煤炭工程 ›› 2025, Vol. 57 ›› Issue (10): 88-97.doi: 10. 11799/ ce202510011

• 生产技术 • 上一篇    下一篇

复杂断层构造影响区不规则工作面开采诱冲机制及防治技术研究

刘畅   

  1. 1. 中煤科工开采研究院有限公司,北京 100013

    2. 中煤科工(天津)岩层智控科技有限公司,天津 300392

    3. 煤炭智能开采与岩层控制全国重点实验室,北京 100013

  • 收稿日期:2024-10-08 修回日期:2025-07-21 出版日期:2025-10-10 发布日期:2025-11-12
  • 通讯作者: 刘畅 E-mail:670651631@qq.com

The Mechanism and Prevention of Rock Burst of Irregular Working Face in the Area Affected by Complex Fault Structure

  • Received:2024-10-08 Revised:2025-07-21 Online:2025-10-10 Published:2025-11-12

摘要:

针对地质条件和开采条件复杂工作面,易受强动载和高集中静载叠加作用而诱发冲击地压灾害的问题,以赵楼煤矿7302不规则工作面为研究对象,通过现场取样测试、冲击危险性评估、理论分析、精细化数值模拟、多参量监测预警及防治协同控制技术,对复杂断层构造影响区内不规则工作面开采诱冲机制及防治进行了研究,结果表明:滑移失稳所需剪切应力大小与断层弱面的剪切模量成正比,断层弱面上粘结点破坏强度一致性程度高时其将以粘滑摩擦的状态产生瞬时应力降而诱发强矿震;工作面开采宽度较大时覆岩中高位厚硬关键层更易达到极限破断垮距破断而形成强动载扰动,同时导致开采空间围岩内静载应力集中度和范围增大。采用精细化的三维数值模拟初步判定了工作面开采期间存在的潜在冲击危险区域,并指出工作面开采对Fz14逆断层和Fd64正断层造成扰动而致使其活化;采用多参量空间定量技术实时对工作面开采期间进行前兆识别和监测预警,及时反馈防治协同控制技术有效性。

关键词: 冲击地压 , 断层构造 , 不规则工作面 , 数值模拟 , 偏应力 , 协同控制

Abstract:

Rockburst disaster caused by the superimposed action of strong dynamic load and high concentrated static load formed by mining in the mining process of working face with complex geological conditions and mining conditions. This paper takes the 7302 irregular working face of Zhaolou Coal Mine as the research object, through on-site sampling test, impact risk assessment, theoretical analysis, refined numerical simulation, multi-parameter monitoring and warning, and prevention and control collaborative control technology, etc, The mechanism and prevention of mining induced impact of irregular working faces in the area affected by complex fault structures are studied. The results show that the shear modulus of the weak plane of the fault is in direct proportion to the shear stress required for sliding instability. When the consistency of the failure strength of the bond point on the weak plane of the fault is high, it will produce an instantaneous stress drop in the state of stick-slip friction and induce a strong mine earthquake; When the the working face width is large, the thick and hard layer in the middle and high level of the overburden is more likely to reach the limit breaking distance and break, resulting in strong dynamic load disturbance, at the same time, the static load stress concentration and range in the surrounding rock of the mining space are increased; The refined three-dimensional numerical simulation has determined the potential impact risk area, and pointed out that the mining has disturbed the Fz14 reverse fault and Fd64 normal fault, which led to its activation; Multi-parameter spatial quantitative technology can identify and monitor precursors during mining in real time, and can timely feedback the effectiveness of prevention and control collaborative control technology

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