采矿与安全工程学报 ›› 2013, Vol. 30 ›› Issue (5): 686-691.

• 论文 • 上一篇    下一篇

深部巷道连续双壳加固机理及试验研究

  

  1. 1. 河北工程大学资源学院,河北 邯郸 056038;2. 河北工程大学土木工程学院,河北 邯郸 056038; 3. 冀中能源邯郸矿业集团有限公司,河北 邯郸 056002
  • 出版日期:2013-09-15 发布日期:2013-10-01
  • 作者简介:孙利辉(1978-),男,辽宁省清原县人,硕士,讲师,从事深部巷道支护研究、矿山压力及岩层控制教学工作。 E-mail:slh2002789@sina.com Tel:0310-8579527
  • 基金资助:

    国家自然科学基金项目(51174070);河北省自然科学基金项目(E2011402046)

Reinforcement mechanism and experimental study on continuous double shell of deep roadway

  • Online:2013-09-15 Published:2013-10-01

摘要: 由于深部巷道变形破坏严重,传统支护难以保证巷道稳定。本文在详细分析深部巷道围岩变形特征的基础上,提出深部巷道连续双壳加固理念,并分析双壳加固机理。通过相似材料模拟试验,对不同采深条件下裸巷、锚杆支护、连续双壳支护巷道围岩变形及应力分布规律进行研究。结果表明:随采深增大,裸巷围岩发生大面积整体破坏,不能自稳;锚杆支护巷道锚固区以里深部围岩继续发生离层破坏,巷道存在潜在破坏危险;连续双壳支护巷道只在巷帮浅部发生局部剪切破坏,围岩稳定性好。以陶二煤矿新南总巷道支护为例,验证了连续双壳支护的合理性。

关键词: 深部巷道, 连续双壳, 支护机理, 注浆

Abstract: Aiming at the problem that the deep roadway was deformed seriously, and the traditional support could not guarantee stability of roadway, this paper proposed idea of reinforcement continuous double-shell of the deep roadway based on analyzing deeply the deformation characteristics of deep surrounding rock and analyzed its reinforcement mechanism. The nude roadway, anchor support, deformation of surrounding rock in continuous double-shell support roadway and stress distribution rule of roadway under different deep mining conditions were studied through imitation test with similar materials. The results showed that with the mining depth increasing, the self-stability of the surrounding rock in nude roadway couldn’t be maintained for it was damaged largely; that there was potential failure risk for the bolt support roadway because its deep surrounding in inlet anchorage zone was destroyed in abscission layer; and that the local shear failure for continuous double-shell support roadway occurred in the shallow part wall of roadway and the stability of surrounding rock was good. The example of the new-southern roadway support of Tao-er coal mine proved the reasonability of continuous double- shell’s support.

Key words: deep roadways, continuous double-shell support, support mechanism, grouting