### Znaczenie B-lineacji w geologii strukturalnej i górnictwie

#### Abstract

IMPORTANCE OF B-LINEATION IN STRUCTURAL GEOLOGY AND MINING

Summary

The paper deals with a close trigonometric relation between the foliation dip angle a lineation dip angle j, foliation dip angle b_{1} and lineation azimuth b_{2} (Figs. 1–4). For the horizontal surface of the area this relation looks as follow:

tg j = tg a cos (b_{1}–b_{2})

The above formula allows us to calculate each of the values j, a, b_{1} or b_{2}, provided that three of them are known. Using this formula, the authors have analysed various possibilities of foliation surface orientation horizontal, diagonal and vertical), where B-lineation reveals different spatial orientation. Mutual relations of spatial orientation of foliation plane and B-lineation have been analysed also from the viewpoint of desired depth h in the, formula h = a tg j, where a is the distance of two points (i.e. site, where B-lineation measurement has, been made and point, at which the bore hole is situated).