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.
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
关键词
大直径排水孔
钻探
垂直度
钻具组合
固井
large diameter drainage hole
drilling
verticality
drilling tool assembly
well cementing
