声发射/微震监测煤岩瓦斯复合动力灾害的研究现状

Current situation of the study on acoustic emission and microseismic monitoring of coupling dynamic catastrophe for gas-filled coal-rock

煤岩瓦斯复合动力灾害是深井开采面临的一种由冲击地压和煤与瓦斯突出共同作用的新的灾害表现形式.微破裂前兆是煤岩瓦斯复合动力灾变过程显现的共性本质特征,具有微震和声发射活动性.笔者在收集和阅读大量国内外煤岩瓦斯复合动力灾害资料的基础上,对煤岩瓦斯复合型动力灾害的监测技术进行了研究.研究结果表明:声发射监测技术和微震监测技术的原理相同,不同的是频谱范围有差异.煤岩瓦斯复合动力灾变过程要经历从微小破裂萌生→扩展→集结和从无序到有序的发展过程,声发射和微震监测技术可以很好的对灾变的整个过程进行监测,是研究煤岩瓦斯复合动力灾害的重要手段,对研究煤岩瓦斯复合动力灾害机制和前兆辨识具有重要意义.

The coupling dynamic catastrophe of the deep gas-filled coalc-rock is a new hazard mode which due to the coupling of rock burst and coal and gas outburst. The precursor of the micro rupture is a common essential characteristic of the coal-rock dynamic disasters and has MS and AE activity. The authors study on monitoring technology of coupling dynamic catastrophe for gas-filled coal-rock in the basis of collecting and reading a lot of domestic and foreign of coupling dynamic catastrophe for gas-filled coal-rock data. The results show that the principle of AE and MS monitoring technology is same and the difference is that AE and MS monitoring technology have a difference spectrum range. The development process of coupling dynamic catastrophe for gas-filled coal-rock goes from tiny crack initiation, to propagation, to aggregation and from disorder to order. The whole process of the catastrophe can be good monitoring by using the AE and MS monitoring technology. It is an important mean to study the coupling dynamic catastrophe for gas-filled coal-rock, and it has a great significance to study the disaster mechanism and precursory identification of coupling dynamic catastrophe for gas-filled coal-rock.