Abstract:

Advance large pipe roof support is one of the effective countermeasures for soft and fractured surrounding rocks in tunneling. Study is made on the optimization of the construction technology and construction parameters of advance large pipe roof support. A new construction technology for large pipe roof support without traditional enlarged working area is proposed, which can guarantee the construction safety, promote the tunneling speed and reduce the construction cost. The engineering practice demonstrates that the technology has obvious social and economic benefit and deserves popularization in similar projects in the future.

Key words: advance large pipe roof, parameter optimization, soft and fractured surrounding rock, mining method