Recognition and Stability Analysis of Underground Tunnel Rock Mass Structural Plane Based on 3D Laser Scanning Point Cloud Data
Received date: 2021-06-05
Revised date: 2021-09-15
Online published: 2022-09-14
The surrounding rock of the underground tunnel is distributed with structural planes of different occurrences and sizes. The structural planes determine the deformation characteristics and stress-strain mode of the rock mass to a certain extent,which weaken the stability of the rock mass locally,which has a significant impact on the safety of the tunnel engineering. It is very necessary to carry out the engineering geological survey of the underground tunnel and the quantitative analysis of the rock mass structure. To get the structural plane information of the underground tunnel accurately and do stability analysis for the surrounding rock of the tunnel,a three-dimensional laser scanner was used to obtain the point cloud data of the surrounding rock structural plane in the 775 m level drift of the Dahongshan iron mine in Yunnan. A series of work such as correction,structure surface data extraction,point cloud splicing,filtering and thinning,etc.,carried out statistical analysis based on the processing results. According to this statistical result,the discrete element software 3DEC is used to establish the discrete structure network model and a coupling model of an underground tunnel,and numerical simulation of the instability probability of the tunnel under its own weight and blasting vibration is carried out. The results show that the 3D laser scanning technology can better obtain the rock mass discontinuities information of the drift,and the discrete block unit calculation software can further analyze the stability of the drift rock block. The self-stabilizing ability of the surrounding rock in the analyzed area is good,but the instability probability increases greatly under the influence of blasting vibration. The research result can provide theoretical guidance for the support design of the tunnel.
Jielin LI , Dewei BAI , Chengye YANG , Wei ZHANG , Xiaoping ZHANG . Recognition and Stability Analysis of Underground Tunnel Rock Mass Structural Plane Based on 3D Laser Scanning Point Cloud Data[J]. Gold Science and Technology, 2022 , 30(3) : 343 -351 . DOI: 10.11872/j.issn.1005-2518.2022.03.070
湖南生态修复成效显著,建成绿色矿山335家
9月1日,中共湖南省委宣传部召开生态文明建设专场新闻发布会,湖南省自然资源厅党组成员、副厅长覃佐彦介绍了党的十八大以来湖南生态保护修复工作和成效。
发布会指出,党的十八大以来,湖南围绕“一江一湖三山四水”总体格局,将生态保护修复作为重要内容纳入《湖南省“十四五”自然资源发展规划》,编制《湖南省国土空间生态修复规划(2021—2035年)》,在全国第一个发布省级“十四五”生态修复规划,积极指导、持续推进市县规划编制,坚持“山水林田湖草是生命共同体”理念,积极争取国家资金。
2018年申报实施湘江流域和洞庭湖生态保护修复工程试点,项目总投资79.13亿元,其中中央资金20亿元,省级资金19.62亿元。
2019年争取中央资金2.56亿元实施长江经济带废弃露天矿山生态修复工程。
2022年湖南又成功申报了洞庭湖区域山水林田湖草沙一体化保护和修复工程以及湘桂岩溶地资江沅江上游历史遗留矿山生态修复示范工程,总预算75.6亿元,其中获中央财政资金支持23亿元,省级配套资金7.85亿元。
同时,湖南省政府高位推动矿业转型绿色发展,全力推进绿色矿山建设,突出生态和安全2个关键,淘汰了一大批“散、小、乱、差、污”矿山,建成绿色矿山335家。砂石土矿专项整治三年行动计划圆满收官,全省砂石土矿由3 631个减少至983个,关闭退出矿山基本做到了矿权注销、设施拆除、生态修复“三到位”。
此外,严格落实牵头督导责任,积极落实长江经济带生态环境警示片披露问题、第二轮中央生态环境保护督察、污染防治攻坚战夏季攻势工作任务,认真开展省级督导和现场核查,实现各类生态环境问题督导全覆盖,重点问题重点督办,确保生态环境突出问题整改到位。
中国矿业网
http://www.goldsci.ac.cn/article/2022/1005-2518/1005-2518-2022-30-3-343.shtml
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
邓社根,沙荣华,瞿生军,2018.结构面网络模拟在边坡稳定性分析中的应用[J].中国战略新兴产业,10(2):67-68.
|
段磊,罗晓丰,彭学军,等,2020.三维激光扫描技术在隧道监控量测中的应用[J].工程技术研究,5(21):232-234.
|
范留明,黄润秋,丁秀美,2003.一种基于结构面密度的岩体结构均质区划分方法[J].岩石力学与工程学报,22(7):1132-1136.
|
李杰林,杨承业,彭朝智,等,2021.三维激光扫描技术在地下巷道岩体结构面识别的应用[J].黄金科学技术,29(2):236-244.
|
李明超,张野,周四宝,2018.基于岩体三维裂隙结构面网络模型的随机块体稳定分析[J].天津大学学报(自然科学与工程技术版),51(4):332-338.
|
李腾,张振花,石超,等,2017.基于蒙特卡洛方法的深部岩体结构面模拟[J].现代矿业,33(4):167-177.
|
刘欢,王立娟,裴尼松,等,2017.三维激光扫描技术在米仓山特长隧道施工中的可行性应用研究[J].测绘通报,9(1):83-86.
|
阮杰,张金龙,张成辉,等,2021.离散裂隙网络对岩体力学特性影响数值模拟研究[J].河北工程大学学报(自然科学版),38(1):40-46.
|
盛佳,万文,江飞飞,等,2021.基于AHP-3DEC的井筒保安矿柱稳定性综合评价[J].矿业研究与开发,41(5):28-33.
|
王辉,钱海涛,2005.节理化岩体结构面分布密度的确定方法及其应用[J].地球与环境,33(1):124-129.
|
薛秋池,赵其华,何云松,2016.岩体结构面网络模拟的改进与应用[J].岩土工程学报,38(7):1352-1356.
|
岳攀,钟登华,吴含,等,2016.基于LHS的坝基岩体三维裂隙网络模拟[J].水力发电学报,35(10):93-102.
|
张文,陈剑平,牛岑岑,等,2013.基于三维裂隙网络RQD的确定及最佳测线数量的研究[J].岩土工程学报,35(2):321-327.
|
周斌,何明卫,祝方才,等,2021.基于 3DEC 节理岩体隧道开挖与支护的数值模拟[J].湖南工业大学学报,35(3):11-18.
|
/
〈 |
|
〉 |