立井

• The research about the fracture regularity of the frozen shaft wall in surface soil
  冻结立井表土段井壁破坏规律研究
• Study of blasting techniques of frozen gravel stratum in vertical well tunneling
  立井掘进冻结砾石层爆破技术初步研究
• Test and research on perimeter blasting result of frozen soil in mine freezing shaft
  立井冻土周边爆破效果的试验研究
• Laser guide of vertical shaft
  立井激光指向
• Initial break and smooth blasting in deep bore hole blasting of mine shaft excavation
  立井深孔掘进爆破中的掏槽和光爆
• Research on nc - h high efficient blending material and application to mine construction
  缩短立井井筒凿井施工准备期的经验
• Study and application of the trackless auxiliary haulage technology for the vertical shaft
  立井无轨辅助运输技术研究与应用
• Shaft orientation survey
  立井定向测量
• Experience in improving the design quality for erection of the drainage pipeline in shaft
  提高立井井筒排水管路安装设计质量的几点尝试
• Through error control of full - scale sublevel driving of skip and cage shaft in xinji mine
  新集矿混合立井分段平行作业全断面贯通的误差控制