东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2013, Vol. 34 ›› Issue (8): 1179-1183.DOI: -

• 资源与土木工程 • 上一篇    下一篇

爆破开挖扰动作用下深埋隧洞的微震分布规律

赵周能1，冯夏庭1,2，焦凯3，陈天宇1   

  1. (1.东北大学资源与土木工程学院，辽宁沈阳110819；2.中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室，湖北武汉430071；3.雅砻江流域水电开发有限公司，四川成都610051)
  • 收稿日期:2012-12-19 修回日期:2012-12-19 出版日期:2013-08-15 发布日期:2013-03-22
  • 通讯作者: 赵周能
  • 作者简介:赵周能(1976-)，男，广西桂林人，东北大学博士研究生；冯夏庭(1964-)，男，安徽潜山人，东北大学教授，博士生导师.
  • 基金资助:
    国家重点基础研究发展计划项目(2010CB732006).

Microseismic Event Distribution in Deep Tunnels Under the Disturbance of Blasting Excavation

ZHAO Zhouneng1， FENG Xiating1,2， JIAO Kai3， CHEN Tianyu1   

  1. 1. School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China; 2. State Key Laboratory of Geomechanics and Geotechnical Engineering， Institute of Rock and Soil Mechanics， Chinese Academy of Sciences， Wuhan 430071， China; 3. Yalong River Hydropower Development Co.， Ltd.， Chengdu 610051， China.
  • Received:2012-12-19 Revised:2012-12-19 Online:2013-08-15 Published:2013-03-22
  • Contact: ZHAO Zhouneng
  • About author:-
  • Supported by:
    -

RichHTML

0

PDF (PC)

593

摘要： 基于地应力高、开挖断面大、日炮次多、爆破扰动强的施工环境下的微震监测数据，研究了爆破开挖扰动作用下深埋隧洞的微震分布规律.结果表明:爆破开挖卸荷影响范围内的微震活动既与围岩应力重分布有关，又与爆破扰动密不可分；爆破扰动是开挖卸荷影响范围之外微震活动的主要诱因，是时滞型岩爆孕育发生的重要影响因素之一；微震分布区域与爆破地点的相对位置及距离密切相关.研究结果可为钻爆法开挖下的隧洞岩爆防治提供参考.

关键词: 爆破扰动, 深埋隧洞, 微震分布, 岩爆, 围岩应力

Abstract: Based on the monitored microseismic data in situations with high geostress， large diameter， frequent daily blasting and strong blasting disturbance， the distribution of microseismic events occurring in the deep tunnels of JinpingⅡhydropower station under the action of blasting disturbance was investigated. The results show that the microseismic activities in the areas affected by excavation unloading are closely related to surrounding rock stress redistribution and blasting disturbance. And blasting disturbance is a main factor of triggering microseismic activities outside the influence range of excavation unloading; hence it is one of important factors for triggering the timedelayed rockburst. Moreover， the distribution area of microseismic events is associated with its distance from the sites where blasting events happen and the relative location between them. The results achieved can provide the reference for the rockburst prevention during deep tunnel excavation by drillandblast technique.

Key words: blasting disturbance, deep tunnel, microseism distribution, rockburst, surrounding rock stress

中图分类号: