煤炭工程 ›› 2014, Vol. 46 ›› Issue (12): 75-77.doi: 10.11799/ce201412025

• 研究探讨 • 上一篇    下一篇

屯宝煤矿综放巷道深部围岩动态变形与失稳监测

索振永   

  1. 西安科技大学能源学院
  • 收稿日期:2014-01-13 修回日期:2014-03-05 出版日期:2014-12-12 发布日期:2014-12-10
  • 通讯作者: 索振永 E-mail:suozy2000@126.com

The dynamic monitoring for deformation and destabilization of entries’ country rock with deep mechanized caving in Tunbao Colliery

  • Received:2014-01-13 Revised:2014-03-05 Online:2014-12-12 Published:2014-12-10

摘要:

摘要:综放巷道围岩动态变形失稳极易造成重大人员伤亡事故的发生。对顶板岩层移动进行监测,提前预报顶板失稳事故,为人员撤离和巷道加强支护赢取时间,可有效地减少经济损失。针对屯宝煤矿1193工作面综放巷道围岩变形严重,顶板下沉量大,局部顶板冒落等问题,采用多点位移计对综放巷道围岩动态变形实时监测,分析顶板岩层变形及失稳特征。结果表明:顶板上覆岩层在失稳前均出现任意相邻两个监测基点位移差h持续增加的现象,并辅于现场实践验证,提出采用多点位移计基点位移差h的持续增加作为顶板围岩失稳的前兆,为矿井安全高效生产提供合理可靠的依据。

关键词: 关键词:综放巷道围岩, 顶板失稳, 相对位移量

Abstract:

Abstract:Dynamic deformation and destabilization of entries’ country rock is a key factor to cause a plethora of serious causalities in situ excavation. In order to decrease economical losses and provide more feasible time for enforced supporting and staff withdrawing, it is necessary to efficiently monitor roof strata movement with preventing the roof destabilization happening. No.1193 mechanized caving stope in Tunbao Colliery as the study research where country rocks of the entries deform obviously with large roof deflection, the multi-point extensometer was adopted for in situ monitoring of dynamic deformation and destabilization of entries’ country rock and the relative information would be analyzed characteristics of deformation and destabilization. All data indicate that the displacement difference h of random two adjacent monitoring basic points would increase continuously prior to the destabilization of overlying strata. After field verification, the phenomena could adopt as the precursor for roof destabilization, which is prerequisites for safety and efficient coal extraction.

Key words: Key words: Country rock of mechanized caving, roof destabilization, relative displacement

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