ABSTRACT: Based on the analyse on the shortages of typical classification methods of drillability of stone. This paper puts forward the micro-drilling method to research the drillability of stone by using diamond bit , and expounds the problems that need to be solved when we use micro-drilling method, at the same time we decide to choose the value of whole parameter to scale drilling natures of stone, then by micro-drilling rests we confirm that the method is feasible.

KEYWORDS: micro-drilling method   rocks   drilling nature  grade