluation of yielding support in deep high stress roadway［J］.Coal and Chemical Industry，44（1）：17-20.
Pan Rui， Wang Lei， Cai Yi，et al，2021.Analysis of flat roof stability in deep roadway and its repair control［J］. Journal of Mining and Safety Engineering，38（4）：756-765.
Pu Chunyan， Liu Bin， Li Zhongnan，et al，2021.Analysis of stress evolution characteristics of deep roadway excavation［J］.Metal Mine，50（2）：41-52.
Shen Yanmei， Wei Sijiang，2011.Fuzzy comprehensive evaluation of bolt support effects in deep-mining gateway［J］.Journal of Mining and Safety Engineering，28（4）：576-580.
Song Tao，2019.Study on Support Design and Effect Evaluation of S1201 Mining Roadway in Ningtiaota Coal Mine［D］.Xi’an：Xi’an University of Science and Technology.
Sun Qihao， Ma Fengshan， Wan Yang，et al，2021.Numerical simulations of excavation damage in deep roadways of Jinchuan mining area［J］.Journal of Engineering Geology，29（4）：1017-1027.
Tang B， Mathias Y， Cheng H，et al，2021.Numerical study and field performance of rockbolt support schemes in TBM-excavated coal mine roadways：A case study［J］.Tunnelling and Underground Space Technology，115：104053.
Wan Chuanchuan， Li Xibing， Ma Chunde，2012.Optimization of support technology for deep soft rock roadway based on field measurement of excavation damage［J］. Mining and Metallurgical Engineering，32（1）：12-16.
Wang G F， Li G， Dou L M，et al，2020.Applicability of energy-absorbing support system for rockburst prevention in underground roadways［J］.International Journal of Rock Mechanics and Mining Sciences，132：104396.
Wang Weijun， Han Sen， Dong Enyuan，2021. Boundary equation of plastic zone in roadway surrounding rocks considering supporting effect and its application［J］.Journal of Mining and Safety Engineering，38（4）：749-755.
Wang Xinfeng， He Yi， Lu Mingyuan，et al，2021.Study on deformation and failure characteristics of deep roadway surrounding rock under excavation unloading disturbance［J］.China Safety Science Journal，31（8）：83-90.
Xia Xicen，2021.Inverse Analysis of Tunnel Surrounding Rock Based on DE-BP Neural Network and Research of Support Parameters［D］.Dalian：Dalian University of Technology.
Xie Heping，2019. Research review of the state key research development program of China：Deep rock mechanics and mining theory ［J］.Journal of China Coal Society，44（5）：1283-1305.
Yu K P， Ren F Y， Puscasu R，et al，2020.Optimization of combined support in soft-rock roadway［J］.Tunnelling and Underground Space Technology，103：103502.
Zheng Keyue， Shi Chenghua， Lei Mingfeng，et al，2021.Stability analysis and support design optimization of large-deformation tunnels in structural fracture zones with high in-situ stresses considering loose effect［J］.Chinese Journal of Ro-ck Mechanics and Engineering，40（8）：1603-1613.
范磊，王卫军，袁超，2020.基于可拓学倾斜软岩巷道支护效果评价方法［J］.采矿与安全工程学报，37（3）：498-504.
郭平，沈大富，2021.深部巷道支护方案优化设计及数值模拟研究［J］.矿业安全与环保，48（4）：87-91.
何满潮，1993.软岩巷道工程概论［M］.北京：中国矿业大学出版社.
何满潮，孙晓明，2002.软岩工程力学［M］.北京：科学出版社.
惠强，张军，姜海波，2021. 深埋高地应力水工隧洞节理岩体开挖塑性区特征及分布规律研究［J］. 现代隧道技术，58（4）：86-94.
康红普，范明建，高富强，等，2015.超千米深井巷道围岩变形特征与支护技术［J］.岩石力学与工程学报，34（11）：2227-2241.
李光，马凤山，郭捷，等，2017.U钢管混凝土支架支护技术在金川矿山的应用［J］.黄金科学技术，25（5）：57-66.
李光，马凤山，刘港，等，2018.金川矿区深部巷道支护效果评价及参数优化研究［J］.黄金科学技术，26（5）：605-614.
李京，胡斌，刘艳章，等，2021.回采巷道锚杆支护效果评判的改进突变级数法［J］.中国安全科学学报，31（3）：60-65.
李启月，陈亮，范作鹏，等，2013.地下工程支护效果的ARMA预测模型及应用［J］.矿冶工程，33（3）：8-12.
刘海雁，左建平，刘德军，等，2021.基于正交矩阵分析的巷道锚杆支护优化［J］.采矿与安全工程学报，38（1）：84-93.
倪海明，2021.深部高应力巷道让压支护的应用及安全评价［J］.煤炭与化工，44（1）：17-20.
潘锐，王雷，蔡毅，等，2021.深部巷道平顶稳定性分析及返修控制研究［J］.采矿与安全工程学报，38（4）：756-765.
蒲春艳，刘滨，李中楠，等，2021. 深部巷道开挖应力演化特征分析［J］. 金属矿山，50（2）：41-52.
申艳梅，韦四江，2011.回采巷道锚杆支护效果模糊综合评判［J］.采矿与安全工程学报，28（4）：576-580.
宋涛，2019. 柠条塔煤矿S1201回采巷道支护设计及效果评价研究［D］.西安：西安科技大学.
孙琪皓，马凤山，万洋，等，2021.金川矿区深部巷道开挖损伤数值模拟研究［J］.工程地质学报，29（4）：1017-1027.
