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研究与探索

基于微震监测的深埋隧道岩爆预警研究

  • 黄玉仁 ,
  • 毛建喜 ,
  • 林朝阳 ,
  • 李庶林 ,
  • 胡静云
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  • (1. 厦门大学建筑与土木工程学院, 福建 厦门 361005; 2. 中铁二十四局集团有限公司, 福建, 福州 350013; 3.长沙矿山研究院有限责任公司, 湖南 长沙 410012)
黄玉仁(1966—),男,福建莆田人,1989年毕业于西南交通大学,桥梁工程专业,硕士,教授级高级工程师,现从事路桥、隧道及地下工程、铁道工程等技术工作。

收稿日期: 2014-04-27

  修回日期: 2014-05-22

  网络出版日期: 2014-08-11

Study on Rockburst Warning based on Microseismic Monitoring Technology in Deepburied Tunnels

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  • (1. School of Architectural and Civil Engineering,Xiamen University, Xiamen 361005, Fujian, China; 2. China Railway 24th Bureau Group Co., Ltd, Fuzhou 350013, Fujian, China; 3. Changsha Institute of Mining Research, Changsha 410012, Hunan, China)

Received date: 2014-04-27

  Revised date: 2014-05-22

  Online published: 2014-08-11

摘要

北武夷山高铁隧道是一座单洞双向隧道,隧道最大埋深达1 100 m,属于高地应力区。经岩爆倾向性研究,可能出现弱岩爆。为了预防岩爆造成人员伤亡和设备损坏,研究人员采用微震监测技术,在开挖同时配合微震监测,根据监测到的事件数和能量变化情况,对岩爆和片帮发生进行预警。当微震系统监测到的事件率和和能量率同时急剧增加时,说明岩体内部变化剧烈,发生岩爆等地质灾害的可能性大大增加。根据这一准则,研究人员成功预测了隧道开挖过程中的一次小型岩爆。研究成果如下: 1)总结了隧道施工中常见微震波形的特征; 2)佐证了事件率和相对能量释放率可以客观反映岩体内部剧烈变化的事实,对今后隧道等地下工程利用微震监测方法防治岩爆灾害具有重要意义。

关键词: 岩爆; 微震监测; 预警; 隧道

本文引用格式

黄玉仁 , 毛建喜 , 林朝阳 , 李庶林 , 胡静云 . 基于微震监测的深埋隧道岩爆预警研究[J]. 隧道建设, 2014 , 34(增刊) : 15 -19 . DOI: 10.3973/j.issn.1672-741X.2014.S.003

Abstract

Highspeed railway tunnel in northern Wuyi mountain is a single hole bidirectional tunnel, and the maximum depth of the tunnel is as deep as 1 100 m, so it belongs to high stress area. It may appear weak rockburst according to the study on the rockburse tendency. In this paper, researchers used microseismic monitoring technology to monitor the number of events and the change of energy, in order to forecast rockburst and spalling which can prevent injuries and equipment damage. According to the rule that when the event rate and energy rate increase violently, the possibility of rockburst becomes easy due to the violent change in the inside of rock, researchers forecast a small rockburst successfully. Study resutls are as follows: 1) The characteristics of common microseismic wave form in tunnel construction are summarized. 2) T fact that event rate and energy rate can objectively reflect the rapid changes of rock mass is testified. This is significant for the tunnels and other underground engineering.

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