不同厚度软分层煤与瓦斯突出的微震前兆分布特征  

Microseism Precursory Characteristics of Coal and Gas Outburst for Contains Different Thickness of Soft Stratification

作　　者：段东[1] 王辉跃[2] 冯小静[1] 董全[2] 

机构地区：[1]太原理工大学矿业工程学院,山西太原030024 [2]煤炭科学研究总院沈阳研究院煤矿安全技术国家重点实验室,辽宁沈阳110016

出　　处：《煤矿安全》2011年第9期9-11,共3页Safety in Coal Mines

基　　金：国家自然科学基金重点资助项目(40638040);国家自然科学基金资助项目(10672028)

摘　　要：基于岩石破裂损伤理论和气固耦合方法,利用RFPA2D-GasFlow数值模拟系统,对含不同厚度软分层煤层发生煤与瓦斯突出的微震前兆特征进行了分析。研究结果表明:随着软分层厚度的增加,微震前兆在时间上的分布表现越来越模糊,平静期增长,煤与瓦斯突出规模变大;而微震前兆在空间上的分布越来越集中,其与煤与瓦斯突出发生的初始位置有较好的一致性。研究结果对微震监测技术在煤与瓦斯突出监测中的应用有一定的参考价值。According to the rock failure damage theories and the gas-solid coupling method,we use RFPA2D-GasFlow soft code,study the characteristics of microseism precursor of coal and gas outburst.It is that with the increment of soft stratification thickness,the characteristics of microseism precursor of coal and gas outburst are become fuzzy,and the times of seismic quiet period become long.The characteristics of microseism precursor of coal and gas outburst in space is become concentration with the increment of soft stratification thickness,and the location of microseism precursor is consistent with the location of initial failure of coal and gas outburst.

关 键 词：气固耦合 煤与瓦斯突出 数值试验 主震 微震前兆 软分层 

分 类 号：TD713[矿业工程—矿井通风与安全]