• 论文
主办单位:煤炭科学研究总院有限公司、中国煤炭学会学术期刊工作委员会
潘二煤矿A组煤层底板灰岩水害微震监测
  • Title

    Microseismic monitoring on limestone water inrush at coal seam floor for group A coal layer of Pan’er Coal Mine

  • 作者

    查华胜张海江连会青钱佳威魏廷双唐忠义梅欢程婷婷

  • Author

    ZHA Huasheng,ZHANG Haijiang,LIAN Huiqing,QIAN Jiawei,WEI Tingshuang, TANG Zhongyi,MEI Huan,CHENG Tingting

  • 单位

    中国科学技术大学 地球和空间科学学院安徽万泰地球物理技术有限公司华北科技学院淮南矿业集团有限责任公司 潘二煤矿陕西长武亭南煤业有限责任公司

  • Organization
    1.School of Earth and Space Sciences,University of Science and Technology of China,Hefei230026,China;2.Anhui Wantai Geophyscial Technology Co.,Ltd.,Hefei230601,China;3.North China Institute of Science and Technology,Langfang065201,China;
    4.Pan’er Coal Mine of Huainan Mining Group Co.,Ltd.,Huainan232000,China;5.Shaanxi Changwu Tingnan Coal Industry Co.,Ltd.,Xianyang713600,China
  • 摘要

    采煤工作面底板突水是我国煤矿深部开采过程中面临的重要灾害问题之一其发生与煤层 地质条件和矿井生产活动相关。 煤层采动过程中会对底板产生破坏灰岩含水层上方原始导升带 在张性二次应力和承压水的共同作用下也会逐渐向上延伸当与煤层底板破坏带形成联通时便产 生了突水。 当煤层底板发生破坏时岩体破裂会产生微地震通过微地震的时空分布可以确定底 板破坏带的时空分布。 同时承压水向上入侵的过程中水流可能会和周围的固体介质相互作用产 生震荡信号并以弹性波的形式向四周传播。 利用微震监测系统在对潘二煤矿 组煤底板进行突 水监测时除了监测到大量岩体破裂产生的微地震信号还监测到该类水流震荡信号对应波形呈 类螺钉状且持续时间超过 20 s振幅主要在 10-5 ~ 10-4 V频率范围为 20 ~ 40 Hz。 因此在对煤层 底板下伏岩体微破裂信号进行微震定位确定煤层底板破坏带深度的基础上进一步通过对水流震 荡信号进行波形分析和定位可以得到灰岩含水层上覆岩体裂隙扩展进水的时空分布进而确定煤 层底板破坏带和承压水导高带的空间分布及互联情况。 为此针对煤层底板灰岩水害监测预警提 出基于微震和水流震荡信号时空分布特征联合分析的新思路和方法并在淮南矿业集团有限责任 公司潘二煤矿 组煤底板突水监测预警中得到了较好的应用


  • Abstract

    Water inrush from the floor of the coal mining face is one of the main disasters in deep coal mining in China, and its occurrence is related to the geological conditions of the coal seam and the mining activities. In the process of coal mining, the floor can be perturbed and damaged, and the original fracture zone for fluid uplifting above the limestone aquifer can also gradually extend upwards under the joint effect of secondary tensile stress and confined water pressure. When it is connected with the failure zone of the coal floor, water inrush occurs. The rock fracturing induced by floor damage can produce microseismic events. From the spatial and temporal distributions of microseismic events, the spatiotemporal distributions of the floor damage zones can be determined. At the same time, in the process of the upward invasion of confined water, the water can interact with the surrounding solid media to produce oscillations, which can propagate outwards in the form of elastic waves. By using the microseismic monitoring system for mining group A coal layer of Pan’er Coal Mine of Huainan Mining Group, in addition to monitoring large amounts of microseismic signals related to floor rock fracturing, the oscillation signals related to the interaction between fluid and solid medium was also detected for the first time. The corresponding waveform is screw like and lasts for more than 20 s, whose amplitude is mainly in the range of 10-5-10-4 V and frequency range is 20-40 Hz. Therefore, based on microseismic locations of floor fracturing signals, the authors can further analyze and locate fluid flow induced oscillation signals, and determine the temporospatial distribution of the fluid filled fractures overlying the limestone aquifer. As a result, the floor damage depth and the spatial distribution of uplifting zone for the confined water and their connections can be determined. Therefore, based on the joint analysis of microseismic locations and fluid induced oscillation signals in time and space, a new idea and method is proposed for monitoring and early warning of water inrush from coal limestone floor.  The new strategy have been applied in the monitoring and early warning of water inrush from coal floor of group A of Pan’er Coal Mine of Huainan Mining Group.

  • 关键词

    煤层底板突水微震监测微震时空分布水流震荡信号

  • KeyWords

    coal floor water inrush;microseismic monitoring;temporospatial distribution of microseismic locations; fluid flow oscillation signal

  • 引用格式
    查华胜,张海江,连会青,等.潘二煤矿 A 组煤层底板灰岩水害微震监测[J].煤炭学报,2022,47(8):3001-3014.
  • Citation
    ZHA Huasheng,ZHANG Haijiang,LIAN Huiqing,et al.Microseismic monitoring on limestone water inrush at coal seam floor for group A coal layer of Pan’er Coal Mine
    [J].Journal of China Coal Society,2022,47(8):3001-3014.
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