Application of wall grouting and pipe fixing method in water plugging construction of large flow gushing point
During the treatment process of the No.2 water inflow area in Nanshan Coal Mine,a large flow of high-pressure water gushed out from a grouting hole,due to long-term exposure to roof wa-ter,the stability and strength of the roadway roof decrease,posing a safety hazard to the original hole pipe.By installing a new borehole pipe deep into the stable bedrock within the original borehole,the a-bove-mentioned problems were solved through the"wall grouting and pipe fixing method",the new orifice pipe can withstand a pressure of 4.8 MPa during the water pressure test,and the subsequent grouting and water blocking construction was successfully completed.This method is suitable for grouting operations with water or when the original orifice pipe fails,and can be used as a reference for similar engineering design and construction.
roof water spraygrouting reinforcementmassive influx of watergrouting and fixing pipes between wallsorifice pipe
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