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.
    引用本文: 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.
    XIANG Peng, SU Xiaobo, JI Hongguang, JIANG Hua, PEI Feng. Temporal and Spatial Distribution Characteristics of Micro-seisms and Premonition of Rock Burst Under High Tectonic Stress[J]. Safety in Coal Mines, 2018, 49(2): 177-181.
    Citation: XIANG Peng, SU Xiaobo, JI Hongguang, JIANG Hua, PEI Feng. Temporal and Spatial Distribution Characteristics of Micro-seisms and Premonition of Rock Burst Under High Tectonic Stress[J]. Safety in Coal Mines, 2018, 49(2): 177-181.

    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: 针对煤矿冲击地压的预测难题,利用微震监测数据,对华亭煤田250105工作面回采过程中微震事件能量与频次关系、空间分布特征进行分析,探讨该工作面冲击地压机制及前兆特征。研究表明:250105工作面冲击地压分布在工作面超前220 m范围内煤层和底板,在沿采空区煤柱侧分布较多,主要是由高水平构造应力与工作面超前支承压力和残余支承压力叠加引起坚硬煤层或底板破断所致。冲击地压前微震能量和频次存在着“峰值-降低-升高-冲击”的模式,对微震点空间分布进行主成分分析发现第一主分量与工作面推进方向一致,第一主分量方差贡献率大幅下降并低于55%可视为冲击地压发生前兆之一。

       

      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.

       

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