单斜地层定向钻孔主孔结构优化设计及应用

Optimization Design and Application of Main Hole Structure of Directional Drilling in Monoclinic Stratum

研究应用地面多分支近水平定向钻探技术,为区域超前治理奥灰水害和大规模高效注浆改造奥灰顶部含水层提供关键技术及必要条件。本文针对顾北南一采区实际的地质条件,结合地面定向水平孔煤层底板超前注浆所使用的钻探技术方案进行分析和总结。提出了一种在单斜地层条件下的定向钻孔主孔结构,希望此研究可以为地面区域探查治理在进行水害防治时提供有益参考。

The research and application of surface multi-branch near horizontal directional drilling technology provide key technologies and necessary conditions for regional advanced treatment of Ordovician limestone water disaster and large-scale high-efficiency grouting transformation of Ordovician limestone top aquifer. Based on the actual geological conditions of Gubeinan mining area, this paper analyzes and summarizes the drilling technology used in the advanced grouting of coal seam floor with directional horizontal holes on the ground. The main hole structure of directional drilling under the condition of monoclinic stratum is proposed. It is hoped that this study can provide the useful reference for the exploration and treatment of ground areas in the prevention and control of water disasters.