• 责任者：Huang Ping (135 Geological Team ; Sichuan Bureau of Coal Geology ; Luzhou 646000 ; China)
• 刊名：Exploration Engineering
• 出版年：2011
• 卷期：38(3)
• 关键词：煤田勘探 ; coal exploration ; 钻孔偏斜 ; borehole deflection
• 页码：p.26-28,32
• 图表：2 illus., 3 refs.
• 分类号：2000
• 出版序号：20120626
• issnNo：ISSN1672-7428
• isbnNo：CN11-5063/TD

Coal seam often disappears or thinner than expected in coalfield drilling construction; therefore, the sampling experiment and the evaluation on minefield would be uncertain. In this case, the supplementary coal coring by slant drilling is necessary for accurately realizing the position and the thickness of coal seam with complete coal sample. Diamond wire-line coring drilling technology was adopted in the drilling construction in Dacun coalmine section of Guxu mining area of South Sichuan coalfield, the technology of supplementary coal coring with eccentric wedge was studied and mastered.