Preliminary Application Analysis of New Gas Expansion Technology in Tunnel Excavation Engineering
In order to solve the problem of tunnel excavation without the permission of using explosives for blasting,this article applied the new gas expansion technology to tunnel excavation engineering for the first time,exploring a set of cutting,expanding,auxiliary,and peripheral expansion rock breaking methods suitable for tunnel excavation,and preliminarily summarized technical parameters such as drilling,inflation,blockage,ignition,and protection.After on-site application research on a tunnel excavation project in Guangdong,it has been verified.Applied research has shown that the new gas expansion technology can perform horizontal excavation in hard rock masses,with advantages such as safe operation,high rock breaking efficiency,no generation of explosive shock waves,and low vibration amplitude generated by gas expansion rock breaking,no involvement of civilian explosives.It can effectively solve the problem of not allowing the use of civil explosives in complex environments and using mechanical splitting method to excavate too slowly,and has broad engineering application prospects.
gas expansioncracking tubeinflation in the holeliquid oxygentunnel excavation