Stability Microseismic Monitoring Scheme and Field Application in Dabaoshan Goaf
The safety and stability of goaf in relation to the safety of mine production,it is necessary to carry out high-precision positioning and real-time monitoring.In this paper,based on the real-time monitoring results of the gob group between line 39 and 51 of Daboshan Mountain,high-precision spatial positioning and scientific analysis of the monitoring data of the source of the microseismic event are carried out to realize the early warning of the gob instability.The field application results show that the early warning period determined by b value and event number is too early,and the occurrence period is closer to the collapse time of goaf,while the early warning period and occurrence period determined by lgEI～Σ V4 and lgSCs～Σ VA are close to the collapse time of goaf.The comprehensive analysis determined that the warning period of big cave-in in the goaf of Dabaoshan Mine on October 1,2014 is from September 22 to September 25,and the mine could respond before September 26 to avoid risks.
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万方数据
