Gold Science and Technology
img

Wechat

Adv. Search
Online Submission Peer Review Office Work

Gold Science and Technology ›› 2020, Vol. 28 ›› Issue (2): 238-245.doi: 10.11872/j.issn.1005-2518.2020.02.120

• Mining Technology and Mine Management • Previous Articles    

Study on Deformation Failure Characteristics and Support Methods in Broken Rock Mass Roadway Under High Geo-stress

Guang LI1,2,3(),Fengshan MA1,2(),Jie GUO1,2,Haijun ZHAO1,2,Yongyuan KOU4,Jian LAN4,Jintian ZHAO4   

  1. 1. Key Laboratory of Shale Gas and Geoengineering，Institute of Geology and Geophysics，Chinese Academy of Sciences，Beijing 100029，China
    2. Institutions of Earth Science，Chinese Academy of Sciences，Beijing 100029，China
    3. University of Chinese Academy of Sciences，Beijing 100049，China
    4. Jinchuan Group Co. ，Ltd，Jinchang 737100，Gansu，China
  • Received:2019-07-01 Revised:2019-11-23 Online:2020-04-30 Published:2020-05-07
  • Contact: Fengshan MA E-mail:liguang@mail.iggcas.ac.cn;fsma@mail.iggcas.ac.cn

RichHTML

6

PDF (PC)

683

Abstract:

With the rapid economic development，the status of mineral resources in the national economy and the demand for mineral resources has been increasing.In the mining production of these resources，it is an important task to ensure enduring and effective supports，which directly affect the safe production and sustainable development of the mine.Controlling roadway deformation by using appropriate support measures has become a critically important area of focus in the study of rock mechanics and mining.Because the rocks have experienced complex high stresses for a long period of time，the physical and mechanical properties of deep rock masses can change dramatically and the deformation failure modes are significantly different from those in shallow environments.Severe deformations and failures may occur due to high ground stress a short time after roadway excavations，and these may incur large repair costs that seriously hinder the baseline economic development of a mining area.The Jinchuan Mine，the largest nickel production base in China，is located in Jinchang City，Gansu Province.It is a large and complex deposit with high ground stress，a deeply buried ore body，and broken rocks.Due to its extremely complex regional geological background，special engineering geological environment，and distinctive rock mechanics，the Jinchuan Mine has attracted the attention of researchers and experts at home and abroad.Based on the special geological conditions of high-stress and fractured surrounding rock in Jinchuan No.2 mining area，field investigations and numerical simulations were carried out to study the deformation failure characteristics of the roadway in the study area and the effects of 8 different support methods.The results show that：（1）The deformation failure types of roadway in the study area can be divided into six types，including unsymmetrical pressure，roof falling，side cracking，floor heaving，side cracking and rib spalling which is the most common one；（2）The main features of the roadway deformation include large deformation，prominent time effect and the maximum principal stress plays a dominate role.（3）Adding U-shape steel，supplementing bottom support，increasing the length of the bolts，and reducing the distance between the bolts all can improve the support effect to different degrees.The effects of supplementing U-shape steel and bottom bolt-mesh-anchor support are the most significant，which can reduce the roadway deformation and plastic zone by about 70%.Increasing bolt length can control the deformation and overall stability of the roadway better，but the optimization effect is not significant.Reducing the spacing between bolts is beneficial to control the deformation and plastic zone on each part of the roadway.The dense arrangement of bolts can effectively improve the integrity of surrounding rock，and the supporting effect is better after reducing the row spacing of bolts.The aim of the research is providing a reference for other engineering solutions under similar geological conditions.

