斜井锁口段快速施工与高效支护技术研究

斜井是直通地面的倾斜坑道,是重要的地下工程之一。由于斜井洞口段埋深浅,表层风化严重、岩体破碎,此段施工易造成地面塌陷,施工难度大,特别是由锁口段与基岩的过渡段,其施工工艺与支护技术成为影响斜井洞口段的难题。为确保斜井在过渡段的安全施工,需通过超前支护、人工开挖、锁口段加强支护及锁口段到基岩段联合支护的系统措施,该措施可解决工艺复杂、成本高的问题,有着施工工艺简单、快速支护、安全高效等特点。

Research on Fast Construction and High Efficient Supporting of Inclined Shaft Lock Section

Inclined shaft is an inclined tunnel which is directly connected to the ground and is one of the important underground engineering. Because of shallow buried depth, serious surface weathering and broken rock mass in the entrance section of inclined shaft, the construction of this section is easy to cause ground collapse, and the construction is difficult, especially in the transition section between the lock section and the bedrock, its construction technology and support technology become a problem affecting the entrance section of inclined shaft. In order to ensure the safety construction of the inclined shaft in the transition section, it is necessary to strengthen the support through advance support, manual excavation, lock section and the system measures of joint support from lock section to bedrock section. This measure can solve the problem of complex technology and high cost, and has the characteristics of simple construction technology, rapid support, safety and efficiency.