煤炭工程 ›› 2022, Vol. 54 ›› Issue (10): 43-48.doi: 10.11799/ce202210009

• 施工技术 • 上一篇    下一篇

厚煤层沿空掘巷围岩稳定结构主控因素研究

张京民,孟凡林   

  1. 1. 山东科技大学能源与矿业工程学院
    2. 库车县科兴煤炭实业有限责任公司
  • 收稿日期:2022-04-15 修回日期:2022-07-05 出版日期:2022-10-14 发布日期:2023-01-06
  • 通讯作者: 孙国庆 E-mail:1458407698@qq.com

Numerical Simulation Analysis of Main Controlling Factors of Surrounding Rock Stability Structure of Gob-side Roadway

  • Received:2022-04-15 Revised:2022-07-05 Online:2022-10-14 Published:2023-01-06

摘要: 为获得影响厚煤层沿空巷道围岩结构稳定性的主控因素,以榆树泉煤矿1014工作面工程概况为背景,采用离散元程序UDEC模拟分析了巷道埋深、沿空煤柱宽度、侧向岩梁悬臂长度、基本顶破断位置距实体煤帮的距离、煤体完整性程度对厚煤层沿空巷道围岩结构稳定性影响,并引入“幅度差”计算公式量化各影响因素对结构稳定的影响程度。研究结果表明:巷道埋深、沿空煤柱宽度、侧向岩梁悬臂长度、基本顶破断位置距实体煤帮的距离、煤体完整性程度均对沿空巷道稳定性产生一定影响,影响程度由大到小为:煤体完整性程度>巷道埋深>沿空煤柱宽度>侧向岩梁悬臂长度>基本顶破断位置距实体煤帮的距离。

关键词: 厚煤层开采, 沿空掘巷, 围岩稳定, 数值模拟

Abstract: In order to obtain the main controlling factors affecting the stability of the surrounding rock structure of the gob-side roadway in the thick coal seam,taking the project overview of the 1014 working face of Yushuquan Coal Mine as the background,the discrete element program UDEC was used to simulate and analyze the roadway burial depth,gob-side coal pillar width and lateral direction. The rock beam cantilever length,the basic top breaking depth,and the degree of coal integrity affect the structural stability of the surrounding rock in the gob-side roadway in thick coal seams. The results show that the depth of the roadway,the width of gob pillar,the length of the lateral rock beam cantilever,the fracture depth of the main roof,and the integrity of the coal body all have a certain impact on the stability of gob-side roadway,the degree of influence from large to small:the integrity of the coal body>the depth of the roadway>the width of gob pillar>the length of the lateral rock beam cantilever>the fracture depth of the main roof.

中图分类号: