屯宝煤矿综放巷道深部围岩动态变形与失稳监测

doi:10.11799/ce201412025

Abstract

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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TD353

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http://www.coale.com.cn/EN/Y2014/V46/I12/75

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

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