地面L型定向分支孔注浆加固煤层顶板厚风氧化带技术研究
黎明镜, 张敦喜, 李万峰, 李世辉
Research on Pre-Grouting Technology of upper Weathering and Oxidation plane of coal bed drilling by L-shaped Feather Branch Hole
煤炭工程 . 2019, (11): 38 -41 .  DOI: 10.11799/ce201911009