梧桐庄矿大直径排水孔工程钻探施工技术  

Drilling Construction Technology of Large Diameter Drainage Hole in Wutongzhuang Mine

作　　者：和新[1] 尹丽[1] 吴云莺[2] 

机构地区：[1]河北省地矿局国土资源勘查中心,河北石家庄050081 [2]河北省地矿局水文工程地质勘查院,河北石家庄050021

出　　处：《探矿工程（岩土钻掘工程）》2009年第5期33-35,共3页Exploration Engineering:Rock & Soil Drilling and Tunneling

摘　　要：介绍了梧桐庄矿区孔深646 m、终孔直径526 mm两口排水孔的钻探施工技术。该2口排水孔深度大,孔径大,垂直度要求高,地层软硬互层变化较大,易缩径,穿层钻进时易形成孔斜,施工难度大,通过采用先用小径钻进、后扩孔的施工方法,并采取合理的钻具组合和泥浆,制定有效的防斜技术措施等,顺利完成排水孔施工,施工质量满足设计要求。The paper introduced the drilling construction technology of drainage holes in Wutongzhuang mine. The 2 holes were of great depth and large diameter in soft-hard alternant stratum, construction was difficult with diameter shrinking and slant borehole. Small-diameter drilling and post-reaming were adopted with reasonable drilling tool assembly, drilling mud and effective deviation preventing measures, and the drainage hole construction was successfully completed.

关 键 词：大直径排水孔 钻探 垂直度 钻具组合 固井 

分 类 号：TU473.14[建筑科学—结构工程] U455.4[建筑科学—土工工程]