微震响应煤与瓦斯突出模拟试验  

Coal and gas outburst simulation experiment reacted by microseismic monitoring

作　　者：雷文杰[1,2] 李绍泉[2,3] 商鹏[1] 张瑶[1] 许江[4] 王振刚[1] 李青松[2] 

机构地区：[1]河南理工大学矿业工程博士后流动站,河南焦作454000 [2]贵州省煤矿设计研究院博士后工作站,贵州贵阳550001 [3]中国矿业大学(北京)力学与建筑工程学院,北京100083 [4]重庆大学西南资源开发及环境灾害控制工程教育部重点实验室,重庆400044

出　　处：《采矿与安全工程学报》2014年第1期161-166,共6页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(41172199;40872191;51374094);贵州省科技攻关项目(黔科合社G字(2011)4003);贵州省省长专项资金项目2011(10号);河南省科技创新人才项目(104100510002)

摘　　要：利用大型煤与瓦斯突出模拟试验系统，研制密封效果好、流变性能强的突出口材料及其制作工艺，模拟垂直和水平应力综合作用下自动触发煤与瓦斯突出的试验过程，利用高灵敏性的微震监测系统全程响应煤与瓦斯突出4个阶段，监测不同阶段突出腔体内的瓦斯压力，素描出突出孔洞大小和形状。微震响应信号分析频率0-2000 Hz，优选小波基函数，确定小波包最大分解层数，采用小波包分解分析模拟突出孕育、激发、发生和残余4个阶段微震信号时频特征；孕育阶段为高频信号，激发阶段信号频带范围逐渐加宽直至出现低频信号，突出阶段全频带响应，残余阶段信号由相对较低频带逐渐向高频过渡。研究成果为微震预警煤与瓦斯突出提供基础试验依据。In this paper, by using the large-scaled coal＆amp;gas outburst simulation experiment system, as well as the developed materials in cavity opening with the property of high sealing performance and powerful rheological behavior, the automatic outburst process was simulated under the comprehensive action of vetical and horizontal stresses. Meanwhile, the whole experiment processes were monitored by microseismic system with high sensitivity installed on the cavity surface. The gas pressure within the outburst assembly cavity in each stage was monitored, and the dimension and shape of the outburst cav-ity were outlined. The analyzed frequency ranges from 0 to 2 000 Hz. By the optimization of wavelet primary function, the maximum decomposition of wavelet packet was determined. Then, the frequency characteristics in the four stages was acquired by the decomposition and reconstitution of signals based on Wavelet Packet Transform. The results show that the signal frequencies in the inoculation stage are in the high frequency range, while the signals in the excitation stage start to broaden and the low frequency signals appear. In addition, the frequency in the outburst stage is distributed in the full-band, while the signals transmit from the low frequency band to high frequency in the residual stage. The research re-sults can provide reference to the early-warning of outburst by microseismic monitoring.

关 键 词：煤与瓦斯突出模拟 自动触发 微震响应 小波包变换 时频特征 

分 类 号：TD712[矿业工程—矿井通风与安全]