Title of Paper:基于微震监测的地下水封石油洞库施工期围岩稳定性分析

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Date of Publication:2022-10-10

Journal:岩石力学与工程学报

Volume:35

Issue:7

Page Number:1353-1365

ISSN No.:1000-6915

Abstract:The real-time monitoring and analysis of the microseismic activities of
   the cave rocks of a large underground water-sealed oil storage cavern in
   Jinzhou during the disturbance caused by strong excavation were
   performed using the Canadian ESG monitoring system. The potential
   failure regions of the cave rocks within the scope of monitoring were
   identified. The initiation,development and agglomeration process of the
   rock micro-cracks during excavation were reproduced. The P wave velocity
   was determined to be 5 200 m/s with the error of source location less
   than 8 m within the scope of the sensor array. Micro-cracks of rocks
   within the scope were aggregated into two bands. One was located to the
   east of water curtain tunnel 6,in between the water curtain tunnels 1
   and 2,and had a low angle with the horizontal plane. The other was
   located in 2+40-2+60 mileage between the oil storage grotto 1-North and
   1-South,and shared the same distribution with the diabase dikes in the
   region. The microseismic monitoring system identified the condition of
   the weak structural surface like dikes. The strong excavation
   disturbance of the large section oil storage caverns and the release of
   large amount of energy led to theover damageof rock and resulted in a
   large number of micro-cracks. The research results proved the
   feasibility of applying the microseismic monitoring technology in the
   special rock mass structures like underground water-sealed oil storage
   caverns.

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