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Relationship between Borehole Core Dip Angle and True Strata Dip Angle and Its Application
Author(s): 
Pages: 53-58
Year: Issue:  7
Journal: Coal Geology of China

Keyword:  rock core dip anglestrata true dip angleborehole deflectionstrata dipformula derivationspecial case study;
Abstract:  For quite some time, the borehole core dip angle can be only used to calculate rock and coal true thickness. For the purpose to derive true strata dip angle from it and to be more widely used, the author has consulted a number of related books, found not de-tailed discussions on the concept of core dip angle and its relation to true dip angle. After lucubrating and practical verifications, have found that core dip angle and strata true dip angle are conceptually different, there are complex functional relationships between them. Through theoretical analysis and practical verification, educed function relationship formula between the two angles, and carried out re-lated discussion and description. Thus provided direct dip angle parameters for geological exploration in concealed areas, accordingly promoted borehole data analytical and utilization extent. The study has played an important role in aspects of correct analysis of coal and mineral layers occurrence and geological structure, and geological result quality promotion etc.
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