采矿与安全工程学报 ›› 2014, Vol. 31 ›› Issue (4): 575-579.

• 论文 • 上一篇    下一篇

渗水泥化巷道锚杆支护围岩稳定性控制研究

  

  1. 1.河南理工大学能源科学与工程学院,河南 焦作 454003;2.中国矿业大学煤炭资源与安全开采国家重点实验室,矿业工程学院,江苏 徐州 221116;3.九州大学工学府,日本 福冈 819-0395
  • 出版日期:2014-07-15 发布日期:2014-08-28
  • 作者简介:王成(1984—),男,安徽省含山县人,副教授,博士,从事巷道矿压理论及其控制技术、深井煤与瓦斯共采方面的研究。 E-mail:wangchengcumt@163.com Tel:15838905979
  • 基金资助:

    国家自然科学基金青年科学基金项目(51304065),河南理工大学博士基金项目(B2012-064)

Surrounding rock stability control with bolt support in seepage argillaceous roadway

  • Online:2014-07-15 Published:2014-08-28

摘要: 渗水泥化巷道锚杆支护可靠性差,导致此类巷道冒顶事故频发。通过典型岩样崩解和风化实验、渗水泥质巷道变形规律及锚杆锚固性能实测开展研究。结果表明:煤系地层含有黏土类矿物,使得巷道围岩遇水崩解,发生泥化现象,且风化脆裂,导致自身承载力急剧降低;渗水泥质巷道围岩变形破坏具有明显阶段性,演绎“减速变形-弱泥化-加速变形-强泥化-失稳”全过程,有效控制泥化进程是该类巷道稳定性控制的关键;提出了渗水泥化巷道围岩的控制技术,即新型“三高”锚杆强化控制技术和滞后注浆加固技术,给出巷道掘进后10~30 d最佳注浆时机,开展了典型的工程实践,取得了良好控制效果。

关键词: 渗流, 泥化围岩, 锚杆支护, &ldquo, 三高&rdquo, 锚杆, 滞后注浆, 强化控制

Abstract: Because of the poor reliability of bolt support in seepage argillaceous roadway, roof fall accidents occur frequently. In this paper, typical rock disintegration and weathering experiments, field tests of roadway deformation rules and bolt anchorage performance in water seepage roadways were studied. The results indicate that once the clay mineral in roadway surrounding rock meet water, the rock will become sliming and weathering embrittlement, which will cause a sharply decrease in the load bearing capability. In addition, the deformation of seepage argillaceous roadway has obvious stage characteristics, which shows whole process of “decelerated deformation-weak argillization-accelerated deformation-strong argillization-instability”. Thus, the key point of stability control in such roadway is to control the argillaceous process effectively. Meanwhile, the surrounding rock control technology in seepage argillaceous roadway was proposed, which is composed of “there-high” bolt enhancement technology and lag grouting strengthening technology. Moreover, the best grouting time which is 10 to 30 days after the roadway drivage was given, engineering practice was then conducted, and good results were obtained.

Key words: seepage;argillaceous surrounding rock;bolt support;“there-high&rdquo, bolt support;lag grouting;strengthen control