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| Construction technology of sudden water control by deep hole grouting with high pressure in abandoned frozen drilling hole |
| Su Yong1， Li Genqiao2 |
| 1. Tenth Engineering Office of China Coal Energy Company Limited， Handan 056003， China； 2. Dahaize Mine，
Yulin 719000， China |
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Abstract Aimed at construction sudden water accident in ventilation connecting roadway of main vertical shaft bunker upper port of Dahaize Mine，with engineering geology comparison on site，frozen construction and survey drilling adopted to check，it was concluded that the sudden water occurrence was owing to No.Z37 abandoned frozen drilling hole encountered when ventilation connecting roadway was constructed. The water inflow reached 155m3/h. When grouting and sealing technology with deep hole and high pressure was adopted，the water inflow reduced to 0.3 m3/h after grouting，which realized quick sealing and achieved satisfactory construction result. The technology provided reference for similar sudden water control by grouting .
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