煤炭工程 ›› 2014, Vol. 46 ›› Issue (7): 37-38.doi: 10.11799/ce201407013

• 施工技术 • 上一篇    下一篇

软弱厚煤层巷道变形特征及支护技术

张蕾   

  1. 国家知识产权局专利局专利审查协作北京中心
  • 收稿日期:2013-09-23 修回日期:2014-01-21 出版日期:2014-07-10 发布日期:2014-08-01
  • 通讯作者: 张蕾 E-mail:zlzm81@163.com

Deformation characteristics of the roadway with soft and weak coal seam and its supporting technology

  • Received:2013-09-23 Revised:2014-01-21 Online:2014-07-10 Published:2014-08-01

摘要:

软弱厚煤层巷道支护技术一直是我国软弱厚煤层矿区大型煤矿实现安全高效生产的关键难题之一。软弱厚煤层顶板在支护过程中承受极大拉应力作用,支护不当易导致突发性冒顶灾害;厚煤层中夹多层薄岩层使得支护期间易出现顶板离层变形;而软弱煤层易诱发整体大变形。首先分析了软弱厚煤层巷道变形破坏特征,在此基础上提出由高预应力锚杆、单体锚索、锚索桁架组成的联合支护系统;以山西某典型巷道为例,分析了生产地质特征, 并将该套支护系统应用于现场支护试验。试验结果显示顶板控制效果良好,对同类巷道的支护设计具有一定的参考价值。

关键词: 软弱煤层, 煤巷, 拉应力, 变形特征

Abstract:

The soft and weak coal roadway support in thick coal seam roof has been one of the key problems to realizing the safety and high efficiency production in large coal mines with complex supporting conditions in China. The soft and weak coal seam roof in roadways suffers from the large tensile stress and could lead to sudden roof collapse because of lots of thin rock layers inserting the extra thick coal seam leading to the roof abscission, and the roadway excavation in the soft and weak coal seam is easily deformed. Firstly, the deformation characteristics are analyzed, and then a set of combining support system including high pre-stress bolt, single cable and truss cable is put forward. Taking a typical soft and weak coal roadway in Shanxi Province, the production and geological characteristics are introduced, and the set of supporting system is applied to the roadway to have a supporting trial. The results show that the roof controlling effect is perfect and have a preferred value to the supporting design to the analogous coal roadways.