综合注浆与定向钻进技术应用于铁矿立井堵水

Application of Comprehensive Grouting and Directional Drilling Technology to Water Sealing of Mine Shaft in Iron Mine

马城铁矿1号主井基岩段高角度富水构造裂隙含水层，采用综合注浆与定向钻进技术进行地面预注浆堵水，取得了圆满成功，为铁矿床水患治理提供了经验。该井筒净直径6．5m，掘进直径7．5m，井深796．5m，采用冻、注、掘三同时施工方案，直孔＋S孔注浆，直孔注浆段深度为355-500m，S孔注浆段深度为500-964m。实际施工情况表明，S形定向钻孔技术应用于立井地面预注浆堵水工程，可以实现冻、注、掘三同时施工，缩短建井工期，获得较好的经济和社会效益。

There was a crack water bearing layer in a high angle watery structure at the base rock section of No. 1 main shaft in Macheng Iron Mine. A comprehensive grouting and directional drilling technology were applied to the surface pre-grouting and water sealing and a full success was obtained to provide the experiences for the water disaster control of the iron ore deposit. A net diameter of the mine shaft was 6.5m,an excavation diameter of the mine shaft was 7.5m and a depth of the mine shaft was 796.5m. A freezing, grouting and excavation simultaneous construction plan was applied to the mine shaft construction. The grouting operations were conducted with vertical holes and S boles. A depth of the vertical hole grouting section was 355-500m and a depth of the S hole grouting section was 500-964m. The actual construction condition showed that the S type directional drilling technology applied to the surface pre-grouting and water sealing project of the mine shaft could realize a freezing, grouting and excavation simultaneous construction. Thus the mine construction period could be reduced and good economic and social benefits could be obtained.