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一、地层倾斜对岩心钻探钻孔弯曲的影响在采用岩心钻探进行地质勘探工作中,无论在煤田、金属矿区、非金属矿区或者在作水文工程地质钻探的时候,往往会遇到各种倾角不同以及硬度不等的地层。特别是在某些古老的变质岩区域(经过区域变质或动力变质),由于地层经过了强烈的造山作用和变质作用,岩层的倾角往往变的很陡,从几十度以至垂直的现象,同时岩层形成片理发育和软硬不均的互层。像我国山西高原和祁连山地槽的前震旦纪变质岩系出露的地区,这种现象都很典型,常见的岩层是各
I. The Influence of Stratigraphy and Inclination on Drilling and Boring Bends in Core Drilling During geological exploration using core drilling, coal mines, metal mines, non-metallic mining areas or when drilling for geological engineering are often encountered with different dip angles And unequal hardness of the formation. Especially in some ancient metamorphic rock areas (after regional metamorphism or dynamic metamorphism), due to the strong orogenic and metamorphic strata, the dip angle of rock strata often changes steeply from tens to even vertical Formation rock formation and the development of the software and software are uneven layers. Like the extinction of the former Sinian metamorphic rocks in the troughs of the Shanxi plateau and the Qilian mountains in our country, this phenomenon is typical. The common strata are