Investigation and application of acoustic emission monitoring effect on the outburst risk during coal roadway driving
In order to improve the reliability and accuracy of monitoring effect on the outburst risk during coal roadway driving,and make up for the shortcomings of effective monitoring methods during coal roadway driving,16-13 transportation roadway driving face in Xiaotun Coal Mine was took as the experimental site to examine the correlation between early warning indicator and daily outburst prediction indicators,gas emission,and exposed geological conditions in roadway and investigate the application effects of acoustic emission monitoring on the outburst risk during coal roadway driving by constructing an acoustic emission monitoring system.The results showed that the system monitoring process had realized monitoring and early warning of outburst risk during coal roadway driving,and ensured efficient and continuous operation;the critical value of 1.5 for using the trend recognition index K en of acoustic emission energy characteristic parameters as the warning index was reasonable and accurate,and the monitoring system could issue warning messages 4 to 6 m ahead of schedule,the warning results was consistent with the actual situation,and the monitoring effect was reliable.This system could be applied to the field of monitoring and early warning of outburst risk in coal roadway driving,and provide an effective monitoring method for safe and efficient driving of coal roadway in outburst mines.
coal roadway drivingoutburst riskacoustic emissioneffectiveness evaluationmonitoring and early warning
万方数据
维普
