一、前言目前,随着科学技术的不断发展,过去靠打眼放炮来开掘岩洞和煤井的手工作业已逐渐被掘进机和煤矿竖井大型钻机等机械化开掘手段所代替。但由于在开掘时,各种破岩刀具在坚硬岩石冲击摩擦下产生严重磨损,如煤矿竖井大型钻机开掘一个约500米深的竖井,要消耗几百只滚刀,而这些滚刀大都依靠进口,一个滚刀就需要几千美元。所以,如何提高滚刀寿命、降低开掘 I. INTRODUCTION At present, with the continuous development of science and technology, the manual operation of digging caves and coal mines in the past by using shot blasting has been gradually replaced by mechanized digging means such as large-diameter drilling machines and coal mine shaft rigs. However, since various rock breaking tools cause severe wear under hard rock impact friction when digging, for example, large coal shaft drilling rigs dig a shaft about 500 meters deep and consume hundreds of hobs, and most of these hobs rely on imports A hob would cost thousands of dollars. So, how to improve hob life and reduce digging