王惠风,陈同俊

• 1:华能煤炭技术研究有限公司
• 2:中国矿业大学资源与地球科学学院

摘要(Abstract)：

在回采前查明矿井工作面应力分布是矿井动力灾害有效防治的前提条件。为了在回采前有效查明矿井工作面的应力分布，综合样品超声实验测试、工作面应力分布仿真模拟和实例工作面折射波层析反演等技术方法，探讨了利用工作面顶板关键层折射纵波层析反演工作面应力分布的技术方法，并在此基础上分析了影响工作面应力分布的主要因素。研究结果表明，在0～40 MPa应力范围，灰岩顶板关键层样品的纵横波速度与应力单调正相关。相对于横波来说，纵波速度对应力变化更敏感，用其预测应力变化效果更好；相对于二维层析反演来说，三维层析反演不仅能表征工作面纵波速度分布的总体趋势，还能表征工作面纵波速度分布的精细变化，效果更优。对于实例工作面A来说，采空区和褶曲构造是影响工作面应力分布的主要因素。马鞍形构造和褶曲核部对应高应力异常，背斜到向斜间的过渡带对应低应力异常，新近采空区一侧工作面的应力明显高于采空较久一侧工作面。由于具有坚硬顶板关键层的矿井工作面广泛存在，该应力分布反演技术和影响因素分析方法具有理论意义和应用价值，值得深入研究和推广应用。

关键词(KeyWords)： 工作面;关键层;层析反演;速度分布;应力分布;影响因素

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划“多尺度多场条件下煤系战略性金属矿产的地球物理响应与设备研发”（2021YFC2902003）

作者(Author): 王惠风,陈同俊

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