煤炭工程 ›› 2025, Vol. 57 ›› Issue (10): 46-52.doi: 10. 11799/ ce202510006

• 专题论坛 • 上一篇    下一篇

沿空工作面地面压裂卸压防冲机制及现场实测研究

王宾昌,闫耀东,靳心,郭登,盛鹏飞,白建飞   

  1. 1. 中煤陕西榆林能源化工有限公司,陕西 榆林 719100

    2. 中煤科工开采研究院有限公司,北京 100013

    3. 矿山顶板灾害防控国家矿山安全监察局重点实验室,北京 100013

  • 收稿日期:2025-07-15 修回日期:2025-08-11 出版日期:2025-10-10 发布日期:2025-11-12
  • 通讯作者: 闫耀东 E-mail:717540692@qq.com

Anti-scour mechanism and effect analysis of ground fracturing in gob-side working face

  • Received:2025-07-15 Revised:2025-08-11 Online:2025-10-10 Published:2025-11-12

摘要:

为深入探讨地面压裂措施对沿空工作面冲击危险性的影响及其防冲机制,以陕西大海则煤矿20103工作面作为工程背景,采用理论分析与现场探测方法,研究两相邻工作面间实施地面压裂措施对降低上、下工作面回采期间冲击危险性的防冲机制及防治效果,得出如下结论:在两相邻工作面间实施地面压裂措施,可在上工作面回采前弱化岩层的整体力学性能,进而降低压裂区域下方的整体静载水平;在下工作面回采阶段,沿空巷道围岩整体处于相对较低的静载应力环境,且地面压裂后侧向悬臂长度缩短,其断裂产生的动载能量可得到一定程度的削弱,最终降低动静载叠加引发的冲击危险性。现场侧向悬顶探测结果表明,通过对比压裂区域与未压裂区域的侧向悬臂结构可知,地面压裂效果良好,对侧向悬臂的弱化程度显著,有效实现“长臂变短臂”;地面压裂措施对降低沿空工作面冲击危险性具有良好作用,可为同类型矿井沿空工作面冲击地压防治提供参考。

关键词: 沿空工作面 , 地面压裂 , 冲击危险性 , 侧向悬臂结构 , 卸压机理

Abstract:

In order to further explore the influence of ground fracturing measures on the impact risk of gob-side working face and the anti-impact mechanism. Taking the 20103 working face of a mine in Shaanxi Province as the engineering background, the anti-impact mechanism and its control effect of ground fracturing measures between two adjacent working faces to reduce the impact risk during the mining of the upper working face and the lower working face were studied by means of theoretical analysis and field detection. The following conclusions are drawn : the implementation of ground fracturing measures between two adjacent working faces can reduce the mechanical properties of the rock strata as a unified whole before the mining of the upper working face, thus reducing the overall static load below the fracturing area. When mining in the lower working face, the surrounding rock of the roadway along the goaf is in a relatively low static load stress environment, and because of the decrease of the length of the lateral cantilever after the implementation of ground fracturing, the dynamic load energy from the fault zone is greatly reduced, and the impact risk caused by the superposition of dynamic and static loads is significantly reduced. In the actual lateral hanging roof detection process, the lateral cantilever structure of the fractured area and the unfractured area is obtained. The comparison results show that the ground fracturing effect is good, the weakening degree of the lateral cantilever is high, and the long arm is effectively realized. The implementation of ground fracturing has a good effect on reducing the impact risk of the working face along the goaf, which can provide reference for the prevention and control of rock burst in the working face along the goaf of the same type of mine.

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