METHOD FOR DETERMINATION OF POSSIBLE SPATIAL DISPLACEMENTS OF EARTH SURFACE OF COAL MINES IN TIME

Method for determination of possible spatial displacements of earth surface of coal mines in time includes arrangement of line of ground reference points, analysis of initial data of the conditions of coal bed working-out and date of previous studies of surface subsidence for the mine under study and the neighboring mines, with preparation of the reference-point base of plans of mining works according to the steps: the first step - scanning of separate fragments, with bringing those to one image, its orientation and following calibration, second step - setting coordinate system and calculation grid for calculation of subsidence at each mine, third step- vectorization and filling the table of attributive data for each breakage working and approximation of contours of those, fourth step - calculation of subsidence for separate workings with account of separate effects, with presentation of results of calculations as graphs of iso-lines, mathematical processing and classification of the objects obtained with use of plans of mine workings, archive data, geo-information system ôGeoMarkö, with affixment of the calculation net in the center of the main stem, with vectorization of raster images by polygons and with calculation of subsidence with use of the program WinMulda. One chooses specific point of observations at day surface in the zone of bed series working-out. One determines coordinates before implementation of mining works at that section. One determines time having passed from the beginning of soil motion to the instate when the mine working intersects the projection of the point of observation, time having passed from the instant of the mine working intersection of the projection of the point of observation and till the time of the motion time end. One enters the parameters obtained to the formula of subsidence calculation.