煤炭工程 ›› 2020, Vol. 52 ›› Issue (4): 48-51.doi: 10.11799/ce202004010

• 生产技术 • 上一篇    下一篇

基于地音监测的近直立煤层冲击地压前兆特征研究

刘昆轮,闫瑞兵   

  1. 神华新疆能源有限责任公司
  • 收稿日期:2019-05-07 修回日期:2019-11-11 出版日期:2020-04-20 发布日期:2020-07-22
  • 通讯作者: 闫瑞兵 E-mail:543575653@qq.com

Study on the evolution law of acoustic emission prior to rockburst in the mining of an approximately vertical coal seam

  • Received:2019-05-07 Revised:2019-11-11 Online:2020-04-20 Published:2020-07-22
  • Contact: Yan RuiBing E-mail:543575653@qq.com

摘要: 为了解决近直立煤层冲击地压监测预警的难题,以乌东煤矿近直立煤层为工程背景,研究+450水平B3+6综放工作面历次冲击地压前后地音事件能量和频次的演化规律,识别冲击地压前兆信息。结果表明:冲击地压造成的巷道破坏位置主要集中在超前工作面0~200m,且B6巷破坏程度大于B3巷,破坏形式以帮鼓为主,冲击地压主要影响因素为B6巷顶板岩层以及B3+6和B1+2煤层之间的岩柱|在冲击地压发生前,地音事件活动性经历一个平静期向强烈期过渡的过程|地音活动性由平静向强烈突然转变的现象可以作为冲击地压前兆信息。

关键词: 地音监测, 近直立煤层, 冲击地压, 前兆信息

Abstract: In order to solve the problem about rockburst monitoring and early warning of an approximately vertical seam, the evolution law of the energy and frequency of acoustic emission events before and after rockburst was studied and precursor information of rockburst was recognized based on previous rockburst events of Wu Dong coal mine B3+6 working face in +450 level. The results show that before the occurrence of rockburst, the activity of acoustic emission events experienced a transition from a calm period to a strong period. The phenomenon of sudden changes in acoustic emission activity from calm to intense abruptness can be used as the precursor information of rockbrust.

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