掘进

• Treatment to lost blast in grent fault drifting working face
  大断面掘进工作面的丢炮治理
• Analysis of the vertical stability of ebj - 75 type roadheader
  75型掘进机纵垂面稳定性分析
• Practicing improvement of ebj - 120s type roadheader used in the pit
  型掘进机井下实践改进
• Roof management of tunnelling in narrow and small pillar
  在窄小煤柱中掘进巷道的顶板管理
• Improvement of heading conveying system in 630 south roadway
  630南大巷掘进输送系统的改造
• Design analysis of cutterhead for combined shield machine
  复合型盾构掘进机刀盘的设计分析
• Application of controlled blasting in drivage of coal - rock drift
  在半煤岩巷道掘进中的应用
• Causes and prevention of gas explosion on excavation face
  掘进工作面瓦斯爆炸原因及预防对策
• New methed of quick excavation construction in super - deep shaft
  超深竖井快速掘进施工新方法
• The method of cutting off the shaft spares and common problem
  底板回采掘进应注意的几个问题