• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ecological restoration >Research and Application of Low Density Roof Support Technology of Rapid Excavation for Coal Roadway
【24h】

Research and Application of Low Density Roof Support Technology of Rapid Excavation for Coal Roadway

机译：低密度屋顶支护技术对煤巷快速挖掘的研究与应用

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

The mismatch of speed of mining and excavating is the main contradiction of high efficiency production in China, improving the excavating speed of coal roadway is an effective way to solve the problem. According to the engineering geological conditions of the main haulage roadway 21205 in Hulusu Coal Mine, the technical problems existing in the original support scheme were analyzed, increased the excavating speed of roadway through improve support efficiency of single bolt and reducing density of bolt, a rapid excavation technology based on anchoring method of critical high efficiency and low density on roof of coal roadway was proposed. The influence of different bolt length and different pre-tightening force on the stability of roadway roof was studied by FLAC3D simulation, the results showed: (1) increasing the length and pre-tightening force can control the development of the roof vertical strain with a certain range; (2) as the length of bolt increases, the compressive stress zone of the rock layer between the two bolts increases and the compressive stress in the rock layer area of the anchorage section tends to increase; (3) with the increase of pre-tightening force, the effective, compressive stress zones between the two bolts overlap with each other, forming a whole, and the compressive stress values in the near zero stress zone increase. Decided the scheme that, bolt length is 4 m, pre-tightening force is 200 kN, and the support density is 0.5 root/m(2), industrial experiments were carried out. The mine pressure monitoring showed that the roof of the roadway has almost no ionosphere, and the deep ionosphere was well controlled. The monthly excavating progress of the roadway was increased from 520 to 825 m, with a rise of 58.7%, the technical and economical effects were significant. It was proved that the scheme is in line with the actual. It can provide reference for roadway rapid excavating support technology for similar conditions.
机译：采矿速度和挖掘速度不匹配是中国高效率生产的主要矛盾，提高煤炭道路的挖掘速度是解决问题的有效途径。根据高速拖道路21205的工程地质条件，分析了原始支撑方案中存在的技术问题，通过提高单螺栓的支撑效率提高道路的挖掘速度，减少螺栓密度，快速提出了基于临界高效率锚定方法的挖掘技术，煤巷屋盖上的低密度。通过FLAC3D仿真研究了不同螺栓长度和不同预紧固力对道路屋顶稳定性的影响，结果表明：（1）增加长度和预紧力可以控制屋顶垂直应变的发展某些范围; （2）随着螺栓的长度增加，两个螺栓之间的岩石层的压缩应力区增加，并且锚固部分的岩层区域中的压缩应力趋于增加; （3）随着预紧力的增加，两个螺栓之间的有效的压缩应力区域彼此重叠，形成一个整体，并且在接近零应力区域中的压缩应力值增加。确定方案，螺栓长度为4米，预紧力为200 kn，支撑密度为0.5根/ m（2），进行工业实验。矿井压力监测表明，道路的屋顶几乎没有电离层，并且深度电离层受到很好的控制。巷道的每月挖掘进展从520增加到825米，上升58.7％，技术和经济效应都很重要。事实证明，该计划符合实际。它可以为类似条件提供道路快速挖掘支持技术的参考。

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