Key words: high geo-stress, broken rock mass, FLAC3D, field investigation, roadway deformation failure, support methods, Jinchuan mine

CLC Number: 

  • TD353

Fig.1

Geological map of Jinchuan Mine"

Fig.2

Deformation failure modes in the study area"

Fig.3

Schematic of numerical model"

Fig.4

Numerical simulation results of the no supporting condition"

Table 1

Comparision of numerical simulation results of different support methods"

编号 锚杆长度/m 间排距/m 底部支护 刚性支护 两帮移近量/cm 顶板下沉量/cm 底板隆起量/cm 塑性区面积/m2
1 2.25 0.5×1.0 - U型钢拱架 72.76 15.74 111.94 600
2 2.25 0.5×1.0 - - 184.91 42.57 133.31 1 600
3 2.25 0.5×1.0 喷锚网 - 44.76 16.90 30.15 520
4 2.25 0.5×1.0 喷锚网 U型钢拱架 15.80 5.72 7.95 240
5 2.25 1.0×1.0 喷锚网 - 52.56 20.53 35.47 1 200
6 3.00 1.0×1.0 喷锚网 - 38.17 23.13 29.63 850
7 2.25 0.5×2.0 喷锚网 - 66.98 28.53 42.90 2 020
1 何满潮，谢和平，彭苏萍，等 .深部开采岩体力学研究[J].岩石力学与工程学报，2005，24（16）：2803-2813.
He Manchao ， Xie Heping ， Peng Suping ，et al .Study on rock mechanics in deep mining engineering[J].Chinese Journal of Rock Mechanics and Engineering，2005，24（16）：2803-2813.
2 Gale W J ， Fabjanczyk M W ， Terrant G C .Optimization of reinforcement design of coal mine roadways[C] //Proceeding of 11th Conference on Ground Control in Mining，Wollonong，Australia.Publ Parkville：AuslMM，1992：212-219.
3 Hoek E ， Brown E T .Underground excavations in rock[R].London：Institution of Mining and Metallurgy，1980.
4 Hudson J A .Rock Engineering Systems：Theory and Practice[M].New York：Ellis Horwood，1992.
5 于学馥，郑颖人，刘怀恒 .地下工程围岩稳定分析[M].北京：煤炭工业出版社，1983.
Yu Xuefu ， Zheng Yingren ， Liu Huaiheng .Analysis of Surrounding Rock Stability in Underground Engineerings[M].Beijing：China Coal Industry Publishing House，1983.
6 余伟健，吴根水，安百富，等 .裂隙岩体巷道大变形特征与稳定性控制[J].采矿与安全工程学报，2019，36（1）：103-111.
Yu Weijian ， Wu Genshui ， An Baifu ，et al .Large deformation characteristics and stability control of roadway with fractured rock mass[J].Journal of Mining and Safety Engineering，2019，36（1）：103-111.
7 Shen B T .Coal mine roadway stability in soft rock：A case study[J].Rock Mechanics and Rock Engineering，2014，47（6）：2225-2238.
8 Reed G ， Mctyer K ， Frith R ，et al .An assessment of coal pillar system stability criteria based on a mechanistic evaluation of the interaction between coal pillars and the over burden[J].International Journal of Mining Science and Technology，2017，27（1）：9-15.
9 张辉，李国盛，蒋帅旗 .超千米深井巷道围岩变形破坏时空演化规律实验研究[J].实验力学，2018，33（6）：979-986.
Zhang Hui ， Li Guosheng ， Jiang Shuaiqi .Time-space evolution pattern simulation experiment of surrounding rock deformation and destruction for super kilometer deep shaft roadway[J].Journal of Experimental Mechanics，2018，33（6）：979-986.
10 孙晓明，苗沛阳，申付新，等 .不同应力状态下深井水平层状软岩巷道底鼓机理研究[J].采矿与安全工程学报，2018，35（6）：1099-1106.
Sun Xiaoming ， Miao Peiyang ， Shen Fuxin ，et al .Study on floor heave mechanism of horizontal layered soft rock roadway in deep well under different stress states[J].Journal of Mining and Safety Engineering，2018，35（6）：1099-1106.
11 王春，王成，熊祖强，等 .动力扰动下深部出矿巷道围岩的变形特征[J].黄金科学技术，2019，27（2）：232-240.
Wang Chun ， Wang Cheng ， Xiong Zuqiang ，et al .Deformation characteristics of the surrounding rock in deep mining roadway under dynamic disturbance[J].Gold Science and Technology，2019，27（2）：232-240.
