ZhangJiGuang

The total length of Dapanshan Tunnel of Hangzhou-Shaoxing-TaizhouExpressway is 8635m,which is called "the first tunnel in East China".In order to solve the problem of excavation eficiency in the process of tunnel construction,Xuzhou XCMG Energy Equipment Co., Ltd.(hereinafter referred to as XCMG

China's gold mines are mainly concentrated in Shandong's Jiaodong Peninsula, and its underground gold mines are affected by seawater corrosion, causing frequent failures and reduced service life of rock drilling jumbo, which significantly affects construction efficiency and production costs. As a

The shank adapter of hydraulic rock drill broke after drilling 4000 m. Failure analysis is conducted using fracture morphology observation, chemical composition, mechanical properties and microstructure analysis. The results show that the material of shank adapter has well wear resistance and