基于广义 Hoek-Brown 准则的深埋硐室围岩塑性区位移分析

采矿与安全工程学报 ›› 2015, Vol. 32 ›› Issue (5): 778-785.

基于广义 Hoek-Brown 准则的深埋硐室围岩塑性区位移分析

1．安徽理工大学土木建筑学院，安徽淮南 232001；2．安徽大学资源与环境工程学院，安徽合肥 230039

收稿日期:2013-12-30 出版日期:2015-09-15 发布日期:2019-09-02
作者简介:蔡海兵(1980—)，男，安徽省太湖县人，博士，副教授，从事岩土与地下工程方面的研究。
基金资助:
国家自然科学基金项目(50874002)；安徽省高等学校省级自然科学研究项目(KJ2010B318，KJ2012A094)

Analysis on rock plastic zone displacement of deep buried underground chamber based on generalized Hoek-Brown criterion

Received:2013-12-30 Online:2015-09-15 Published:2019-09-02

摘要/Abstract

摘要： 将广义的 Hoek-Brown 准则采用无量纲量形式进行表示，在此基础上，建立了均匀应力场圆形硐室的弹塑性解析方法。并针对不同性质岩体，分为不考虑岩体剪胀和塑性区内的弹性变形、考虑岩体剪胀且塑性区内的弹性变形为常量、考虑岩体剪胀且塑性区内的弹性变形为变量这3 种情况，对深埋硐室围岩的塑性区位移进行了对比分析。分析结果表明：在考虑岩体剪胀且塑性区内的弹性变形为变量情况下，硐室围岩塑性区位移的计算结果最大。对于岩体质量差和一般的软岩硐室，应考虑岩体的剪胀特性和塑性区内的弹性变形，且塑性区内的弹性变形应为变量；而对于岩体质量好的硐室或者是硬岩硐室，则不必考虑岩体的剪胀特性和塑性区内的弹性变形。

关键词: Hoek-Brown 准则, 深埋硐室, 塑性区位移, 剪胀, 弹性变形

Abstract: Generalized Hoek-Brown criterion is indicated as a dimensionless quantity; on this basis, elasto-plastic analytical method of circular underground chamber in uniform stress field has been established. According to the following three kinds of circumstances: 1) without considering rock dilatancy and elastic deformation in plastic zone, 2) considering rock dilatancy and constant elastic deformation in plastic zone, 3) considering rock dilatancy and varied elastic deformation in plastic zone, surrounding rock plastic zone displacement of deep buried underground chamber has been comparatively analyzed for different quality rock mass. The results have shown that surrounding rock plastic zone displacement is the maximum under the circumstance of considering rock dilatancy and varied elastic deformation in plastic zone. For soft rock chamber in poor and average quality rock mass, rock dilatancy and varied elastic deformation in plastic zone must be considered in the process of analysis on surrounding rock plastic zone displacement. For chamber in good quality rock mass or hard rock chamber, rock dilatancy and elastic deformation in plastic zone may not have to be considered.

Key words: Hoek-Brown criterion, deep buried underground chamber, plastic zone displacement, dilatancy, elastic deformation

蔡海兵，程桦，荣传新. 基于广义 Hoek-Brown 准则的深埋硐室围岩塑性区位移分析[J]. 采矿与安全工程学报, 2015, 32(5): 778-785.

CAI Haibing，CHENG Hua，RONG Chuanxin. Analysis on rock plastic zone displacement of deep buried underground chamber based on generalized Hoek-Brown criterion[J]. Journal of Mining & Safety Engineering, 2015, 32(5): 778-785.

[1]	谷拴成，周攀，孙魏，胡春晖，李志，王超. 考虑剪胀与中间主应力的被锚巷道围岩稳定性分析[J]. 采矿与安全工程学报, 2019, 36(3): 429-436.
[2]	潘锐，王琦，王雷，李术才，何满潮，于恒昌，许英东，胥洪彬. 深井巷道锚注补强力学效应及支护参数研究[J]. 采矿与安全工程学报, 2018, 35(2): 267-276.