煤炭工程 ›› 2026, Vol. 58 ›› Issue (6): 54-61.doi: 10.11799/ce202606008

• 施工技术 • 上一篇    下一篇

强采动影响下超前空巷围岩应力变形特征及柔模支柱防控技术

王旭峰,刘 鹏   

  1. 国家能源神东煤炭有限责任公司 上湾煤矿,内蒙古 鄂尔多斯 017200

  • 收稿日期:2025-05-14 修回日期:2025-07-24 出版日期:2026-06-15 发布日期:2026-06-24
  • 通讯作者: 刘鹏 E-mail:179499230@qq.com

Stress and deformation characteristics of surrounding rock in pre-existing roadways ahead of the working face under strong mining disturbance and control technology using flexible formwork support pillars #br#

  • Received:2025-05-14 Revised:2025-07-24 Online:2026-06-15 Published:2026-06-24

摘要:

针对上湾煤矿12404综采工作面回采通过超前空巷阶段的围岩变形失稳难题,采用UDEC数值模拟结合现场工业性试验的方法,系统研究了不同超前距离下空巷围岩的应力、位移动态演化规律,对比分析了人工柔模支撑柱支护前后围岩变形与稳定性的差异。结果显示:无支护条件下,随着工作面逐步靠近空巷,采动扰动持续加剧;工作面距空巷20m范围内围岩失稳破坏最为剧烈,顶板最大下沉量可达1.8 m,巷帮水平位移峰值为421mm,易引发顶板垮落、底鼓及煤壁剥落等灾害,存在空巷垮塌与煤柱失稳诱发工作面压架的安全隐患。采用人工柔模支撑柱强化支护后,围岩应力分布趋于均匀,高应力集中现象得到有效弱化;空巷左右帮垂直应力峰值分别降低15.4%6.6%;顶板最大下沉量降至91.5mm,巷帮水平位移缩减151mm,围岩变形得到显著控制。研究表明,柔模支撑柱可有效承载上覆岩层竖向载荷,实现围岩应力的削峰与扩散,大幅提升强采动影响下超前空巷围岩的整体稳定性,保障工作面安全通过空巷。

关键词:

超前空巷, 围岩变形, 应力演化, 数值模拟, 柔模支柱

Abstract:

Regarding the problem of deformation and instability of the surrounding rock of the roadway during the passage through the empty roadway during the advancement process of the 12404 working face of Shangwan Coal Mine, numerical simulation and field testing methods were used to deeply study the stress and displacement response characteristics of the surrounding rock and their dynamic evolution laws of the goaf at different advance distances during the working face advancement process. The deformation characteristics and stability differences of the surrounding rock before and after the advance goaf support were compared and analyzed in detail. The results show that as the working face approaches the goaf, the surrounding rock of the roadway is significantly disturbed by mining, especially within a range of 20 meters from the goaf. Instability phenomena such as roof collapse, floor bulging, and coal caving are significantly intensified, and local stress concentration forms a high peak area. The maximum roof settlement reaches 1.8 meters, and the horizontal displacement of the coal caving reaches 376 mm. The risk of collapse of the goaf and subsequent instability of the advancing coal pillar increases. After the implementation of pillar support in the advanced goaf, the overall stress field of the surrounding rock tends to be uniform, and the high stress concentration of the roof, support and bottom rock layers is effectively weakened. The peak stress is generally reduced by 3-5 MPa, and the roof subsidence, pillar deformation and support failure are significantly reduced. The internal support columns of the advanced goaf not only bear vertical loads, but also achieve peak shaving and diffusion of surrounding rock stress, improving the mechanical stability of the surrounding rock structure and enhancing the stability of the roadway in complex stress environments. The research in this paper has important guiding significance and engineering reference value for the optimization of goaf support and safe mining under similar conditions.

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