Standard Number: NB/T 11169-2023(NB/T11169-2023)
Chinese:煤矿井下瓦斯抽采长钻孔定向钻进技术规范
English:Technical Specification for Directional Drilling of Long Holes for Underground Gas Extraction in Coal Mines
Effective Date:2023-08-06
Standard Applicability:This document applies to the construction operation of directional drilling for long drilling holes for gas extraction in underground coal mines.
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