Construction Technology of the Inclined Shaft through Thick Wind-Blown Sand Seam
The stratum movement failed to be kept in control, the steel brackets were broken out of torsion, and even the workers got covered up by the fallen roof when the advance support of pipe shed made of the regular steel bracket was utilized twice to tunnel through thick wind-blown sand stratum. Concrete line was unable to be poured, and construction was interrupted due to large roof collapse. To get over it, annular soil of upper bench is firstly excavated in shaft arch. The steel brackets are erected and the outer metal nets are suspended. Then the preliminary 100 mm thick concrete is shot, and the roof is supported by over-length advance condulet canopy. The inner metal nets are suspended; another 200mm-thick shotcrete is done. The workface is sealed by grouting; the sand stratum is reinforced by condulet grouting. The achievements of smooth tunneling provide valuable experiences for the similar project.
Ying Xu Yong Sun
School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan, Anhui, China
国际会议
International Mining Forum 2010(2010年国际采矿论坛 IMF 2010)
合肥
英文
72-76
2010-09-20（万方平台首次上网日期，不代表论文的发表时间）