煤矿安全2018，Vol.49Issue(2)：177-181,5.DOI:10.13347/j.cnki.mkaq.2018.02.048
高构造应力下冲击地压微震时空特征与前兆
Temporal and Spatial Distribution Characteristics of Micro-seisms and Premonition of Rock Burst Under High Tectonic Stress
摘要
Abstract
Aiming at the prediction problem of coal mine rock burst,the relationship of micro-seismic energy and frequency and the spatial distribution characteristics of micro-seismic of 250105 working face in Huating Coal Mine were analyzed in order to investigate the mechanism and premonition of rock burst in this working face.Research shows that the rock bursts in 250105 working face are mainly occurred in the coal seam or floor,which are less than 220 m ahead of working face and most of them are near the pillar.The rock burst is mainly caused by hard coal seam or floor broken due to superposition of high tectonic stress,abutment pressure of support and residual abutment pressure.Micro-seismic frequency and energy conform to a "peak-down-up-impact" model before the rock burst.It is found that the first principal component is consistent with the working face advancing direction by using the principal component to analyze the spatial distribution of micro-seismic point.Significant decrease or less than 55％ in the variance contribution rate of the first principal component is considered to be one of the premonitions to the impact of ground pressure.关键词
高构造应力/冲击地压/微震/前兆/时空特征Key words
high tectonic stress/rock burst/micro-seismic/precursor/temporal and spatial distribution characteristics分类
矿业与冶金引用本文复制引用
向鹏,苏晓波,纪洪广,蒋华,裴峰..高构造应力下冲击地压微震时空特征与前兆[J].煤矿安全,2018,49(2):177-181,5.基金项目
国家自然科学基金重点资助项目(51534002) （51534002）
国家重点研发计划资助项目(2016YFC0600800) （2016YFC0600800）
