On the documentation of displacements on mine survey plans

Abstract

When developing coal deposits, seams and associated mine workings are depicted on plans and sections. A seam plan and a vertical cross-section across the strike of rocks through the opening workings are mandatory components of a set of basic mine surveying plans for any conditions of coal seam occurrence. In conditions of steep seam dip, in addition to the above, a vertical projection of the seam onto a vertical plane passing through a line parallel to the dominant strike of the seam is also necessarily drawn up. When developing a group of inclined and steeply dipping seams, a horizontal section ("horizon" plan) is also drawn up with an image of the seams, capital and main development workings on it. On the listed mine surveying plans and sections - the main technical documents of the mine - the conditions of seam occurrence, and consequently, fault dislocations (displacements) must be properly reflected. A number of mandatory requirements are imposed on the specified documentation, contained in the current instructions and symbols.