Results of the analysis of the impact of exploitation carried out in three mines of Jastrzębie Mining Joint Stock Company close to pillars and exploitation encroaching upon safety pillars of 4 pit shafts on deformation of and damage to pit shaft pipes have been described in this paper. In case of some mines a period has been analyzed even since 1965. Making use of measurements and observations gained in natural conditions and numeric simulation in a method of finite elements with the use of COSMOS/M program a thesis has been proved that in the conditions of stone coal mines with the increase of the depth of exploitation there is a possibility of partial disturbance of defined boundaries of pillars of pit shafts without damaging and deforming these pit shafts. The course of walls prolonged in this way allows win back additional extraction without additional expenses.