采用空气潜孔锤钻进技术在井筒内施工泄水孔实践

袁店一井煤矿风井井筒基岩段施工中遇工作面大量涌水,排水能力无法满足掘砌需要。为保证井筒掘砌施工安全,提出施工钻孔直达风巷的方法进行快速泄水,但已无法进行传统泥浆钻进。通过采用长距离悬空钻杆结合空气潜孔锤钻进技术以及孔口管的安装等施工工艺和措施,有效解决了岩粉上返、水压过大、钻杆摆动等施工技术难题,快速地完成了泄水孔的施工,成功将井筒基岩段涌水排入井下水仓,从而确保了井筒的安全和快速施工。

Practice of Drainage Hole Construction in Shaft by Air DTH Drilling Technology

Large amount of working face gushing water was encountered in the bedrock section of air shaft in Yuandian 1st coal mine, the drainage capacity could not meet the needs of excavation and lining. In order to ensure the safety of shaft excavation and lining, rapid releasing by direct drilling to air shaft was proposed, but the conventional mud drilling could not be used. By long-distance suspended drill pipe with air DTH hammer drilling technology, conductor pipe installation and some other construction technologies and measures, the technical difficulties of rock powder returning upward, too large water pressure, drill pipe swinging and some others have been effectively solved, the drainage hole construction is completed smoothly, the gushing water in bedrock section is discharged into the underground sump.