工作面煤与瓦斯突出综合监测指标建立

Establishment of comprehensive monitoring index for coal and gas outburst in working face

分析了微震事件的特点,建立了大、小事件的频数f、趋势Q和能量和E以及微震监测指标MS,确定了应力监测指标,并建立了瓦斯涌出量综合指标;同时,根据RFPA 2D数值模拟得出微震和应力之间相应的变化具有一定的同步性,且根据监测得到的瓦斯数据和微震数据得出微震事件与瓦斯涌出量的变化同样呈现同步性,最后,得出综合监测预警指标DI以及评价等级标准。

The characteristics of microseismic events are analyzed,the frequency f of large and small events,trend Q,energy,E and microseismic monitoring index MS are established.The stress monitoring index is determined and the comprehensive index of gas emission is established.At the same time,according to the numerical simulation of RFPA 2 D,the corresponding changes between microseismic and stress has a certain synchronicity.According to the monitoring of gas data and microseismic data,the results show that microseismic events are synchronous with the change of gas emission.Finally,the comprehensive monitoring and warning index DI and evaluation grade standards are obtained.