摘要
介绍了目前在含巨大孤石地层中的成孔方法 ,包括一般方法如开挖法、冲击钻进、回转钻进、大直径潜孔锤钻进、爆破法、复合钻进工艺。一般方法处理某些孤石具有一定的效果 ,但对质地较硬、表面光滑、形状不规则的孤石 ,则效果欠佳。若采用爆破法或复合性钻进工艺则可很好地解决含大孤石地层成孔难题。
The description is made of the introduction and analysis of the popular drilling hole technique that used in large boulder formation, including normal drilling technique such as digging, percussion drilling, rotary drilling, large diameter DTH drilling, explosion drilling technique and combined drilling technique. Some effects can be achieved by using normal methods, but the result is not satisfied when the boulder has a hard property, slide surface and irregular shape. Difficulties encountered in drilling large boulders are completely eliminated by use of explosion drilling and combined drilling technique.
出处
《世界地质》
CAS
CSCD
2000年第3期307-312,共6页
World Geology
关键词
成孔
冲击钻进
回转钻进
爆破
复合钻进工艺
drilling hole technique
percussion drilling
rotary drilling
blasting
combined drilling technique
