CONNECTING AND ORIENTATION OF THE HORIZON OF MINING WORKINGS

11th International Multidisciplinary Scientific GeoConference SGEM2011, www.sgem.org, SGEM2011 Conference Proceedings/ ISSN 1314-2704, June 20-25, 2011, Vol. 1, 735-742 pp

ABSTRACT

As per Regulation of the Czech Mining Office Board No. 435/1992 of Law Digest, as amended, there is a duty to survey any and all mine workings in the national reference system of S-JTSK type. The objective of both connecting and orientation surveys on the
earth surface is to identify the end point position for the plummet segment and especially to identify their bearing. Connecting the horizon in the mine plays a role in transferring the coordinate values from the said plummet segment to the points ensuring
the basic orientation line of the connected mine workings. Distance measurement is done by means of a survey compared tape. Time demand and difficulty in organizing the work represent a disadvantage of this standard solution. Connecting and orientation
measuring might be executed in a way that the end point coordinates for plummeted segment both on the surface and underground are identified through the total station using a surveying omnidirectional prism inserted coaxially above the said plumb bob.
Then, distances are not measured using a survey tape, but by means of electronic optical distance meters.

Keywords: connecting measurement, orientation measurement, distance, optical distance meter, surface, underground