Mine Engineering 矿山工程, 2022, 10(1), 21-27
Published Online January 2022 in Hans.
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nology provide key technologies and necessary conditions for regional advanced treatment of Or-
dovician limestone water disaster and large-scale high-efficiency grouting transformation of Or-
dovician 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 pro-
vide the useful reference for the exploration and treatment of ground areas in the prevention and
control of water disasters.
Keywords
Directional Drilling, Drilling Structure Design, Oblique Point, Monoclinic Stratum
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