新街煤矿斜井隧道双模式盾构选型分析

Analysis on sizing of dual-mode shield machine used for inclined shaft of Xinjie Colliery

新街煤矿斜井隧道长6314 m,最大埋深660 m,隧道6°下坡,盾构穿越的地层复杂多变,单一模式的盾构无法满足需求,为解决盾构快速、安全、高效掘进问题,需要对盾构选型进行研究。通过对比分析不同类型盾构的地层适应性,结合长距离、大埋深、大坡度及高水压的工程特点,最终选择同时具备单护盾TBM模式与土压平衡模式的双模式复合盾构作为施工机械,并给出了盾构关键部件的选型要求。

The inclined shaft of Xinjie Colliery is 6 314 m in length, 660 m below the ground and 6°in descent obliquity, the stratum which the shield machine needs to cross is complicated, so the single-mode shield machine fails to satisfy the requirements. In order to realize rapid, safe and effective tunneling of the shield machine, its sizing needs studying. After contrasting the stratum adaptability of various shield machines, and based on the engineering characteristics of long distance, large depth, large obliquity and high water pressure, the dual-mode shield machine combining single-shield TBM mode with earth pressure balance mode was selected as the construction machinery, and the sizing requirements of the key components of the shield machine were offered.