Erosion Wear Characteristics of Rock Eroded Using Abrasive Air Jet at 90° Impingement Angle

An abrasive air jet, which is sufficiently powerful to break rock, has significant potential in the field of assisted rock breaking, such as assistive tunnel excavation using a tunnel boring machine. To make its application more efficient and beneficial, a clear and definite erosion mechanism of an abrasive air jet is necessary. However, the present erosion mechanisms of an abrasive air jet have mostly neglected the secondary erosion of...