煤炭工程 ›› 2021, Vol. 53 ›› Issue (5): 68-73.doi: 10.11799/ce202105013

• 施工技术 • 上一篇    下一篇

工作面上覆风化带岩层地面注浆加固效果分析

余岩1,王传兵2,徐燕飞1,袁本庆3   

  1. 1. 平安煤炭开采工程技术研究院有限责任公司
    2. 淮南矿业集团
    3. 中煤科工集团重庆研究院有限公司
  • 收稿日期:2020-12-15 修回日期:2021-01-28 出版日期:2021-05-20 发布日期:2021-05-17
  • 通讯作者: 余岩 E-mail:644989041@qq.com

Analysis on the Effect of Ground Grouting on the Weathered Zone Overlying the Stope

  • Received:2020-12-15 Revised:2021-01-28 Online:2021-05-20 Published:2021-05-17
  • Contact: yan yuyu E-mail:644989041@qq.com

摘要: 松散含水层薄基岩采场易出现压架、出水事故,为保证薄基岩采场安全回采,针对顾北煤矿1512(3)工作面的地质情况,综合采用理论分析、力学实验、工业性试验等研究方法,研究了薄基岩采场风化带地面预注浆加固前后顶板结构、岩芯力学特性、回采矿压显现规律,并分析注浆加固效果。结果表明:风化带地面注浆有效扩散范围可达15m以上,注浆后风化带岩石胶结性、致密性、隔水性、稳定性增强,岩芯平均抗剪强度提高了40.6%,整体承载能力明显提升,配合高工作阻力的液压支架,实现了安全回采。

关键词: 地面注浆, 矿压显现, 力学性能, 风化带加固

Abstract: Abstract:The stope with thin bedrock in loose aquifer was prone to frame crushing and water discharge accidents, In order to ensure the safe mining of thin bedrock stope, based on the geological conditions of 1512 (3) stope in Gubei Coal Mine, Comprehensive theoretical analysis, mechanical experiment and industrial test, The laws of roof structure, core mechanical properties and stope pressure behavior before and after ground pre grouting reinforcement in weathered zone of thin bedrock stope were studied, In order to analyze the effect of grouting reinforcement. The results show that:The effective diffusion range of ground grouting in weathered zone was more than 15m, After grouting, the cementation, compactness, impermeability and stability of weathered rock were enhanced, The average shear strength of core was increased by 40.6%, The overall bearing capacity of the roof was significantly improved, Combined with the hydraulic support with high working resistance, the safe mining of working face was realized.