金剛石復(fù)合片鉆頭優(yōu)選參考表巖石硬度類別軟中軟中等中硬硬堅(jiān)硬可鉆性級(jí)別1234567891011普氏硬度F≤1010 < F≤15代表性巖石砂巖，石灰?guī)r，大理巖，白云巖，黃鐵礦，不堅(jiān)固的花崗巖、頁巖花崗巖，堅(jiān)固的砂巖、礫巖、石灰?guī)r、石英礦脈復(fù)合片(PDC)刮刀型鉆頭普通型????????加強(qiáng)型?????????高強(qiáng)型?????