12 康红普，范明建，高富强，等 .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，2015，34（11）：2227-2241.
Kang Hongpu ， Fan Mingjian ， Gao Fuqiang ，et al .Deformation and support of rock roadway at depth more than 1000 meters[J].Chinese Journal of Rock Mechanics and Engineering，2015，34（11）：2227-2241.
13 赵飞 .强动压高水平应力巷道围岩控制技术[J].煤矿安全，2019，50（4）：81-84，89.
Zhao Fei .Control technology of roadway surrounding rock with strong dynamic pressure and high horizontal stress[J].Safety in Coal Mines，2019，50（4）：81-84，89.
14 李光，马凤山，郭捷，等 .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，2017，25（5）：57-66.
Li Guang ， Ma Fengshan ， Guo Jie ，et al .Application of steel tube confined concrete support in Jinchuan mine［J］.Gold Science and Technology，2017，25（5）：57-66.
15 李光，马凤山，刘港，等 .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，2018，26（5）：605-614.
Li Guang ， Ma Fengshan ， Liu Gang ，et al .Study on supporting parametric optimizing design and evaluate supporting effect of deep roadway in Jinchuan Mine[J].Gold Science and Technology，2018，26（5）：605-614.
16 马凤山，卢蓉，郭捷，等 .金川二矿区大体积充填体变形的三维数值模拟[J].工程地质学报，2019，27（1）：14-20.
Ma Fengshan ， Lu Rong ， Guo Jie ，et al .Deformation analysis of large backfill by three-dimensional numerical simulation in No.2 zone of Jinchuan Mine[J].Journal of En-gineering Geology，2019，27（1）：14-20.
17 吴满路，马宇，廖椿庭，等 .金川二矿深部1 000 m中段地应力测量及应力状态研究[J].岩石力学与工程学报，2008，27（增2）：3785-3790.
Wu Manlu ， Ma Yu ， Liao Chunting ，et al .Study on recent state of stress in depth 1 000 m of Jinchuan mine[J].Chinese Journal of Rock Mechanics and Engineering，2008，27（Supp.2）：3785-3790.
18 杨志强，高谦，王玉山，等 .特大型镍矿工程地质与岩石力学[M].北京：科学出版社，2013.
Yang Zhiqiang ， Gao Qian ， Wang Yushan ，et al .Engineering Geology and Rock Mechanics of An Extra Large Nickel Ore[M].Beijing：Science Press，2013.
19 高启波，贾琪 .高应力破碎岩体中巷道支护技术的应用与研究［J］.有色金属（矿山部分），2016，68（3）：70-74，82.
Gao Qibo ， Jia Qi .Application and research of the supporting technology in high-stress fractured rock roadway［J］.Nonferrous Metals （Mining Section），2016，68（3）：71-74，82.
20 张鹏强，李凤，朱大铭 .金属矿山深部巷道稳定性测试与分析［J］.世界有色金属，2018，1（1）：157-159.
Zhang Pengqiang ， Li Feng ， Zhu Daming .Measurement and analysis of deep roadway stability in metal mine［J］.World Nonferrous Metals，2018，1（1）：157-159.
[1] Jianhua HU,Shuohan XU,Zelin XU,Lei HAN. Numerical and Entropy Coupling Optimization of Mining Methods in Urban Underground Mines [J]. Gold Science and Technology, 2019, 27(4): 513-521.
[2] Guang LI,Fengshan MA,Gang LIU,Jie GUO,Huigao GUO,Yongyuan KOU. Study on Supporting Parametric Optimizing Design and Evaluate Supporting Effect of Deep Roadway in Jinchuan Mine [J]. Gold Science and Technology, 2018, 26(5): 605-614.
[3] LI Guang，MA Fengshan，GUO Jie，LU Rong，CHEN Zhongjie，KOU Yongyuan. Application of Steel Tube Confined Concrete Support in Jinchuan Mine [J]. Gold Science and Technology, 2017, 25(5): 57-66.
[4] ZHAO Guoyan，HOU Jun，ZHANG Xiaorui，LI Diyuan，WANG Tao. Study on the Mechanical Properties of the Phosphogypsum Paste Filling Material [J]. Gold Science and Technology, 2016, 24(5): 7-12.
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