DingHeJiang

Fracture Failure Analysis of Shank Adapter for Hydraulic Rock Drill

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

rock excavation

A Short History of Foreign Mining and Rock Excavation Machines and It’s Enlightenment

The paper covers the development and evolution of leading foreign rock drilling machinery manufacturers such as Ingersoll Rand, Eprioc, Atlas Copco, FAGERSTA, Montabert, and Sandvik, as well as the developmental history of rock drilling machinery and drilling tools. It also gives some advice on the

Hydraulic rock drill

Concise Introduction to EPIROC's COP MD20 Hydraulic Rock Drill

The paper outlines EPIROC’s COP MD20 hydraulic rock drill and analyzes its advantages in usage. This hydraulic rock drill is compared with COP 1838 in terms of structural features. The paper also assesses the technical road of double- side oil return system and the prospect of COP 1838 product.