煤炭工程 ›› 2023, Vol. 55 ›› Issue (3): 36-40.doi: 10.11799/ce202303007

• 施工技术 • 上一篇    下一篇

沿断层异形区段煤柱密集钻孔卸压护巷技术研究

孙延斌1,宋厚武2,彭向锋1   

  1. 1. 山东省济宁市微山县付村煤业有限公司
    2. 枣庄矿业集团付村煤业有限公司
  • 收稿日期:2022-08-22 修回日期:2022-11-17 出版日期:2023-03-20 发布日期:2023-04-11
  • 通讯作者: 孙延斌 E-mail:1134781551@qq.com

Study on Dense Drilling Pressure Relief in Irregular Pillar along Fault

  • Received:2022-08-22 Revised:2022-11-17 Online:2023-03-20 Published:2023-04-11
  • Contact: SUN Yanbin SONG HouwuPENG Xiangfeng E-mail:1134781551@qq.com

摘要: 针对付村煤矿复杂地质条件下异形区段煤柱巷道围岩受二次采动影响易于失稳的问题,结合理论分析、数值模拟和现场实测方法,对下区段煤柱巷道围岩稳定性控制展开研究,主要工作和结论如下:依据砌体梁理论合理配置了密集钻孔切顶技术参数|建立不同煤柱宽度的数值计算模型,模拟研究了不同煤柱宽度条件下受采动影响煤柱及巷道的围岩应力演化特征,验证了切顶参数及补强支护方案的合理性|建立了包含巷道围岩变形监测、顶板离层监测、锚杆(索)受力监测及围岩内部裂隙发展发育监测等内容的矿压监测体系。研究结果表明,切顶卸压方案成功预制了非连续人工弱面,优化了巷道围岩的应力状态,减弱了覆岩运动对煤柱应力的扰动。 

关键词: 断层, 异形煤柱, 采动应力, 钻孔卸压, 矿压观测

Abstract: In view of the instability problem of the coal column roadway in Fucun Coal Mine under the complex geological conditions of the secondary mining, theoretical analysis, numerical simulation and field measurement were conducted. The main work and conclusions are as follows. The technical parameters of dense drilling top cutting are rationally configured according to the theory of masonry beam. A numerical model of different coal pillar widths was established. The stress evolution characteristics of the coal column and roadway under the influence of mining was studied. The rationality of the top cutting parameters and the reinforcement and support scheme were verified. A mineral pressure monitoring system including the content of the monitoring of roadway surrounding rock deformation, roof off-layer monitoring, anchor rod (cable) force monitoring and the development monitoring of the internal cracks of the surrounding rock has been established. The results show that the top-cutting pressure relief scheme has successfully prefabricated the noncontinuous artificial weak surface. The stress state of the roadway surrounding rock has been optimized. The disturbance of coal pillar stress caused by rock covering movement is weakened.

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