万串串，李夕兵，马春德，2012.基于围岩松动圈现场测试的深部软岩巷道支护技术优化［J］.矿冶工程，32（1）：12-16.
王卫军，韩森，董恩远，2021.考虑支护作用的巷道围岩塑性区边界方程及应用［J］.采矿与安全工程学报，38（4）：749-755.
王新丰，何毅，陆明远，等，2021.开挖卸荷扰动深部巷道围岩变形破坏特征研究［J］.中国安全科学学报，31（8）：83-90.
夏溪岑，2021. 基于DE-BP神经网络的隧道围岩反演分析及支护参数研究［D］.大连：大连理工大学.
谢和平，2019.深部岩体力学与开采理论研究进展［J］.煤炭学报，44（5）：1283-1305.
郑可跃，施成华，雷明锋，等，2021.考虑松动效应的高地应力构造破碎带隧道稳定性分析及大变形支护设计优化［J］.岩石力学与工程学报，40（8）：1603-1613.
[1] Lingzhi ZHONG,Xiancheng MAO,Zhankun LIU,Keyan XIAO,Chuntan WANG,Wu CHEN. Ore-controlling Effect of Structural Geometry Features in the Sanshandao Gold Belt，Jiaodong Peninsula，China： Insights from Numerical Simulation [J]. Gold Science and Technology, 2022, 30(3): 352-365.
[2] Weihua WANG,Yang LIU,Liwei ZHANG,Henggen ZHANG. Numerical Simulation of Homogeneous Rock Mass Damage Caused by Two-hole Simultaneous Blasting Based on RHT Model [J]. Gold Science and Technology, 2022, 30(3): 414-426.
[3] Xuan FU,Linqi HUANG,Jiangzhan CHEN,Yangchun WU,Xibing LI. Meeting the Challenge of High Geothermal Ground Temperature Environ-ment in Deep Mining—Research on Geothermal Ground Temperature Simula-tion Platform of Rock True Triaxial Testing Machine [J]. Gold Science and Technology, 2022, 30(1): 72-84.
[4] Dan HUANG,He CHEN,Zhijie ZHENG. Model of the Height of Overburden Fracture Zone Based on Void Conservation [J]. Gold Science and Technology, 2021, 29(6): 843-853.
[5] Yu TANG,Shaofeng WANG. Analysis on Rock Breakage Characteristic and Its Influence Factors of Conical Pick Under Uniaxial Confining Stress [J]. Gold Science and Technology, 2021, 29(5): 669-679.
[6] Hongwei DENG,Zhiming ZHONG,Guanglin TIAN. Numerical Simulation of Sectional Oxygen⁃Enrichment Ventilation in Plateau Mine [J]. Gold Science and Technology, 2021, 29(5): 698-708.
[7] Yue JING,Shaofeng WANG,Jintao LU. Thickness Prediction of the Excavation Damage Zone and Non-explosive Mechanized Mining Criterion [J]. Gold Science and Technology, 2021, 29(4): 525-534.
[8] Lulu XU,Qinli ZHANG,Ru FENG. Numerical Simulation of Backfill Strength Based on Optimization Results of Stope Structural Parameters [J]. Gold Science and Technology, 2021, 29(3): 421-432.
[9] Jingkai JIA,Gun HUANG,Long WANG,Qiang CHENG,Libing ZHEN. Study on a New Method of Weakening End Effect in Uniaxial Compression Test [J]. Gold Science and Technology, 2021, 29(3): 382-391.
[10] Jin HUANG,Kewei LIU,Shaohu JIN. Numerical Simulation Study of High-strength Projectile Penetrating White Granite Target [J]. Gold Science and Technology, 2021, 29(3): 411-420.
[11] Weihua WANG,Jie LUO,Tian LIU,Zhenyu HAN. Particle Flow Simulation on Influence of Joint Roughness Coefficient on Stress Wave Propagation and Specimens Failure [J]. Gold Science and Technology, 2021, 29(2): 208-217.
[12] Xuebin XIE,Shan GAO,Jiang GUO,Yongfei YE. Numerical Simulation Study on the Response Law of Pressure Arch Height of Deep-buried Tunnel Under Seismic Dynamic Load [J]. Gold Science and Technology, 2021, 29(2): 226-235.
[13] Peng JIN,Kewei LIU,Xudong LI,Jiacai YANG. Numerical Simulation Study of Crack Propagation in Deep Rock Mass Under Water-coupling Blasting [J]. Gold Science and Technology, 2021, 29(1): 108-119.
[14] Jianhua HU,Le PANG,Xueliang WANG,Minghua ZHENG. Optimization of Roadway Support Parameters in Soft Broken Sections Based on Orthogonal Test [J]. Gold Science and Technology, 2020, 28(6): 859-867.
[15] Chenglong WANG,Chenglu HOU,Shanghuan YANG,Xingdong ZHAO. Control Technology of High Stress Broken Surrounding Rock in Kilometer Deep Shaft [J]. Gold Science and Technology, 2020, 28(6): 885-893.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!

©2018 Gold Science and Technology　

Telephone：0931-8277791　

E-mail: hjkx@lzb.ac.cn Postcode：730000　

Powered by Beijing Magtech Co. Ltd

陇ICP备17001318号-1