深部岩体质量分级Q系统的改进
投稿时间:2018-10-23  修订日期:2019-03-18  点此下载全文
引用本文:
摘要点击次数: 106
全文下载次数: 0
作者单位E-mail
谭文辉 北京科技大学 土木与资源工程学院 wenhui.t@ustb.edu.cn 
武洋帆 北京科技大学 土木与资源工程学院 cecilia_wyf@163.com 
刘景军 北京科技大学 土木与资源工程学院  
王鹏飞 北京科技大学 土木与资源工程学院  
中文摘要:岩体质量是复杂岩体工程地质特性的综合反映,是岩石工程稳定性判别和支护设计的基础。现有岩体质量分级方法大多基于浅部岩石工程得来,对深部岩体并不是很合适。本文在综合分析现有岩体质量分级方法的基础上,基于深部地下工程“高地应力、高温、高渗透压”的特点,考虑“三高”对围岩质量的影响,对传统Q系统方法进行了修正,建立了适合深部工程围岩质量评价的方法,并进行了工程应用研究,研究表明,考虑“三高”的Q系统分级的岩体比用常规Q方法分级等级一般要低一级,可见常规评价方法评价深部岩体质量存在安全隐患,必须进行修正。
中文关键词:岩体质量  分级方法  Q系统  深部岩体
 
An Improved Q-System for Deep Rock Mass Classification
Abstract:Aiming at the problem of supporting difficulties because of rock crusher in the second roadway, the displacement field, stress field and plastic zone of the original supporting plan was simulated, and the surrounding rock deformation and failure characteristics was analyzed. The result shows that the key factors affecting roadway strength is three-diameter ratio and anchor length. Reasonable three-diameter ratio can increased anchorage length; reasonable anchor length can increased anchorage depth. The paper put forward 6 optimization schemes combining theoretical calculation, and make numerical simulation for the 6 optimization schemes using FLAC3D. The result shows that the sixth scheme is the most optimal. Based on above researches, the optimal supporting parameters are proposed and applied in engineering practice with field condition. According to the in-situ monitor data, the new scheme can effectively control deformation of roadway surrounding rock, and improve the overall safety. The research results show that strengthen the support strength of sidewall and corner can improve the stability of roadway as they are the key support parts.
keywords:large section roadway  roadway support  three-diameter ratio  anchor length  numerical simulation
  查看/发表评论  下载PDF阅读器
设备展厅
您是第6139470位访问者  备案许可证编号:京ICP备13036454号
版权所有:《中国矿业》杂志社有限公司
地  址: 北京市朝阳区安定门外小关东里10号院东小楼 邮编:100029 电话:010-68332570 88374940 E-mail: zgkyzzs@163.com