• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Rock Mechanics and Rock Engineering >Free-face-Assisted Rock Breaking Method Based on the Multi-stage Tunnel Boring Machine (TBM) Cutterhead
【24h】

Free-face-Assisted Rock Breaking Method Based on the Multi-stage Tunnel Boring Machine (TBM) Cutterhead

机译：基于多级隧道掘进机（TBM）刀盘的自由面破岩方法

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In order to improve the rock breaking efficiency of hard rock tunnel boring, many innovative rock breaking methods have been proposed (e.g., the water jet cutting, the high-power laser cutting, the impact-rotary drilling, and the undercutting method). However, most of the methods are not applicable to TBMs due to some structural reasons. Aiming on this problem, a free-face-assisted rock breaking method based on the multi-stage TBM cutterhead has been proposed. Series of proof-of-concept tests includes (1) the static compression test with vertical free face and (2) the rotary cutting tests in different free surface conditions were designed and carried out. The results show that the rock breaking force and efficiency can be significantly reduced and improved, respectively, with the assistance of the free face, due to the failure of the rock close to the free face is tensile-dominated failure. The influencing distance of the free face in the radial direction is at least 330 mm which covers about 5 disk cutters. Finally, the general structure of a small two-stage cutterhead (4 m in diameter) was tentatively designed in order to provide a possible approach to apply the free-face effect to TBMs.
机译：为了提高硬岩隧道掘进的岩石破碎效率，已经提出了许多创新的岩石破碎方法（例如，水射流切割，大功率激光切割，冲击旋转钻孔和底切方法）。但是，由于某些结构原因，大多数方法不适用于TBM。针对这一问题，提出了一种基于多级TBM刀盘的自由面破碎方法。概念验证测试系列包括（1）设计并执行了具有垂直自由面的静态压缩测试，以及（2）在不同自由表面条件下的旋转切削测试。结果表明，在自由面的辅助下，由于靠近自由面的岩石的破坏是张拉为主的破坏，因此可以分别显着降低和提高破岩力和效率。自由面在径向上的影响距离至少为330 mm，覆盖大约5个圆盘切刀。最后，初步设计了一个小型两级刀盘（直径4 m）的总体结构，以便为将自由面效应应用到TBM提供一种可能的方法。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号