Engineering coordinate system for vertical mine region based on GPS technique
(1.Shandong University of Science and Technology, Tai’an 271019, China2.Yanzhou Coal Industry Group Company, Ji’ning 272100, China3.Shanghai Astronomical Observatories, Chinese Academy of Sciences, Shanghai 200030, China4.School of Geoscience and Technology, Shandong University of Science and Technology, Tai’an 701019, China)
Abstract: For the problems existing in control network of vertical mine region established by conventional way, this paper advances a new scheme of establishing engineering coordinate system for vertical mine region. Based on the GPS positioning technique, through the relationship of coordinate transformation about a group of connecting points, the transforming parameters between the WGS-84 system and the Beijing54 system or Xi’an80 system about the region were calculated. The plane coordinate systems about the region can be maintained with a few of GPS control points using the method of GPS level, and fits the quasi-geoid about the region based on the Ellipsoid WGS-84. Huanghai Vertical Datum 1985 about the region can be maintained with the Ellipsoid WGS-84 as datum plane. Practice proves that there are advantages using the scheme to establish engineering coordinate system: the coordinate system as engineering foundation for vertical mine region will be in preservation for a long time; it is convenient and easy to carry out daily surveying work based on this coordinate system.
Key words: coordinate system； control network； GPS positioning； GPS level； quasi-geoid