桑树坪矿煤层底板注浆加固定向钻孔钻进技术
金鑫,段会军,崔岩波,魏欢欢
Drilling Technology of Directional Drilled Borehole for Grouting Reinforcement of Seam Floor in Sangshuping Coal Mine
煤炭工程 . 2018, (1): 45 -47 .  DOI: 10.11799/ce201801013