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(Φ)71mm同径开口式导斜楔偏斜(绕障)施工技术

Zhao-bing SHOU,Wen-hua LU,Yue-cheng LI,De-xin LI

Exploration Engineering(Rock & Soil Drilling and Tunneling)（2012）

Cited 19|Views5
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Abstract
针对采用绳索取心金刚石钻进工艺施工中深孔和深孔时会经常遇到处理难度很大的复杂孔内事故和补采岩矿心(煤心)的情况,经反复实践、完善、总结出了钻孔同径偏斜(绕障)施工技术.重点介绍了同径开口式导斜楔的加工制作、下井前校验、孔底架桥、投送方法、钻具组合、钻进注意事项及修孔操作要点.采用该项技术可以减少钻孔报废钻尺、节约施工成本和缩短施工工期.
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Key words
deep hole,deviation(bypassing barrier),open wedge with the same diameter of hole,medium-length hole
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