Ultrahigh-concentrated point load fractures high-compressive- strength rocks

摘要

Conical diamond elements with very high-impact resistance provide flexibility in designing the numbers and placement of elements for special applications. There is a familiar story about a customer who walks into a hardware store looking for a 1/2-in.-diameter drillbit. However, what the customer really wants is a 1/2-in.-diameter hole; the bit just helps construct it.